Version 204.1 by Dilisi S on 2024/11/19 20:08
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
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10 **Table of Contents:**
11
12 {{toc/}}
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18
19
20 = 1. Introduction =
21
22 == 1.1 What is the LT-22222-L I/O Controller? ==
23
24 (((
25 (((
26 {{info}}
27 **This manual is also applicable to the LT-33222-L.**
28 {{/info}}
29
30 The Dragino (% style="color:blue" %)**LT-22222-L I/O Controller**(%%) is an advanced LoRaWAN device designed to provide seamless wireless long-range connectivity with various I/O options, including analog current and voltage inputs, digital inputs and outputs, and relay outputs.
31
32 The LT-22222-L I/O Controller simplifies and enhances I/O monitoring and controlling. It is ideal for professional applications in wireless sensor networks, including irrigation systems, smart metering, smart cities, building automation, and more. These controllers are designed for easy, cost-effective deployment using LoRa wireless technology.
33 )))
34 )))
35
36 (((
37 With the LT-22222-L I/O Controller, users can transmit data over ultra-long distances with low power consumption using LoRa, a spread-spectrum modulation technique derived from chirp spread spectrum (CSS) technology that operates on license-free ISM bands.
38 )))
39
40 (((
41 You can connect the LT-22222-L I/O Controller to a LoRaWAN network service provider in several ways:
42
43 * If there is public LoRaWAN network coverage in the area where you plan to install the device (e.g., The Things Network), you can select a network and register the LT-22222-L I/O controller with it.
44 * If there is no public LoRaWAN coverage in your area, you can set up a LoRaWAN gateway, or multiple gateways, and connect them to a LoRaWAN network server to create adequate coverage. Then, register the LT-22222-L I/O controller with this network.
45 * Setup your own private LoRaWAN network.
46
47 {{info}}
48 You can use a LoRaWAN gateway, such as the [[Dragino LG308>>https://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]], to expand or create LoRaWAN coverage in your area.
49 {{/info}}
50 )))
51
52 (((
53 [[image:1653295757274-912.png]]
54
55
56 )))
57
58 == 1.2 Specifications ==
59
60 (% style="color:#037691" %)**Hardware System:**
61
62 * STM32L072xxxx MCU
63 * SX1276/78 Wireless Chip 
64 * Power Consumption:
65 ** Idle: 4mA@12V
66 ** 20dB Transmit: 34mA@12V
67 * Operating Temperature: -40 ~~ 85 Degrees, No Dew
68
69 (% style="color:#037691" %)**Interface for Model: LT22222-L:**
70
71 * 2 x Digital dual direction Input (Detect High/Low signal, Max: 50V, or 220V with optional external resistor)
72 * 2 x Digital Output (NPN output. Max pull-up voltage 36V,450mA)
73 * 2 x Relay Output (5A@250VAC / 30VDC)
74 * 2 x 0~~20mA Analog Input (res:0.01mA)
75 * 2 x 0~~30V Analog Input (res:0.01V)
76 * Power Input 7~~ 24V DC. 
77
78 (% style="color:#037691" %)**LoRa Spec:**
79
80 * Frequency Range:
81 ** Band 1 (HF): 862 ~~ 1020 MHz
82 ** Band 2 (LF): 410 ~~ 528 MHz
83 * 168 dB maximum link budget.
84 * +20 dBm - 100 mW constant RF output vs.
85 * +14 dBm high-efficiency PA.
86 * Programmable bit rate up to 300 kbps.
87 * High sensitivity: down to -148 dBm.
88 * Bullet-proof front end: IIP3 = -12.5 dBm.
89 * Excellent blocking immunity.
90 * Low RX current of 10.3 mA, 200 nA register retention.
91 * Fully integrated synthesizer with a resolution of 61 Hz.
92 * FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
93 * Built-in bit synchronizer for clock recovery.
94 * Preamble detection.
95 * 127 dB Dynamic Range RSSI.
96 * Automatic RF Sense and CAD with ultra-fast AFC.
97 * Packet engine up to 256 bytes with CRC.
98
99 == 1.3 Features ==
100
101 * LoRaWAN Class A & Class C modes
102 * Optional Customized LoRa Protocol
103 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
104 * AT Commands to change parameters
105 * Remotely configure parameters via LoRaWAN Downlink
106 * Firmware upgradable via program port
107 * Counting
108
109 == 1.4 Applications ==
110
111 * Smart buildings & home automation
112 * Logistics and supply chain management
113 * Smart metering
114 * Smart agriculture
115 * Smart cities
116 * Smart factory
117
118 == 1.5 Hardware Variants ==
119
120 (% style="width:524px" %)
121 |(% style="width:94px" %)**Model**|(% style="width:98px" %)**Photo**|(% style="width:329px" %)**Description**
122 |(% style="width:94px" %)**LT33222-L**|(% style="width:98px" %)(((
123 [[image:/xwiki/bin/downloadrev/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20230424115112-1.png?rev=1.1&width=58&height=106||alt="image-20230424115112-1.png" height="106" width="58"]]
124 )))|(% style="width:329px" %)(((
125 * 2 x Digital Input (Bi-direction)
126 * 2 x Digital Output
127 * 2 x Relay Output (5A@250VAC / 30VDC)
128 * 2 x 0~~20mA Analog Input (res:0.01mA)
129 * 2 x 0~~30V Analog Input (res:0.01v)
130 * 1 x Counting Port
131 )))
132
133
134
135 == 2. Assembling the device ==
136
137 == 2.1 Connecting the antenna ==
138
139 Connect the LoRa antenna to the antenna connector, **ANT**,** **located on the top right side of the device, next to the upper screw terminal block. Secure the antenna by tightening it clockwise.
140
141 {{warning}}
142 Warning! Do not power on the device without connecting the antenna.
143 {{/warning}}
144
145 == 2.2 Terminals ==
146
147 The  LT-22222-L has two screw terminal blocks. The upper screw treminal block has 6 terminals and the lower screw terminal block has 10 terminals.
148
149 Upper screw terminal block (from left to right):
150
151 (% style="width:634px" %)
152 |=(% style="width: 295px;" %)Terminal|=(% style="width: 338px;" %)Function
153 |(% style="width:295px" %)GND|(% style="width:338px" %)Ground
154 |(% style="width:295px" %)VIN|(% style="width:338px" %)Input Voltage
155 |(% style="width:295px" %)AVI2|(% style="width:338px" %)Analog Voltage Input Terminal 2
156 |(% style="width:295px" %)AVI1|(% style="width:338px" %)Analog Voltage Input Terminal 1
157 |(% style="width:295px" %)ACI2|(% style="width:338px" %)Analog Current Input Terminal 2
158 |(% style="width:295px" %)ACI1|(% style="width:338px" %)Analog Current Input Terminal 1
159
160 Lower screw terminal block (from left to right):
161
162 (% style="width:633px" %)
163 |=(% style="width: 296px;" %)Terminal|=(% style="width: 334px;" %)Function
164 |(% style="width:296px" %)RO1-2|(% style="width:334px" %)Relay Output 1
165 |(% style="width:296px" %)RO1-1|(% style="width:334px" %)Relay Output 1
166 |(% style="width:296px" %)RO2-2|(% style="width:334px" %)Relay Output 2
167 |(% style="width:296px" %)RO2-1|(% style="width:334px" %)Relay Output 2
168 |(% style="width:296px" %)DI2+|(% style="width:334px" %)Digital Input 2
169 |(% style="width:296px" %)DI2-|(% style="width:334px" %)Digital Input 2
170 |(% style="width:296px" %)DI1+|(% style="width:334px" %)Digital Input 1
171 |(% style="width:296px" %)DI1-|(% style="width:334px" %)Digital Input 1
172 |(% style="width:296px" %)DO2|(% style="width:334px" %)Digital Output 2
173 |(% style="width:296px" %)DO1|(% style="width:334px" %)Digital Output 1
174
175 == 2.3 Powering the device ==
176
177 The LT-22222-L I/O Controller can be powered by a **7–24V DC** power source. Connect your power supply’s positive wire to the VIN and the negative wire to the GND screw terminals. The power indicator **(PWR) LED** will turn on when the device is properly powered.
178
179 Once powered, the **TX LED** will **fast-blink 5 times** which means the LT-22222-L will enter the **work mode** and start to **join** The Things Stack. The **TX LED** will be on for **5 seconds** after joining the network. When there is a **downlink** message from the server, the **RX LED** will be on for **1 second**. When the device is sending an uplink message to the server, the **TX LED** will be on for **1 second**. See also LED status.
180
181 {{warning}}
182 We recommend that you power on the LT-22222-L after configuring its registration information with a LoRaWAN network server. Otherwise, the device will continuously send join-request messages to attempt to join a LoRaWAN network but will fail.
183 {{/warning}}
184
185
186 [[image:1653297104069-180.png]]
187
188
189 = 3. Registering with a LoRaWAN Network Server =
190
191 By default, the LT-22222-L is configured to operate in LoRaWAN Class C mode. It supports OTAA (Over-the-Air Activation), the most secure method for activating a device with a LoRaWAN network server. The LT-22222-L comes with device registration information that allows you to register it with a LoRaWAN network, enabling the device to perform OTAA activation with the network server upon initial power-up and after any subsequent reboots.
192
193 After powering on, the **TX LED** will **fast-blink 5 times** which means the LT-22222-L will enter the **work mode** and start to **join** the LoRaWAN network. The **TX LED** will be on for **5 seconds** after joining the network. When there is a **downlink** message from the server, the **RX LED** will be on for **1 second**. When the device is sending an uplink message to the server, the **TX LED** will be on for **1 second**. See also LED status.
194
195 In case you can't set the root key and other identifiers in the network server and must use them from the server, you can use [[AT Commands>>||anchor="H4.UseATCommand"]] to configure them on the device.
196
197 The network diagram below shows how the LT-22222-L is connected to a typical LoRaWAN network.
198
199 [[image:image-20220523172350-1.png||height="266" width="864"]]
200
201 === 3.2.1 Prerequisites ===
202
203 Make sure you have the device registration information such as DevEUI, AppEUI, and AppKey with you. The registration information can be found on a sticker that can be found inside the package. Please keep the **registration information** sticker in a safe place for future reference.
204
205 [[image:image-20230425173427-2.png||height="246" width="530"]]
206
207 The following subsections explain how to register the LT-22222-L with different LoRaWAN network server providers.
208
209 === 3.2.2 The Things Stack Sandbox (TTSS) ===
210
211 The Things Stack Sandbox was formally called The Things Stack Community Edition.
212
213 * Log in to your [[The Things Stack Sandbox>>https://eu1.cloud.thethings.network]] account.
214 * Create an application with The Things Stack if you do not have one yet.
215 * Go to your application page and click on the **End devices** in the left menu.
216 * On the End devices page, click on **+ Register end device**. Two registration options are available:
217
218 ==== 3.2.2.1 Using the LoRaWAN Device Repository ====
219
220 * On the **Register end device** page:
221 ** Select the option **Select the end device in the LoRaWAN Device Repository **under **Input method**.
222 ** Select the **End device brand**, **Model**, **Hardware version**, **Firmware version**, and **Profile (Region)** from the respective dropdown lists.
223 *** **End device brand**: Dragino Technology Co., Limited
224 *** **Model**: LT22222-L I/O Controller
225 *** **Hardware ver**: Unknown
226 *** **Firmware ver**: 1.6.0
227 *** **Profile (Region)**: Select the region that matches your device.
228 ** Select the **Frequency plan** that matches your device from the **Frequency plan** dropdown list.
229
230 [[image:lt-22222-l-dev-repo-reg-p1.png||height="625" width="1000"]]
231
232
233 * Register end device page continued...
234 ** Enter the **AppEUI** in the **JoinEUI** field and click the **Confirm** button. If The Things Stack accepts the JoinEUI you provided, it will display the message 'This end device can be registered on the network'.
235 ** In the **DevEUI** field, enter the **DevEUI**.
236 ** In the **AppKey** field, enter the **AppKey.**
237 ** In the **End device ID** field, enter a unique name for your LT-22222-N within this application.
238 ** Under **After registration**, select the **View registered end device** option.
239
240 [[image:lt-22222-l-dev-repo-reg-p2.png||height="625" width="1000"]]
241
242 ==== ====
243
244 ==== 3.2.2.2 Adding device manually ====
245
246 * On the **Register end device** page:
247 ** Select the option **Enter end device specifies manually** under **Input method**.
248 ** Select the **Frequency plan** that matches your device from the **Frequency plan** dropdown list.
249 ** Select the **LoRaWAN version** as **LoRaWAN Specification 1.0.3**
250 ** Select the **Regional Parameters version** as** RP001 Regional Parameters 1.0.3 revision A**
251 ** Click **Show advanced activation, LoRaWAN class and cluster settings** link to expand the hidden section.
252 ** Select the option **Over the air activation (OTAA)** under the **Activation mode.**
253 ** Select **Class C (Continuous)** from the **Additional LoRaWAN class capabilities** dropdown list.
254
255 [[image:lt-22222-l-manually-p1.png||height="625" width="1000"]]
256
257
258 * Register end device page continued...
259 ** Enter the **AppEUI** in the **JoinEUI** field and click the **Confirm** button. If The Things Stack accepts the JoinEUI you provided, it will display the message 'This end device can be registered on the network'
260 ** In the **DevEUI** field, enter the **DevEUI**.
261 ** In the **AppKey** field, enter the **AppKey**.
262 ** In the **End device ID** field, enter a unique name for your LT-22222-N within this application.
263 ** Under **After registration**, select the **View registered end device** option.
264 ** Click the **Register end device** button.
265
266 [[image:lt-22222-l-manually-p2.png||height="625" width="1000"]]
267
268
269 You will be navigated to the **Device overview** page.
270
271
272 [[image:lt-22222-device-overview.png||height="625" width="1000"]]
273
274
275 ==== 3.2.2.3 Joining ====
276
277 On the Device overview page, click on **Live data** tab. The Live data panel for your device will display.
278
279 Now power on your LT-22222-L. It will begin joining The Things Stack. In the **Live data** panel, you can see the **join-request** and **join-accept** messages exchanged between the device and the network server. Once successfully joined, the device will send its first **uplink data message** to the application it belongs to (in this example, **dragino-docs**).
280
281
282 [[image:lt-22222-join-network.png||height="625" width="1000"]]
283
284
285 By default, you will receive an uplink data message from the device every 10 minutes.
286
287 Click on one of a **Forward uplink data messages **to see its payload content. The payload content is encapsulated within the decode_payload {} JSON object.
288
289 [[image:lt-22222-ul-payload-decoded.png]]
290
291
292 If you can't see the decoded payload, it is because you haven't added the uplink formatter code. To add the uplink formatter code, select **End devices** > **LT-22222-L** > **Payload formatters** > **Uplink**. Then  select **Use Device repository formatters** for the **Formatter type** dropdown. Click the **Save changes** button to apply the changes.
293
294 {{info}}
295 The Things Stack provides two levels of payload formatters: application level and device level. The device-level payload formatters **override **the application-level payload formatters.
296 {{/info}}
297
298 [[image:lt-22222-ul-payload-fmt.png||height="686" width="1000"]]
299
300
301 == 3.3 Working Modes and Uplink Payload formats ==
302
303
304 The LT-22222-L has 5 **working modes**. It also has an interrupt/trigger mode for different types of applications that can be used together with any working mode as an additional feature. The default mode is MOD1 and you can switch between these modes using AT commands.
305
306 * (% style="color:blue" %)**MOD1**(%%): (default mode/factory set): 2ACI + 2AVI + DI + DO + RO
307
308 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
309
310 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
311
312 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
313
314 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
315
316 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
317
318 The uplink messages are sent over LoRaWAN FPort=2. By default, an uplink message is sent every 10 minutes.
319
320 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
321
322 (((
323 This is the default mode.
324
325 The uplink payload is 11 bytes long.
326
327 (% style="color:red" %)**Note:The maximum count depends on the bytes number of bytes.
328 The maximum count for four bytes is FFFFFFFF (hex) = 4294967295 (dec).
329 It starts counting again when it reaches the maximum value.**(% style="display:none" wfd-invisible="true" %)
330
331 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
332 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
333 |Value|(((
334 AVI1 voltage
335 )))|(((
336 AVI2 voltage
337 )))|(((
338 ACI1 Current
339 )))|(((
340 ACI2 Current
341 )))|**DIDORO***|(((
342 Reserve
343 )))|MOD
344 )))
345
346 (((
347 (% style="color:#4f81bd" %)*** DIDORO**(%%) is a combination of RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1, and its size is1 byte long as shown below.
348
349 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
350 |**bit 7**|**bit 6**|**bit 5**|**bit 4**|**bit 3**|**bit 2**|**bit 1**|**bit 0**
351 |RO1|RO2|--DI3--|DI2|DI1|--DO3--|DO2|DO1
352 )))
353
354 * RO is for the relay. ROx=1: CLOSED, ROx=0 always OPEN.
355 * DI is for digital input. DIx=1: HIGH or FLOATING, DIx=0: LOW.
356 * DO is for reverse digital output. DOx=1: LOW, DOx=0: HIGH or FLOATING.
357
358 (% style="color:red" %)**Note: DI3 and DO3 bits are not valid for LT-22222-L**
359
360 For example, if the payload is: [[image:image-20220523175847-2.png]]
361
362
363 **The interface values can be calculated as follows:  **
364
365 AVI1 channel voltage is 0x04AB/1000=1195(DEC)/1000=1.195V
366
367 AVI2 channel voltage is 0x04AC/1000=1.196V
368
369 ACI1 channel current is 0x1310/1000=4.880mA
370
371 ACI2 channel current is 0x1300/1000=4.864mA
372
373 The last byte 0xAA= **10101010**(b) means,
374
375 * [1] The RO1 relay channel is CLOSED, and the RO1 LED is ON.
376 * [0] The RO2 relay channel is OPEN, and the RO2 LED is OFF.
377 * **[1] DI3 - not used for LT-22222-L.**
378 * [0] DI2 channel input is LOW, and the DI2 LED is OFF.
379 * [1] DI1 channel input state:
380 ** DI1 is FLOATING when no sensor is connected between DI1+ and DI1-.
381 ** DI1 is HIGH when a sensor is connected between DI1- and DI1+ and the sensor is ACTIVE.
382 ** DI1 LED is ON in both cases.
383 * **[0] DO3 - not used for LT-22222-L.**
384 * [1] DO2 channel output is LOW, and the DO2 LED is ON.
385 * [0] DO1 channel output state:
386 ** DO1 is FLOATING when there is no load between DO1 and V+.
387 ** DO1 is HIGH and there is a load between DO1 and V+.
388 ** DO1 LED is OFF in both cases.
389
390 Reserve = 0
391
392 MOD = 1
393
394 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
395
396
397 (((
398 **For LT-22222-L**: In this mode, **DI1 and DI2** are used as counting pins.
399 )))
400
401 (((
402 The uplink payload is 11 bytes long.
403
404 (% style="color:red" %)**Note:The maximum count depends on the bytes it is.
405 The maximum count for four bytes is FFFFFFFF (hex) = 4294967295 (dec).
406 It starts counting again when it reaches the maximum value.**
407
408 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
409 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
410 |Value|COUNT1|COUNT2 |DIDORO*|(((
411 Reserve
412 )))|MOD
413 )))
414
415 (((
416 (% style="color:#4f81bd" %)***DIDORO**(%%) is a combination of RO1, RO2, FIRST, Reserve, Reserve, DO3, DO2 and DO1, and its size is 1 byte long as shown below.
417
418 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
419 |**bit 7**|**bit 6**|**bit 5**|**bit 4**|**bit 3**|**bit 2**|**bit 1**|**bit 0**
420 |RO1|RO2|FIRST|Reserve|Reserve|--DO3--|DO2|DO1
421
422 * RO is for the relay. ROx=1: CLOSED, ROx=0 always OPEN.
423 )))
424
425 * FIRST: Indicates that this is the first packet after joining the network.
426 * DO is for reverse digital output. DOx=1: LOW, DOx=0: HIGH or FLOATING.
427
428 (((
429 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L**
430
431
432 )))
433
434 (((
435 **To activate this mode, run the following AT commands:**
436 )))
437
438 (((
439 (% class="box infomessage" %)
440 (((
441 **AT+MOD=2**
442
443 **ATZ**
444 )))
445 )))
446
447 (((
448
449
450 (% style="color:#4f81bd" %)**AT Commands for counting:**
451 )))
452
453 (((
454 **For LT22222-L:**
455
456 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)** (sets the DI1 port to trigger on a LOW level. The valid signal duration is 100ms) **
457
458 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)** (sets the DI1 port to trigger on a HIGH level. The valid signal duration is 100ms) **
459
460 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)** (sets the DI2 port to trigger on a LOW level. The valid signal duration is 100ms) **
461
462 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)** (sets the DI2 port to trigger on a HIGH level. The valid signal duration is 100ms) **
463
464 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)** (sets the COUNT1 value to 60)**
465
466 (% style="color:blue" %)**AT+SETCNT=2,60 **(%%)**(sets the COUNT2 value to 60)**
467 )))
468
469
470 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
471
472 (% style="color:red" %)**Note: The maximum count depends on the bytes it is.
473 The maximum count for four bytes is FFFFFFFF (hex) = 4294967295 (dec).
474 It starts counting again when it reaches the maximum value.**
475
476 **LT22222-L**: In this mode, the DI1 is used as a counting pin.
477
478 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
479 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
480 |Value|COUNT1|(((
481 ACI1 Current
482 )))|(((
483 ACI2 Current
484 )))|DIDORO*|Reserve|MOD
485
486 (((
487 (% style="color:#4f81bd" %)***DIDORO**(%%) is a combination of RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1, for a total of 1 byte, as shown below.
488
489 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
490 |**bit 7**|**bit 6**|**bit 5**|**bit 4**|**bit 3**|**bit 2**|**bit 1**|**bit 0**
491 |RO1|RO2|FIRST|Reserve|Reserve|--DO3--|DO2|DO1
492 )))
493
494 * RO is for the relay. ROx=1: closed, ROx=0 always open.
495 * FIRST: Indicates that this is the first packet after joining the network.
496 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or floating.
497
498 (((
499 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
500 )))
501
502
503 (((
504 **To activate this mode, run the following AT commands:**
505 )))
506
507 (((
508 (% class="box infomessage" %)
509 (((
510 **AT+MOD=3**
511
512 **ATZ**
513 )))
514 )))
515
516 (((
517 AT Commands for counting:
518
519 The AT Commands for counting are similar to the [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]]s.
520 )))
521
522
523 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
524
525 (% style="color:red" %)**Note:The maximum count depends on the bytes it is.
526 The maximum count for four bytes is FFFFFFFF (hex) = 4294967295 (dec).
527 It starts counting again when it reaches the maximum value.**
528
529
530 (((
531 **LT22222-L**: In this mode, the DI1 is used as a counting pin.
532 )))
533
534 (((
535 The AVI1 is also used for counting. It monitors the voltage and checks it every **60 seconds**. If the voltage is higher or lower than VOLMAX mV, the AVI1 count increases by 1, allowing AVI1 counting to be used to measure a machine's working hours.
536
537 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
538 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
539 |Value|COUNT1|AVI1 Counting|DIDORO*|(((
540 Reserve
541 )))|MOD
542 )))
543
544 (((
545 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination of RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1, for a total of 1 byte, as shown below.
546
547 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
548 |**bit 7**|**bit 6**|**bit 5**|**bit 4**|**bit 3**|**bit 2**|**bit 1**|**bit 0**
549 |RO1|RO2|FIRST|Reserve|Reserve|--DO3--|DO2|DO1
550 )))
551
552 * RO is for the relay. ROx=1: closed, ROx=0 always open.
553 * FIRST: Indicates that this is the first packet after joining the network.
554 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or floating.
555
556 (((
557 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
558
559
560 )))
561
562 (((
563 **To activate this mode, run the following AT commands:**
564 )))
565
566 (((
567 (% class="box infomessage" %)
568 (((
569 **AT+MOD=4**
570
571 **ATZ**
572 )))
573 )))
574
575 (((
576 AT Commands for counting are similar to the [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]]s.
577 )))
578
579 (((
580 **In addition to that, below are the commands for AVI1 Counting:**
581
582 (% style="color:blue" %)**AT+SETCNT=3,60 **(%%)**(Sets AVI1 Count to 60)**
583
584 (% style="color:blue" %)**AT+VOLMAX=20000 **(%%)**(If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
585
586 (% style="color:blue" %)**AT+VOLMAX=20000,0 **(%%)**(If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
587
588 (% style="color:blue" %)**AT+VOLMAX=20000,1 **(%%)**(If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
589 )))
590
591
592 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
593
594 (% style="color:red" %)**Note:The maximum count depends on the bytes it is.
595 The maximum count for four bytes is FFFFFFFF (hex) = 4294967295 (dec).
596 It starts counting again when it reaches the maximum value.**
597
598
599 **LT22222-L**: In this mode, the DI1 is used as a counting pin.
600
601 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
602 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
603 |Value|(((
604 AVI1 voltage
605 )))|(((
606 AVI2 voltage
607 )))|(((
608 ACI1 Current
609 )))|COUNT1|DIDORO*|(((
610 Reserve
611 )))|MOD
612
613 (((
614 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination of RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1, for a total of 1 byte, as shown below.
615
616 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
617 |**bit 7**|**bit 6**|**bit 5**|**bit 4**|**bit 3**|**bit 2**|**bit 1**|**bit 0**
618 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
619 )))
620
621 * RO is for the relay. ROx=1: closed, ROx=0 always open.
622 * FIRST: Indicates that this is the first packet after joining the network.
623 * (((
624 DO is for reverse digital output. DOx=1: output low, DOx=0: high or floating.
625 )))
626
627 (((
628 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
629 )))
630
631 (((
632 **To activate this mode, run the following AT commands:**
633 )))
634
635 (((
636 (% class="box infomessage" %)
637 (((
638 **AT+MOD=5**
639
640 **ATZ**
641 )))
642 )))
643
644 (((
645 Other AT Commands for counting are similar to the [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]]s.
646 )))
647
648
649 === 3.3.6 AT+ADDMOD~=6 (Trigger Mode, Optional) ===
650
651
652 (% style="color:#4f81bd" %)**This mode is optional and intended for trigger purposes. It can operate __alongside__ with other modes.**
653
654 For example, if you configure the following commands:
655
656 * **AT+MOD=1 ** **~-~->**  Sets the default working mode
657 * **AT+ADDMOD6=1**   **~-~->**  Enables trigger mode
658
659 The LT-22222-L will continuously monitor AV1, AV2, AC1, and AC2 every 5 seconds. It will send uplink packets in two cases:
660
661 1. Periodic uplink: Based on TDC time. The payload is the same as in normal mode (MOD=1 as set above). These are (% style="color:#4f81bd" %)**unconfirmed**(%%) uplinks.
662 1. (((
663 Trigger uplink: sent when a trigger condition is met. In this case, LT will send two packets
664
665 * The first uplink uses the payload specified in trigger mode (MOD=6).
666 * The second packet uses the normal mode payload (MOD=1 as set above). Both are (% style="color:#4f81bd" %)**confirmed uplinks.**
667 )))
668
669 (% style="color:#037691" %)**AT Commands to set Trigger Conditions**:
670
671 (% style="color:#4f81bd" %)**Trigger based on voltage**:
672
673 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
674
675
676 **Example:**
677
678 AT+AVLIM=3000,6000,0,2000 (triggers an uplink if AVI1 voltage is lower than 3V or higher than 6V, or if AV2 voltage is higher than 2V)
679
680 AT+AVLIM=5000,0,0,0 (triggers an uplink if AVI1 voltage lower than 5V. Use 0 for parameters that are not in use)
681
682
683 (% style="color:#4f81bd" %)**Trigger based on current**:
684
685 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
686
687
688 **Example:**
689
690 AT+ACLIM=10000,15000,0,0 (triggers an uplink if AC1 current is lower than 10mA or higher than 15mA)
691
692
693 (% style="color:#4f81bd" %)**Trigger based on DI status**:
694
695 DI status triggers Flag.
696
697 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
698
699
700 **Example:**
701
702 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
703
704
705 (% style="color:#037691" %)**LoRaWAN Downlink Commands for Setting the Trigger Conditions:**
706
707 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
708
709 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
710
711 AA: Type Code for this downlink Command:
712
713 xx: **0**: Limit for AV1 and AV2; **1**: limit for AC1 and AC2; **2**: DI1and DI2 trigger enable/disable.
714
715 yy1 yy1: AC1 or AV1 LOW limit or DI1/DI2 trigger status.
716
717 yy2 yy2: AC1 or AV1 HIGH limit.
718
719 yy3 yy3: AC2 or AV2 LOW limit.
720
721 Yy4 yy4: AC2 or AV2 HIGH limit.
722
723
724 **Example 1**: AA 00 13 88 00 00 00 00 00 00
725
726 Same as AT+AVLIM=5000,0,0,0 (triggers an uplink if AVI1 voltage is lower than 5V. Use 0s for parameters that are not in use)
727
728
729 **Example 2**: AA 02 01 00
730
731 Same as AT+ DTRI =1,0 (Enable DI1 trigger / disable DI2 trigger)
732
733
734 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
735
736 MOD6 Payload: total of 11 bytes
737
738 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
739 |(% style="background-color:#4f81bd; color:white; width:60px" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white; width:69px" %)**1**|(% style="background-color:#4f81bd; color:white; width:69px" %)**1**|(% style="background-color:#4f81bd; color:white; width:109px" %)**1**|(% style="background-color:#4f81bd; color:white; width:49px" %)**6**|(% style="background-color:#4f81bd; color:white; width:109px" %)**1**|(% style="background-color:#4f81bd; color:white; width:50px" %)**1**
740 |Value|(((
741 TRI_A FLAG
742 )))|(((
743 TRI_A Status
744 )))|(((
745 TRI_DI FLAG+STA
746 )))|Reserve|Enable/Disable MOD6|(((
747 MOD(6)
748 )))
749
750 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if the trigger is set for this part. Totally 1 byte as below
751
752 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
753 |**bit 7**|**bit 6**|**bit 5**|**bit 4**|**bit 3**|**bit 2**|**bit 1**|**bit 0**
754 |(((
755 AV1_LOW
756 )))|(((
757 AV1_HIGH
758 )))|(((
759 AV2_LOW
760 )))|(((
761 AV2_HIGH
762 )))|(((
763 AC1_LOW
764 )))|(((
765 AC1_HIGH
766 )))|(((
767 AC2_LOW
768 )))|(((
769 AC2_HIGH
770 )))
771
772 * Each bit shows if the corresponding trigger has been configured.
773
774 **Example:**
775
776 10100000: Means the system has configure to use the trigger: AV1_LOW and AV2_LOW
777
778
779 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1 byte as below
780
781 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
782 |**bit 7**|**bit 6**|**bit 5**|**bit 4**|**bit 3**|**bit 2**|**bit 1**|**bit 0**
783 |(((
784 AV1_LOW
785 )))|(((
786 AV1_HIGH
787 )))|(((
788 AV2_LOW
789 )))|(((
790 AV2_HIGH
791 )))|(((
792 AC1_LOW
793 )))|(((
794 AC1_HIGH
795 )))|(((
796 AC2_LOW
797 )))|(((
798 AC2_HIGH
799 )))
800
801 * Each bit shows which status has been triggered on this uplink.
802
803 **Example:**
804
805 10000000: Means this uplink is triggered by AV1_LOW. That means the voltage is too low.
806
807
808 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
809
810 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:674px" %)
811 |(% style="width:64px" %)**bit 7**|(% style="width:68px" %)**bit 6**|(% style="width:63px" %)**bit 5**|(% style="width:66px" %)**bit 4**|(% style="width:109px" %)**bit 3**|(% style="width:93px" %)**bit 2**|(% style="width:109px" %)**bit 1**|(% style="width:99px" %)**bit 0**
812 |(% style="width:64px" %)N/A|(% style="width:68px" %)N/A|(% style="width:63px" %)N/A|(% style="width:66px" %)N/A|(% style="width:109px" %)DI2_STATUS|(% style="width:93px" %)DI2_FLAG|(% style="width:109px" %)DI1_STATUS|(% style="width:99px" %)DI1_FLAG
813
814 * Each bits shows which status has been triggered on this uplink.
815
816 **Example:**
817
818 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
819
820 00000101: Means both DI1 and DI2 trigger are enabled.
821
822
823 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
824
825 Downlink command to poll MOD6 status:
826
827 **AB 06**
828
829 When device got this command, it will send the MOD6 payload.
830
831
832 === 3.3.7 Payload Decoder ===
833
834 (((
835
836
837 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
838 )))
839
840
841 == 3.4 ​Configure LT-22222-L via AT Commands or Downlinks ==
842
843 (((
844 You can configure LT-22222-L I/O Controller via AT Commands or LoRaWAN Downlinks.
845 )))
846
847 (((
848 (((
849 There are two tytes of commands:
850 )))
851 )))
852
853 * (% style="color:blue" %)**Common commands**(%%):
854
855 * (% style="color:blue" %)**Sensor-related commands**(%%):
856
857 === 3.4.1 Common commands ===
858
859 (((
860 These are available for each sensors and include actions such as changing the uplink interval or resetting the device. For firmware v1.5.4, you can find the supported common commands under: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]s.
861 )))
862
863 === 3.4.2 Sensor-related commands ===
864
865 These commands are specially designed for the LT-22222-L. Commands can be sent to the device using options such as an AT command or a LoRaWAN downlink payload.
866
867
868 ==== 3.4.2.1 Set Transmit Interval ====
869
870 Sets the uplink interval of the device. The default uplink transmission interval is 10 minutes.
871
872 (% style="color:#037691" %)**AT command**
873
874 (% border="2" style="width:500px" %)
875 |**Command**|AT+TDC=<time>
876 |**Response**|
877 |**Parameters**|**time** : uplink interval is in milliseconds
878 |**Example**|(((
879 AT+TDC=30000
880
881 Sets the uplink interval to 30,000 milliseconds (30 seconds)
882 )))
883
884 (% style="color:#037691" %)**Downlink payload**
885
886 (% border="2" style="width:500px" %)
887 |**Payload**|(((
888 <prefix><time>
889 )))
890 |**Parameters**|(((
891 **prefix** : 0x01
892
893 **time** : uplink interval is in milliseconds, represented by 3  bytes in hexadecimal.
894 )))
895 |**Example**|(((
896 01 **00 75 30**
897
898 Sets the uplink interval to 30,000 milliseconds (30 seconds)
899
900 Conversion: 30000 (dec) = 00 75 30 (hex)
901
902 See [[RapidTables>>https://www.rapidtables.com/convert/number/decimal-to-hex.html?x=30000]]
903 )))
904
905 ==== 3.4.2.2 Set the Working Mode (AT+MOD) ====
906
907 Sets the working mode.
908
909 (% style="color:#037691" %)**AT command**
910
911 (% border="2" style="width:500px" %)
912 |(% style="width:97px" %)**Command**|(% style="width:413px" %)AT+MODE=<working_mode>
913 |(% style="width:97px" %)**Response**|(% style="width:413px" %)
914 |(% style="width:97px" %)**Parameters**|(% style="width:413px" %)(((
915 **working_mode** :
916
917 1 = (Default mode/factory set):  2ACI + 2AVI + DI + DO + RO
918
919 2 = Double DI Counting + DO + RO
920
921 3 = Single DI Counting + 2 x ACI + DO + RO
922
923 4 = Single DI Counting + 1 x Voltage Counting + DO + RO
924
925 5 = Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
926
927 6 = Trigger Mode, Optional, used together with MOD1 ~~ MOD5
928 )))
929 |(% style="width:97px" %)**Example**|(% style="width:413px" %)(((
930 AT+MOD=2
931
932 Sets the device to working mode 2 (Double DI Counting + DO + RO)
933 )))
934
935 (% class="wikigeneratedid" %)
936 (% style="color:#037691" %)**Downlink payload**
937
938 (% border="2" style="width:500px" %)
939 |(% style="width:98px" %)**Payload**|(% style="width:400px" %)<prefix><working_mode>
940 |(% style="width:98px" %)**Parameters**|(% style="width:400px" %)(((
941 **prefix** : 0x0A
942
943 **working_mode** : Working mode, represented by 1 byte in hexadecimal.
944 )))
945 |(% style="width:98px" %)**Example**|(% style="width:400px" %)(((
946 0A **02**
947
948 Sets the device to working mode 2 (Double DI Counting + DO + RO)
949 )))
950
951 ==== 3.4.2.3 Poll an uplink ====
952
953 Requests an uplink from LT-22222-L.
954
955 (% style="color:#037691" %)**AT command**
956
957 There is no AT Command to request an uplink from LT-22222-L
958
959 (% style="color:#037691" %)**Downlink payload**
960
961 (% border="2" style="width:500px" %)
962 |(% style="width:101px" %)**Payload**|(% style="width:397px" %)<prefix>FF
963 |(% style="width:101px" %)**Parameters**|(% style="width:397px" %)**prefix** : 0x08
964 |(% style="width:101px" %)**Example**|(% style="width:397px" %)(((
965 08 FF
966
967 Requests an uplink from LT-22222-L.
968 )))
969
970 ==== 3.4.2.4 Enable/Disable Trigger Mode ====
971
972 Enable or disable the trigger mode for the current working mode (see also [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]).
973
974 (% style="color:#037691" %)**AT Command**
975
976 (% border="2" style="width:500px" %)
977 |(% style="width:95px" %)**Command**|(% style="width:403px" %)AT+ADDMOD6=<enable/disable trigger_mode>
978 |(% style="width:95px" %)**Response**|(% style="width:403px" %)
979 |(% style="width:95px" %)**Parameters**|(% style="width:403px" %)(((
980 **enable/disable trigger_mode** :
981
982 1 = enable trigger mode
983
984 0 = disable trigger mode
985 )))
986 |(% style="width:95px" %)**Example**|(% style="width:403px" %)(((
987 AT+ADDMOD6=1
988
989 Enable trigger mode for the current working mode
990 )))
991
992 (% style="color:#037691" %)**Downlink payload**
993
994 (% border="2" style="width:500px" %)
995 |(% style="width:97px" %)**Payload**|(% style="width:401px" %)<prefix><enable/disable trigger_mode>
996 |(% style="width:97px" %)**Parameters**|(% style="width:401px" %)(((
997 **prefix** : 0x0A 06 (two bytes in hexadecimal)
998
999 **working mode** : enable (1) or disable (0), represented by 1 byte in hexadecimal.
1000 )))
1001 |(% style="width:97px" %)**Example**|(% style="width:401px" %)(((
1002 0A 06 **01**
1003
1004 Enable trigger mode for the current working mode
1005 )))
1006
1007 ==== 3.4.2.5 Poll trigger settings ====
1008
1009 Polls the trigger settings.
1010
1011 (% style="color:#037691" %)**AT Command:**
1012
1013 There is no AT Command for this feature.
1014
1015 (% style="color:#037691" %)**Downlink Payload**
1016
1017 (% border="2" style="width:500px" %)
1018 |(% style="width:95px" %)**Payload**|(% style="width:403px" %)<prefix>
1019 |(% style="width:95px" %)**Parameters**|(% style="width:403px" %)**prefix **: AB 06 (two bytes in hexadecimal)
1020 |(% style="width:95px" %)**Example**|(% style="width:403px" %)(((
1021 AB 06
1022
1023 Uplinks the trigger settings.
1024 )))
1025
1026 ==== 3.4.2.6 Enable/Disable DI1/DI2/DI3 as a trigger ====
1027
1028 Enable or disable DI1/DI2/DI3 as a trigger.
1029
1030 (% style="color:#037691" %)**AT Command**
1031
1032 (% border="2" style="width:500px" %)
1033 |(% style="width:98px" %)**Command**|(% style="width:400px" %)AT+DTRI=<DI1_trigger>,<DI2_trigger>
1034 |(% style="width:98px" %)**Response**|(% style="width:400px" %)
1035 |(% style="width:98px" %)**Parameters**|(% style="width:400px" %)(((
1036 **DI1_trigger:**
1037
1038 1 = enable DI1 trigger
1039
1040 0 = disable DI1 trigger
1041
1042 **DI2 _trigger**
1043
1044 1 = enable DI2 trigger
1045
1046 0 = disable DI2 trigger
1047 )))
1048 |(% style="width:98px" %)**Example**|(% style="width:400px" %)(((
1049 AT+DTRI=1,0
1050
1051 Enable DI1 trigger, disable DI2 trigger
1052 )))
1053
1054 (% class="wikigeneratedid" %)
1055 (% style="color:#037691" %)**Downlink Payload**
1056
1057 (% border="2" style="width:500px" %)
1058 |(% style="width:101px" %)**Payload**|(% style="width:397px" %)<prefix><DI1_trigger><DI2_trigger>
1059 |(% style="width:101px" %)**Parameters**|(% style="width:397px" %)(((
1060 **prefix :** AA 02 (two bytes in hexadecimal)
1061
1062 **DI1_trigger:**
1063
1064 1 = enable DI1 trigger, represented by 1 byte in hexadecimal.
1065
1066 0 = disable DI1 trigger, represented by 1 byte in hexadecimal.
1067
1068 **DI2 _trigger**
1069
1070 1 = enable DI2 trigger, represented by 1 byte in hexadecimal.
1071
1072 0 = disable DI2 trigger, represented by 1 byte in hexadecimal.
1073 )))
1074 |(% style="width:101px" %)**Example**|(% style="width:397px" %)(((
1075 AA 02 **01 00**
1076
1077 Enable DI1 trigger, disable DI2 trigger
1078 )))
1079
1080 ==== 3.4.2.7 Trigger1 – Set DI or DI3 as a trigger ====
1081
1082 Sets DI1 or DI3 (for LT-33222-L) as a trigger.
1083
1084
1085 (% style="color:#037691" %)**AT Command**
1086
1087 (% border="2" style="width:500px" %)
1088 |(% style="width:101px" %)**Command**|(% style="width:397px" %)AT+TRIG1=<interrupt_mode>,<minimum_signal_duration>
1089 |(% style="width:101px" %)**Response**|(% style="width:397px" %)
1090 |(% style="width:101px" %)**Parameters**|(% style="width:397px" %)(((
1091 **interrupt_mode** :  0: falling edge; 1: rising edge, 2: falling and raising edge (for MOD=1).
1092
1093 **minimum_signal_duration** : the **minimum signal duration** required for the DI1 port to recognize a valid trigger.
1094 )))
1095 |(% style="width:101px" %)**Example**|(% style="width:397px" %)(((
1096 AT+TRIG1=1,100
1097
1098 Set the DI1 port to trigger on a rising edge; the valid signal duration is 100 ms.
1099 )))
1100
1101 (% class="wikigeneratedid" %)
1102 (% style="color:#037691" %)**Downlink Payload**
1103
1104 (% border="2" style="width:500px" %)
1105 |(% style="width:101px" %)**Payload**|(% style="width:397px" %)<prefix><interrupt_mode><minimum_signal_duration>
1106 |(% style="width:101px" %)**Parameters**|(% style="width:397px" %)(((
1107 **prefix** : 09 01 (hexadecimal)
1108
1109 **interrupt_mode** : 0: falling edge; 1: rising edge, 2: falling and raising edge (for MOD=1), represented by 1 byte in hexadecimal.
1110
1111 **minimum_signal_duration** : in milliseconds, represented two bytes in hexadecimal.
1112 )))
1113 |(% style="width:101px" %)**Example**|(% style="width:397px" %)(((
1114 09 01 **01 00 64**
1115
1116 Set the DI1 port to trigger on a rising edge; the valid signal duration is 100 ms.
1117 )))
1118
1119 ==== 3.4.2.8 Trigger2 – Set DI2 as a trigger ====
1120
1121 Sets DI2 as a trigger.
1122
1123
1124 (% style="color:#037691" %)**AT Command**
1125
1126 (% border="2" style="width:500px" %)
1127 |(% style="width:94px" %)**Command**|(% style="width:404px" %)AT+TRIG2=<interrupt_mode>,<minimum_signal_duration>
1128 |(% style="width:94px" %)**Response**|(% style="width:404px" %)
1129 |(% style="width:94px" %)**Parameters**|(% style="width:404px" %)(((
1130 **interrupt_mode **:  0: falling edge; 1: rising edge, 2: falling and raising edge (for MOD=1).
1131
1132 **minimum_signal_duration** : the **minimum signal duration** required for the DI1 port to recognize a valid trigger.
1133 )))
1134 |(% style="width:94px" %)**Example**|(% style="width:404px" %)(((
1135 AT+TRIG2=0,100
1136
1137 Set the DI1 port to trigger on a falling edge; the valid signal duration is 100 ms.
1138 )))
1139
1140 (% style="color:#037691" %)**Downlink Payload**
1141
1142 (% border="2" style="width:500px" %)
1143 |(% style="width:96px" %)**Payload**|(% style="width:402px" %)<prefix><interrupt_mode><minimum_signal_duration>
1144 |(% style="width:96px" %)**Parameters**|(% style="width:402px" %)(((
1145 **prefix** : 09 02 (hexadecimal)
1146
1147 **interrupt_mode **: 0: falling edge; 1: rising edge, 2: falling and raising edge (for MOD=1), represented by 1 byte in hexadecimal.
1148
1149 **minimum_signal_duration** : in milliseconds, represented two bytes in hexadecimal
1150 )))
1151 |(% style="width:96px" %)**Example**|(% style="width:402px" %)09 02 **00 00 64**
1152
1153 ==== ====
1154
1155 ==== 3.4.2.9 Trigger – Set AC (current) as a trigger ====
1156
1157 Sets the current trigger based on the AC port. See also [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1158
1159 (% style="color:#037691" %)**AT Command**
1160
1161 (% border="2" style="width:500px" %)
1162 |(% style="width:104px" %)**Command**|(% style="width:394px" %)(((
1163 AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
1164 )))
1165 |(% style="width:104px" %)**Response**|(% style="width:394px" %)
1166 |(% style="width:104px" %)**Parameters**|(% style="width:394px" %)(((
1167 **AC1_LIMIT_LOW** : lower limit of the current to be checked
1168
1169 **AC1_LIMIT_HIGH **: higher limit of the current to be checked
1170
1171 **AC2_LIMIT_HIGH **: lower limit of the current to be checked
1172
1173 **AC2_LIMIT_LOW** : higher limit of the current to be checked
1174 )))
1175 |(% style="width:104px" %)**Example**|(% style="width:394px" %)(((
1176 AT+ACLIM=10000,15000,0,0
1177
1178 Triggers an uplink if AC1 current is lower than 10mA or higher than 15mA
1179 )))
1180 |(% style="width:104px" %)Note|(% style="width:394px" %)See also, [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1181
1182 (% style="color:#037691" %)**Downlink Payload**
1183
1184 (% border="2" style="width:500px" %)
1185 |(% style="width:104px" %)**Payload**|(% style="width:394px" %)<prefix><AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
1186 |(% style="width:104px" %)**Parameters**|(% style="width:394px" %)(((
1187 **prefix **: AA 01 (hexadecimal)
1188
1189 **AC1_LIMIT_LOW** : lower limit of the current to be checked, two bytes in hexadecimal
1190
1191 **AC1_LIMIT_HIGH **: higher limit of the current to be checked, two bytes in hexadecimal
1192
1193 **AC2_LIMIT_HIGH **: lower limit of the current to be checked, two bytes in hexadecimal
1194
1195 **AC2_LIMIT_LOW** : higher limit of the current to be checked, two bytes in hexadecimal
1196 )))
1197 |(% style="width:104px" %)**Example**|(% style="width:394px" %)(((
1198 AA 01 **27** **10 3A** **98** 00 00 00 00
1199
1200 Triggers an uplink if AC1 current is lower than 10mA or higher than 15mA. Set all values to zero for AC2 limits because we are only checking AC1 limits.
1201 )))
1202 |(% style="width:104px" %)Note|(% style="width:394px" %)See also, [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1203
1204 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1205
1206 Sets the current trigger based on the AV port. See also [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1207
1208 (% style="color:#037691" %)**AT Command**
1209
1210 (% border="2" style="width:500px" %)
1211 |(% style="width:104px" %)**Command**|(% style="width:387px" %)AT+AVLIM= AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
1212 |(% style="width:104px" %)**Response**|(% style="width:387px" %)
1213 |(% style="width:104px" %)**Parameters**|(% style="width:387px" %)(((
1214 **AC1_LIMIT_LOW** : lower limit of the current to be checked
1215
1216 **AC1_LIMIT_HIGH **: higher limit of the current to be checked
1217
1218 **AC2_LIMIT_HIGH **: lower limit of the current to be checked
1219
1220 **AC2_LIMIT_LOW** : higher limit of the current to be checked
1221 )))
1222 |(% style="width:104px" %)**Example**|(% style="width:387px" %)(((
1223 AT+AVLIM=3000,6000,0,2000
1224
1225 Triggers an uplink if AVI1 voltage is lower than 3V or higher than 6V, or if AV2 voltage is higher than 2V
1226 )))
1227 |(% style="width:104px" %)**Note**|(% style="width:387px" %)See also, [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1228
1229 (% style="color:#037691" %)**Downlink Payload**
1230
1231 (% border="2" style="width:500px" %)
1232 |(% style="width:104px" %)**Payload**|(% style="width:394px" %)<prefix><AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
1233 |(% style="width:104px" %)**Parameters**|(% style="width:394px" %)(((
1234 **prefix **: AA 00 (hexadecimal)
1235
1236 **AV1_LIMIT_LOW** : lower limit of the voltage to be checked, two bytes in hexadecimal
1237
1238 **AV1_LIMIT_HIGH **: higher limit of the voltage to be checked, two bytes in hexadecimal
1239
1240 **AV2_LIMIT_HIGH **: lower limit of the voltage to be checked, two bytes in hexadecimal
1241
1242 **AV2_LIMIT_LOW** : higher limit of the voltage to be checked, two bytes in hexadecimal
1243 )))
1244 |(% style="width:104px" %)**Example**|(% style="width:394px" %)(((
1245 AA 00 **0B B8 17 70 00 00 07 D0**
1246
1247 Triggers an uplink if AVI1 voltage is lower than 3V or higher than 6V, or if AV2 voltage is higher than 2V.
1248 )))
1249 |(% style="width:104px" %)**Note**|(% style="width:394px" %)See also, [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1250
1251 ==== 3.4.2.11 Trigger – Set minimum interval ====
1252
1253 Sets the AV and AC trigger minimum interval. The device won't respond to a second trigger within this set time after the first trigger.
1254
1255 (% style="color:#037691" %)**AT Command**
1256
1257 (% border="2" style="width:500px" %)
1258 |(% style="width:113px" %)**Command**|(% style="width:385px" %)AT+ATDC=<time>
1259 |(% style="width:113px" %)**Response**|(% style="width:385px" %)
1260 |(% style="width:113px" %)**Parameters**|(% style="width:385px" %)(((
1261 **time** : in minutes
1262 )))
1263 |(% style="width:113px" %)**Example**|(% style="width:385px" %)(((
1264 AT+ATDC=5
1265
1266 The device won't respond to the second trigger within 5 minutes after the first trigger.
1267 )))
1268 |(% style="width:113px" %)Note|(% style="width:385px" %)(% style="color:red" %)**The time must be greater than 5 minutes.**
1269
1270 (% style="color:#037691" %)**Downlink Payload**
1271
1272 (% border="2" style="width:500px" %)
1273 |(% style="width:112px" %)**Payload**|(% style="width:386px" %)<prefix><time>
1274 |(% style="width:112px" %)**Parameters**|(% style="width:386px" %)(((
1275 **prefix** : AC (hexadecimal)
1276
1277 **time **: in minutes (two bytes in hexadecimal)
1278 )))
1279 |(% style="width:112px" %)**Example**|(% style="width:386px" %)(((
1280 AC **00 05**
1281
1282 The device won't respond to the second trigger within 5 minutes after the first trigger.
1283 )))
1284 |(% style="width:112px" %)Note|(% style="width:386px" %)(% style="color:red" %)**The time must be greater than 5 minutes.**
1285
1286 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1287
1288 Controls the digital outputs DO1, DO2, and DO3
1289
1290 (% style="color:#037691" %)**AT Command**
1291
1292 There is no AT Command to control the Digital Output.
1293
1294
1295 (% style="color:#037691" %)**Downlink Payload**
1296
1297 (% border="2" style="width:500px" %)
1298 |(% style="width:115px" %)**Payload**|(% style="width:383px" %)<prefix><DO1><DO2><DO3>
1299 |(% style="width:115px" %)**Parameters**|(% style="width:383px" %)(((
1300 **prefix** : 02 (hexadecimal)
1301
1302 **DOI** : 01: Low,  00: High, 11: No action (1 byte in hex)
1303
1304 **DO2** : 01: Low,  00: High, 11: No action (1 byte in hex)
1305
1306 **DO3 **: 01: Low,  00: High, 11: No action (1 byte in hex)
1307 )))
1308 |(% style="width:115px" %)**Examples**|(% style="width:383px" %)(((
1309 02 **01 00 01**
1310
1311 If there is a load between V+ and DOx, it means DO1 is set to low, DO2 is set to high, and DO3 is set to low.
1312
1313 **More examples:**
1314
1315 (((
1316 01: Low,  00: High,  11: No action
1317
1318 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1319 |(% style="background-color:#4f81bd; color:white" %)**Downlink Code**|(% style="background-color:#4f81bd; color:white" %)**DO1**|(% style="background-color:#4f81bd; color:white" %)**DO2**|(% style="background-color:#4f81bd; color:white" %)**DO3**
1320 |02  01  00  11|Low|High|No Action
1321 |02  00  11  01|High|No Action|Low
1322 |02  11  01  00|No Action|Low|High
1323 )))
1324
1325 (((
1326 (((
1327 (% style="color:red" %)**Note: For the LT-22222-L, there is no DO3; the last byte can have any value.**
1328 )))
1329
1330 (((
1331 (% style="color:red" %)**The device will upload a packet if downlink code executes successfully.**
1332 )))
1333 )))
1334 )))
1335
1336 ==== ====
1337
1338 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1339
1340
1341 * (% style="color:#037691" %)**AT Command**
1342
1343 There is no AT Command to control Digital Output
1344
1345
1346 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1347
1348 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1349
1350
1351 This is to control the digital output time of DO pin. Include four bytes:
1352
1353 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1354
1355 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1356
1357 01: DO pins will change back to original state after timeout.
1358
1359 00: DO pins will change to an inverter state after timeout 
1360
1361
1362 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Port status:
1363
1364 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1365 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1366 |0x01|DO1 set to low
1367 |0x00|DO1 set to high
1368 |0x11|DO1 NO Action
1369
1370 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Port status:
1371
1372 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1373 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1374 |0x01|DO2 set to low
1375 |0x00|DO2 set to high
1376 |0x11|DO2 NO Action
1377
1378 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Port status:
1379
1380 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1381 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1382 |0x01|DO3 set to low
1383 |0x00|DO3 set to high
1384 |0x11|DO3 NO Action
1385
1386 (% style="color:#4f81bd" %)**Sixth, Seventh, Eighth, and Ninth Bytes**:(%%) Latching time (Unit: ms)
1387
1388
1389 (% style="color:red" %)**Note: **
1390
1391 Since firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1392
1393 Before firmware v1.6.0, the latch time only supported 2 bytes.
1394
1395 (% style="color:red" %)**Device will upload a packet if the downlink code executes successfully.**
1396
1397
1398 **Example payload:**
1399
1400 **~1. A9 01 01 01 01 07 D0**
1401
1402 DO1 pin, DO2 pin, and DO3 pin will be set to low, last for 2 seconds, and then revert to their original state.
1403
1404 **2. A9 01 00 01 11 07 D0**
1405
1406 DO1 pin is set to high, DO2 pin is set to low, and DO3 pin takes no action. This lasts for 2 seconds and then reverts to the original state.
1407
1408 **3. A9 00 00 00 00 07 D0**
1409
1410 DO1 pin, DO2 pin, and DO3 pin will be set to high, last for 2 seconds, and then all change to low.
1411
1412 **4. A9 00 11 01 00 07 D0**
1413
1414 DO1 pin takes no action, DO2 pin is set to low, and DO3 pin is set to high. This lasts for 2 seconds, after which DO1 pin takes no action, DO2 pin is set to high, and DO3 pin is set to low.
1415
1416
1417 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1418
1419
1420 * (% style="color:#037691" %)**AT Command:**
1421
1422 There is no AT Command to control Relay Output
1423
1424
1425 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1426
1427 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1428
1429
1430 (((
1431 If payload is 0x030100, it means setting RO1 to close and RO2 to open.
1432 )))
1433
1434 (((
1435 00: Close ,  01: Open , 11: No action
1436
1437 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1438 |(% style="background-color:#4f81bd; color:white" %)**Downlink Code**|(% style="background-color:#4f81bd; color:white" %)**RO1**|(% style="background-color:#4f81bd; color:white" %)**RO2**
1439 |03  00  11|Open|No Action
1440 |03  01  11|Close|No Action
1441 |03  11  00|No Action|Open
1442 |03  11  01|No Action|Close
1443 |03  00  00|Open|Open
1444 |03  01  01|Close|Close
1445 |03  01  00|Close|Open
1446 |03  00  01|Open|Close
1447 )))
1448
1449 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1450
1451
1452 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1453
1454 Controls the relay output time.
1455
1456 * (% style="color:#037691" %)**AT Command:**
1457
1458 There is no AT Command to control Relay Output
1459
1460
1461 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1462
1463 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1464
1465
1466 This is to control the relay output time. It includes four bytes:
1467
1468 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1469
1470 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1471
1472 01: Relays will change back to their original state after timeout.
1473
1474 00: Relays will change to the inverter state after timeout.
1475
1476
1477 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1478
1479 [[image:image-20221008095908-1.png||height="364" width="564"]]
1480
1481
1482 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1483
1484
1485 (% style="color:red" %)**Note:**
1486
1487 Since firmware v1.6.0, the latch time supports both 4 bytes and 2 bytes.
1488
1489 Before firmware v1.6.0, the latch time only supported 2 bytes.
1490
1491
1492 (% style="color:red" %)**Device will upload a packet if the downlink code executes successfully.**
1493
1494
1495 **Example payload:**
1496
1497 **~1. 05 01 11 07 D0**
1498
1499 Relay1 and Relay2 will be set to NC, lasting 2 seconds, then revert to their original state
1500
1501 **2. 05 01 10 07 D0**
1502
1503 Relay1 will change to NC, Relay2 will change to NO, lasting 2 seconds, then both will revert to their original state.
1504
1505 **3. 05 00 01 07 D0**
1506
1507 Relay1 will change to NO, Relay2 will change to NC, lasting 2 seconds, then Relay1 will change to NC, and Relay2 will change to NO.
1508
1509 **4. 05 00 00 07 D0**
1510
1511 Relay1 and Relay2 will change to NO, lasting 2 seconds, then both will change to NC.
1512
1513
1514
1515 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1516
1517
1518 When the voltage exceeds the threshold, counting begins. For details, see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1519
1520 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1521
1522 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1523
1524 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1525
1526
1527 (% style="color:#037691" %)**AT Command**
1528
1529 (% border="2" style="width:500px" %)
1530 |(% style="width:137px" %)**Command**|(% style="width:361px" %)AT+VOLMAX=<voltage><logic>
1531 |(% style="width:137px" %)**Response**|(% style="width:361px" %)
1532 |(% style="width:137px" %)**Parameters**|(% style="width:361px" %)(((
1533 **voltage** : voltage threshold in mV
1534
1535 **logic**:
1536
1537 0 : lower than
1538
1539 1: higher than
1540
1541 if you leave logic parameter blank, it is considered 0
1542 )))
1543 |(% style="width:137px" %)**Examples**|(% style="width:361px" %)(((
1544 AT+VOLMAX=20000
1545
1546 If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1
1547
1548 AT+VOLMAX=20000,0
1549
1550 If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1
1551
1552 AT+VOLMAX=20000,1
1553
1554 If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1
1555 )))
1556
1557 (% style="color:#037691" %)**Downlink Payload**
1558
1559 (% border="2" style="width:500px" %)
1560 |(% style="width:140px" %)**Payload**|(% style="width:358px" %)<prefix><voltage><logic>
1561 |(% style="width:140px" %)**Parameters**|(% style="width:358px" %)(((
1562 **prefix** : A5 (hex)
1563
1564 **voltage** : voltage threshold in mV (2 bytes in hex)
1565
1566 **logic**: (1 byte in hexadecimal)
1567
1568 0 : lower than
1569
1570 1: higher than
1571
1572 if you leave logic parameter blank, it is considered 1 (higher than)
1573 )))
1574 |(% style="width:140px" %)**Example**|(% style="width:358px" %)(((
1575 A5 **4E 20**
1576
1577 If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1
1578
1579 A5 **4E 20 00**
1580
1581 If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1
1582
1583 A5 **4E 20 01**
1584
1585 If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1
1586 )))
1587
1588 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1589
1590 This feature allows users to pre-configure specific count numbers for various counting parameters such as Count1, Count2, or AVI1 Count. Use the AT command to set the desired count number for each configuration.
1591
1592 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1593
1594 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1595
1596 (% style="color:red" %)**bb cc dd ee: **(%%)The number to be set
1597
1598
1599 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1600
1601 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1602
1603
1604 (% style="color:#037691" %)**AT Command**
1605
1606 (% border="2" style="width:500px" %)
1607 |(% style="width:134px" %)**Command**|(% style="width:364px" %)AT+SETCNT=<counting_parameter><number>
1608 |(% style="width:134px" %)**Response**|(% style="width:364px" %)
1609 |(% style="width:134px" %)**Parameters**|(% style="width:364px" %)(((
1610 **counting_parameter** :
1611
1612 1: COUNT1
1613
1614 2: COUNT2
1615
1616 3: AVI1 Count
1617
1618 **number** : Start number
1619 )))
1620 |(% style="width:134px" %)**Example**|(% style="width:364px" %)(((
1621 AT+SETCNT=1,10
1622
1623 Sets the COUNT1 to 10.
1624 )))
1625
1626 (% style="color:#037691" %)**Downlink Payload**
1627
1628 (% border="2" style="width:500px" %)
1629 |(% style="width:135px" %)**Payload**|(% style="width:363px" %)<prefix><counting_parameter><number>
1630 |(% style="width:135px" %)**Parameters**|(% style="width:363px" %)(((
1631 prefix : A8 (hex)
1632
1633 **counting_parameter** : (1 byte in hexadecimal)
1634
1635 1: COUNT1
1636
1637 2: COUNT2
1638
1639 3: AVI1 Count
1640
1641 **number** : Start number, 4 bytes in hexadecimal
1642 )))
1643 |(% style="width:135px" %)**Example**|(% style="width:363px" %)(((
1644 A8 **01 00 00 00 0A**
1645
1646 Sets the COUNT1 to 10.
1647 )))
1648
1649 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1650
1651 This feature clears the counting in counting mode.
1652
1653 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+CLRCOUNT         **(%%) ~/~/ clear all counting
1654
1655 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1656
1657 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1658
1659 (% style="color:#037691" %)**AT Command**
1660
1661 (% border="2" style="width:500px" %)
1662 |(% style="width:142px" %)**Command**|(% style="width:356px" %)AT+CLRCOUNT
1663 |(% style="width:142px" %)**Response**|(% style="width:356px" %)-
1664
1665 (% style="color:#037691" %)**Downlink Payload**
1666
1667 (% border="2" style="width:500px" %)
1668 |(% style="width:141px" %)**Payload**|(% style="width:357px" %)<prefix><clear?>
1669 |(% style="width:141px" %)**Parameters**|(% style="width:357px" %)(((
1670 prefix : A6 (hex)
1671
1672 clear? : 01 (hex)
1673 )))
1674 |(% style="width:141px" %)**Example**|(% style="width:357px" %)A6 **01**
1675
1676 ==== 3.4.2.19 Counting ~-~- Change counting mode to save time ====
1677
1678 This feature allows you to configure the device to save its counting result to internal flash memory at specified intervals. By setting a save time, the device will periodically store the counting data to prevent loss in case of power failure. The save interval can be adjusted to suit your requirements, with a minimum value of 30 seconds.
1679
1680 * (% style="color:#037691" %)**AT Command:**
1681
1682 (% style="color:blue" %)**AT+COUTIME=60  **(%%)~/~/ Sets the save time to 60 seconds. The device will save the counting result in internal flash every 60 seconds. (Min value: 30 seconds)
1683
1684
1685 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1686
1687 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1688
1689 (((
1690 Range: aa bb cc:0 to 16777215,  (unit: seconds)
1691 )))
1692
1693
1694
1695 ==== 3.4.2.20 Reset save RO DO state ====
1696
1697 This feature allows you to reset the saved relay output (RO) and digital output (DO) states when the device joins the network. By configuring this setting, you can control whether the device should retain or reset the relay states after a reset and rejoin to the network.
1698
1699 * (% style="color:#037691" %)**AT Command:**
1700
1701 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1702
1703 (% style="color:blue" %)**AT+RODORESET=0    **(%%)~/~/ After the device is reset, the previously saved RODO state (only MOD2 to MOD5) is read, and its state will not change when the device reconnects to the network.
1704
1705
1706 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1707
1708 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1709
1710
1711
1712 ==== 3.4.2.21 Encrypted payload ====
1713
1714 This feature allows you to configure whether the device should upload data in an encrypted format or in plaintext. By default, the device encrypts the payload before uploading. You can toggle this setting to either upload encrypted data or transmit it without encryption.
1715
1716 * (% style="color:#037691" %)**AT Command:**
1717
1718 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1719
1720 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1721
1722
1723
1724 ==== 3.4.2.22 Get sensor value ====
1725
1726
1727 * (% style="color:#037691" %)**AT Command:**
1728
1729 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port retrieves the reading of the current sensor.
1730
1731 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port retrieves the current sensor reading and uploads it.
1732
1733
1734
1735 ==== 3.4.2.23 Resets the downlink packet count ====
1736
1737
1738 * (% style="color:#037691" %)**AT Command:**
1739
1740 (% style="color:blue" %)**AT+DISFCNTCHECK=0   **(%%)~/~/ When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node will no longer receive downlink packets (default)
1741
1742 (% style="color:blue" %)**AT+DISFCNTCHECK=1   **(%%)~/~/ When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node resets the downlink packet count and keeps it consistent with the server downlink packet count.
1743
1744
1745
1746 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1747
1748
1749 * (% style="color:#037691" %)**AT Command:**
1750
1751 (% style="color:blue" %)**AT+DISMACANS=0**   (%%) ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of 11 bytes (DR0 of US915, DR2 of AS923, DR2 of AU195), the node will send a packet with a payload of 00 and a port of 4. (default)
1752
1753 (% style="color:blue" %)**AT+DISMACANS=1**  (%%) ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of the DR, the node will ignore the MACANS and not reply, and only upload the payload part.
1754
1755
1756 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1757
1758 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1759
1760
1761
1762 ==== 3.4.2.25 Copy downlink to uplink ====
1763
1764
1765 * (% style="color:#037691" %)**AT Command**(%%)**:**
1766
1767 (% style="color:blue" %)**AT+RPL=5**   (%%) ~/~/ After receiving the package from the server, it will immediately upload the content of the package to the server, the port number is 100.
1768
1769 Example：**aa xx xx xx xx**         ~/~/ aa indicates whether the configuration has changed, 00 is yes, 01 is no; xx xx xx xx are the bytes sent.
1770
1771
1772 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173747-6.png?width=1124&height=165&rev=1.1||alt="image-20220823173747-6.png"]]
1773
1774 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1775
1776
1777
1778 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173833-7.png?width=1124&height=149&rev=1.1||alt="image-20220823173833-7.png"]]
1779
1780 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1781
1782
1783
1784 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1785
1786
1787 * (((
1788 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1789
1790 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1791
1792
1793 )))
1794
1795 **Example：**
1796
1797 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173929-8.png?width=1205&height=76&rev=1.1||alt="image-20220823173929-8.png"]]
1798
1799
1800 == 3.5 Integrating with ThingsEye.io ==
1801
1802 The Things Stack application supports integration with ThingsEye.io. Once integrated, ThingsEye.io acts as an MQTT client for The Things Stack MQTT broker, allowing it to subscribe to upstream traffic and publish downlink traffic.
1803
1804 === 3.5.1 Configuring The Things Stack ===
1805
1806 We use The Things Stack Sandbox in this example:
1807
1808 * In **The Things Stack Sandbox**, go to the **Application **for the LT-22222-L you added.
1809 * Select **MQTT** under **Integrations** in the left menu.
1810 * In the **Connection information **section, under **Connection credentials**, The Things Stack displays an auto-generated **username**. You can use it or provide a new one.
1811 * Click the **Generate new API key** button to generate a password. You can view it by clicking on the **visibility toggle/eye** icon. The API key works as the password.
1812
1813 {{info}}
1814 The username and  password (API key) you created here are required in the next section.
1815 {{/info}}
1816
1817 [[image:tts-mqtt-integration.png||height="625" width="1000"]]
1818
1819 === 3.5.2 Configuring ThingsEye.io ===
1820
1821 * Login to your [[ThingsEye.io >>https://thingseye.io]]account.
1822 * Under the **Integrations center**, click **Integrations**.
1823 * Click the **Add integration** button (the button with the **+** symbol).
1824
1825 [[image:thingseye-io-step-1.png||height="625" width="1000"]]
1826
1827
1828 On the **Add integration** window, configure the following:
1829
1830 **Basic settings:**
1831
1832 * Select **The Things Stack Community** from the **Integration type** list.
1833 * Enter a suitable name for your integration in the **Name **text** **box or keep the default name.
1834 * Ensure the following options are turned on.
1835 ** Enable integration
1836 ** Debug mode
1837 ** Allow create devices or assets
1838 * Click the **Next** button. you will be navigated to the **Uplink data converter** tab.
1839
1840 [[image:thingseye-io-step-2.png||height="625" width="1000"]]
1841
1842
1843 **Uplink data converter:**
1844
1845 * Click the **Create new** button if it is not selected by default.
1846 * Enter a suitable name for the uplink data converter in the **Name **text** **box or keep the default name.
1847 * Click the **JavaScript** button.
1848 * Paste the uplink decoder function into the text area (first, delete the default code). The demo uplink decoder function can be found [[here>>https://raw.githubusercontent.com/ThingsEye-io/te-platform/refs/heads/main/Data%20Converters/The_Things_Network_MQTT_Uplink_Converter.js]].
1849 * Click the **Next** button. You will be navigated to the **Downlink data converter **tab.
1850
1851 [[image:thingseye-io-step-3.png||height="625" width="1000"]]
1852
1853
1854 **Downlink data converter (this is an optional step):**
1855
1856 * Click the **Create new** button if it is not selected by default.
1857 * Enter a suitable name for the downlink data converter in the **Name **text** **box or keep the default name.
1858 * Click the **JavaScript** button.
1859 * Paste the downlink decoder function into the text area (first, delete the default code). The demo downlink decoder function can be found [[here>>https://raw.githubusercontent.com/ThingsEye-io/te-platform/refs/heads/main/Data%20Converters/The_Things_Network_MQTT_Downlink_Converter.js]].
1860 * Click the **Next** button. You will be navigated to the **Connection** tab.
1861
1862 [[image:thingseye-io-step-4.png||height="625" width="1000"]]
1863
1864
1865 **Connection:**
1866
1867 * Choose **Region** from the **Host type**.
1868 * Enter the **cluster** of your **The Things Stack** in the **Region** textbox. You can find the cluster in the url (e.g., https:~/~/**eu1**.cloud.thethings.network/...).
1869 * Enter the **Username** and **Password** of the MQTT integration in the **Credentials** section. The **username **and **password **can be found on the MQTT integration page of your The Things Stack account (see Configuring The Things Stack).
1870 * Click the **Check connection** button to test the connection. If the connection is successful, you will see the message saying **Connected**.
1871
1872 [[image:message-1.png]]
1873
1874
1875 * Click the **Add** button.
1876
1877 [[image:thingseye-io-step-5.png||height="625" width="1000"]]
1878
1879
1880 Your integration has been added to the** Integrations** list and will be displayed on the **Integrations** page. Check whether the status is shown as **Active**. If not, review your configuration settings.
1881
1882
1883 [[image:thingseye.io_integrationsCenter_integrations.png||height="686" width="1000"]]
1884
1885
1886 ==== 3.5.2.1 Viewing integration details ====
1887
1888 Click on your integration from the list. The **Integration details** window will appear with the **Details **tab selected. The **Details **tab shows all the settings you have provided for this integration.
1889
1890 [[image:integration-details.png||height="686" width="1000"]]
1891
1892
1893 If you want to edit the settings you have provided, click on the **Toggle edit mode** button. Once you have done click on the **Apply changes **button.
1894
1895 {{info}}
1896 See also ThingsEye documentation.
1897 {{/info}}
1898
1899 ==== **3.5.2.2 Viewing events** ====
1900
1901 The **Events **tab displays all the uplink messages from the LT-22222-L.
1902
1903 * Select **Debug **from the **Event type** dropdown.
1904 * Select the** time frame** from the **time window**.
1905
1906 [[image:thingseye-events.png||height="686" width="1000"]]
1907
1908
1909 * To view the JSON payload of a message, click on the three dots (...) in the Message column of the desired message.
1910
1911 [[image:thingseye-json.png||width="1000"]]
1912
1913
1914 ==== **3.5.2.3 Deleting an integration** ====
1915
1916 If you want to delete an integration, click the **Delete integratio**n button on the Integrations page.
1917
1918
1919 == 3.6 Interface Details ==
1920
1921 === 3.6.1 Digital Input Ports: DI1/DI2/DI3 (For LT-33222-L, Low Active) ===
1922
1923
1924 Supports NPN-type sensors.
1925
1926 [[image:1653356991268-289.png]]
1927
1928
1929 === 3.6.2 Digital Input Ports: DI1/DI2 ===
1930
1931
1932 (((
1933 The DI ports of the LT-22222-L can support **NPN**, **PNP**, or **dry contact** output sensors.
1934 )))
1935
1936 (((
1937 (((
1938 The part of the internal circuit of the LT-22222-L shown below includes the NEC2501 photocoupler. The active current from NEC2501 pin 1 to pin 2 is 1 mA, with a maximum allowable current of 50 mA. When active current flows from NEC2501 pin 1 to pin 2, the DI becomes active HIGH and the DI LED status changes.
1939
1940
1941 )))
1942 )))
1943
1944 [[image:1653357170703-587.png]]
1945
1946 (((
1947 (((
1948 (% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)When connecting a device to the DI port, both DI1+ and DI1- must be connected.
1949 )))
1950 )))
1951
1952 (((
1953
1954 )))
1955
1956 (((
1957 (% style="color:#0000ff" %)**Example 1**(%%): Connecting to a low-active sensor.
1958 )))
1959
1960 (((
1961 This type of sensor outputs a low (GND) signal when active.
1962 )))
1963
1964 * (((
1965 Connect the sensor's output to DI1-
1966 )))
1967 * (((
1968 Connect the sensor's VCC to DI1+.
1969 )))
1970
1971 (((
1972 When the sensor is active, the current between NEC2501 pin 1 and pin 2 will be：
1973 )))
1974
1975 (((
1976 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1977 )))
1978
1979 (((
1980 For example, if** DI1+ **= **12V**, the resulting current is [[image:1653968155772-850.png||height="23" width="19"]]= 12mA. Therefore, the LT-22222-L will be able to detect this active signal.
1981 )))
1982
1983 (((
1984
1985 )))
1986
1987 (((
1988 (% style="color:#0000ff" %)**Example 2**(%%): Connecting to a high-active sensor.
1989 )))
1990
1991 (((
1992 This type of sensor outputs a high signal (e.g., 24V) when active.
1993 )))
1994
1995 * (((
1996 Connect the sensor's output to DI1+
1997 )))
1998 * (((
1999 Connect the sensor's GND DI1-.
2000 )))
2001
2002 (((
2003 When the sensor is active, the current between NEC2501 pin1 and pin2 will be:
2004 )))
2005
2006 (((
2007 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
2008 )))
2009
2010 (((
2011 If **DI1+ = 24V**, the resulting current[[image:1653968155772-850.png||height="23" width="19"]] is 24mA, Therefore, the LT-22222-L will detect this high-active signal.
2012 )))
2013
2014 (((
2015
2016 )))
2017
2018 (((
2019 (% style="color:#0000ff" %)**Example 3**(%%): Connecting to a 220V high-active sensor.
2020 )))
2021
2022 (((
2023 Assume that you want to monitor an active signal higher than 220V without damaging the photocoupler  
2024 )))
2025
2026 * (((
2027 Connect the sensor's output to DI1+ with a 50K resistor in series.
2028 )))
2029 * (((
2030 Connect the sensor's GND DI1-.
2031 )))
2032
2033 (((
2034 When the sensor is active, the current between NEC2501 pin1 and pin2 will be:
2035 )))
2036
2037 (((
2038 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
2039 )))
2040
2041 (((
2042 If the sensor output is 220V, then [[image:1653968155772-850.png||height="23" width="19"]](% id="cke_bm_243359S" style="display:none" wfd-invisible="true" %)[[image:image-20220524095628-8.png]](%%) = DI1+ / 51K  = 4.3mA. Therefore, the LT-22222-L will be able to safely detect this high-active signal.
2043 )))
2044
2045
2046 (% style="color:blue" %)**Example4**(%%): Connecting to Dry Contact sensor
2047
2048 From the DI port circuit above, you can see that activating the photocoupler requires a voltage difference between the DI+ and DI- ports. However, the Dry Contact sensor is a passive component and cannot provide this voltage difference.
2049
2050 To detect a Dry Contact, you can supply a power source to one pin of the Dry Contact. Below is a reference circuit diagram.
2051
2052 [[image:image-20230616235145-1.png]]
2053
2054 (% style="color:blue" %)**Example5**(%%): Connecting to an Open Collector
2055
2056 [[image:image-20240219115718-1.png]]
2057
2058
2059 === 3.6.3 Digital Output Ports: DO1/DO2 ===
2060
2061
2062 (% style="color:blue" %)**NPN output**(%%): GND or Float. The maximum voltage that can be applied to the output pin is 36V.
2063
2064 (% style="color:red" %)**Note: The DO pins will float when the device is powered off.**
2065
2066 [[image:1653357531600-905.png]]
2067
2068
2069 === 3.6.4 Analog Input Interfaces ===
2070
2071
2072 The analog input interface is shown below. The LT-22222-L will measure the IN2 voltage to calculate the current passing through the load. The formula is:
2073
2074
2075 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
2076
2077 [[image:1653357592296-182.png]]
2078
2079 Example: Connecting a 4~~20mA sensor
2080
2081 We will use the wind speed sensor as an example for reference only.
2082
2083
2084 (% style="color:blue" %)**Specifications of the wind speed sensor:**
2085
2086 (% style="color:red" %)**Red:  12~~24V**
2087
2088 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
2089
2090 **Black:  GND**
2091
2092 **Connection diagram:**
2093
2094 [[image:1653357640609-758.png]]
2095
2096 [[image:1653357648330-671.png||height="155" width="733"]]
2097
2098
2099 Example: Connecting to a regulated power supply to measure voltage
2100
2101 [[image:image-20230608101532-1.png||height="606" width="447"]]
2102
2103 [[image:image-20230608101608-2.jpeg||height="379" width="284"]]
2104
2105 [[image:image-20230608101722-3.png||height="102" width="1139"]]
2106
2107
2108 (% style="color:blue; font-weight:bold" %)**Specifications of the regulated power supply**(% style="color:blue" %)**:**
2109
2110 (% style="color:red" %)**Red:  12~~24v**
2111
2112 **Black:  GND**
2113
2114
2115 === 3.6.5 Relay Output ===
2116
2117
2118 (((
2119 The LT-22222-L has two relay interfaces, RO1 and RO2, each using two pins of the screw terminal (ROx-1 and ROx-2 where x is the port number, 1 or 2). You can connect a device's power line in series with one of the relay interfaces (e.g., RO1-1 and RO1-2 screw terminals). See the example below:
2120
2121 **Note**: The ROx pins will be in the Open (NO) state when the LT-22222-L is powered off.
2122 )))
2123
2124 [[image:image-20220524100215-9.png]]
2125
2126
2127 [[image:image-20220524100215-10.png||height="382" width="723"]]
2128
2129
2130 == 3.7 LEDs Indicators ==
2131
2132 The table below lists the behavior of LED indicators for each port function.
2133
2134 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
2135 |(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:460px" %)**Feature**
2136 |**PWR**|Always on when there is power
2137 |**TX**|(((
2138 (((
2139 Device boot: TX blinks 5 times.
2140 )))
2141
2142 (((
2143 Successful network join: TX remains ON for 5 seconds.
2144 )))
2145
2146 (((
2147 Transmit a LoRa packet: TX blinks once
2148 )))
2149 )))
2150 |**RX**|RX blinks once when a packet is received.
2151 |**DO1**|For LT-22222-L: ON when DO1 is low, OFF when DO1 is high
2152 |**DO2**|For LT-22222-L: ON when DO2 is low, OFF when DO2 is high
2153 |**DI1**|(((
2154 For LT-22222-L: ON when DI1 is high, OFF when DI1 is low
2155 )))
2156 |**DI2**|(((
2157 For LT-22222-L: ON when DI2 is high, OFF when DI2 is low
2158 )))
2159 |**RO1**|For LT-22222-L: ON when RO1 is closed, OFF when RO1 is open
2160 |**RO2**|For LT-22222-L: ON when RO2 is closed, OFF when RO2 is open
2161
2162 = 4. Using AT Commands =
2163
2164 The LT-22222-L supports programming using AT Commands.
2165
2166 == 4.1 Connecting the LT-22222-L to a PC ==
2167
2168 (((
2169 You can use a USB-to-TTL adapter along with a 3.5mm Program Cable to connect the LT-22222-L to a PC, as shown below.
2170
2171 [[image:usb-ttl-programming.png]]
2172 )))
2173
2174
2175
2176 (((
2177 On the PC, you need to set the (% style="color:#4f81bd" %)**serial tool **(%%)(such as [[PuTTY>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]] or [[SecureCRT>>https://www.vandyke.com/cgi-bin/releases.php?product=securecrt]]) to a baud rate of (% style="color:green" %)**9600**(%%) to access the serial console of LT-22222-L. Access to AT commands is disabled by default, and a password (default: (% style="color:green" %)**123456**)(%%) must be entered to enable AT command access, as shown below:
2178 )))
2179
2180 [[image:1653358355238-883.png]]
2181
2182
2183 (((
2184 You can find more details in the [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2185
2186 == 4.2 LT-22222-L related AT commands ==
2187 )))
2188
2189 (((
2190 The following is the list of all the AT commands related to the LT-22222-L, except for those used for switching between working modes.
2191
2192 * **##AT##+<CMD>?** : Help on <CMD>
2193 * **##AT##+<CMD>** : Run <CMD>
2194 * **##AT##+<CMD>=<value>** : Set the value
2195 * **##AT##+<CMD>=?** : Get the value
2196 * ##**ATZ**##: Trigger a reset of the MCU
2197 * ##**AT+FDR**##: Reset Parameters to factory default, reserve keys 
2198 * **##AT+DEUI##**: Get or set the Device EUI (DevEUI)
2199 * **##AT+DADDR##**: Get or set the Device Address (DevAddr)
2200 * **##AT+APPKEY##**: Get or set the Application Key (AppKey)
2201 * ##**AT+NWKSKEY**##: Get or set the Network Session Key (NwkSKey)
2202 * **##AT+APPSKEY##**: Get or set the Application Session Key (AppSKey)
2203 * **##AT+APPEUI##**: Get or set the Application EUI (AppEUI)
2204 * **##AT+ADR##**: Get or set the Adaptive Data Rate setting. (0: OFF, 1: ON)
2205 * AT+TXP: Get or set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Specification)
2206 * AT+DR:  Get or set the Data Rate. (0-7 corresponding to DR_X)  
2207 * AT+DCS: Get or set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
2208 * AT+PNM: Get or set the public network mode. (0: off, 1: on)
2209 * AT+RX2FQ: Get or set the Rx2 window frequency
2210 * AT+RX2DR: Get or set the Rx2 window data rate (0-7 corresponding to DR_X)
2211 * AT+RX1DL: Get or set the delay between the end of the Tx and the Rx Window 1 in ms
2212 * AT+RX2DL: Get or set the delay between the end of the Tx and the Rx Window 2 in ms
2213 * AT+JN1DL: Get or set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
2214 * AT+JN2DL: Get or set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
2215 * AT+NJM: Get or set the Network Join Mode. (0: ABP, 1: OTAA)
2216 * AT+NWKID: Get or set the Network ID
2217 * AT+FCU: Get or set the Frame Counter Uplink (FCntUp)
2218 * AT+FCD: Get or set the Frame Counter Downlink (FCntDown)
2219 * AT+CLASS: Get or set the Device Class
2220 * AT+JOIN: Join network
2221 * AT+NJS: Get OTAA Join Status
2222 * AT+SENDB: Send hexadecimal data along with the application port
2223 * AT+SEND: Send text data along with the application port
2224 * AT+RECVB: Print last received data in binary format (with hexadecimal values)
2225 * AT+RECV: Print last received data in raw format
2226 * AT+VER: Get current image version and Frequency Band
2227 * AT+CFM: Get or Set the confirmation mode (0-1)
2228 * AT+CFS: Get confirmation status of the last AT+SEND (0-1)
2229 * AT+SNR: Get the SNR of the last received packet
2230 * AT+RSSI: Get the RSSI of the last received packet
2231 * AT+TDC: Get or set the application data transmission interval in ms
2232 * AT+PORT: Get or set the application port
2233 * AT+DISAT: Disable AT commands
2234 * AT+PWORD: Set password, max 9 digits
2235 * AT+CHS: Get or set the Frequency (Unit: Hz) for Single Channel Mode
2236 * AT+CHE: Get or set eight channels mode, Only for US915, AU915, CN470
2237 * AT+CFG: Print all settings
2238 )))
2239
2240
2241 == 4.2 Common AT Command Sequence ==
2242
2243 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
2244
2245 (((
2246
2247
2248 (((
2249 (% style="color:blue" %)**If the device has not yet joined the network:**
2250 )))
2251 )))
2252
2253 (((
2254 (% style="background-color:#dcdcdc" %)##**123456 ~/~/Enter the password to enable AT commands access**##
2255 )))
2256
2257 (((
2258 (% style="background-color:#dcdcdc" %)##**AT+FDR ~/~/Reset parameters to factory default, Reserve keys**##
2259 )))
2260
2261 (((
2262 (% style="background-color:#dcdcdc" %)##**123456 ~/~/Enter the password to enable AT commands access**##
2263 )))
2264
2265 (((
2266 (% style="background-color:#dcdcdc" %)##**AT+NJM=0 ~/~/Set to ABP mode**##
2267 )))
2268
2269 (((
2270 (% style="background-color:#dcdcdc" %)##**ATZ ~/~/Reset MCU**##
2271 )))
2272
2273
2274 (((
2275 (% style="color:blue" %)**If the device has already joined the network:**
2276 )))
2277
2278 (((
2279 (% style="background-color:#dcdcdc" %)##**AT+NJM=0**##
2280 )))
2281
2282 (((
2283 (% style="background-color:#dcdcdc" %)##**ATZ**##
2284 )))
2285
2286
2287 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
2288
2289 (((
2290
2291
2292 (((
2293 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter password to enable AT commands access
2294 )))
2295 )))
2296
2297 (((
2298 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset parameters to Factory Default, Reserve keys
2299 )))
2300
2301 (((
2302 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter password to enable AT commands access
2303 )))
2304
2305 (((
2306 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to CLASS C mode
2307 )))
2308
2309 (((
2310 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
2311 )))
2312
2313 (((
2314 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
2315 )))
2316
2317 (((
2318 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
2319 )))
2320
2321 (((
2322 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
2323 )))
2324
2325 (((
2326 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4 MHz
2327 )))
2328
2329 (((
2330 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2 frequency to 868.4 MHz (according to the result from the server)
2331 )))
2332
2333 (((
2334 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2 DR to match the downlink DR from the server. See below.
2335 )))
2336
2337 (((
2338 (% style="background-color:#dcdcdc" %)** AT+DADDR=26 01 1A F1** (%%) ~/~/ Set Device Address. The Device Address can be found in the application on the LoRaWAN NS.
2339 )))
2340
2341 (((
2342 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2343
2344
2345 )))
2346
2347 (((
2348 (% style="color:red" %)**Note:**
2349 )))
2350
2351 (((
2352 **~1. Ensure that the device is set to ABP mode in the LoRaWAN Network Server.**
2353
2354 **2. Verify that the LG01/02 gateway RX frequency matches the AT+CHS setting exactly.**
2355
2356 **3. Make sure the SF/bandwidth settings in the LG01/LG02 match the settings of AT+DR. Refer to [[this link>>url:http://www.dragino.com/downloads/index.php?
2357 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2358
2359 **4. The commands AT+RX2FQ and AT+RX2DR enable downlink functionality. To set the correct parameters, you can check the actual downlink parameters to be used as shown below. Here, RX2FQ should be set to 868400000 and RX2DR should be set to 5.**
2360 )))
2361
2362 (((
2363 [[image:1653359097980-169.png||height="188" width="729"]]
2364 )))
2365
2366
2367 === 4.2.3 Change to Class A ===
2368
2369
2370 (((
2371 (% style="color:blue" %)**If the sensor has JOINED:**
2372
2373 (% style="background-color:#dcdcdc" %)**AT+CLASS=A**
2374
2375 (% style="background-color:#dcdcdc" %)**ATZ**
2376 )))
2377
2378
2379 = 5. Case Study =
2380
2381 == 5.1 Counting how many objects pass through the flow line ==
2382
2383 See [[How to set up to setup counting for objects passing through the flow line>>How to set up to count objects pass in flow line]]?
2384
2385
2386 = 6. FAQ =
2387
2388 This section contains some frequently asked questions, which can help you resolve common issues and find solutions quickly.
2389
2390
2391 == 6.1 How to update the firmware? ==
2392
2393 Dragino frequently releases firmware updates for the LT-22222-L. Updating your LT-22222-L with the latest firmware version helps to:
2394
2395 * Support new features
2396 * Fix bugs
2397 * Change LoRaWAN frequency bands
2398
2399 You will need the following things before proceeding:
2400
2401 * 3.5mm programming cable (included with the LT-22222-L as an additional accessory)
2402 * USB to TTL adapter
2403 * Download and install the [[STM32 Flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]]. (replaced by STM32CubeProgrammer)
2404 * Download the latest firmware image from [[LT-22222-L firmware image files>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AACrbrDN0AqLHbBat0ViWx5Da/LT-22222-L/Firmware?dl=0&subfolder_nav_tracking=1]]. Check the file name of the firmware to find the correct region.
2405
2406 {{info}}
2407 As of this writing, the latest firmware version available for the LT-22222-L is v1.6.1.
2408 {{/info}}
2409
2410 Below is the hardware setup for uploading a firmware image to the LT-22222-L:
2411
2412 [[image:usb-ttl-programming.png]]
2413
2414
2415
2416 Start the STM32 Flash Loader and choose the correct COM port to update.
2417
2418 (((
2419 (((
2420 (% style="color:blue" %)**For LT-22222-L**(%%):
2421
2422 Hold down the **PRO** button, then briefly press the **RST** button. The **DO1** LED will change from OFF to ON. When the **DO1** LED is ON, it indicates that the device is in firmware download mode.
2423 )))
2424
2425
2426 )))
2427
2428 [[image:image-20220524103407-12.png]]
2429
2430
2431 [[image:image-20220524103429-13.png]]
2432
2433
2434 [[image:image-20220524104033-15.png]]
2435
2436
2437 (% style="color:red" %)**Note**(%%): If you have lost the programming cable, you can make one from a 3.5 mm cable. The pin mapping is as follows:
2438
2439 [[image:1653360054704-518.png||height="186" width="745"]]
2440
2441
2442 (((
2443 (((
2444 == 6.2 How to change the LoRaWAN frequency band/region? ==
2445 )))
2446 )))
2447
2448 (((
2449 You can follow the introductions on [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When downloading, select the required image file.
2450 )))
2451
2452 (((
2453
2454
2455 == 6.3 How to setup LT-22222-L to work with a Single Channel Gateway, such as LG01/LG02? ==
2456 )))
2457
2458 (((
2459 (((
2460 In this case, you need to set the LT-22222-L to work in ABP mode and transmit on only one frequency.
2461 )))
2462 )))
2463
2464 (((
2465 (((
2466 We assume you have an LG01/LG02 working on the frequency 868400000. Below are the steps.
2467
2468
2469 )))
2470 )))
2471
2472 (((
2473 (% style="color:#0000ff" %)**Step 1**(%%): Log in to The Things Stack Sandbox account and create an ABP device in the application. To do this, use the manual registration option as explained in section 3.2.2.2, //Adding a Device Manually//. Select //Activation by Personalization (ABP)// under Activation Mode. Enter the DevEUI exactly as shown on the registration information sticker, then generate the Device Address, Application Session Key (AppSKey), and Network Session Key (NwkSKey).
2474
2475 [[image:lt-22222-l-abp.png||height="686" width="1000"]]
2476 )))
2477
2478 (((
2479
2480 )))
2481
2482 {{warning}}
2483 Ensure that the Device Address (DevAddr) and the two keys match between the LT-22222-L and The Things Stack. You can modify them either in The Things Stack or on the LT-22222-L to make them align. In The Things Stack, you can configure the NwkSKey and AppSKey on the settings page, but note that the Device Address is generated by The Things Stack.
2484 {{/warning}}
2485
2486
2487 (((
2488 (% style="color:blue" %)**Step 2**(%%)**:  **(% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)Run AT commands to configure the LT-22222-L to operate in single-frequency and ABP mode. The AT commands are as follows:
2489
2490
2491 )))
2492
2493 (((
2494 (% style="background-color:#dcdcdc" %)**123456** (%%) : Enter the password to enable AT access.
2495
2496 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%) : Reset parameters to factory default, keeping keys reserved.
2497
2498 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) : Set to ABP mode.
2499
2500 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) : Disable the Adaptive Data Rate (ADR).
2501
2502 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) : Set Data Rate (Use AT+DR=3 for the 915 MHz band).
2503
2504 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) : Set transmit interval to 60 seconds.
2505
2506 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4 MHz.
2507
2508 (% style="background-color:#dcdcdc" %)**AT+DADDR=xxxx**(%%) : Set the Device Address (DevAddr)
2509
2510 (% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:700; text-decoration:none; white-space:pre-wrap" %)**AT+APPKEY=xxxx**(% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %): Get or set the Application Key (AppKey)
2511
2512 (% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)**AT+NWKSKEY=xxxx**: Get or set the Network Session Key (NwkSKey)
2513
2514 (% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)**AT+APPSKEY=xxxx**: Get or set the Application Session Key (AppSKey)
2515
2516 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) : Reset MCU.
2517 )))
2518
2519
2520 (((
2521 (% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)The following figure shows the screenshot of the command set above, issued using a serial tool:
2522 )))
2523
2524 [[image:1653360498588-932.png||height="485" width="726"]]
2525
2526
2527 == 6.4 How to change the uplink interval? ==
2528
2529 Please see this link: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/]]
2530
2531
2532 == 6.5 Can I see the counting event in the serial output? ==
2533
2534 (((
2535 You can run the AT command **AT+DEBUG** to view the counting event in the serial output. If the firmware is too old and doesn’t support AT+DEBUG, update to the latest firmware first.
2536
2537
2538 == 6.6 Can I use point-to-point communication with LT-22222-L? ==
2539
2540 Yes, you can. Please refer to the [[Point-to-Point Communication of LT-22222-L>>https://wiki.dragino.com/xwiki/bin/view/Main/%20Point%20to%20Point%20Communication%20of%20LT-22222-L/]] page. The firmware that supports point-to-point communication can be found [[here>>https://github.com/dragino/LT-22222-L/releases]].
2541
2542
2543 )))
2544
2545 (((
2546 == 6.7 Why does the relay output default to an open relay after the LT-22222-L is powered off? ==
2547
2548 * If the device is not properly shut down and is directly powered off.
2549 * It will default to a power-off state.
2550 * In modes 2 to 5, the DO/RO status and pulse count are saved to flash memory.
2551 * After a restart, the status before the power failure will be read from flash.
2552
2553 == 6.8 Can I setup LT-22222-L as a NC (Normally Closed) relay? ==
2554
2555 The LT-22222-L's built-in relay is Normally Open (NO). You can use an external relay to achieve a Normally Closed (NC) configuration. The circuit diagram is shown below:
2556
2557
2558 [[image:image-20221006170630-1.png||height="610" width="945"]]
2559
2560
2561 == 6.9 Can the LT-22222-L save the RO state? ==
2562
2563 To enable this feature, the firmware version must be 1.6.0 or higher.
2564
2565
2566 == 6.10 Why does the LT-22222-L always report 15.585V when measuring the AVI? ==
2567
2568 It is likely that the GND is not connected during the measurement, or that the wire connected to the GND is loose.
2569
2570
2571 = 7. Troubleshooting =
2572
2573 This section provides some known troubleshooting tips.
2574
2575
2576 )))
2577
2578 (((
2579 (((
2580 == 7.1 Downlink isn't working. How can I solve this? ==
2581 )))
2582 )))
2583
2584 (((
2585 Please refer to this link for debugging instructions: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2586 )))
2587
2588 (((
2589
2590
2591 == 7.2 Having trouble uploading an image? ==
2592 )))
2593
2594 (((
2595 Please refer to this link for troubleshooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2596 )))
2597
2598 (((
2599
2600
2601 == 7.3 Why can't I join TTN in the US915 /AU915 bands? ==
2602 )))
2603
2604 (((
2605 It might be related to the channel mapping. [[Please refer to this link for details.>>https://github.com/dragino/LT-22222-L/releases]]
2606 )))
2607
2608
2609 == 7.4 Why can the LT-22222-L perform uplink normally, but cannot receive downlink? ==
2610
2611 The FCD count of the gateway is inconsistent with the FCD count of the node, causing the downlink to remain in the queue.
2612 Use this command to synchronize their counts: [[Resets the downlink packet count>>||anchor="H3.4.2.23Resetsthedownlinkpacketcount"]]
2613
2614
2615 = 8. Ordering information =
2616
2617 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2618
2619 (% style="color:#4f81bd" %)**XXX:**
2620
2621 * (% style="color:red" %)**EU433**(%%): LT with frequency bands EU433
2622 * (% style="color:red" %)**EU868**(%%): LT with frequency bands EU868
2623 * (% style="color:red" %)**KR920**(%%): LT with frequency bands KR920
2624 * (% style="color:red" %)**CN470**(%%): LT with frequency bands CN470
2625 * (% style="color:red" %)**AS923**(%%): LT with frequency bands AS923
2626 * (% style="color:red" %)**AU915**(%%): LT with frequency bands AU915
2627 * (% style="color:red" %)**US915**(%%): LT with frequency bands US915
2628 * (% style="color:red" %)**IN865**(%%): LT with frequency bands IN865
2629 * (% style="color:red" %)**CN779**(%%): LT with frequency bands CN779
2630
2631 = 9. Package information =
2632
2633 **Package includes**:
2634
2635 * 1 x LT-22222-L I/O Controller
2636 * 1 x LoRa antenna matched to the frequency of the LT-22222-L
2637 * 1 x bracket for DIN rail mounting
2638 * 1 x 3.5 mm programming cable
2639
2640 **Dimension and weight**:
2641
2642 * Device Size: 13.5 x 7 x 3 cm
2643 * Device Weight: 105 g
2644 * Package Size / pcs : 14.5 x 8 x 5 cm
2645 * Weight / pcs : 170 g
2646
2647 = 10. Support =
2648
2649 * (((
2650 Support is available Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different time zones, we cannot offer live support. However, your questions will be answered as soon as possible within the aforementioned schedule.
2651 )))
2652 * (((
2653 Please provide as much information as possible regarding your inquiry (e.g., product models, a detailed description of the problem, steps to replicate it, etc.) and send an email to [[support@dragino.cc>>mailto:support@dragino.cc]]
2654
2655
2656 )))
2657
2658 = 11. Reference​​​​​ =
2659
2660 * LT-22222-L: [[http:~~/~~/www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html]]
2661 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2662 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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