Version 58.3 by Xiaoling on 2022/05/24 10:32
Show last authors
1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14 = 1.Introduction =
15
16 == 1.1 What is LT Series I/O Controller ==
17
18 (((
19 The Dragino LT series I/O Modules are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as: analog current Input, analog voltage input, relay output, digital input and digital output etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
20 )))
21
22 (((
23 The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
24 )))
25
26 (((
27 The LT I/O Controllers is aiming to provide a simple plug and play, low cost installation by using LoRaWAN wireless technology.
28 )))
29
30 (((
31 The use environment includes:
32 )))
33
34 (((
35 1) If user’s area has LoRaWAN service coverage, they can just install the I/O controller and configure it to connect the LoRaWAN provider via wireless.
36 )))
37
38 (((
39 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
40 )))
41
42 (((
43 [[image:1653295757274-912.png]]
44 )))
45
46 == 1.2  Specifications ==
47
48 **Hardware System:**
49
50 * STM32L072CZT6 MCU
51 * SX1276/78 Wireless Chip 
52 * Power Consumption:
53 ** Idle: 4mA@12v
54 ** 20dB Transmit: 34mA@12v
55
56 **Interface for Model: LT22222-L:**
57
58 * 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
59 * 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
60 * 2 x Relay Output (5A@250VAC / 30VDC)
61 * 2 x 0~~20mA Analog Input (res:0.01mA)
62 * 2 x 0~~30V Analog Input (res:0.01v)
63 * Power Input 7~~ 24V DC. 
64
65 **LoRa Spec:**
66
67 * Frequency Range:
68 ** Band 1 (HF): 862 ~~ 1020 Mhz
69 ** Band 2 (LF): 410 ~~ 528 Mhz
70 * 168 dB maximum link budget.
71 * +20 dBm - 100 mW constant RF output vs.
72 * +14 dBm high efficiency PA.
73 * Programmable bit rate up to 300 kbps.
74 * High sensitivity: down to -148 dBm.
75 * Bullet-proof front end: IIP3 = -12.5 dBm.
76 * Excellent blocking immunity.
77 * Low RX current of 10.3 mA, 200 nA register retention.
78 * Fully integrated synthesizer with a resolution of 61 Hz.
79 * FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
80 * Built-in bit synchronizer for clock recovery.
81 * Preamble detection.
82 * 127 dB Dynamic Range RSSI.
83 * Automatic RF Sense and CAD with ultra-fast AFC.
84 * Packet engine up to 256 bytes with CRC.
85
86 == 1.3 Features ==
87
88 * LoRaWAN Class A & Class C protocol
89 * Optional Customized LoRa Protocol
90 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
91 * AT Commands to change parameters
92 * Remote configure parameters via LoRa Downlink
93 * Firmware upgradable via program port
94 * Counting
95
96 == 1.4  Applications ==
97
98 * Smart Buildings & Home Automation
99 * Logistics and Supply Chain Management
100 * Smart Metering
101 * Smart Agriculture
102 * Smart Cities
103 * Smart Factory
104
105 == 1.5 Hardware Variants ==
106
107 (% border="1" style="background-color:#f7faff; width:500px" %)
108 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
109 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
110 * 2 x Digital Input (Bi-direction)
111 * 2 x Digital Output
112 * 2 x Relay Output (5A@250VAC / 30VDC)
113 * 2 x 0~~20mA Analog Input (res:0.01mA)
114 * 2 x 0~~30V Analog Input (res:0.01v)
115 * 1 x Counting Port
116 )))
117
118 = 2. Power ON Device =
119
120 The LT controller can be powered by 7 ~~ 24V DC power source. Connect VIN to Power Input V+ and GND to power input V- to power the LT controller.
121
122 (((
123 PWR will on when device is properly powered.
124 )))
125
126 [[image:1653297104069-180.png]]
127
128 = 3. Operation Mode =
129
130 == 3.1 How it works? ==
131
132 The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on **TX LED** will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. **TX LED** will be on for 5 seconds after joined in network. When there is message from server, the **RX LED** will be on for 1 second. 
133
134 In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>path:#AT_Command]] to set the keys in the devices.
135
136 3.2 Example to join LoRaWAN network
137
138 This chapter shows an example for how to join the TTN LoRaWAN Network. Below is the network structure, we use our LG308 as LoRaWAN gateway here. 
139
140 [[image:image-20220523172350-1.png||height="266" width="864"]]
141
142
143 (((
144 The LG308 is already set to connect to [[TTN network >>url:https://www.thethingsnetwork.org/]]. So what we need to do now is only configure register this device to TTN:
145 )))
146
147 (((
148 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
149 )))
150
151 (((
152 Each LT is shipped with a sticker with the default device EUI as below:
153 )))
154
155 [[image:1653297924498-393.png]]
156
157 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
158
159 Add APP EUI in the application.
160
161 [[image:1653297955910-247.png||height="321" width="716"]]
162
163 Add APP KEY and DEV EUI
164
165 [[image:1653298023685-319.png]]
166
167 (((
168 **Step 2**: Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.
169 )))
170
171 [[image:1653298044601-602.png||height="405" width="709"]]
172
173 == 3.3 Uplink Payload ==
174
175 There are five working modes + one interrupt mode on LT for different type application:
176
177 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
178 * **MOD2**: Double DI Counting + DO + RO
179 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
180 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
181 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
182 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
183
184 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
185
186 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
187
188 [[image:image-20220523174024-3.png]]
189
190 (((
191 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
192 )))
193
194 [[image:image-20220523174254-4.png]]
195
196 * RO is for relay. ROx=1 : close，ROx=0 always open.
197 * DI is for digital input. DIx=1: high or float, DIx=0: low.
198 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
199
200 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
201
202 For example if payload is: [[image:image-20220523175847-2.png]]
203
204 **The value for the interface is:  **
205
206 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
207
208 AVI2 channel voltage is 0x04AC/1000=1.196V
209
210 ACI1 channel current is 0x1310/1000=4.880mA
211
212 ACI2 channel current is 0x1300/1000=4.864mA
213
214 The last byte 0xAA= 10101010(B) means
215
216 * [1] RO1 relay channel is close and the RO1 LED is ON.
217 * [0] RO2 relay channel is open and RO2 LED is OFF;
218
219 **LT22222-L:**
220
221 * [1] DI2 channel is high input and DI2 LED is ON;
222 * [0] DI1 channel is low input;
223
224 * [0] DO3 channel output state
225 ** DO3 is float in case no load between DO3 and V+.;
226 ** DO3 is high in case there is load between DO3 and V+.
227 ** DO3 LED is off in both case
228 * [1] DO2 channel output is low and DO2 LED is ON.
229 * [0] DO1 channel output state
230 ** DO1 is float in case no load between DO1 and V+.;
231 ** DO1 is high in case there is load between DO1 and V+.
232 ** DO1 LED is off in both case
233
234 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
235
236 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
237
238 Total : 11 bytes payload
239
240 [[image:image-20220523180452-3.png]]
241
242 (((
243 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
244 )))
245
246 [[image:image-20220523180506-4.png]]
247
248 * RO is for relay. ROx=1 : close，ROx=0 always open.
249 * FIRST: Indicate this is the first packet after join network.
250 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
251
252 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
253
254 **To use counting mode, please run:**
255
256 (% class="box infomessage" %)
257 (((
258 **AT+MOD=2**
259 )))
260
261 (% class="box infomessage" %)
262 (((
263 **ATZ**
264 )))
265
266 (% style="color:#4f81bd" %)**AT Commands for counting:**
267
268 **For LT22222-L:**
269
270 (% class="box infomessage" %)
271 (((
272 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
273 )))
274
275 (% class="box infomessage" %)
276 (((
277 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
278 )))
279
280 (% class="box infomessage" %)
281 (((
282 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
283 )))
284
285 (% class="box infomessage" %)
286 (((
287 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
288 )))
289
290 (% class="box infomessage" %)
291 (((
292 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
293 )))
294
295 (% class="box infomessage" %)
296 (((
297 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
298 )))
299
300 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
301
302 **LT22222-L**: This mode the DI1 is used as a counting pin.
303
304 [[image:image-20220523181246-5.png]]
305
306 (((
307 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
308 )))
309
310 [[image:image-20220523181301-6.png]]
311
312 * RO is for relay. ROx=1 : close，ROx=0 always open.
313 * FIRST: Indicate this is the first packet after join network.
314 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
315
316 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
317
318 **To use counting mode, please run:**
319
320 (% class="box infomessage" %)
321 (((
322 **AT+MOD=3**
323 )))
324
325 (% class="box infomessage" %)
326 (((
327 **ATZ**
328 )))
329
330 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
331
332 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
333
334 **LT22222-L**: This mode the DI1 is used as a counting pin.
335
336 The AVI1 is also used for counting. AVI1 is used to monitor the voltage. It will check the voltage **every 60s**, if voltage is higher or lower than VOLMAX mV, the AVI1 Counting increase 1, so AVI1 counting can be used to measure a machine working hour.
337
338 [[image:image-20220523181903-8.png]]
339
340 (((
341 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
342 )))
343
344 [[image:image-20220523181727-7.png]]
345
346 * RO is for relay. ROx=1 : close，ROx=0 always open.
347 * FIRST: Indicate this is the first packet after join network.
348 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
349
350 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
351
352 **To use this mode, please run:**
353
354 (% class="box infomessage" %)
355 (((
356 **AT+MOD=4**
357 )))
358
359 (% class="box infomessage" %)
360 (((
361 **ATZ**
362 )))
363
364
365 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
366
367 **Plus below command for AVI1 Counting:**
368
369 (% class="box infomessage" %)
370 (((
371 **AT+SETCNT=3,60   (set AVI Count to 60)**
372 )))
373
374 (% class="box infomessage" %)
375 (((
376 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
377 )))
378
379 (% class="box infomessage" %)
380 (((
381 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
382 )))
383
384 (% class="box infomessage" %)
385 (((
386 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
387 )))
388
389 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
390
391 **LT22222-L**: This mode the DI1 is used as a counting pin.
392
393 [[image:image-20220523182334-9.png]]
394
395 (((
396 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
397 )))
398
399 * RO is for relay. ROx=1 : close，ROx=0 always open.
400 * FIRST: Indicate this is the first packet after join network.
401 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
402
403 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
404
405 **To use this mode, please run:**
406
407 (% class="box infomessage" %)
408 (((
409 **AT+MOD=5**
410 )))
411
412 (% class="box infomessage" %)
413 (((
414 **ATZ**
415 )))
416
417 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
418
419 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
420
421 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
422
423 For example, if user has configured below commands:
424
425 * **AT+MOD=1 ** **~-~->** The normal working mode
426 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
427
428 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
429
430 1. Periodically uplink (Base on TDC time). Payload is same as the normal MOD (MOD 1 for above command). This uplink uses LoRaWAN (% style="color:#4f81bd" %)**unconfirmed**(%%) data type
431 1. Trigger uplink when meet the trigger condition. LT will sent two packets in this case, the first uplink use payload specify in this mod (mod=6), the second packets use the normal mod payload(MOD=1 for above settings). Both Uplinks use LoRaWAN (% style="color:#4f81bd" %)**CONFIRMED data type.**
432
433 **AT Command to set Trigger Condition**:
434
435 (% style="color:#4f81bd" %)**Trigger base on voltage**:
436
437 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
438
439 **Example:**
440
441 AT+AVLIM=3000,6000,0,2000   (If AVI1 voltage lower than 3v or higher than 6v. or AV2 voltage is higher than 2v, LT will trigger Uplink)
442
443 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
444
445 (% style="color:#4f81bd" %)**Trigger base on current**:
446
447 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
448
449 **Example:**
450
451 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
452
453 (% style="color:#4f81bd" %)**Trigger base on DI status**:
454
455 DI status trigger Flag.
456
457 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
458
459 **Example:**
460
461 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
462
463
464 **Downlink Command to set Trigger Condition**
465
466 Type Code: 0xAA. Downlink command same as AT Command [[AT+AVLIM, AT+ACLIM>>path:#AT_Trigger]]
467
468 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
469
470 AA: Code for this downlink Command:
471
472 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
473
474 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
475
476 yy2 yy2: AC1 or AV1 high limit.
477
478 yy3 yy3: AC2 or AV2 low limit.
479
480 Yy4 yy4: AC2 or AV2 high limit.
481
482 **Example1**: AA 00 13 88 00 00 00 00 00 00
483
484 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
485
486 Example2: AA 02 01 00
487
488 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
489
490 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
491
492 MOD6 Payload : total 11 bytes payload
493
494 [[image:image-20220524085923-1.png]]
495
496 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
497
498 [[image:image-20220524090106-2.png]]
499
500 * Each bits shows if the corresponding trigger has been configured.
501
502 **Example:**
503
504 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
505
506
507 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
508
509 [[image:image-20220524090249-3.png]]
510
511 * Each bits shows which status has been trigger on this uplink.
512
513 **Example:**
514
515 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
516
517
518 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
519
520 [[image:image-20220524090456-4.png]]
521
522 * Each bits shows which status has been trigger on this uplink.
523
524 **Example:**
525
526 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
527
528 00000101: Means both DI1 and DI2 trigger are enabled.
529
530
531 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
532
533 Downlink command to poll MOD6 status:
534
535 **AB 06**
536
537 When device got this command, it will send the MOD6 payload.
538
539 === 3.3.7 Payload Decoder ===
540
541 (((
542 **Decoder for TTN/loraserver/ChirpStack**: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/]]
543 )))
544
545 == 3.4 ​Configure LT via AT or Downlink ==
546
547 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
548
549 (((
550 There are two kinds of Commands:
551 )))
552
553 * (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
554
555 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
556
557 === 3.4.1 Common Commands ===
558
559 They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>http://8.211.40.43:8080/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]
560
561 === 3.4.2 Sensor related commands ===
562
563 ==== 3.4.2.1 Set Transmit Interval ====
564
565 Set device uplink interval.
566
567 * AT Command:
568
569 (% class="box infomessage" %)
570 (((
571 **AT+TDC=N **
572 )))
573
574 **Example: **AT+TDC=30000. Means set interval to 30 seconds
575
576 * Downlink Payload (prefix 0x01):
577
578 (% class="box infomessage" %)
579 (((
580 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
581 )))
582
583 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
584
585 Set work mode.
586
587 * AT Command:
588
589 (% class="box infomessage" %)
590 (((
591 **AT+MOD=N  **
592 )))
593
594 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
595
596 * Downlink Payload (prefix 0x0A):
597
598 (% class="box infomessage" %)
599 (((
600 **0x0A aa     ~/~/ Same as AT+MOD=aa**
601 )))
602
603 ==== 3.4.2.3 Poll an uplink ====
604
605 * AT Command:
606
607 There is no AT Command to poll uplink
608
609 * Downlink Payload (prefix 0x08):
610
611 (% class="box infomessage" %)
612 (((
613 **0x08 FF     ~/~/ Poll an uplink,**
614 )))
615
616 **Example**: 0x08FF, ask device to send an Uplink
617
618 ==== 3.4.2.4 Enable Trigger Mode ====
619
620 Use of trigger mode, please check [[ADDMOD6>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
621
622 * AT Command:
623
624 (% class="box infomessage" %)
625 (((
626 **AT+ADDMOD6=1 or 0**
627 )))
628
629 1: Enable Trigger Mode
630
631 0: Disable Trigger Mode
632
633 * Downlink Payload (prefix 0x0A 06):
634
635 (% class="box infomessage" %)
636 (((
637 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
638 )))
639
640 ==== 3.4.2.5 Poll trigger settings ====
641
642 Poll trigger settings,
643
644 * AT Command:
645
646 There is no AT Command for this feature.
647
648 * Downlink Payload (prefix 0x AB 06):
649
650 (% class="box infomessage" %)
651 (((
652 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
653 )))
654
655 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
656
657 Enable Disable DI1/DI2/DI2 as trigger,
658
659 * AT Command:
660
661 (% class="box infomessage" %)
662 (((
663 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
664 )))
665
666 **Example:**
667
668 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
669
670 * Downlink Payload (prefix 0xAA 02):
671
672 (% class="box infomessage" %)
673 (((
674 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
675 )))
676
677 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
678
679 Set DI1 or DI3(for LT-33222-L) trigger.
680
681 * AT Command:
682
683 (% class="box infomessage" %)
684 (((
685 **AT+TRIG1=a,b**
686 )))
687
688 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
689
690 b : delay timing.
691
692 **Example:**
693
694 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
695
696 * Downlink Payload (prefix 0x09 01 ):
697
698 (% class="box infomessage" %)
699 (((
700 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
701 )))
702
703 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
704
705 Set DI2 trigger.
706
707 * AT Command:
708
709 (% class="box infomessage" %)
710 (((
711 **AT+TRIG2=a,b**
712 )))
713
714 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
715
716 b : delay timing.
717
718 **Example:**
719
720 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
721
722 * Downlink Payload (prefix 0x09 02 ):
723
724 (% class="box infomessage" %)
725 (((
726 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
727 )))
728
729 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
730
731 Set current trigger , base on AC port. See [[trigger mode>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
732
733 * AT Command:
734
735 (% class="box infomessage" %)
736 (((
737 **AT+ACLIM. **
738 )))
739
740 * Downlink Payload (prefix 0xAA 01 ):
741
742 (% class="box infomessage" %)
743 (((
744 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
745 )))
746
747 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
748
749 Set current trigger , base on AV port. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
750
751 * AT Command:
752
753 (% class="box infomessage" %)
754 (((
755 **AT+AVLIM. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
756 )))
757
758 * Downlink Payload (prefix 0xAA 00 ):
759
760 (% class="box infomessage" %)
761 (((
762 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]] **
763 )))
764
765 ==== 3.4.2.11 Trigger – Set minimum interval ====
766
767 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
768
769 * AT Command:
770
771 (% class="box infomessage" %)
772 (((
773 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
774 )))
775
776 * Downlink Payload (prefix 0xAC ):
777
778 (% class="box infomessage" %)
779 (((
780 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
781 )))
782
783 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
784
785 * AT Command:
786
787 There is no AT Command to control Digital Output
788
789 * Downlink Payload (prefix 0x02):
790
791 (% class="box infomessage" %)
792 (((
793 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
794 )))
795
796 (((
797 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
798 )))
799
800 (((
801 01: Low,  00: High ,  11: No action
802 )))
803
804 [[image:image-20220524092754-5.png]]
805
806 (((
807 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
808 )))
809
810 (((
811 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
812 )))
813
814
815 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
816
817 * AT Command:
818
819 There is no AT Command to control Digital Output
820
821 * Downlink Payload (prefix 0xA9):
822
823 (% class="box infomessage" %)
824 (((
825 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
826 )))
827
828 This is to control the digital output time of DO pin. Include four bytes:
829
830 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
831
832 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
833
834 01: DO pins will change back to original state after timeout.
835
836 00: DO pins will change to an inverter state after timeout 
837
838 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
839
840 [[image:image-20220524093238-6.png]]
841
842 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
843
844 [[image:image-20220524093328-7.png]]
845
846 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
847
848 [[image:image-20220524093351-8.png]]
849
850 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
851
852 Latching time. Unit: ms
853
854 Device will upload a packet if downlink code executes successfully.
855
856 **Example payload:**
857
858 **~1. A9 01 01 01 01 07 D0**
859
860 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
861
862 **2. A9 01 00 01 11 07 D0**
863
864 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
865
866 **3. A9 00 00 00 00 07 D0**
867
868 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
869
870 **4. A9 00 11 01 00 07 D0**
871
872 DO1 pin no action, DO2 pin set low, DO3 pin set high, last 2 seconds, then DO1 pin no action, DO2 pin set high, DO3 pin set low
873
874
875 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
876
877 * AT Command:
878
879 There is no AT Command to control Relay Output
880
881 * Downlink Payload (prefix 0x03):
882
883 (% class="box infomessage" %)
884 (((
885 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
886 )))
887
888 (((
889 If payload = 0x030100, it means set RO1 to close and RO2 to open.
890 )))
891
892 (((
893 01: Close ,  00: Open , 11: No action
894 )))
895
896 (((
897 [[image:image-20220524093724-9.png]]
898 )))
899
900 Device will upload a packet if downlink code executes successfully.
901
902
903 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
904
905 * AT Command:
906
907 There is no AT Command to control Relay Output
908
909 * Downlink Payload (prefix 0x05):
910
911 (% class="box infomessage" %)
912 (((
913 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
914 )))
915
916 This is to control the relay output time of relay. Include four bytes:
917
918 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
919
920 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
921
922 01: Relays will change back to original state after timeout.
923
924 00: Relays will change to an inverter state after timeout
925
926 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
927
928 [[image:image-20220524093831-10.png]]
929
930 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
931
932 Device will upload a packet if downlink code executes successfully.
933
934 **Example payload:**
935
936 **~1. 05 01 11 07 D0**
937
938 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
939
940 **2. 05 01 10 07 D0**
941
942 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
943
944 **3. 05 00 01 07 D0**
945
946 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
947
948 **4. 05 00 00 07 D0**
949
950 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
951
952
953 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
954
955 When voltage exceed the threshold, count. Feature see [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]
956
957 * AT Command:
958
959 (% class="box infomessage" %)
960 (((
961 **AT+VOLMAX    ~/~/ See [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]**
962 )))
963
964 * Downlink Payload (prefix 0xA5):
965
966 (% class="box infomessage" %)
967 (((
968 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
969 )))
970
971 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
972
973 * AT Command:
974
975 (% class="box infomessage" %)
976 (((
977 **AT+SETCNT=aa,(bb cc dd ee) **
978 )))
979
980 aa: 1: Set count1,
981
982 2: Set count2,
983
984 3: Set AV1 count
985
986 Bb cc dd ee: number to be set
987
988 * Downlink Payload (prefix 0xA8):
989
990 (% class="box infomessage" %)
991 (((
992 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
993 )))
994
995 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
996
997 Clear counting for counting mode
998
999 * AT Command:
1000
1001 (% class="box infomessage" %)
1002 (((
1003 **AT+CLRCOUNT ~/~/ clear all counting**
1004 )))
1005
1006 * Downlink Payload (prefix 0xA6):
1007
1008 (% class="box infomessage" %)
1009 (((
1010 **0x A6 01     ~/~/ clear all counting,**
1011 )))
1012
1013 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1014
1015 * AT Command:
1016
1017 (% class="box infomessage" %)
1018 (((
1019 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1020 )))
1021
1022 * Downlink Payload (prefix 0xA7):
1023
1024 (% class="box infomessage" %)
1025 (((
1026 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1027 )))
1028
1029 range: aa bb cc:0 to 16777215,  (unit:second)
1030
1031 == 3.5 Integrate with Mydevice ==
1032
1033 Mydevices provides a human friendly interface to show the sensor data, once we have data in TTN, we can use Mydevices to connect to TTN and see the data in Mydevices. Below are the steps:
1034
1035 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1036
1037 **Step 2**: To configure the Application to forward data to Mydevices you will need to add integration. To add the Mydevices integration, perform the following steps:
1038
1039 [[image:1653356737703-362.png||height="232" width="732"]]
1040
1041 [[image:image-20220524094641-11.png||height="390" width="723"]]
1042
1043
1044 [[image:image-20220524094641-12.png||height="402" width="718"]]
1045
1046 **Step **3: Create an account or log in Mydevices.
1047
1048 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1049
1050 Search under The things network
1051
1052 [[image:1653356838789-523.png||height="337" width="740"]]
1053
1054 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1055
1056
1057 [[image:image-20220524094909-1.png||height="335" width="729"]]
1058
1059 [[image:image-20220524094909-2.png||height="337" width="729"]]
1060
1061 [[image:image-20220524094909-3.png||height="338" width="727"]]
1062
1063 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1064
1065 [[image:image-20220524094909-5.png||height="341" width="734"]]
1066
1067
1068
1069
1070
1071 == 3.6 Interface Detail ==
1072
1073 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1074
1075 Support NPN Type sensor
1076
1077 [[image:1653356991268-289.png]]
1078
1079 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1080
1081 (((
1082 The DI port of LT-22222-L can support NPN or PNP output sensor.
1083 )))
1084
1085 (((
1086 Internal circuit as below, the NEC2501 is a photocoupler, the Active current (from NEC2501 pin 1 to pin 2 is 1ma and the max current is 50mA. When there is active current pass NEC2501 pin1 to pin2. The DI will be active high
1087 )))
1088
1089 [[image:1653357170703-587.png]]
1090
1091 (((
1092 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1093 )))
1094
1095
1096 **Example1**: Connect to a Low active sensor.
1097
1098 This type of sensor will output a low signal GND when active.
1099
1100 * Connect sensor’s output to DI1-
1101 * Connect sensor’s VCC to DI1+.
1102
1103 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1104
1105 //IF// = DI1+ / 1K.
1106
1107 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1108
1109
1110 **Example2**: Connect to a High active sensor.
1111
1112 This type of sensor will output a high signal (example 24v) when active.
1113
1114 * Connect sensor’s output to DI1+
1115 * Connect sensor’s GND DI1-.
1116
1117 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1118
1119 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
1120
1121 If **DI1+ = 24v**, the [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1122
1123
1124 **Example3**: Connect to a 220v high active sensor.
1125
1126 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1127
1128 * Connect sensor’s output to DI1+ with a serial 50K resistor
1129 * Connect sensor’s GND DI1-.
1130
1131 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1132
1133 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
1134
1135 If sensor output is 220v, the (% id="cke_bm_243359S" style="display:none" %)[[image:image-20220524095628-8.png]](%%) = DI1+ / 51K.  = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
1136
1137 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1138
1139 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1140
1141 [[image:1653357531600-905.png]]
1142
1143 === 3.6.4 Analog Input Interface ===
1144
1145 The analog input interface is as below. The LT will measure the IN2 voltage so to calculate the current pass the Load. The formula is:
1146
1147 **AC2 = (IN2 voltage )/12**
1148
1149 [[image:1653357592296-182.png]]
1150
1151 Example to connect a 4~~20mA sensor
1152
1153 We take the wind speed sensor as an example for reference only.
1154
1155 Specifications of the wind speed sensor:
1156
1157 Red:12~~24v
1158
1159 Yellow:4~~20mA
1160
1161 Black:GND
1162
1163
1164 Connection diagram:
1165
1166 [[image:1653357640609-758.png]]
1167
1168 [[image:1653357648330-671.png||height="155" width="733"]]
1169
1170 === 3.6.5 Relay Output ===
1171
1172 (((
1173 The LT serial controller has two relay interfaces; each interface uses two pins of the screw terminal. User can connect other device’s Power Line to in serial of RO1_1 and RO_2. Such as below:
1174 )))
1175
1176 [[image:image-20220524100215-9.png]]
1177
1178 [[image:image-20220524100215-10.png||height="382" width="723"]]
1179
1180 == 3.7 LEDs Indicators ==
1181
1182 [[image:image-20220524100748-11.png]]
1183
1184 = 4. Use AT Command =
1185
1186 == 4.1 Access AT Command ==
1187
1188 LT supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to LT for using AT command, as below.
1189
1190 [[image:1653358238933-385.png]]
1191
1192 In PC, User needs to set (% style="color:#4f81bd" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**)(%%) to active it. As shown below:
1193
1194 [[image:1653358355238-883.png]]
1195
1196 More detail AT Command manual can be found at [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1197
1198 (((
1199 AT+<CMD>?        : Help on <CMD>
1200 )))
1201
1202 (((
1203 AT+<CMD>         : Run <CMD>
1204 )))
1205
1206 (((
1207 AT+<CMD>=<value> : Set the value
1208 )))
1209
1210 (((
1211 AT+<CMD>=?       : Get the value
1212 )))
1213
1214 (((
1215 ATZ: Trig a reset of the MCU
1216 )))
1217
1218 (((
1219 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1220 )))
1221
1222 (((
1223 AT+DEUI: Get or Set the Device EUI
1224 )))
1225
1226 (((
1227 AT+DADDR: Get or Set the Device Address
1228 )))
1229
1230 (((
1231 AT+APPKEY: Get or Set the Application Key
1232 )))
1233
1234 (((
1235 AT+NWKSKEY: Get or Set the Network Session Key
1236 )))
1237
1238 (((
1239 AT+APPSKEY: Get or Set the Application Session Key
1240 )))
1241
1242 (((
1243 AT+APPEUI: Get or Set the Application EUI
1244 )))
1245
1246 (((
1247 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1248 )))
1249
1250 (((
1251 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1252 )))
1253
1254 (((
1255 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1256 )))
1257
1258 (((
1259 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1260 )))
1261
1262 (((
1263 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1264 )))
1265
1266 (((
1267 AT+RX2FQ: Get or Set the Rx2 window frequency
1268 )))
1269
1270 (((
1271 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1272 )))
1273
1274 (((
1275 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1276 )))
1277
1278 (((
1279 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1280 )))
1281
1282 (((
1283 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1284 )))
1285
1286 (((
1287 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1288 )))
1289
1290 (((
1291 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1292 )))
1293
1294 (((
1295 AT+NWKID: Get or Set the Network ID
1296 )))
1297
1298 (((
1299 AT+FCU: Get or Set the Frame Counter Uplink
1300 )))
1301
1302 (((
1303 AT+FCD: Get or Set the Frame Counter Downlink
1304 )))
1305
1306 (((
1307 AT+CLASS: Get or Set the Device Class
1308 )))
1309
1310 (((
1311 AT+JOIN: Join network
1312 )))
1313
1314 (((
1315 AT+NJS: Get OTAA Join Status
1316 )))
1317
1318 (((
1319 AT+SENDB: Send hexadecimal data along with the application port
1320 )))
1321
1322 (((
1323 AT+SEND: Send text data along with the application port
1324 )))
1325
1326 (((
1327 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1328 )))
1329
1330 (((
1331 AT+RECV: Print last received data in raw format
1332 )))
1333
1334 (((
1335 AT+VER: Get current image version and Frequency Band
1336 )))
1337
1338 (((
1339 AT+CFM: Get or Set the confirmation mode (0-1)
1340 )))
1341
1342 (((
1343 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1344 )))
1345
1346 (((
1347 AT+SNR: Get the SNR of the last received packet
1348 )))
1349
1350 (((
1351 AT+RSSI: Get the RSSI of the last received packet
1352 )))
1353
1354 (((
1355 AT+TDC: Get or set the application data transmission interval in ms
1356 )))
1357
1358 (((
1359 AT+PORT: Get or set the application port
1360 )))
1361
1362 (((
1363 AT+DISAT: Disable AT commands
1364 )))
1365
1366 (((
1367 AT+PWORD: Set password, max 9 digits
1368 )))
1369
1370 (((
1371 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1372 )))
1373
1374 (((
1375 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1376 )))
1377
1378 (((
1379 AT+CFG: Print all settings
1380 )))
1381
1382 == 4.2 Common AT Command Sequence ==
1383
1384 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1385
1386 (((
1387 If device has not joined network yet:
1388 )))
1389
1390 (((
1391 (% style="background-color:#dcdcdc" %)123456
1392 )))
1393
1394 (((
1395 (% style="background-color:#dcdcdc" %)AT+FDR
1396 )))
1397
1398 (((
1399 (% style="background-color:#dcdcdc" %)123456
1400 )))
1401
1402 (((
1403 (% style="background-color:#dcdcdc" %)AT+NJM=0
1404 )))
1405
1406 (((
1407 (% style="background-color:#dcdcdc" %)ATZ
1408 )))
1409
1410
1411 (((
1412 If device already joined network:
1413 )))
1414
1415 (((
1416 (% style="background-color:#dcdcdc" %)AT+NJM=0
1417 )))
1418
1419 (((
1420 (% style="background-color:#dcdcdc" %)ATZ
1421 )))
1422
1423 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1424
1425 (((
1426 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1427 )))
1428
1429 (((
1430 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1431 )))
1432
1433 (((
1434 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1435 )))
1436
1437 (((
1438 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1439 )))
1440
1441 (((
1442 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1443 )))
1444
1445 (((
1446 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1447 )))
1448
1449 (((
1450 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1451 )))
1452
1453 (((
1454 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1455 )))
1456
1457 (((
1458 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1459 )))
1460
1461 (((
1462 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1463 )))
1464
1465 (((
1466 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1467 )))
1468
1469 (((
1470 (% style="background-color:#dcdcdc" %) AT+DADDR=26 01 1A F1 (%%)Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1471 )))
1472
1473 (((
1474 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1475 )))
1476
1477 (((
1478 (% style="color:red" %)**Note:**
1479 )))
1480
1481 (((
1482 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1483 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1484 3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
1485 4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
1486 )))
1487
1488 (((
1489 [[image:1653359097980-169.png||height="188" width="729"]]
1490 )))
1491
1492 (((
1493
1494 )))
1495
1496 === 4.2.3 Change to Class A ===
1497
1498 If sensor JOINED
1499 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1500 ATZ
1501
1502 = 5. FAQ =
1503 == 5.1 How to upgrade the image? ==
1504 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1505
1506
1507 * Support new features
1508 * For bug fix
1509 * Change LoRaWAN bands.
1510 Below shows the hardware connection for how to upload an image to the LT:
1511
1512 **Step1:** Download [[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]].
1513 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1514 **Step3: **Open flashloader; choose the correct COM port to update.
1515 **For LT-22222-L**:
1516 Hold down the PRO button and then momentarily press the RST reset button and the **DO1 led** will change from OFF to ON. When **DO1 LED** is on, it means the device is in download mode.
1517
1518 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.png]]
1519
1520 (% style="color:red" %)**Notice**: In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:
1521
1522
1523 1. (((
1524 (((
1525
1526 )))
1527
1528 1. (((
1529 How to change the LoRa Frequency Bands/Region?
1530 )))
1531 )))
1532
1533 (((
1534 User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1535 )))
1536
1537 (((
1538
1539 )))
1540
1541 1.
1542 11. (((
1543 How to set up LT to work with Single Channel Gateway such as LG01/LG02?
1544 )))
1545
1546 (((
1547 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1548 )))
1549
1550 (((
1551 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1552 )))
1553
1554 (((
1555
1556 )))
1557
1558 (((
1559 **Step1**: Log in TTN, Create an ABP device in the application and input the network session key (NETSKEY), app session key (APPSKEY) from the device.
1560 )))
1561
1562 (((
1563 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image039.png]]
1564 )))
1565
1566 (((
1567 Note: user just need to make sure above three keys match, User can change either in TTN or Device to make then match. In TTN, NETSKEY and APPSKEY can be configured by user in setting page, but Device Addr is generated by TTN.
1568 )))
1569
1570 (((
1571
1572 )))
1573
1574 (((
1575 **Step2: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1576 )))
1577
1578 (((
1579 123456   Enter Password to have AT access.
1580 )))
1581
1582 (((
1583 AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1584 )))
1585
1586 (((
1587 123456   Enter Password to have AT access.
1588 )))
1589
1590 (((
1591 AT+NJM=0 Set to ABP mode
1592 )))
1593
1594 (((
1595 AT+ADR=0 Set the Adaptive Data Rate Off
1596 )))
1597
1598 (((
1599 AT+DR=5  Set Data Rate (Set AT+DR=3 for 915 band)
1600 )))
1601
1602 (((
1603 AT+TDC=60000  Set transmit interval to 60 seconds
1604 )))
1605
1606 (((
1607 AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1608 )))
1609
1610 (((
1611 AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1
1612 )))
1613
1614 (((
1615 ATZ                Reset MCU
1616 )))
1617
1618 (((
1619 As shown in below:
1620 )))
1621
1622 (((
1623 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image040.png]]
1624 )))
1625
1626 (((
1627
1628 )))
1629
1630 (((
1631
1632 )))
1633
1634 1. (((
1635 (((
1636
1637 )))
1638
1639 1. (((
1640 Can I see counting event in Serial?
1641 )))
1642 )))
1643
1644 (((
1645 User can run AT+DEBUG command to see the counting event in serial. If firmware too old and doesn’t support AT+DEBUG. User can update to latest firmware first.
1646 )))
1647
1648 (((
1649
1650 )))
1651
1652 (((
1653
1654 )))
1655
1656 (((
1657
1658 )))
1659
1660 1. (((
1661 (((
1662 Trouble Shooting    
1663 )))
1664
1665 1. (((
1666 Downlink doesn’t work, how to solve it?
1667 )))
1668 )))
1669
1670 (((
1671 Please see this link for how to debug:
1672 )))
1673
1674 (((
1675 [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work]]
1676 )))
1677
1678 (((
1679
1680 )))
1681
1682 1.
1683 11. (((
1684 Have trouble to upload image.
1685 )))
1686
1687 (((
1688 See this link for trouble shooting:
1689 )))
1690
1691 (((
1692 [[http:~~/~~/wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting>>url:http://wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting]]
1693 )))
1694
1695 (((
1696
1697 )))
1698
1699 1.
1700 11. (((
1701 Why I can’t join TTN in US915 /AU915 bands?
1702 )))
1703
1704 (((
1705 It might be about the channels mapping. Please see this link for detail:
1706 )))
1707
1708 (((
1709 [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]
1710 )))
1711
1712 (((
1713
1714 )))
1715
1716 (((
1717
1718 )))
1719
1720 (((
1721
1722 )))
1723
1724 1. (((
1725 Order Info
1726 )))
1727
1728 (((
1729 **For LT-33222-L-XXX or LT-22222-L-XXX:**
1730 )))
1731
1732 (((
1733 **XXX:**
1734 )))
1735
1736 * (((
1737 **EU433**: LT with frequency bands EU433
1738 )))
1739 * (((
1740 **EU868**: LT with frequency bands EU868
1741 )))
1742 * (((
1743 **KR920**: LT with frequency bands KR920
1744 )))
1745 * (((
1746 **CN470**: LT with frequency bands CN470
1747 )))
1748 * (((
1749 **AS923**: LT with frequency bands AS923
1750 )))
1751 * (((
1752 **AU915**: LT with frequency bands AU915
1753 )))
1754 * (((
1755 **US915**: LT with frequency bands US915
1756 )))
1757 * (((
1758 **IN865**: LT with frequency bands IN865
1759 )))
1760 * (((
1761 **CN779**: LT with frequency bands CN779
1762 )))
1763
1764 1. (((
1765 Packing Info
1766 )))
1767
1768 (((
1769 **Package Includes**:
1770 )))
1771
1772 * (((
1773 LT I/O Controller x 1
1774 )))
1775 * (((
1776 Stick Antenna for LoRa RF part x 1
1777 )))
1778 * (((
1779 Bracket for controller x1
1780 )))
1781 * (((
1782 Program cable x 1
1783 )))
1784
1785 (((
1786 **Dimension and weight**:
1787 )))
1788
1789 * (((
1790 Device Size: 13.5 x 7 x 3 cm
1791 )))
1792 * (((
1793 Device Weight: 105g
1794 )))
1795 * (((
1796 Package Size / pcs : 14.5 x 8 x 5 cm
1797 )))
1798 * (((
1799 Weight / pcs : 170g
1800 )))
1801
1802 1. (((
1803 Support
1804 )))
1805
1806 * (((
1807 Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1808 )))
1809 * (((
1810 Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to
1811 )))
1812
1813 (((
1814 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1815 )))

Applications

Navigation

Copyright ©2010-2022 Dragino Technology Co., LTD. All rights reserved
Dragino Wiki v2.0