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Version 27.3 by Xiaoling on 2022/05/24 09:18
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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
584 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
585
586 Set work mode.
587
588 * AT Command:
589
590 (% class="box infomessage" %)
591 (((
592 **AT+MOD=N  **
593 )))
594
595 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
596
597 * Downlink Payload (prefix 0x0A):
598
599 (% class="box infomessage" %)
600 (((
601 **0x0A aa     ~/~/ Same as AT+MOD=aa**
602 )))
603
604 ==== 3.4.2.3 Poll an uplink ====
605
606 * AT Command:
607
608 There is no AT Command to poll uplink
609
610 * Downlink Payload (prefix 0x08):
611
612 (% class="box infomessage" %)
613 (((
614 **0x08 FF     ~/~/ Poll an uplink,**
615 )))
616
617 **Example**: 0x08FF, ask device to send an Uplink
618
619
620 ==== 3.4.2.4 Enable Trigger Mode ====
621
622 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]]
623
624 * AT Command:
625
626 (% class="box infomessage" %)
627 (((
628 **AT+ADDMOD6=1 or 0**
629 )))
630
631 1: Enable Trigger Mode
632
633 0: Disable Trigger Mode
634
635
636 * Downlink Payload (prefix 0x0A 06):
637
638 0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,
639
640
641 ==== Poll trigger settings ====
642
643 Poll trigger settings,
644
645 * AT Command:
646
647 There is no AT Command for this feature.
648
649
650 * Downlink Payload (prefix 0x AB 06):
651
652 0xAB 06  ~/~/ Poll trigger settings, device will uplink [[trigger settings>>path:#Trigger_Settings]] once receive this command
653
654
655 ==== Enable / Disable DI1/DI2/DI3 as trigger ====
656
657 Enable Disable DI1/DI2/DI2 as trigger,
658
659 * AT Command:
660
661 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
662
663 Example:
664
665 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
666
667
668
669 * Downlink Payload (prefix 0xAA 02):
670
671 0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb
672
673
674
675 ==== Trigger1 – Set DI1 or DI3 as trigger ====
676
677 Set DI1 or DI3(for LT-33222-L) trigger.
678
679 * AT Command:
680
681 AT+TRIG1=a,b
682
683 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
684
685 b : delay timing.
686
687 Example:
688
689 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
690
691
692 * Downlink Payload (prefix 0x09 01 ):
693
694 0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
695
696
697 ==== Trigger2 – Set DI2 as trigger ====
698
699 Set DI2 trigger.
700
701 * AT Command:
702
703 AT+TRIG2=a,b
704
705 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
706
707 b : delay timing.
708
709 Example:
710
711 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
712
713
714 * Downlink Payload (prefix 0x09 02 ):
715
716 0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
717
718
719 ==== Trigger – Set AC (current) as trigger ====
720
721 Set current trigger , base on AC port. See [[trigger mode>>path:#MOD6]]
722
723 * AT Command:
724
725 AT+ACLIM. See [[trigger mode>>path:#MOD6]]
726
727
728 * Downlink Payload (prefix 0xAA 01 ):
729
730 0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>path:#MOD6]]
731
732
733 ==== Trigger – Set AV (voltage) as trigger ====
734
735 Set current trigger , base on AV port. See [[trigger mode>>path:#MOD6]]
736
737 * AT Command:
738
739 AT+AVLIM. See [[trigger mode>>path:#MOD6]]
740
741
742 * Downlink Payload (prefix 0xAA 00 ):
743
744 0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>path:#MOD6]]
745
746 ==== Trigger – Set minimum interval ====
747
748 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
749
750 * AT Command:
751
752 AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.
753
754
755 * Downlink Payload (prefix 0xAC ):
756
757 0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
758
759
760 ==== DO ~-~- Control Digital Output DO1/DO2/DO3 ====
761
762 * AT Command:
763
764 There is no AT Command to control Digital Output
765
766
767 * Downlink Payload (prefix 0x02):
768
769 0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output
770
771 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
772
773 01: Low,  00: High ,  11: No action
774
775 (% border="1" style="background-color:#f7faff" %)
776 |Downlink Code|DO1|DO2|DO3
777 |02  01  00  11|Low|High|No Action
778 |02  00  11  01|High|No Action|Low
779 |02  11  01  00|No Action|Low|High
780
781 Note: For LT-22222-L, there is no DO3, the last byte can use any value.
782
783 Device will upload a packet if downlink code executes successfully.
784
785
786
787
788
789 ==== DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
790
791 * AT Command:
792
793 There is no AT Command to control Digital Output
794
795
796 * Downlink Payload (prefix 0xA9):
797
798 0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control
799
800 This is to control the digital output time of DO pin. Include four bytes:
801
802 **First Byte:** Type code (0xA9)
803
804 **Second Byte**: Inverter Mode
805
806 01: DO pins will change back to original state after timeout.
807
808 00: DO pins will change to an inverter state after timeout 
809
810
811 **Third Byte**: Control Method and Ports status:
812
813 (% border="1" style="background-color:#f7faff" %)
814 |Second Byte|Status
815 |0x01|DO1 set to low
816 |0x00|DO1 set to high
817 |0x11|DO1 NO Action
818
819 **Fourth Byte**: Control Method and Ports status:
820
821 (% border="1" style="background-color:#f7faff" %)
822 |Second Byte|Status
823 |0x01|DO2 set to low
824 |0x00|DO2 set to high
825 |0x11|DO2 NO Action
826
827 **Fifth Byte**: Control Method and Ports status:
828
829 (% border="1" style="background-color:#f7faff" %)
830 |Second Byte|Status
831 |0x01|DO3 set to low
832 |0x00|DO3 set to high
833 |0x11|DO3 NO Action
834
835 **Sixth and Seventh Byte**:
836
837 Latching time. Unit: ms
838
839 Device will upload a packet if downlink code executes successfully.
840
841
842
843 Example payload:
844
845 1. A9 01 01 01 01 07 D0
846
847 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
848
849
850 1. A9 01 00 01 11 07 D0
851
852 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
853
854
855 1. A9 00 00 00 00 07 D0
856
857 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
858
859
860 1. A9 00 11 01 00 07 D0
861
862 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
863
864
865
866
867 ==== Relay ~-~- Control Relay Output RO1/RO2 ====
868
869 * AT Command:
870
871 There is no AT Command to control Relay Output
872
873
874 * Downlink Payload (prefix 0x03):
875
876 0x03 aa bb     ~/~/ Set RO1/RO2 output
877
878 If payload = 0x030100, it means set RO1 to close and RO2 to open.
879
880 01: Close ,  00: Open , 11: No action
881
882 (% border="1" style="background-color:#f7faff" %)
883 |Downlink Code|RO1|RO2
884 |03  00  11|Open|No Action
885 |03  01  11|Close|No Action
886 |03  11  00|No Action|Open
887 |03  11  01|No Action|Close
888 |03  00  00|Open|Open
889 |03  01  01|Close|Close
890 |03  01  00|Close|Open
891 |03  00  01|Open|Close
892
893 Device will upload a packet if downlink code executes successfully.
894
895
896 ==== Relay ~-~- Control Relay Output RO1/RO2 with time control ====
897
898 * AT Command:
899
900 There is no AT Command to control Relay Output
901
902
903 * Downlink Payload (prefix 0x05):
904
905 0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:
906
907 This is to control the relay output time of relay. Include four bytes:
908
909 **First Byte:** Type code (0x05)
910
911 **Second Byte(aa)**: Inverter Mode
912
913 01: Relays will change back to original state after timeout.
914
915 00: Relays will change to an inverter state after timeout
916
917
918 **Third Byte(bb)**: Control Method and Ports status:
919
920 (% border="1" style="background-color:#f7faff" %)
921 |Value|Status
922 |0x11|RO1 and RO2 to NO
923 |0x10|RO2 to NO, RO1 to NC
924 |0x01|RO2 to NC, RO1 to NO
925 |0x00|RO1 and RO2 to NC.
926 |0x20|RO1 No Action, RO2 to NC
927 |0x21|RO1 No Action, RO2 to NO
928 |0x02|RO1 to NC, RO2 No Action
929 |0x12|RO1 to NO, RO2 No Action
930
931 **Fourth / Fifth Bytes (cc)**: Latching time. Unit: ms
932
933 Device will upload a packet if downlink code executes successfully.
934
935
936
937 **Example payload:**
938
939 1. 05 01 11 07 D0
940
941 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
942
943
944 1. 05 01 10 07 D0
945
946 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
947
948
949 1. 05 00 01 07 D0
950
951 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
952
953
954 1. 05 00 00 07 D0
955
956 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
957
958
959
960
961
962
963 ==== Counting ~-~- Voltage threshold counting ====
964
965 When voltage exceed the threshold, count. Feature see [[MOD4>>path:#MOD4]]
966
967 * AT Command:
968
969 AT+VOLMAX    ~/~/ See [[MOD4>>path:#MOD4]]
970
971
972 * Downlink Payload (prefix 0xA5):
973
974 0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc
975
976
977 ==== Counting ~-~- Pre-configure the Count Number ====
978
979 * AT Command:
980
981 AT+SETCNT=aa,(bb cc dd ee)
982
983 aa: 1: Set count1,
984
985 2: Set count2,
986
987 3: Set AV1 count
988
989 Bb cc dd ee: number to be set
990
991
992 * Downlink Payload (prefix 0xA8):
993
994 0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
995
996
997
998
999
1000 ==== Counting ~-~- Clear Counting ====
1001
1002 Clear counting for counting mode
1003
1004 * AT Command:
1005
1006 AT+CLRCOUNT ~/~/ clear all counting
1007
1008
1009 * Downlink Payload (prefix 0xA6):
1010
1011 0x A6 01     ~/~/ clear all counting,
1012
1013
1014
1015
1016 ==== Counting ~-~- Change counting mode save time ====
1017
1018 * AT Command:
1019
1020 AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1021
1022
1023 * Downlink Payload (prefix 0xA7):
1024
1025 0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,
1026
1027 range: aa bb cc:0 to 16777215,  (unit:second)
1028
1029
1030
1031
1032 1.
1033 11. Integrate with Mydevice
1034
1035 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:
1036
1037
1038 Step 1: Be sure that your device is programmed and properly connected to the network at this time.
1039
1040 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:
1041
1042
1043 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image010.png]]
1044
1045
1046 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image011.png]]
1047
1048
1049 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image012.png]]
1050
1051
1052
1053 Step 3: Create an account or log in Mydevices.
1054
1055 Step 4: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.
1056
1057 Search under The things network
1058
1059 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image013.png]]
1060
1061
1062 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1063
1064 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
1065
1066
1067 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
1068
1069
1070 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
1071
1072
1073 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
1074
1075
1076 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
1077
1078
1079 1.
1080 11. Interface Detail
1081 111. Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active )
1082
1083 Support NPN Type sensor
1084
1085 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
1086
1087
1088
1089 1.
1090 11.
1091 111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1092
1093 The DI port of LT-22222-L can support NPN or PNP output sensor.
1094
1095 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
1096
1097 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1098
1099 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1100
1101
1102 **Example1**: Connect to a Low active sensor.
1103
1104 This type of sensor will output a low signal GND when active.
1105
1106 * Connect sensor’s output to DI1-
1107 * Connect sensor’s VCC to DI1+.
1108
1109 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1110
1111 //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1112
1113 If DI1+ = 12v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 12mA , So the LT-22222-L will be able to detect this active signal.
1114
1115
1116 **Example2**: Connect to a High active sensor.
1117
1118 This type of sensor will output a high signal (example 24v) when active.
1119
1120 * Connect sensor’s output to DI1+
1121 * Connect sensor’s GND DI1-.
1122
1123 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1124
1125 //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1126
1127 If DI1+ = 24v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 24mA , So the LT-22222-L will be able to detect this high active signal.
1128
1129
1130 **Example3**: Connect to a 220v high active sensor.公司测试一下
1131
1132 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1133
1134 * Connect sensor’s output to DI1+ with a serial 50K resistor
1135 * Connect sensor’s GND DI1-.
1136
1137 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1138
1139 //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.
1140
1141 If sensor output is 220v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
1142
1143
1144 1.
1145 11.
1146 111. Digital Output Port: DO1/DO2 /DO3
1147
1148 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1149
1150 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1151
1152
1153
1154
1155 1.
1156 11.
1157 111. Analog Input Interface
1158
1159 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:
1160
1161 AC2 = (IN2 voltage )/12
1162
1163 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1164
1165
1166
1167 Example to connect a 4~~20mA sensor
1168
1169 We take the wind speed sensor as an example for reference only.
1170
1171 Specifications of the wind speed sensor:
1172
1173 Red:12~~24v
1174
1175 Yellow:4~~20mA
1176
1177 Black:GND
1178
1179
1180 Connection diagram:
1181
1182 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1183
1184 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1185
1186
1187
1188 1.
1189 11.
1190 111. Relay Output
1191
1192 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:
1193
1194 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1195
1196
1197 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1198
1199
1200
1201
1202
1203 1.
1204 11. LEDs Indicators
1205
1206 (% border="1" style="background-color:#f7faff" %)
1207 |**LEDs**|**Feature**
1208 |**PWR**|Always on if there is power
1209 |**SYS**|After device is powered on, the SYS will **fast blink in GREEN** for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be **on GREEN for 5 seconds. **SYS will **blink Blue** on every upload and **blink Green** once receive a downlink message.
1210 |**TX**|(((
1211 Device boot: TX blinks 5 times.
1212
1213 Successful join network: TX ON for 5 seconds.
1214
1215 Transmit a LoRa packet: TX blinks once
1216 )))
1217 |**RX**|RX blinks once when receive a packet.
1218 |**DO1**|
1219 |**DO2**|
1220 |**DO3**|
1221 |**DI2**|(((
1222 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1223
1224 For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1225 )))
1226 |**DI2**|(((
1227 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1228
1229 For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1230 )))
1231 |**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
1232 |**DI2**|(((
1233 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1234
1235 For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1236 )))
1237 |**RO1**|
1238 |**RO2**|
1239
1240 1. Use AT Command
1241 11. Access AT Command
1242
1243 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.
1244
1245 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1246
1247
1248 In PC, User needs to set **serial tool**(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to **9600** to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:**123456**) to active it. As shown below:
1249
1250 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1251
1252
1253 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/]]
1254
1255 AT+<CMD>?        : Help on <CMD>
1256
1257 AT+<CMD>         : Run <CMD>
1258
1259 AT+<CMD>=<value> : Set the value
1260
1261 AT+<CMD>=?       : Get the value
1262
1263 ATZ: Trig a reset of the MCU
1264
1265 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1266
1267 AT+DEUI: Get or Set the Device EUI
1268
1269 AT+DADDR: Get or Set the Device Address
1270
1271 AT+APPKEY: Get or Set the Application Key
1272
1273 AT+NWKSKEY: Get or Set the Network Session Key
1274
1275 AT+APPSKEY: Get or Set the Application Session Key
1276
1277 AT+APPEUI: Get or Set the Application EUI
1278
1279 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1280
1281 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1282
1283 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1284
1285 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1286
1287 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1288
1289 AT+RX2FQ: Get or Set the Rx2 window frequency
1290
1291 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1292
1293 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1294
1295 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1296
1297 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1298
1299 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1300
1301 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1302
1303 AT+NWKID: Get or Set the Network ID
1304
1305 AT+FCU: Get or Set the Frame Counter Uplink
1306
1307 AT+FCD: Get or Set the Frame Counter Downlink
1308
1309 AT+CLASS: Get or Set the Device Class
1310
1311 AT+JOIN: Join network
1312
1313 AT+NJS: Get OTAA Join Status
1314
1315 AT+SENDB: Send hexadecimal data along with the application port
1316
1317 AT+SEND: Send text data along with the application port
1318
1319 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1320
1321 AT+RECV: Print last received data in raw format
1322
1323 AT+VER: Get current image version and Frequency Band
1324
1325 AT+CFM: Get or Set the confirmation mode (0-1)
1326
1327 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1328
1329 AT+SNR: Get the SNR of the last received packet
1330
1331 AT+RSSI: Get the RSSI of the last received packet
1332
1333 AT+TDC: Get or set the application data transmission interval in ms
1334
1335 AT+PORT: Get or set the application port
1336
1337 AT+DISAT: Disable AT commands
1338
1339 AT+PWORD: Set password, max 9 digits
1340
1341 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1342
1343 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1344
1345 AT+CFG: Print all settings
1346
1347
1348
1349 1.
1350 11. Common AT Command Sequence
1351 111. Multi-channel ABP mode (Use with SX1301/LG308)
1352
1353 If device has not joined network yet:
1354
1355 123456
1356
1357 AT+FDR
1358
1359 123456
1360
1361 AT+NJM=0
1362
1363 ATZ
1364
1365
1366 If device already joined network:
1367
1368 AT+NJM=0
1369
1370 ATZ
1371
1372 1.
1373 11.
1374 111. Single-channel ABP mode (Use with LG01/LG02)
1375
1376 123456   Enter Password to have AT access.
1377
1378 AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1379
1380 123456   Enter Password to have AT access.
1381
1382 AT+CLASS=C Set to work in CLASS C
1383
1384 AT+NJM=0 Set to ABP mode
1385
1386 AT+ADR=0 Set the Adaptive Data Rate Off
1387
1388 AT+DR=5  Set Data Rate
1389
1390 AT+TDC=60000  Set transmit interval to 60 seconds
1391
1392 AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1393
1394 AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1395
1396 AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1397
1398 AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1399
1400 ATZ          Reset MCU
1401
1402 **Note:**
1403
1404 1. Make sure the device is set to ABP mode in the IoT Server.
1405 1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1406 1. 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.
1407 1. 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
1408
1409 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]
1410
1411
1412 1.
1413 11.
1414 111. Change to Class A
1415
1416 If sensor JOINED
1417
1418 AT+CLASS=A
1419
1420 ATZ
1421
1422
1423
1424
1425
1426 1. FAQ
1427
1428 1.
1429 11. How to upgrade the image?
1430
1431 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1432
1433 * Support new features
1434 * For bug fix
1435 * Change LoRaWAN bands.
1436
1437 Below shows the hardware connection for how to upload an image to the LT:
1438
1439 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1440
1441
1442 **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]].
1443
1444 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1445
1446 **Step3: **Open flashloader; choose the correct COM port to update.
1447
1448 **For LT-33222-L**:
1449
1450 Hold down the PRO button and then momentarily press the RST reset button and the **DO2 led** will change from OFF to ON. When **DO2 LED** is on, it means the device is in download mode.
1451
1452 **For LT-22222-L**:
1453
1454 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.
1455
1456
1457
1458 |(((
1459 Board detected
1460 )))
1461
1462 |(((
1463
1464 )))
1465
1466 [[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]]
1467
1468
1469
1470 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]]
1471
1472
1473 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image037.png]]
1474
1475
1476 **Notice**: In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:
1477
1478 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image038.png]]
1479
1480
1481 1.
1482 11. How to change the LoRa Frequency Bands/Region?
1483
1484 User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1485
1486
1487 1.
1488 11. How to set up LT to work with Single Channel Gateway such as LG01/LG02?
1489
1490 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1491
1492 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1493
1494
1495 **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.
1496
1497 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image039.png]]
1498
1499 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.
1500
1501
1502 **Step2: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1503
1504 123456   Enter Password to have AT access.
1505
1506 AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1507
1508 123456   Enter Password to have AT access.
1509
1510 AT+NJM=0 Set to ABP mode
1511
1512 AT+ADR=0 Set the Adaptive Data Rate Off
1513
1514 AT+DR=5  Set Data Rate (Set AT+DR=3 for 915 band)
1515
1516 AT+TDC=60000  Set transmit interval to 60 seconds
1517
1518 AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1519
1520 AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1
1521
1522 ATZ                Reset MCU
1523
1524 As shown in below:
1525
1526 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image040.png]]
1527
1528
1529
1530 1.
1531 11. Can I see counting event in Serial?
1532
1533 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.
1534
1535
1536
1537
1538 1. Trouble Shooting     
1539 11. Downlink doesn’t work, how to solve it?
1540
1541 Please see this link for how to debug:
1542
1543 [[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]]
1544
1545
1546 1.
1547 11. Have trouble to upload image.
1548
1549 See this link for trouble shooting:
1550
1551 [[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]]
1552
1553
1554 1.
1555 11. Why I can’t join TTN in US915 /AU915 bands?
1556
1557 It might be about the channels mapping. Please see this link for detail:
1558
1559 [[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]]
1560
1561
1562
1563
1564 1. Order Info
1565
1566 **For LT-33222-L-XXX or LT-22222-L-XXX:**
1567
1568 **XXX:**
1569
1570 * **EU433**: LT with frequency bands EU433
1571 * **EU868**: LT with frequency bands EU868
1572 * **KR920**: LT with frequency bands KR920
1573 * **CN470**: LT with frequency bands CN470
1574 * **AS923**: LT with frequency bands AS923
1575 * **AU915**: LT with frequency bands AU915
1576 * **US915**: LT with frequency bands US915
1577 * **IN865**: LT with frequency bands IN865
1578 * **CN779**: LT with frequency bands CN779
1579
1580 1. Packing Info
1581
1582 **Package Includes**:
1583
1584 * LT I/O Controller x 1
1585 * Stick Antenna for LoRa RF part x 1
1586 * Bracket for controller x1
1587 * Program cable x 1
1588
1589 **Dimension and weight**:
1590
1591 * Device Size: 13.5 x 7 x 3 cm
1592 * Device Weight: 105g
1593 * Package Size / pcs : 14.5 x 8 x 5 cm
1594 * Weight / pcs : 170g
1595
1596 1. Support
1597
1598 * 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.
1599 * 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
1600
1601 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]