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Version 66.27 by Xiaoling on 2022/05/24 14:07
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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 (((
49 **Hardware System:**
50 )))
51
52 * (((
53 STM32L072CZT6 MCU
54 )))
55 * (((
56 SX1276/78 Wireless Chip 
57 )))
58 * (((
59 (((
60 Power Consumption:
61 )))
62
63 * (((
64 Idle: 4mA@12v
65 )))
66 * (((
67 20dB Transmit: 34mA@12v
68 )))
69 )))
70
71 (((
72 **Interface for Model: LT22222-L:**
73 )))
74
75 * (((
76 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
77 )))
78 * (((
79 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
80 )))
81 * (((
82 2 x Relay Output (5A@250VAC / 30VDC)
83 )))
84 * (((
85 2 x 0~~20mA Analog Input (res:0.01mA)
86 )))
87 * (((
88 2 x 0~~30V Analog Input (res:0.01v)
89 )))
90 * (((
91 Power Input 7~~ 24V DC. 
92 )))
93
94 (((
95 **LoRa Spec:**
96 )))
97
98 * (((
99 (((
100 Frequency Range:
101 )))
102
103 * (((
104 Band 1 (HF): 862 ~~ 1020 Mhz
105 )))
106 * (((
107 Band 2 (LF): 410 ~~ 528 Mhz
108 )))
109 )))
110 * (((
111 168 dB maximum link budget.
112 )))
113 * (((
114 +20 dBm - 100 mW constant RF output vs.
115 )))
116 * (((
117 +14 dBm high efficiency PA.
118 )))
119 * (((
120 Programmable bit rate up to 300 kbps.
121 )))
122 * (((
123 High sensitivity: down to -148 dBm.
124 )))
125 * (((
126 Bullet-proof front end: IIP3 = -12.5 dBm.
127 )))
128 * (((
129 Excellent blocking immunity.
130 )))
131 * (((
132 Low RX current of 10.3 mA, 200 nA register retention.
133 )))
134 * (((
135 Fully integrated synthesizer with a resolution of 61 Hz.
136 )))
137 * (((
138 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
139 )))
140 * (((
141 Built-in bit synchronizer for clock recovery.
142 )))
143 * (((
144 Preamble detection.
145 )))
146 * (((
147 127 dB Dynamic Range RSSI.
148 )))
149 * (((
150 Automatic RF Sense and CAD with ultra-fast AFC.
151 )))
152 * (((
153 Packet engine up to 256 bytes with CRC.
154 )))
155
156 == 1.3 Features ==
157
158 * LoRaWAN Class A & Class C protocol
159 * Optional Customized LoRa Protocol
160 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
161 * AT Commands to change parameters
162 * Remote configure parameters via LoRa Downlink
163 * Firmware upgradable via program port
164 * Counting
165
166 == 1.4  Applications ==
167
168 * Smart Buildings & Home Automation
169 * Logistics and Supply Chain Management
170 * Smart Metering
171 * Smart Agriculture
172 * Smart Cities
173 * Smart Factory
174
175 == 1.5 Hardware Variants ==
176
177 (% border="1" style="background-color:#f7faff; width:500px" %)
178 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
179 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
180 * 2 x Digital Input (Bi-direction)
181 * 2 x Digital Output
182 * 2 x Relay Output (5A@250VAC / 30VDC)
183 * 2 x 0~~20mA Analog Input (res:0.01mA)
184 * 2 x 0~~30V Analog Input (res:0.01v)
185 * 1 x Counting Port
186 )))
187
188 = 2. Power ON Device =
189
190 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.
191
192 (((
193 PWR will on when device is properly powered.
194 )))
195
196 [[image:1653297104069-180.png]]
197
198 = 3. Operation Mode =
199
200 == 3.1 How it works? ==
201
202 (((
203 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. 
204 )))
205
206 (((
207 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:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H4.UseATCommand]] to set the keys in the devices.
208 )))
209
210 (((
211 3.2 Example to join LoRaWAN network
212 )))
213
214 (((
215 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. 
216 )))
217
218 [[image:image-20220523172350-1.png||height="266" width="864"]]
219
220
221 (((
222 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:
223 )))
224
225 (((
226 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
227 )))
228
229 (((
230 Each LT is shipped with a sticker with the default device EUI as below:
231 )))
232
233 [[image:1653297924498-393.png]]
234
235 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
236
237 Add APP EUI in the application.
238
239 [[image:1653297955910-247.png||height="321" width="716"]]
240
241 Add APP KEY and DEV EUI
242
243 [[image:1653298023685-319.png]]
244
245 (((
246 **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.
247 )))
248
249 [[image:1653298044601-602.png||height="405" width="709"]]
250
251 == 3.3 Uplink Payload ==
252
253 There are five working modes + one interrupt mode on LT for different type application:
254
255 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
256 * **MOD2**: Double DI Counting + DO + RO
257 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
258 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
259 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
260 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
261
262 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
263
264 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
265
266 [[image:image-20220523174024-3.png]]
267
268 (((
269 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
270 )))
271
272 [[image:image-20220523174254-4.png]]
273
274 * RO is for relay. ROx=1 : close，ROx=0 always open.
275 * DI is for digital input. DIx=1: high or float, DIx=0: low.
276 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
277
278 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
279
280 For example if payload is: [[image:image-20220523175847-2.png]]
281
282 **The value for the interface is:  **
283
284 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
285
286 AVI2 channel voltage is 0x04AC/1000=1.196V
287
288 ACI1 channel current is 0x1310/1000=4.880mA
289
290 ACI2 channel current is 0x1300/1000=4.864mA
291
292 The last byte 0xAA= 10101010(B) means
293
294 * [1] RO1 relay channel is close and the RO1 LED is ON.
295 * [0] RO2 relay channel is open and RO2 LED is OFF;
296
297 **LT22222-L:**
298
299 * [1] DI2 channel is high input and DI2 LED is ON;
300 * [0] DI1 channel is low input;
301
302 * [0] DO3 channel output state
303 ** DO3 is float in case no load between DO3 and V+.;
304 ** DO3 is high in case there is load between DO3 and V+.
305 ** DO3 LED is off in both case
306 * [1] DO2 channel output is low and DO2 LED is ON.
307 * [0] DO1 channel output state
308 ** DO1 is float in case no load between DO1 and V+.;
309 ** DO1 is high in case there is load between DO1 and V+.
310 ** DO1 LED is off in both case
311
312 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
313
314 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
315
316 (((
317 Total : 11 bytes payload
318 )))
319
320 [[image:image-20220523180452-3.png]]
321
322 (((
323 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
324 )))
325
326 [[image:image-20220523180506-4.png]]
327
328 * RO is for relay. ROx=1 : close，ROx=0 always open.
329 * FIRST: Indicate this is the first packet after join network.
330 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
331
332 (((
333 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
334 )))
335
336 (((
337 **To use counting mode, please run:**
338 )))
339
340 (% class="box infomessage" %)
341 (((
342 (((
343 **AT+MOD=2**
344 )))
345 )))
346
347 (% class="box infomessage" %)
348 (((
349 (((
350 **ATZ**
351 )))
352 )))
353
354 (((
355 (% style="color:#4f81bd" %)**AT Commands for counting:**
356 )))
357
358 (((
359 **For LT22222-L:**
360 )))
361
362 (% class="box infomessage" %)
363 (((
364 (((
365 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
366 )))
367 )))
368
369 (% class="box infomessage" %)
370 (((
371 (((
372 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
373 )))
374 )))
375
376 (% class="box infomessage" %)
377 (((
378 (((
379 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
380 )))
381 )))
382
383 (% class="box infomessage" %)
384 (((
385 (((
386 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
387 )))
388 )))
389
390 (% class="box infomessage" %)
391 (((
392 (((
393 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
394 )))
395 )))
396
397 (% class="box infomessage" %)
398 (((
399 (((
400 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
401 )))
402 )))
403
404 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
405
406 **LT22222-L**: This mode the DI1 is used as a counting pin.
407
408 [[image:image-20220523181246-5.png]]
409
410 (((
411 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
412 )))
413
414 [[image:image-20220523181301-6.png]]
415
416 * RO is for relay. ROx=1 : close，ROx=0 always open.
417 * FIRST: Indicate this is the first packet after join network.
418 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
419
420 (((
421 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
422 )))
423
424 (((
425 **To use counting mode, please run:**
426 )))
427
428 (% class="box infomessage" %)
429 (((
430 (((
431 **AT+MOD=3**
432 )))
433 )))
434
435 (% class="box infomessage" %)
436 (((
437 (((
438 **ATZ**
439 )))
440 )))
441
442 (((
443 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
444 )))
445
446 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
447
448 **LT22222-L**: This mode the DI1 is used as a counting pin.
449
450 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.
451
452 [[image:image-20220523181903-8.png]]
453
454 (((
455 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
456 )))
457
458 [[image:image-20220523181727-7.png]]
459
460 * RO is for relay. ROx=1 : close，ROx=0 always open.
461 * FIRST: Indicate this is the first packet after join network.
462 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
463
464 (((
465 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
466 )))
467
468 (((
469 **To use this mode, please run:**
470 )))
471
472 (% class="box infomessage" %)
473 (((
474 (((
475 **AT+MOD=4**
476 )))
477 )))
478
479 (% class="box infomessage" %)
480 (((
481 (((
482 **ATZ**
483 )))
484 )))
485
486 (((
487
488 )))
489
490 (((
491 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
492 )))
493
494 (((
495 **Plus below command for AVI1 Counting:**
496 )))
497
498 (% class="box infomessage" %)
499 (((
500 (((
501 **AT+SETCNT=3,60   (set AVI Count to 60)**
502 )))
503 )))
504
505 (% class="box infomessage" %)
506 (((
507 (((
508 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
509 )))
510 )))
511
512 (% class="box infomessage" %)
513 (((
514 (((
515 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
516 )))
517 )))
518
519 (% class="box infomessage" %)
520 (((
521 (((
522 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
523 )))
524 )))
525
526 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
527
528 **LT22222-L**: This mode the DI1 is used as a counting pin.
529
530 [[image:image-20220523182334-9.png]]
531
532 (((
533 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
534 )))
535
536 * RO is for relay. ROx=1 : close，ROx=0 always open.
537 * FIRST: Indicate this is the first packet after join network.
538 * (((
539 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
540 )))
541
542 (((
543 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
544 )))
545
546 (((
547 **To use this mode, please run:**
548 )))
549
550 (% class="box infomessage" %)
551 (((
552 (((
553 **AT+MOD=5**
554 )))
555 )))
556
557 (% class="box infomessage" %)
558 (((
559 (((
560 **ATZ**
561 )))
562 )))
563
564 (((
565 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
566 )))
567
568 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
569
570 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
571
572 For example, if user has configured below commands:
573
574 * **AT+MOD=1 ** **~-~->** The normal working mode
575 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
576
577 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
578
579 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
580 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.**
581
582 **AT Command to set Trigger Condition**:
583
584 (% style="color:#4f81bd" %)**Trigger base on voltage**:
585
586 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
587
588 **Example:**
589
590 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)
591
592 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
593
594 (% style="color:#4f81bd" %)**Trigger base on current**:
595
596 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
597
598 **Example:**
599
600 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
601
602 (% style="color:#4f81bd" %)**Trigger base on DI status**:
603
604 DI status trigger Flag.
605
606 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
607
608 **Example:**
609
610 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
611
612
613 **Downlink Command to set Trigger Condition**
614
615 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
616
617 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
618
619 AA: Code for this downlink Command:
620
621 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
622
623 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
624
625 yy2 yy2: AC1 or AV1 high limit.
626
627 yy3 yy3: AC2 or AV2 low limit.
628
629 Yy4 yy4: AC2 or AV2 high limit.
630
631 **Example1**: AA 00 13 88 00 00 00 00 00 00
632
633 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
634
635 **Example2**: AA 02 01 00
636
637 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
638
639 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
640
641 MOD6 Payload : total 11 bytes payload
642
643 [[image:image-20220524085923-1.png]]
644
645 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
646
647 [[image:image-20220524090106-2.png]]
648
649 * Each bits shows if the corresponding trigger has been configured.
650
651 **Example:**
652
653 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
654
655
656 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
657
658 [[image:image-20220524090249-3.png]]
659
660 * Each bits shows which status has been trigger on this uplink.
661
662 **Example:**
663
664 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
665
666
667 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
668
669 [[image:image-20220524090456-4.png]]
670
671 * Each bits shows which status has been trigger on this uplink.
672
673 **Example:**
674
675 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
676
677 00000101: Means both DI1 and DI2 trigger are enabled.
678
679
680 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
681
682 Downlink command to poll MOD6 status:
683
684 **AB 06**
685
686 When device got this command, it will send the MOD6 payload.
687
688 === 3.3.7 Payload Decoder ===
689
690 (((
691 **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/]]
692 )))
693
694 == 3.4 ​Configure LT via AT or Downlink ==
695
696 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
697
698 (((
699 There are two kinds of Commands:
700 )))
701
702 * (% 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
703
704 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
705
706 === 3.4.1 Common Commands ===
707
708 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/]]
709
710 === 3.4.2 Sensor related commands ===
711
712 ==== 3.4.2.1 Set Transmit Interval ====
713
714 Set device uplink interval.
715
716 * AT Command:
717
718 (% class="box infomessage" %)
719 (((
720 **AT+TDC=N **
721 )))
722
723 **Example: **AT+TDC=30000. Means set interval to 30 seconds
724
725 * Downlink Payload (prefix 0x01):
726
727 (% class="box infomessage" %)
728 (((
729 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
730 )))
731
732 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
733
734 Set work mode.
735
736 * AT Command:
737
738 (% class="box infomessage" %)
739 (((
740 **AT+MOD=N  **
741 )))
742
743 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
744
745 * Downlink Payload (prefix 0x0A):
746
747 (% class="box infomessage" %)
748 (((
749 **0x0A aa     ~/~/ Same as AT+MOD=aa**
750 )))
751
752 ==== 3.4.2.3 Poll an uplink ====
753
754 * AT Command:
755
756 There is no AT Command to poll uplink
757
758 * Downlink Payload (prefix 0x08):
759
760 (% class="box infomessage" %)
761 (((
762 **0x08 FF     ~/~/ Poll an uplink,**
763 )))
764
765 **Example**: 0x08FF, ask device to send an Uplink
766
767 ==== 3.4.2.4 Enable Trigger Mode ====
768
769 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]]
770
771 * AT Command:
772
773 (% class="box infomessage" %)
774 (((
775 **AT+ADDMOD6=1 or 0**
776 )))
777
778 1: Enable Trigger Mode
779
780 0: Disable Trigger Mode
781
782 * Downlink Payload (prefix 0x0A 06):
783
784 (% class="box infomessage" %)
785 (((
786 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
787 )))
788
789 ==== 3.4.2.5 Poll trigger settings ====
790
791 Poll trigger settings,
792
793 * AT Command:
794
795 There is no AT Command for this feature.
796
797 * Downlink Payload (prefix 0x AB 06):
798
799 (% class="box infomessage" %)
800 (((
801 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
802 )))
803
804 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
805
806 Enable Disable DI1/DI2/DI2 as trigger,
807
808 * AT Command:
809
810 (% class="box infomessage" %)
811 (((
812 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
813 )))
814
815 **Example:**
816
817 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
818
819 * Downlink Payload (prefix 0xAA 02):
820
821 (% class="box infomessage" %)
822 (((
823 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
824 )))
825
826 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
827
828 Set DI1 or DI3(for LT-33222-L) trigger.
829
830 * AT Command:
831
832 (% class="box infomessage" %)
833 (((
834 **AT+TRIG1=a,b**
835 )))
836
837 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
838
839 b : delay timing.
840
841 **Example:**
842
843 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
844
845 * Downlink Payload (prefix 0x09 01 ):
846
847 (% class="box infomessage" %)
848 (((
849 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
850 )))
851
852 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
853
854 Set DI2 trigger.
855
856 * AT Command:
857
858 (% class="box infomessage" %)
859 (((
860 **AT+TRIG2=a,b**
861 )))
862
863 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
864
865 b : delay timing.
866
867 **Example:**
868
869 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
870
871 * Downlink Payload (prefix 0x09 02 ):
872
873 (% class="box infomessage" %)
874 (((
875 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
876 )))
877
878 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
879
880 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]]
881
882 * AT Command:
883
884 (% class="box infomessage" %)
885 (((
886 **AT+ACLIM. **
887 )))
888
889 * Downlink Payload (prefix 0xAA 01 ):
890
891 (% class="box infomessage" %)
892 (((
893 **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]]**
894 )))
895
896 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
897
898 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]]
899
900 * AT Command:
901
902 (% class="box infomessage" %)
903 (((
904 **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]]**
905 )))
906
907 * Downlink Payload (prefix 0xAA 00 ):
908
909 (% class="box infomessage" %)
910 (((
911 **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]] **
912 )))
913
914 ==== 3.4.2.11 Trigger – Set minimum interval ====
915
916 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
917
918 * AT Command:
919
920 (% class="box infomessage" %)
921 (((
922 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
923 )))
924
925 * Downlink Payload (prefix 0xAC ):
926
927 (% class="box infomessage" %)
928 (((
929 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
930 )))
931
932 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
933
934 * AT Command:
935
936 There is no AT Command to control Digital Output
937
938 * Downlink Payload (prefix 0x02):
939
940 (% class="box infomessage" %)
941 (((
942 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
943 )))
944
945 (((
946 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
947 )))
948
949 (((
950 01: Low,  00: High ,  11: No action
951 )))
952
953 [[image:image-20220524092754-5.png]]
954
955 (((
956 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
957 )))
958
959 (((
960 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
961 )))
962
963
964 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
965
966 * AT Command:
967
968 There is no AT Command to control Digital Output
969
970 * Downlink Payload (prefix 0xA9):
971
972 (% class="box infomessage" %)
973 (((
974 (((
975 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
976 )))
977 )))
978
979 This is to control the digital output time of DO pin. Include four bytes:
980
981 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
982
983 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
984
985 01: DO pins will change back to original state after timeout.
986
987 00: DO pins will change to an inverter state after timeout 
988
989 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
990
991 [[image:image-20220524093238-6.png]]
992
993 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
994
995 [[image:image-20220524093328-7.png]]
996
997 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
998
999 [[image:image-20220524093351-8.png]]
1000
1001 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1002
1003 Latching time. Unit: ms
1004
1005 Device will upload a packet if downlink code executes successfully.
1006
1007 **Example payload:**
1008
1009 **~1. A9 01 01 01 01 07 D0**
1010
1011 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1012
1013 **2. A9 01 00 01 11 07 D0**
1014
1015 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1016
1017 **3. A9 00 00 00 00 07 D0**
1018
1019 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1020
1021 **4. A9 00 11 01 00 07 D0**
1022
1023 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
1024
1025
1026 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1027
1028 * AT Command:
1029
1030 There is no AT Command to control Relay Output
1031
1032 * Downlink Payload (prefix 0x03):
1033
1034 (% class="box infomessage" %)
1035 (((
1036 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1037 )))
1038
1039 (((
1040 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1041 )))
1042
1043 (((
1044 01: Close ,  00: Open , 11: No action
1045 )))
1046
1047 (((
1048 [[image:image-20220524093724-9.png]]
1049 )))
1050
1051 Device will upload a packet if downlink code executes successfully.
1052
1053
1054 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1055
1056 * AT Command:
1057
1058 There is no AT Command to control Relay Output
1059
1060 * Downlink Payload (prefix 0x05):
1061
1062 (% class="box infomessage" %)
1063 (((
1064 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1065 )))
1066
1067 This is to control the relay output time of relay. Include four bytes:
1068
1069 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1070
1071 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1072
1073 01: Relays will change back to original state after timeout.
1074
1075 00: Relays will change to an inverter state after timeout
1076
1077 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1078
1079 [[image:image-20220524093831-10.png]]
1080
1081 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1082
1083 Device will upload a packet if downlink code executes successfully.
1084
1085 **Example payload:**
1086
1087 **~1. 05 01 11 07 D0**
1088
1089 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1090
1091 **2. 05 01 10 07 D0**
1092
1093 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1094
1095 **3. 05 00 01 07 D0**
1096
1097 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1098
1099 **4. 05 00 00 07 D0**
1100
1101 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1102
1103
1104 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1105
1106 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]]
1107
1108 * AT Command:
1109
1110 (% class="box infomessage" %)
1111 (((
1112 **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]]**
1113 )))
1114
1115 * Downlink Payload (prefix 0xA5):
1116
1117 (% class="box infomessage" %)
1118 (((
1119 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1120 )))
1121
1122 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1123
1124 * AT Command:
1125
1126 (% class="box infomessage" %)
1127 (((
1128 **AT+SETCNT=aa,(bb cc dd ee) **
1129 )))
1130
1131 aa: 1: Set count1,
1132
1133 2: Set count2,
1134
1135 3: Set AV1 count
1136
1137 Bb cc dd ee: number to be set
1138
1139 * Downlink Payload (prefix 0xA8):
1140
1141 (% class="box infomessage" %)
1142 (((
1143 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1144 )))
1145
1146 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1147
1148 Clear counting for counting mode
1149
1150 * AT Command:
1151
1152 (% class="box infomessage" %)
1153 (((
1154 **AT+CLRCOUNT ~/~/ clear all counting**
1155 )))
1156
1157 * Downlink Payload (prefix 0xA6):
1158
1159 (% class="box infomessage" %)
1160 (((
1161 **0x A6 01     ~/~/ clear all counting,**
1162 )))
1163
1164 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1165
1166 * AT Command:
1167
1168 (% class="box infomessage" %)
1169 (((
1170 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1171 )))
1172
1173 * Downlink Payload (prefix 0xA7):
1174
1175 (% class="box infomessage" %)
1176 (((
1177 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1178 )))
1179
1180 range: aa bb cc:0 to 16777215,  (unit:second)
1181
1182 == 3.5 Integrate with Mydevice ==
1183
1184 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:
1185
1186 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1187
1188 **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:
1189
1190 [[image:1653356737703-362.png||height="232" width="732"]]
1191
1192 [[image:image-20220524094641-11.png||height="390" width="723"]]
1193
1194 [[image:image-20220524094641-12.png||height="402" width="718"]]
1195
1196 **Step 3**: Create an account or log in Mydevices.
1197
1198 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1199
1200 Search under The things network
1201
1202 [[image:1653356838789-523.png||height="337" width="740"]]
1203
1204 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1205
1206 [[image:image-20220524094909-1.png||height="335" width="729"]]
1207
1208 [[image:image-20220524094909-2.png||height="337" width="729"]]
1209
1210 [[image:image-20220524094909-3.png||height="338" width="727"]]
1211
1212 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1213
1214 [[image:image-20220524094909-5.png||height="341" width="734"]]
1215
1216 == 3.6 Interface Detail ==
1217
1218 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1219
1220 Support NPN Type sensor
1221
1222 [[image:1653356991268-289.png]]
1223
1224 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1225
1226 (((
1227 The DI port of LT-22222-L can support NPN or PNP output sensor.
1228 )))
1229
1230 (((
1231 (((
1232 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
1233 )))
1234 )))
1235
1236 [[image:1653357170703-587.png]]
1237
1238 (((
1239 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1240 )))
1241
1242
1243 **Example1**: Connect to a Low active sensor.
1244
1245 This type of sensor will output a low signal GND when active.
1246
1247 * Connect sensor’s output to DI1-
1248 * Connect sensor’s VCC to DI1+.
1249
1250 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1251
1252 [[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.**
1253
1254 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1255
1256
1257 **Example2**: Connect to a High active sensor.
1258
1259 This type of sensor will output a high signal (example 24v) when active.
1260
1261 * Connect sensor’s output to DI1+
1262 * Connect sensor’s GND DI1-.
1263
1264 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1265
1266 [[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.**
1267
1268 If **DI1+ = 24v**, the [[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.
1269
1270
1271 **Example3**: Connect to a 220v high active sensor.
1272
1273 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1274
1275 * Connect sensor’s output to DI1+ with a serial 50K resistor
1276 * Connect sensor’s GND DI1-.
1277
1278 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1279
1280 [[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.**
1281
1282 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.
1283
1284 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1285
1286 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1287
1288 [[image:1653357531600-905.png]]
1289
1290 === 3.6.4 Analog Input Interface ===
1291
1292 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:
1293
1294 **AC2 = (IN2 voltage )/12**
1295
1296 [[image:1653357592296-182.png]]
1297
1298 Example to connect a 4~~20mA sensor
1299
1300 We take the wind speed sensor as an example for reference only.
1301
1302 Specifications of the wind speed sensor:
1303
1304 Red:12~~24v
1305
1306 Yellow:4~~20mA
1307
1308 Black:GND
1309
1310
1311 Connection diagram:
1312
1313 [[image:1653357640609-758.png]]
1314
1315 [[image:1653357648330-671.png||height="155" width="733"]]
1316
1317 === 3.6.5 Relay Output ===
1318
1319 (((
1320 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:
1321 )))
1322
1323 [[image:image-20220524100215-9.png]]
1324
1325 [[image:image-20220524100215-10.png||height="382" width="723"]]
1326
1327 == 3.7 LEDs Indicators ==
1328
1329 [[image:image-20220524100748-11.png]]
1330
1331 = 4. Use AT Command =
1332
1333 == 4.1 Access AT Command ==
1334
1335 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.
1336
1337 [[image:1653358238933-385.png]]
1338
1339 (((
1340 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:
1341 )))
1342
1343 [[image:1653358355238-883.png]]
1344
1345 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/]]
1346
1347 (((
1348 AT+<CMD>?        : Help on <CMD>
1349 )))
1350
1351 (((
1352 AT+<CMD>         : Run <CMD>
1353 )))
1354
1355 (((
1356 AT+<CMD>=<value> : Set the value
1357 )))
1358
1359 (((
1360 AT+<CMD>=?       : Get the value
1361 )))
1362
1363 (((
1364 ATZ: Trig a reset of the MCU
1365 )))
1366
1367 (((
1368 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1369 )))
1370
1371 (((
1372 AT+DEUI: Get or Set the Device EUI
1373 )))
1374
1375 (((
1376 AT+DADDR: Get or Set the Device Address
1377 )))
1378
1379 (((
1380 AT+APPKEY: Get or Set the Application Key
1381 )))
1382
1383 (((
1384 AT+NWKSKEY: Get or Set the Network Session Key
1385 )))
1386
1387 (((
1388 AT+APPSKEY: Get or Set the Application Session Key
1389 )))
1390
1391 (((
1392 AT+APPEUI: Get or Set the Application EUI
1393 )))
1394
1395 (((
1396 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1397 )))
1398
1399 (((
1400 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1401 )))
1402
1403 (((
1404 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1405 )))
1406
1407 (((
1408 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1409 )))
1410
1411 (((
1412 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1413 )))
1414
1415 (((
1416 AT+RX2FQ: Get or Set the Rx2 window frequency
1417 )))
1418
1419 (((
1420 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1421 )))
1422
1423 (((
1424 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1425 )))
1426
1427 (((
1428 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1429 )))
1430
1431 (((
1432 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1433 )))
1434
1435 (((
1436 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1437 )))
1438
1439 (((
1440 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1441 )))
1442
1443 (((
1444 AT+NWKID: Get or Set the Network ID
1445 )))
1446
1447 (((
1448 AT+FCU: Get or Set the Frame Counter Uplink
1449 )))
1450
1451 (((
1452 AT+FCD: Get or Set the Frame Counter Downlink
1453 )))
1454
1455 (((
1456 AT+CLASS: Get or Set the Device Class
1457 )))
1458
1459 (((
1460 AT+JOIN: Join network
1461 )))
1462
1463 (((
1464 AT+NJS: Get OTAA Join Status
1465 )))
1466
1467 (((
1468 AT+SENDB: Send hexadecimal data along with the application port
1469 )))
1470
1471 (((
1472 AT+SEND: Send text data along with the application port
1473 )))
1474
1475 (((
1476 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1477 )))
1478
1479 (((
1480 AT+RECV: Print last received data in raw format
1481 )))
1482
1483 (((
1484 AT+VER: Get current image version and Frequency Band
1485 )))
1486
1487 (((
1488 AT+CFM: Get or Set the confirmation mode (0-1)
1489 )))
1490
1491 (((
1492 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1493 )))
1494
1495 (((
1496 AT+SNR: Get the SNR of the last received packet
1497 )))
1498
1499 (((
1500 AT+RSSI: Get the RSSI of the last received packet
1501 )))
1502
1503 (((
1504 AT+TDC: Get or set the application data transmission interval in ms
1505 )))
1506
1507 (((
1508 AT+PORT: Get or set the application port
1509 )))
1510
1511 (((
1512 AT+DISAT: Disable AT commands
1513 )))
1514
1515 (((
1516 AT+PWORD: Set password, max 9 digits
1517 )))
1518
1519 (((
1520 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1521 )))
1522
1523 (((
1524 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1525 )))
1526
1527 (((
1528 AT+CFG: Print all settings
1529 )))
1530
1531 == 4.2 Common AT Command Sequence ==
1532
1533 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1534
1535 (((
1536 If device has not joined network yet:
1537 )))
1538
1539 (((
1540 (% style="background-color:#dcdcdc" %)123456
1541 )))
1542
1543 (((
1544 (% style="background-color:#dcdcdc" %)AT+FDR
1545 )))
1546
1547 (((
1548 (% style="background-color:#dcdcdc" %)123456
1549 )))
1550
1551 (((
1552 (% style="background-color:#dcdcdc" %)AT+NJM=0
1553 )))
1554
1555 (((
1556 (% style="background-color:#dcdcdc" %)ATZ
1557 )))
1558
1559
1560 (((
1561 If device already joined network:
1562 )))
1563
1564 (((
1565 (% style="background-color:#dcdcdc" %)AT+NJM=0
1566 )))
1567
1568 (((
1569 (% style="background-color:#dcdcdc" %)ATZ
1570 )))
1571
1572 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1573
1574 (((
1575 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1576 )))
1577
1578 (((
1579 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1580 )))
1581
1582 (((
1583 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1584 )))
1585
1586 (((
1587 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1588 )))
1589
1590 (((
1591 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1592 )))
1593
1594 (((
1595 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1596 )))
1597
1598 (((
1599 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1600 )))
1601
1602 (((
1603 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1604 )))
1605
1606 (((
1607 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1608 )))
1609
1610 (((
1611 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1612 )))
1613
1614 (((
1615 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1616 )))
1617
1618 (((
1619 (% 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.
1620 )))
1621
1622 (((
1623 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1624 )))
1625
1626 (((
1627 (% style="color:red" %)**Note:**
1628 )))
1629
1630 (((
1631 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1632 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1633 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.
1634 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
1635 )))
1636
1637 (((
1638 [[image:1653359097980-169.png||height="188" width="729"]]
1639 )))
1640
1641 (((
1642
1643 )))
1644
1645 === 4.2.3 Change to Class A ===
1646
1647 If sensor JOINED
1648 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1649 ATZ
1650
1651 = 5. FAQ =
1652
1653 == 5.1 How to upgrade the image? ==
1654
1655 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1656
1657 * Support new features
1658 * For bug fix
1659 * Change LoRaWAN bands.
1660 Below shows the hardware connection for how to upload an image to the LT:
1661 * [[image:1653359603330-121.png]]
1662
1663 (((
1664 **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]].
1665 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1666 **Step3: **Open flashloader; choose the correct COM port to update.
1667 **For LT-22222-L**:
1668 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.
1669 )))
1670
1671 [[image:image-20220524103407-12.png]]
1672
1673 [[image:image-20220524103429-13.png]]
1674
1675 [[image:image-20220524104033-15.png]]
1676
1677 (% 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:
1678
1679 [[image:1653360054704-518.png||height="186" width="745"]]
1680
1681 (((
1682 (((
1683 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1684 )))
1685 )))
1686
1687 (((
1688 User can follow the introduction for [[how to upgrade image>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H5.1Howtoupgradetheimage3F]]. When download the images, choose the required image file for download.
1689 )))
1690
1691 (((
1692 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1693 )))
1694
1695 (((
1696 (((
1697 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1698 )))
1699 )))
1700
1701 (((
1702 (((
1703 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1704 )))
1705 )))
1706
1707 (((
1708 (% style="color:#4f81bd" %)**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.
1709 )))
1710
1711 (((
1712 [[image:1653360231087-571.png||height="401" width="727"]]
1713 )))
1714
1715 (((
1716 (% style="color:red" %)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.
1717 )))
1718
1719 (((
1720 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1721 )))
1722
1723 (((
1724 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1725 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1726 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1727 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1728 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1729 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1730 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1731 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1732 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1733 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1734 )))
1735
1736 (((
1737 As shown in below:
1738 )))
1739
1740 [[image:1653360498588-932.png||height="485" width="726"]]
1741
1742 == 5.4 Can I see counting event in Serial? ==
1743
1744 (((
1745 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.
1746 )))
1747
1748 (((
1749 = 6. Trouble Shooting =
1750 )))
1751
1752 (((
1753 (((
1754 == 6.1 Downlink doesn’t work, how to solve it? ==
1755 )))
1756 )))
1757
1758 (((
1759 Please see this link for how to debug:
1760
1761 [[http:~~/~~/8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/>>http://8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/]]
1762 )))
1763
1764 (((
1765 [[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]]
1766 )))
1767
1768 (((
1769 == 6.2 Have trouble to upload image. ==
1770 )))
1771
1772 (((
1773 See this link for trouble shooting:
1774 )))
1775
1776 (((
1777 [[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]]
1778 )))
1779
1780 (((
1781 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1782 )))
1783
1784 (((
1785 It might be about the channels mapping. Please see this link for detail:
1786 )))
1787
1788 (((
1789 [[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]]
1790 )))
1791
1792 (((
1793 = 7. Order Info =
1794 )))
1795
1796 (((
1797 (((
1798 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1799 )))
1800 )))
1801
1802 (((
1803 (((
1804 (% style="color:#4f81bd" %)**XXX:**
1805 )))
1806 )))
1807
1808 (((
1809 * (((
1810 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1811 )))
1812 )))
1813
1814 (((
1815 * (((
1816 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1817 )))
1818 )))
1819
1820 (((
1821 * (((
1822 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1823 )))
1824 )))
1825
1826 (((
1827 * (((
1828 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1829 )))
1830 )))
1831
1832 (((
1833 * (((
1834 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1835 )))
1836 )))
1837
1838 (((
1839 * (((
1840 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1841 )))
1842 )))
1843
1844 (((
1845 * (((
1846 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1847 )))
1848 )))
1849
1850 (((
1851 * (((
1852 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1853 )))
1854 )))
1855
1856 (((
1857 * (((
1858 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1859 )))
1860
1861 = 8. Packing Info =
1862 )))
1863
1864 (((
1865 (((
1866 **Package Includes**:
1867 )))
1868 )))
1869
1870 (((
1871 (((
1872 * LT-22222-L I/O Controller x 1
1873 * Stick Antenna for LoRa RF part x 1
1874 * Bracket for controller x1
1875 * Program cable x 1
1876 )))
1877 )))
1878
1879 (((
1880 (((
1881 **Dimension and weight**:
1882 )))
1883 )))
1884
1885 (((
1886 (((
1887 * Device Size: 13.5 x 7 x 3 cm
1888 * Device Weight: 105g
1889 * Package Size / pcs : 14.5 x 8 x 5 cm
1890 * Weight / pcs : 170g
1891 )))
1892 )))
1893
1894 (((
1895 = 9. Support =
1896 )))
1897
1898 * (((
1899 (((
1900 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.
1901 )))
1902 )))
1903 * (((
1904 (((
1905 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
1906 )))
1907 )))
1908
1909 (((
1910 (((
1911 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1912 )))
1913
1914 (((
1915 = 10. Reference​​​​​ =
1916
1917 * Product Page:
1918
1919 LT-22222-L: [[http:~~/~~/www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html]]
1920
1921 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1922 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1923 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1924 )))
1925 )))