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Version 101.3 by Xiaoling on 2022/10/25 15:22
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4
5
6 **Table of Contents:**
7
8 {{toc/}}
9
10
11
12
13
14
15
16 = 1.Introduction =
17
18
19 == 1.1 What is LT Series I/O Controller ==
20
21 (((
22
23
24 (((
25 The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
26 )))
27 )))
28
29 (((
30 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.
31 )))
32
33 (((
34 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
35 )))
36
37 (((
38 The use environment includes:
39 )))
40
41 (((
42 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.
43 )))
44
45 (((
46 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
47
48
49 )))
50
51 (((
52 [[image:1653295757274-912.png]]
53
54
55 )))
56
57
58 == 1.2  Specifications ==
59
60 (((
61
62
63 (% style="color:#037691" %)**Hardware System:**
64 )))
65
66 * (((
67 STM32L072CZT6 MCU
68 )))
69 * (((
70 SX1276/78 Wireless Chip 
71 )))
72 * (((
73 (((
74 Power Consumption:
75 )))
76
77 * (((
78 Idle: 4mA@12v
79 )))
80 * (((
81 20dB Transmit: 34mA@12v
82 )))
83 )))
84
85 (((
86
87
88 (% style="color:#037691" %)**Interface for Model: LT22222-L:**
89 )))
90
91 * (((
92 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
93 )))
94 * (((
95 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
96 )))
97 * (((
98 2 x Relay Output (5A@250VAC / 30VDC)
99 )))
100 * (((
101 2 x 0~~20mA Analog Input (res:0.01mA)
102 )))
103 * (((
104 2 x 0~~30V Analog Input (res:0.01v)
105 )))
106 * (((
107 Power Input 7~~ 24V DC. 
108 )))
109
110 (((
111
112
113 (% style="color:#037691" %)**LoRa Spec:**
114 )))
115
116 * (((
117 (((
118 Frequency Range:
119 )))
120
121 * (((
122 Band 1 (HF): 862 ~~ 1020 Mhz
123 )))
124 * (((
125 Band 2 (LF): 410 ~~ 528 Mhz
126 )))
127 )))
128 * (((
129 168 dB maximum link budget.
130 )))
131 * (((
132 +20 dBm - 100 mW constant RF output vs.
133 )))
134 * (((
135 +14 dBm high efficiency PA.
136 )))
137 * (((
138 Programmable bit rate up to 300 kbps.
139 )))
140 * (((
141 High sensitivity: down to -148 dBm.
142 )))
143 * (((
144 Bullet-proof front end: IIP3 = -12.5 dBm.
145 )))
146 * (((
147 Excellent blocking immunity.
148 )))
149 * (((
150 Low RX current of 10.3 mA, 200 nA register retention.
151 )))
152 * (((
153 Fully integrated synthesizer with a resolution of 61 Hz.
154 )))
155 * (((
156 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
157 )))
158 * (((
159 Built-in bit synchronizer for clock recovery.
160 )))
161 * (((
162 Preamble detection.
163 )))
164 * (((
165 127 dB Dynamic Range RSSI.
166 )))
167 * (((
168 Automatic RF Sense and CAD with ultra-fast AFC.
169 )))
170 * (((
171 Packet engine up to 256 bytes with CRC.
172
173
174
175
176 )))
177
178 == 1.3 Features ==
179
180
181 * LoRaWAN Class A & Class C protocol
182 * Optional Customized LoRa Protocol
183 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
184 * AT Commands to change parameters
185 * Remote configure parameters via LoRa Downlink
186 * Firmware upgradable via program port
187 * Counting
188
189 == 1.4  Applications ==
190
191
192 * Smart Buildings & Home Automation
193 * Logistics and Supply Chain Management
194 * Smart Metering
195 * Smart Agriculture
196 * Smart Cities
197 * Smart Factory
198
199 == 1.5 Hardware Variants ==
200
201
202 (% border="1" style="background-color:#f7faff; width:500px" %)
203 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
204 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
205 * 2 x Digital Input (Bi-direction)
206 * 2 x Digital Output
207 * 2 x Relay Output (5A@250VAC / 30VDC)
208 * 2 x 0~~20mA Analog Input (res:0.01mA)
209 * 2 x 0~~30V Analog Input (res:0.01v)
210 * 1 x Counting Port
211 )))
212
213 = 2. Power ON Device =
214
215
216 (((
217 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.
218 )))
219
220 (((
221 PWR will on when device is properly powered.
222
223
224 )))
225
226 [[image:1653297104069-180.png]]
227
228
229
230 = 3. Operation Mode =
231
232
233 == 3.1 How it works? ==
234
235
236 (((
237 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 (% style="color:green" %)**TX LED**(%%) will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. (% style="color:green" %)**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. 
238 )))
239
240 (((
241 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>>||anchor="H4.UseATCommand"]] to set the keys in the devices.
242 )))
243
244
245
246 == 3.2 Example to join LoRaWAN network ==
247
248
249 (((
250 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. 
251
252
253 )))
254
255 [[image:image-20220523172350-1.png||height="266" width="864"]]
256
257
258 (((
259 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:
260
261
262 )))
263
264 (((
265 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
266 )))
267
268 (((
269 Each LT is shipped with a sticker with the default device EUI as below:
270 )))
271
272 [[image:1653297924498-393.png]]
273
274
275 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
276
277 **Add APP EUI in the application.**
278
279 [[image:1653297955910-247.png||height="321" width="716"]]
280
281
282 **Add APP KEY and DEV EUI**
283
284 [[image:1653298023685-319.png]]
285
286
287
288 (((
289 (% style="color:blue" %)**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.
290
291
292 )))
293
294 [[image:1653298044601-602.png||height="405" width="709"]]
295
296
297
298 == 3.3 Uplink Payload ==
299
300
301 There are five working modes + one interrupt mode on LT for different type application:
302
303 * (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
304 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
305 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
306 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
307 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
308 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
309
310 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
311
312
313 (((
314 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
315 )))
316
317 [[image:image-20220523174024-3.png]]
318
319 (((
320
321
322 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
323 )))
324
325 [[image:image-20220523174254-4.png]]
326
327 * RO is for relay. ROx=1 : close，ROx=0 always open.
328 * DI is for digital input. DIx=1: high or float, DIx=0: low.
329 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
330
331 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
332
333 For example if payload is: [[image:image-20220523175847-2.png]]
334
335
336 **The value for the interface is:  **
337
338 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
339
340 AVI2 channel voltage is 0x04AC/1000=1.196V
341
342 ACI1 channel current is 0x1310/1000=4.880mA
343
344 ACI2 channel current is 0x1300/1000=4.864mA
345
346 The last byte 0xAA= 10101010(B) means
347
348 * [1] RO1 relay channel is close and the RO1 LED is ON.
349 * [0] RO2 relay channel is open and RO2 LED is OFF;
350
351 **LT22222-L:**
352
353 * [1] DI2 channel is high input and DI2 LED is ON;
354 * [0] DI1 channel is low input;
355
356 * [0] DO3 channel output state
357 ** DO3 is float in case no load between DO3 and V+.;
358 ** DO3 is high in case there is load between DO3 and V+.
359 ** DO3 LED is off in both case
360 * [1] DO2 channel output is low and DO2 LED is ON.
361 * [0] DO1 channel output state
362 ** DO1 is float in case no load between DO1 and V+.;
363 ** DO1 is high in case there is load between DO1 and V+.
364 ** DO1 LED is off in both case
365
366 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
367
368
369 (((
370 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
371 )))
372
373 (((
374 Total : 11 bytes payload
375 )))
376
377 [[image:image-20220523180452-3.png]]
378
379
380 (((
381 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
382 )))
383
384 [[image:image-20220523180506-4.png]]
385
386 * RO is for relay. ROx=1 : close，ROx=0 always open.
387 * FIRST: Indicate this is the first packet after join network.
388 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
389
390 (((
391 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
392 )))
393
394 (((
395
396
397 **To use counting mode, please run:**
398 )))
399
400 (% class="box infomessage" %)
401 (((
402 (((
403 (((
404 **AT+MOD=2**
405 )))
406
407 (((
408 **ATZ**
409 )))
410 )))
411 )))
412
413 (((
414
415
416 (% style="color:#4f81bd" %)**AT Commands for counting:**
417
418
419 )))
420
421 (((
422 **For LT22222-L:**
423
424
425 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
426
427 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
428
429 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
430
431 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
432
433 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
434
435 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
436 )))
437
438
439
440 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
441
442
443 **LT22222-L**: This mode the DI1 is used as a counting pin.
444
445 [[image:image-20220523181246-5.png]]
446
447 (((
448
449
450 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
451 )))
452
453 [[image:image-20220523181301-6.png]]
454
455 * RO is for relay. ROx=1 : close，ROx=0 always open.
456 * FIRST: Indicate this is the first packet after join network.
457 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
458
459 (((
460 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
461 )))
462
463
464 (((
465 **To use counting mode, please run:**
466 )))
467
468 (% class="box infomessage" %)
469 (((
470 (((
471 (((
472 **AT+MOD=3**
473 )))
474
475 (((
476 **ATZ**
477 )))
478 )))
479 )))
480
481 (((
482 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
483 )))
484
485
486
487 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
488
489
490 (((
491 **LT22222-L**: This mode the DI1 is used as a counting pin.
492 )))
493
494 (((
495 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.
496 )))
497
498 [[image:image-20220523181903-8.png]]
499
500
501 (((
502 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
503 )))
504
505 [[image:image-20220523181727-7.png]]
506
507 * RO is for relay. ROx=1 : close，ROx=0 always open.
508 * FIRST: Indicate this is the first packet after join network.
509 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
510
511 (((
512 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
513 )))
514
515 (((
516
517
518 **To use this mode, please run:**
519 )))
520
521 (% class="box infomessage" %)
522 (((
523 (((
524 (((
525 **AT+MOD=4**
526 )))
527
528 (((
529 **ATZ**
530 )))
531 )))
532 )))
533
534
535 (((
536 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
537 )))
538
539 (((
540
541
542 **Plus below command for AVI1 Counting:**
543
544
545 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
546
547 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
548
549 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
550
551 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
552 )))
553
554
555
556 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
557
558
559 **LT22222-L**: This mode the DI1 is used as a counting pin.
560
561 [[image:image-20220523182334-9.png]]
562
563 (((
564
565
566 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
567 )))
568
569 * RO is for relay. ROx=1 : close，ROx=0 always open.
570 * FIRST: Indicate this is the first packet after join network.
571 * (((
572 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
573 )))
574
575 (((
576 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
577 )))
578
579 (((
580
581
582 **To use this mode, please run:**
583 )))
584
585 (% class="box infomessage" %)
586 (((
587 (((
588 (((
589 **AT+MOD=5**
590 )))
591
592 (((
593 **ATZ**
594 )))
595 )))
596 )))
597
598 (((
599 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
600 )))
601
602
603
604 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
605
606
607 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
608
609 For example, if user has configured below commands:
610
611 * **AT+MOD=1 ** **~-~->**  The normal working mode
612 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
613
614 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
615
616 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
617 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.**
618
619 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
620
621
622 (% style="color:#4f81bd" %)**Trigger base on voltage**:
623
624 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
625
626
627 **Example:**
628
629 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)
630
631 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
632
633
634
635 (% style="color:#4f81bd" %)**Trigger base on current**:
636
637 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
638
639
640 **Example:**
641
642 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
643
644
645
646 (% style="color:#4f81bd" %)**Trigger base on DI status**:
647
648 DI status trigger Flag.
649
650 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
651
652
653 **Example:**
654
655 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
656
657
658
659 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
660
661 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
662
663 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
664
665 AA: Code for this downlink Command:
666
667 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
668
669 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
670
671 yy2 yy2: AC1 or AV1 high limit.
672
673 yy3 yy3: AC2 or AV2 low limit.
674
675 Yy4 yy4: AC2 or AV2 high limit.
676
677
678 **Example1**: AA 00 13 88 00 00 00 00 00 00
679
680 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
681
682
683 **Example2**: AA 02 01 00
684
685 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
686
687
688
689 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
690
691 MOD6 Payload : total 11 bytes payload
692
693 [[image:image-20220524085923-1.png]]
694
695
696 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
697
698 [[image:image-20220524090106-2.png]]
699
700 * Each bits shows if the corresponding trigger has been configured.
701
702 **Example:**
703
704 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
705
706
707
708 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
709
710 [[image:image-20220524090249-3.png]]
711
712 * Each bits shows which status has been trigger on this uplink.
713
714 **Example:**
715
716 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
717
718
719
720 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
721
722 [[image:image-20220524090456-4.png]]
723
724 * Each bits shows which status has been trigger on this uplink.
725
726 **Example:**
727
728 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
729
730 00000101: Means both DI1 and DI2 trigger are enabled.
731
732
733
734 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
735
736 Downlink command to poll MOD6 status:
737
738 **AB 06**
739
740 When device got this command, it will send the MOD6 payload.
741
742
743
744
745 === 3.3.7 Payload Decoder ===
746
747 (((
748
749
750 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
751 )))
752
753
754
755 == 3.4 ​Configure LT via AT or Downlink ==
756
757
758 (((
759 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
760 )))
761
762 (((
763 (((
764 There are two kinds of Commands:
765 )))
766 )))
767
768 * (% 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: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
769
770 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
771
772 === 3.4.1 Common Commands ===
773
774
775 (((
776 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>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
777 )))
778
779
780
781 === 3.4.2 Sensor related commands ===
782
783
784 ==== 3.4.2.1 Set Transmit Interval ====
785
786
787 Set device uplink interval.
788
789 * (% style="color:#037691" %)**AT Command:**
790
791 **AT+TDC=N **
792
793
794 **Example: **AT+TDC=30000. Means set interval to 30 seconds
795
796
797 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
798
799 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
800
801
802
803
804 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
805
806
807 Set work mode.
808
809 * (% style="color:#037691" %)**AT Command:**
810
811 **AT+MOD=N  **
812
813
814 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
815
816
817 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
818
819 **0x0A aa    ** ~/~/ Same as AT+MOD=aa
820
821
822
823
824 ==== 3.4.2.3 Poll an uplink ====
825
826
827 * (% style="color:#037691" %)**AT Command:**
828
829 There is no AT Command to poll uplink
830
831
832 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
833
834 **0x08 FF     **~/~/ Poll an uplink
835
836
837 **Example**: 0x08FF, ask device to send an Uplink
838
839
840
841
842 ==== 3.4.2.4 Enable Trigger Mode ====
843
844
845 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
846
847 * (% style="color:#037691" %)**AT Command:**
848
849 **AT+ADDMOD6=1 or 0**
850
851 1: Enable Trigger Mode
852
853 0: Disable Trigger Mode
854
855
856 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
857
858 **0x0A 06 aa    ** ~/~/ Same as AT+ADDMOD6=aa
859
860
861
862
863 ==== 3.4.2.5 Poll trigger settings ====
864
865
866 Poll trigger settings,
867
868 * (% style="color:#037691" %)**AT Command:**
869
870 There is no AT Command for this feature.
871
872
873 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
874
875 **0xAB 06         **~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
876
877
878
879
880 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
881
882
883 Enable Disable DI1/DI2/DI2 as trigger,
884
885 * (% style="color:#037691" %)**AT Command:**
886
887 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
888
889
890 **Example:**
891
892 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
893
894 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
895
896 **0xAA 02 aa bb        **~/~/ Same as AT+DTRI=aa,bb
897
898
899
900
901 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
902
903
904 Set DI1 or DI3(for LT-33222-L) trigger.
905
906 * (% style="color:#037691" %)**AT Command:**
907
908 **AT+TRIG1=a,b**
909
910 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
911
912 b : delay timing.
913
914
915 **Example:**
916
917 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
918
919
920 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
921 * **0x09 01 aa bb cc    ** ~/~/ same as AT+TRIG1=aa,0x(bb cc)
922
923 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
924
925
926 Set DI2 trigger.
927
928 * (% style="color:#037691" %)**AT Command:**
929
930 **AT+TRIG2=a,b**
931
932
933 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
934
935 b : delay timing.
936
937
938 **Example:**
939
940 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
941
942
943 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
944
945 **0x09 02 aa bb cc           **~/~/ same as AT+TRIG1=aa,0x(bb cc)
946
947
948
949
950 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
951
952
953 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
954
955 * (% style="color:#037691" %)**AT Command**
956
957 **AT+ACLIM**
958
959
960 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
961
962 **0x AA 01 aa bb cc dd ee ff gg hh        ** ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
963
964
965
966
967 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
968
969
970 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
971
972 * (% style="color:#037691" %)**AT Command**
973
974 **AT+AVLIM  See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
975
976
977 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
978
979 **0x AA 00 aa bb cc dd ee ff gg hh    ** ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
980
981
982
983
984 ==== 3.4.2.11 Trigger – Set minimum interval ====
985
986
987 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
988
989 * (% style="color:#037691" %)**AT Command**
990
991 **AT+ATDC=5        ** Device won't response the second trigger within 5 minute after the first trigger.
992
993
994 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
995
996 **0x AC aa bb   ** ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
997
998 (((
999
1000
1001 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
1002 )))
1003
1004
1005
1006
1007 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1008
1009
1010 * (% style="color:#037691" %)**AT Command**
1011
1012 There is no AT Command to control Digital Output
1013
1014
1015 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1016 * **0x02 aa bb cc     **~/~/ Set DO1/DO2/DO3 output
1017
1018 (((
1019 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1020 )))
1021
1022 (((
1023 01: Low,  00: High ,  11: No action
1024 )))
1025
1026 [[image:image-20220524092754-5.png]]
1027
1028 (((
1029 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1030 )))
1031
1032 (((
1033 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1034 )))
1035
1036
1037
1038
1039 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1040
1041
1042 * (% style="color:#037691" %)**AT Command**
1043
1044 There is no AT Command to control Digital Output
1045
1046
1047 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1048
1049 **0xA9 aa bb cc     **~/~/ Set DO1/DO2/DO3 output with time control
1050
1051
1052 This is to control the digital output time of DO pin. Include four bytes:
1053
1054 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1055
1056 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1057
1058 01: DO pins will change back to original state after timeout.
1059
1060 00: DO pins will change to an inverter state after timeout 
1061
1062
1063 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1064
1065 [[image:image-20220524093238-6.png]]
1066
1067
1068 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1069
1070 [[image:image-20220524093328-7.png]]
1071
1072
1073 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1074
1075 [[image:image-20220524093351-8.png]]
1076
1077
1078 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:
1079
1080 Latching time. Unit: ms
1081
1082 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1083
1084
1085 **Example payload:**
1086
1087 **~1. A9 01 01 01 01 07 D0**
1088
1089 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1090
1091 **2. A9 01 00 01 11 07 D0**
1092
1093 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1094
1095 **3. A9 00 00 00 00 07 D0**
1096
1097 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1098
1099 **4. A9 00 11 01 00 07 D0**
1100
1101 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
1102
1103
1104
1105
1106 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1107
1108
1109 * (% style="color:#037691" %)**AT Command:**
1110
1111 There is no AT Command to control Relay Output
1112
1113
1114 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1115
1116 **0x03 aa bb     **~/~/ Set RO1/RO2 output
1117
1118
1119 (((
1120 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1121 )))
1122
1123 (((
1124 01: Close ,  00: Open , 11: No action
1125 )))
1126
1127 (((
1128 [[image:image-20220524093724-9.png]]
1129 )))
1130
1131 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1132
1133
1134
1135
1136 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1137
1138
1139 * (% style="color:#037691" %)**AT Command:**
1140
1141 There is no AT Command to control Relay Output
1142
1143
1144 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1145
1146 **0x05 aa bb cc dd     **~/~/ Set RO1/RO2 relay with time control
1147
1148
1149 This is to control the relay output time of relay. Include four bytes:
1150
1151 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1152
1153 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1154
1155 01: Relays will change back to original state after timeout.
1156
1157 00: Relays will change to an inverter state after timeout
1158
1159
1160 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1161
1162 [[image:image-20221008095908-1.png||height="364" width="564"]]
1163
1164
1165 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1166
1167 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1168
1169
1170 **Example payload:**
1171
1172 **~1. 05 01 11 07 D**
1173
1174 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1175
1176 **2. 05 01 10 07 D0**
1177
1178 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1179
1180 **3. 05 00 01 07 D0**
1181
1182 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1183
1184 **4. 05 00 00 07 D0**
1185
1186 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1187
1188
1189
1190 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1191
1192
1193 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1194
1195 * (% style="color:#037691" %)**AT Command:**
1196
1197 **AT+VOLMAX   ** ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1198
1199
1200 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1201
1202 **0xA5 aa bb cc   **~/~/ Same as AT+VOLMAX=(aa bb),cc
1203
1204
1205
1206
1207 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1208
1209
1210 * (% style="color:#037691" %)**AT Command:**
1211
1212 **AT+SETCNT=aa,(bb cc dd ee) **
1213
1214 aa: 1: Set count1,
1215
1216 2: Set count2,
1217
1218 3: Set AV1 count
1219
1220 Bb cc dd ee: number to be set
1221
1222
1223 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1224
1225 **0x A8 aa bb cc dd ee     **~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1226
1227
1228
1229
1230 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1231
1232
1233 Clear counting for counting mode
1234
1235 * (% style="color:#037691" %)**AT Command:**
1236
1237 **AT+CLRCOUNT ** ~/~/ clear all counting
1238
1239
1240 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1241
1242 **0x A6 01    ** ~/~/ clear all counting
1243
1244
1245
1246
1247 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1248
1249
1250 * (% style="color:#037691" %)**AT Command:**
1251
1252 **AT+COUTIME=60  **~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1253
1254
1255 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1256
1257 **0x A7 aa bb cc     **~/~/ same as AT+COUTIME =aa bb cc,
1258
1259 (((
1260 range: aa bb cc:0 to 16777215,  (unit:second)
1261
1262
1263
1264
1265 )))
1266
1267 ==== 3.4.2.20 Reset save DR DO state ====
1268
1269
1270 * (% style="color:#037691" %)**AT Command:**
1271
1272 **AT+RODORET=1  **~/~/ RODO will close when the device joining the network. (default)
1273
1274 **AT+RODORET=0  **~/~/After the device is reset, the previously saved RODO state (only MOD2 to MOD5) is read, and its state is not changed when it is reconnected to the network.
1275
1276
1277 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1278
1279 **0x AD aa      **~/~/ same as AT+RODORET =aa
1280
1281 (((
1282
1283
1284
1285
1286 ==== 3.4.2.21 Encrypted payload ====
1287
1288
1289 * (% style="color:#037691" %)**AT Command:**
1290
1291 **AT+DECRYPT=1  **~/~/ The payload is uploaded without encryption
1292
1293 **AT+DECRYPT=0  **~/~/Encrypt when uploading payload (default)
1294
1295
1296
1297
1298 ==== 3.4.2.22 Get sensor value ====
1299
1300
1301 * (% style="color:#037691" %)**AT Command:**
1302
1303 **AT+GETSENSORVALUE=0  **~/~/ The serial port gets the reading of the current sensor
1304
1305 **AT+GETSENSORVALUE=1  **~/~/The serial port gets the current sensor reading and uploads it.
1306
1307
1308
1309
1310 ==== 3.4.2.23 Resets the downlink packet count ====
1311
1312
1313 * (% style="color:#037691" %)**AT Command:**
1314
1315 **AT+DISFCNTCHECK=0  **~/~/ When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node will no longer receive downlink packets (default)
1316
1317 **AT+DISFCNTCHECK=1  **~/~/When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node resets the downlink packet count and keeps it consistent with the server downlink packet count.
1318
1319
1320
1321
1322 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1323
1324
1325 * (% style="color:#037691" %)**AT Command:**
1326
1327 **AT+DISMACANS=0**  ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of 11 bytes (DR0 of US915, DR2 of AS923, DR2 of AU195), the node will send a packet with a payload of 00 and a port of 4. (default)
1328
1329 **AT+DISMACANS=1**      ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of the DR, the node will ignore the MACANS and not reply, and only upload the payload part.
1330
1331
1332 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1333
1334 **0x21 00 01 ** ~/~/ Set  the DISMACANS=1
1335
1336
1337
1338
1339 ==== 3.4.2.25 Copy downlink to uplink ====
1340
1341
1342 * (% style="color:#037691" %)**AT Command**(%%)**:**
1343
1344 **AT+RPL=5**  ~/~/ After receiving the package from the server, it will immediately upload the content of the package to the server, the port number is 100.
1345
1346 Example：**aa xx xx xx xx**         ~/~/ aa indicates whether the configuration has changed, 00 is yes, 01 is no; xx xx xx xx are the bytes sent.
1347
1348
1349 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173747-6.png?width=1124&height=165&rev=1.1||alt="image-20220823173747-6.png"]]
1350
1351 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1352
1353
1354
1355 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173833-7.png?width=1124&height=149&rev=1.1||alt="image-20220823173833-7.png"]]
1356
1357 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1358
1359
1360
1361 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1362
1363
1364 * (((
1365 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1366
1367 **26 01  ** ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1368
1369
1370 )))
1371
1372 **Example：**
1373
1374 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173929-8.png?width=1205&height=76&rev=1.1||alt="image-20220823173929-8.png"]]
1375
1376
1377
1378 )))
1379
1380 == 3.5 Integrate with Mydevice ==
1381
1382
1383 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:
1384
1385 (((
1386 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1387 )))
1388
1389 (((
1390 (% style="color:blue" %)**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:
1391
1392
1393 )))
1394
1395 [[image:image-20220719105525-1.png||height="377" width="677"]]
1396
1397
1398
1399 [[image:image-20220719110247-2.png||height="388" width="683"]]
1400
1401
1402 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1403
1404 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1405
1406 Search under The things network
1407
1408 [[image:1653356838789-523.png||height="337" width="740"]]
1409
1410
1411
1412 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1413
1414 [[image:image-20220524094909-1.png||height="335" width="729"]]
1415
1416
1417 [[image:image-20220524094909-2.png||height="337" width="729"]]
1418
1419
1420 [[image:image-20220524094909-3.png||height="338" width="727"]]
1421
1422
1423 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1424
1425
1426 [[image:image-20220524094909-5.png||height="341" width="734"]]
1427
1428
1429
1430 == 3.6 Interface Detail ==
1431
1432
1433 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1434
1435
1436 Support NPN Type sensor
1437
1438 [[image:1653356991268-289.png]]
1439
1440
1441
1442 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1443
1444
1445 (((
1446 The DI port of LT-22222-L can support NPN or PNP output sensor.
1447 )))
1448
1449 (((
1450 (((
1451 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.
1452
1453
1454 )))
1455 )))
1456
1457 [[image:1653357170703-587.png]]
1458
1459 (((
1460 (((
1461 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1462 )))
1463 )))
1464
1465 (((
1466
1467 )))
1468
1469 (((
1470 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1471 )))
1472
1473 (((
1474 This type of sensor will output a low signal GND when active.
1475 )))
1476
1477 * (((
1478 Connect sensor's output to DI1-
1479 )))
1480 * (((
1481 Connect sensor's VCC to DI1+.
1482 )))
1483
1484 (((
1485 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1486 )))
1487
1488 (((
1489 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1490 )))
1491
1492 (((
1493 If** DI1+ **= **12v**, the [[image:1653968155772-850.png||height="23" width="19"]]= 12mA , So the LT-22222-L will be able to detect this active signal.
1494 )))
1495
1496 (((
1497
1498
1499
1500 )))
1501
1502 (((
1503 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1504 )))
1505
1506 (((
1507 This type of sensor will output a high signal (example 24v) when active.
1508 )))
1509
1510 * (((
1511 Connect sensor's output to DI1+
1512 )))
1513 * (((
1514 Connect sensor's GND DI1-.
1515 )))
1516
1517 (((
1518 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1519 )))
1520
1521 (((
1522 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1523 )))
1524
1525 (((
1526 If **DI1+ = 24v**, the[[image:1653968155772-850.png||height="23" width="19"]] 24mA , So the LT-22222-L will be able to detect this high active signal.
1527 )))
1528
1529 (((
1530
1531
1532
1533 )))
1534
1535 (((
1536 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1537 )))
1538
1539 (((
1540 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1541 )))
1542
1543 * (((
1544 Connect sensor's output to DI1+ with a serial 50K resistor
1545 )))
1546 * (((
1547 Connect sensor's GND DI1-.
1548 )))
1549
1550 (((
1551 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1552 )))
1553
1554 (((
1555 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1556 )))
1557
1558 (((
1559 If sensor output is 220v, the [[image:1653968155772-850.png||height="23" width="19"]](% 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.
1560 )))
1561
1562
1563
1564 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1565
1566
1567 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1568
1569 [[image:1653357531600-905.png]]
1570
1571
1572
1573 === 3.6.4 Analog Input Interface ===
1574
1575
1576 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:
1577
1578
1579 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1580
1581 [[image:1653357592296-182.png]]
1582
1583 Example to connect a 4~~20mA sensor
1584
1585 We take the wind speed sensor as an example for reference only.
1586
1587
1588 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1589
1590 **Red:  12~~24v**
1591
1592 **Yellow:  4~~20mA**
1593
1594 **Black:  GND**
1595
1596
1597 **Connection diagram:**
1598
1599 [[image:1653357640609-758.png]]
1600
1601 [[image:1653357648330-671.png||height="155" width="733"]]
1602
1603
1604
1605 === 3.6.5 Relay Output ===
1606
1607
1608 (((
1609 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:
1610 )))
1611
1612 [[image:image-20220524100215-9.png]]
1613
1614
1615 [[image:image-20220524100215-10.png||height="382" width="723"]]
1616
1617
1618
1619 == 3.7 LEDs Indicators ==
1620
1621
1622 [[image:image-20220524100748-11.png]]
1623
1624
1625
1626 = 4. Use AT Command =
1627
1628
1629 == 4.1 Access AT Command ==
1630
1631
1632 (((
1633 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.
1634 )))
1635
1636 (((
1637
1638 )))
1639
1640 [[image:1653358238933-385.png]]
1641
1642
1643 (((
1644 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:
1645 )))
1646
1647 [[image:1653358355238-883.png]]
1648
1649
1650 (((
1651 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/]]
1652 )))
1653
1654 (((
1655 AT+<CMD>?        : Help on <CMD>
1656 )))
1657
1658 (((
1659 AT+<CMD>         : Run <CMD>
1660 )))
1661
1662 (((
1663 AT+<CMD>=<value> : Set the value
1664 )))
1665
1666 (((
1667 AT+<CMD>=?       :  Get the value
1668 )))
1669
1670 (((
1671 ATZ: Trig a reset of the MCU
1672 )))
1673
1674 (((
1675 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1676 )))
1677
1678 (((
1679 AT+DEUI: Get or Set the Device EUI
1680 )))
1681
1682 (((
1683 AT+DADDR: Get or Set the Device Address
1684 )))
1685
1686 (((
1687 AT+APPKEY: Get or Set the Application Key
1688 )))
1689
1690 (((
1691 AT+NWKSKEY: Get or Set the Network Session Key
1692 )))
1693
1694 (((
1695 AT+APPSKEY:  Get or Set the Application Session Key
1696 )))
1697
1698 (((
1699 AT+APPEUI:  Get or Set the Application EUI
1700 )))
1701
1702 (((
1703 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1704 )))
1705
1706 (((
1707 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1708 )))
1709
1710 (((
1711 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1712 )))
1713
1714 (((
1715 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1716 )))
1717
1718 (((
1719 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1720 )))
1721
1722 (((
1723 AT+RX2FQ: Get or Set the Rx2 window frequency
1724 )))
1725
1726 (((
1727 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1728 )))
1729
1730 (((
1731 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1732 )))
1733
1734 (((
1735 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1736 )))
1737
1738 (((
1739 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1740 )))
1741
1742 (((
1743 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1744 )))
1745
1746 (((
1747 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1748 )))
1749
1750 (((
1751 AT+NWKID: Get or Set the Network ID
1752 )))
1753
1754 (((
1755 AT+FCU: Get or Set the Frame Counter Uplink
1756 )))
1757
1758 (((
1759 AT+FCD: Get or Set the Frame Counter Downlink
1760 )))
1761
1762 (((
1763 AT+CLASS: Get or Set the Device Class
1764 )))
1765
1766 (((
1767 AT+JOIN: Join network
1768 )))
1769
1770 (((
1771 AT+NJS: Get OTAA Join Status
1772 )))
1773
1774 (((
1775 AT+SENDB: Send hexadecimal data along with the application port
1776 )))
1777
1778 (((
1779 AT+SEND: Send text data along with the application port
1780 )))
1781
1782 (((
1783 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1784 )))
1785
1786 (((
1787 AT+RECV: Print last received data in raw format
1788 )))
1789
1790 (((
1791 AT+VER:  Get current image version and Frequency Band
1792 )))
1793
1794 (((
1795 AT+CFM: Get or Set the confirmation mode (0-1)
1796 )))
1797
1798 (((
1799 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1800 )))
1801
1802 (((
1803 AT+SNR: Get the SNR of the last received packet
1804 )))
1805
1806 (((
1807 AT+RSSI: Get the RSSI of the last received packet
1808 )))
1809
1810 (((
1811 AT+TDC: Get or set the application data transmission interval in ms
1812 )))
1813
1814 (((
1815 AT+PORT: Get or set the application port
1816 )))
1817
1818 (((
1819 AT+DISAT: Disable AT commands
1820 )))
1821
1822 (((
1823 AT+PWORD: Set password, max 9 digits
1824 )))
1825
1826 (((
1827 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1828 )))
1829
1830 (((
1831 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1832 )))
1833
1834 (((
1835 AT+CFG: Print all settings
1836 )))
1837
1838
1839
1840 == 4.2 Common AT Command Sequence ==
1841
1842
1843 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1844
1845 (((
1846
1847
1848 (((
1849 (% style="color:blue" %)**If device has not joined network yet:**
1850 )))
1851 )))
1852
1853 (((
1854 (% style="background-color:#dcdcdc" %)**123456**
1855 )))
1856
1857 (((
1858 (% style="background-color:#dcdcdc" %)**AT+FDR**
1859 )))
1860
1861 (((
1862 (% style="background-color:#dcdcdc" %)**123456**
1863 )))
1864
1865 (((
1866 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1867 )))
1868
1869 (((
1870 (% style="background-color:#dcdcdc" %)**ATZ**
1871 )))
1872
1873
1874 (((
1875 (% style="color:blue" %)**If device already joined network:**
1876 )))
1877
1878 (((
1879 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1880 )))
1881
1882 (((
1883 (% style="background-color:#dcdcdc" %)**ATZ**
1884 )))
1885
1886
1887
1888 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1889
1890 (((
1891
1892
1893 (((
1894 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
1895 )))
1896 )))
1897
1898 (((
1899 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
1900 )))
1901
1902 (((
1903 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
1904 )))
1905
1906 (((
1907 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
1908 )))
1909
1910 (((
1911 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
1912 )))
1913
1914 (((
1915 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
1916 )))
1917
1918 (((
1919 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
1920 )))
1921
1922 (((
1923 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
1924 )))
1925
1926 (((
1927 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
1928 )))
1929
1930 (((
1931 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
1932 )))
1933
1934 (((
1935 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
1936 )))
1937
1938 (((
1939 (% 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.
1940 )))
1941
1942 (((
1943 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
1944
1945
1946 )))
1947
1948 (((
1949 (% style="color:red" %)**Note:**
1950 )))
1951
1952 (((
1953 **~1. Make sure the device is set to ABP mode in the IoT Server.**
1954
1955 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
1956
1957 **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?
1958 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
1959
1960 **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**
1961
1962
1963 )))
1964
1965 (((
1966 [[image:1653359097980-169.png||height="188" width="729"]]
1967 )))
1968
1969 (((
1970
1971 )))
1972
1973
1974 === 4.2.3 Change to Class A ===
1975
1976
1977 (((
1978 (% style="color:blue" %)If sensor JOINED:
1979
1980 (% style="background-color:#dcdcdc" %)**AT+CLASS=A
1981 ATZ**
1982 )))
1983
1984
1985
1986 = 5. FAQ =
1987
1988
1989 == 5.1 How to upgrade the image? ==
1990
1991
1992 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1993
1994 * Support new features
1995 * For bug fix
1996 * Change LoRaWAN bands.
1997
1998 Below shows the hardware connection for how to upload an image to the LT:
1999
2000 [[image:1653359603330-121.png]]
2001
2002
2003 (((
2004 (% style="color:blue" %)**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]].
2005 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:https://www.dropbox.com/sh/g99v0fxcltn9r1y/AADKXQ2v5ZT-S3sxdmbvE7UAa/LT-22222-L/image?dl=0&subfolder_nav_tracking=1]].
2006 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2007
2008
2009 (((
2010 (% style="color:blue" %)**For LT-22222-L**(%%):
2011 Hold down the PRO button and then momentarily press the RST reset button and the (% style="color:red" %)**DO1 led**(%%) will change from OFF to ON. When (% style="color:red" %)**DO1 LED**(%%) is on, it means the device is in download mode.
2012 )))
2013
2014
2015 )))
2016
2017 [[image:image-20220524103407-12.png]]
2018
2019 [[image:image-20220524103429-13.png]]
2020
2021 [[image:image-20220524104033-15.png]]
2022
2023
2024 (% 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:
2025
2026
2027 [[image:1653360054704-518.png||height="186" width="745"]]
2028
2029
2030 (((
2031 (((
2032
2033
2034 == 5.2 How to change the LoRa Frequency Bands/Region? ==
2035
2036
2037 )))
2038 )))
2039
2040 (((
2041 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2042 )))
2043
2044 (((
2045
2046
2047
2048 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2049
2050
2051 )))
2052
2053 (((
2054 (((
2055 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2056 )))
2057 )))
2058
2059 (((
2060 (((
2061 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2062
2063
2064
2065 )))
2066 )))
2067
2068 (((
2069 (% style="color:blue" %)**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.
2070
2071
2072 )))
2073
2074 (((
2075 [[image:1653360231087-571.png||height="401" width="727"]]
2076
2077
2078 )))
2079
2080 (((
2081 (% 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.**
2082 )))
2083
2084
2085
2086 (((
2087 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2088
2089
2090 )))
2091
2092 (((
2093 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2094 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2095 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2096 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2097 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2098 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2099 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2100 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2101 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2102 )))
2103
2104
2105 (((
2106 As shown in below:
2107 )))
2108
2109 [[image:1653360498588-932.png||height="485" width="726"]]
2110
2111
2112
2113 == 5.4 Can I see counting event in Serial? ==
2114
2115
2116 (((
2117 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.
2118
2119
2120
2121 == 5.5 Can i use point to point communication for LT-22222-L? ==
2122
2123
2124 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2125
2126
2127
2128 )))
2129
2130 (((
2131 == 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2132
2133
2134 If the device is not shut down, but directly powered off.
2135
2136 It will default that this is a power-off state.
2137
2138 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2139
2140 After restart, the status before power failure will be read from flash.
2141
2142
2143
2144 == 5.7 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2145
2146
2147 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2148
2149
2150 [[image:image-20221006170630-1.png||height="610" width="945"]]
2151
2152
2153
2154 = 6. Trouble Shooting =
2155
2156
2157 )))
2158
2159 (((
2160 (((
2161 == 6.1 Downlink doesn't work, how to solve it? ==
2162
2163
2164 )))
2165 )))
2166
2167 (((
2168 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2169 )))
2170
2171 (((
2172
2173
2174
2175 == 6.2 Have trouble to upload image. ==
2176
2177
2178 )))
2179
2180 (((
2181 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2182 )))
2183
2184 (((
2185
2186
2187
2188 == 6.3 Why I can't join TTN in US915 /AU915 bands? ==
2189
2190
2191 )))
2192
2193 (((
2194 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2195 )))
2196
2197
2198
2199 = 7. Order Info =
2200
2201
2202 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2203
2204 (% style="color:#4f81bd" %)**XXX:**
2205
2206 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2207 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2208 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2209 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2210 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2211 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2212 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2213 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2214 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2215
2216
2217
2218 = 8. Packing Info =
2219
2220
2221 **Package Includes**:
2222
2223 * LT-22222-L I/O Controller x 1
2224 * Stick Antenna for LoRa RF part x 1
2225 * Bracket for controller x1
2226 * Program cable x 1
2227
2228 **Dimension and weight**:
2229
2230 * Device Size: 13.5 x 7 x 3 cm
2231 * Device Weight: 105g
2232 * Package Size / pcs : 14.5 x 8 x 5 cm
2233 * Weight / pcs : 170g
2234
2235
2236
2237 = 9. Support =
2238
2239
2240 * (((
2241 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.
2242 )))
2243 * (((
2244 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 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2245
2246
2247
2248
2249 )))
2250
2251 = 10. Reference​​​​​ =
2252
2253
2254 * 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]]
2255 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2256 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]