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Version 66.24 by Xiaoling on 2022/05/24 13:58
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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 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
975 )))
976
977 This is to control the digital output time of DO pin. Include four bytes:
978
979 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
980
981 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
982
983 01: DO pins will change back to original state after timeout.
984
985 00: DO pins will change to an inverter state after timeout 
986
987 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
988
989 [[image:image-20220524093238-6.png]]
990
991 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
992
993 [[image:image-20220524093328-7.png]]
994
995 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
996
997 [[image:image-20220524093351-8.png]]
998
999 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1000
1001 Latching time. Unit: ms
1002
1003 Device will upload a packet if downlink code executes successfully.
1004
1005 **Example payload:**
1006
1007 **~1. A9 01 01 01 01 07 D0**
1008
1009 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1010
1011 **2. A9 01 00 01 11 07 D0**
1012
1013 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1014
1015 **3. A9 00 00 00 00 07 D0**
1016
1017 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1018
1019 **4. A9 00 11 01 00 07 D0**
1020
1021 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
1022
1023
1024 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1025
1026 * AT Command:
1027
1028 There is no AT Command to control Relay Output
1029
1030 * Downlink Payload (prefix 0x03):
1031
1032 (% class="box infomessage" %)
1033 (((
1034 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1035 )))
1036
1037 (((
1038 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1039 )))
1040
1041 (((
1042 01: Close ,  00: Open , 11: No action
1043 )))
1044
1045 (((
1046 [[image:image-20220524093724-9.png]]
1047 )))
1048
1049 Device will upload a packet if downlink code executes successfully.
1050
1051
1052 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1053
1054 * AT Command:
1055
1056 There is no AT Command to control Relay Output
1057
1058 * Downlink Payload (prefix 0x05):
1059
1060 (% class="box infomessage" %)
1061 (((
1062 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1063 )))
1064
1065 This is to control the relay output time of relay. Include four bytes:
1066
1067 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1068
1069 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1070
1071 01: Relays will change back to original state after timeout.
1072
1073 00: Relays will change to an inverter state after timeout
1074
1075 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1076
1077 [[image:image-20220524093831-10.png]]
1078
1079 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1080
1081 Device will upload a packet if downlink code executes successfully.
1082
1083 **Example payload:**
1084
1085 **~1. 05 01 11 07 D0**
1086
1087 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1088
1089 **2. 05 01 10 07 D0**
1090
1091 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1092
1093 **3. 05 00 01 07 D0**
1094
1095 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1096
1097 **4. 05 00 00 07 D0**
1098
1099 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1100
1101
1102 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1103
1104 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]]
1105
1106 * AT Command:
1107
1108 (% class="box infomessage" %)
1109 (((
1110 **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]]**
1111 )))
1112
1113 * Downlink Payload (prefix 0xA5):
1114
1115 (% class="box infomessage" %)
1116 (((
1117 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1118 )))
1119
1120 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1121
1122 * AT Command:
1123
1124 (% class="box infomessage" %)
1125 (((
1126 **AT+SETCNT=aa,(bb cc dd ee) **
1127 )))
1128
1129 aa: 1: Set count1,
1130
1131 2: Set count2,
1132
1133 3: Set AV1 count
1134
1135 Bb cc dd ee: number to be set
1136
1137 * Downlink Payload (prefix 0xA8):
1138
1139 (% class="box infomessage" %)
1140 (((
1141 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1142 )))
1143
1144 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1145
1146 Clear counting for counting mode
1147
1148 * AT Command:
1149
1150 (% class="box infomessage" %)
1151 (((
1152 **AT+CLRCOUNT ~/~/ clear all counting**
1153 )))
1154
1155 * Downlink Payload (prefix 0xA6):
1156
1157 (% class="box infomessage" %)
1158 (((
1159 **0x A6 01     ~/~/ clear all counting,**
1160 )))
1161
1162 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1163
1164 * AT Command:
1165
1166 (% class="box infomessage" %)
1167 (((
1168 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1169 )))
1170
1171 * Downlink Payload (prefix 0xA7):
1172
1173 (% class="box infomessage" %)
1174 (((
1175 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1176 )))
1177
1178 range: aa bb cc:0 to 16777215,  (unit:second)
1179
1180 == 3.5 Integrate with Mydevice ==
1181
1182 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:
1183
1184 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1185
1186 **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:
1187
1188 [[image:1653356737703-362.png||height="232" width="732"]]
1189
1190 [[image:image-20220524094641-11.png||height="390" width="723"]]
1191
1192
1193 [[image:image-20220524094641-12.png||height="402" width="718"]]
1194
1195 **Step 3**: Create an account or log in Mydevices.
1196
1197 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1198
1199 Search under The things network
1200
1201 [[image:1653356838789-523.png||height="337" width="740"]]
1202
1203 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1204
1205 [[image:image-20220524094909-1.png||height="335" width="729"]]
1206
1207 [[image:image-20220524094909-2.png||height="337" width="729"]]
1208
1209 [[image:image-20220524094909-3.png||height="338" width="727"]]
1210
1211 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1212
1213 [[image:image-20220524094909-5.png||height="341" width="734"]]
1214
1215 == 3.6 Interface Detail ==
1216
1217 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1218
1219 Support NPN Type sensor
1220
1221 [[image:1653356991268-289.png]]
1222
1223 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1224
1225 (((
1226 The DI port of LT-22222-L can support NPN or PNP output sensor.
1227 )))
1228
1229 (((
1230 (((
1231 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
1232 )))
1233 )))
1234
1235 [[image:1653357170703-587.png]]
1236
1237 (((
1238 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1239 )))
1240
1241
1242 **Example1**: Connect to a Low active sensor.
1243
1244 This type of sensor will output a low signal GND when active.
1245
1246 * Connect sensor’s output to DI1-
1247 * Connect sensor’s VCC to DI1+.
1248
1249 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1250
1251 //IF// = DI1+ / 1K.
1252
1253 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1254
1255
1256 **Example2**: Connect to a High active sensor.
1257
1258 This type of sensor will output a high signal (example 24v) when active.
1259
1260 * Connect sensor’s output to DI1+
1261 * Connect sensor’s GND DI1-.
1262
1263 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1264
1265 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
1266
1267 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:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1268
1269
1270 **Example3**: Connect to a 220v high active sensor.
1271
1272 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1273
1274 * Connect sensor’s output to DI1+ with a serial 50K resistor
1275 * Connect sensor’s GND DI1-.
1276
1277 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1278
1279 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
1280
1281 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.
1282
1283 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1284
1285 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1286
1287 [[image:1653357531600-905.png]]
1288
1289 === 3.6.4 Analog Input Interface ===
1290
1291 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:
1292
1293 **AC2 = (IN2 voltage )/12**
1294
1295 [[image:1653357592296-182.png]]
1296
1297 Example to connect a 4~~20mA sensor
1298
1299 We take the wind speed sensor as an example for reference only.
1300
1301 Specifications of the wind speed sensor:
1302
1303 Red:12~~24v
1304
1305 Yellow:4~~20mA
1306
1307 Black:GND
1308
1309
1310 Connection diagram:
1311
1312 [[image:1653357640609-758.png]]
1313
1314 [[image:1653357648330-671.png||height="155" width="733"]]
1315
1316 === 3.6.5 Relay Output ===
1317
1318 (((
1319 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:
1320 )))
1321
1322 [[image:image-20220524100215-9.png]]
1323
1324 [[image:image-20220524100215-10.png||height="382" width="723"]]
1325
1326 == 3.7 LEDs Indicators ==
1327
1328 [[image:image-20220524100748-11.png]]
1329
1330 = 4. Use AT Command =
1331
1332 == 4.1 Access AT Command ==
1333
1334 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.
1335
1336 [[image:1653358238933-385.png]]
1337
1338 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:
1339
1340 [[image:1653358355238-883.png]]
1341
1342 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/]]
1343
1344 (((
1345 AT+<CMD>?        : Help on <CMD>
1346 )))
1347
1348 (((
1349 AT+<CMD>         : Run <CMD>
1350 )))
1351
1352 (((
1353 AT+<CMD>=<value> : Set the value
1354 )))
1355
1356 (((
1357 AT+<CMD>=?       : Get the value
1358 )))
1359
1360 (((
1361 ATZ: Trig a reset of the MCU
1362 )))
1363
1364 (((
1365 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1366 )))
1367
1368 (((
1369 AT+DEUI: Get or Set the Device EUI
1370 )))
1371
1372 (((
1373 AT+DADDR: Get or Set the Device Address
1374 )))
1375
1376 (((
1377 AT+APPKEY: Get or Set the Application Key
1378 )))
1379
1380 (((
1381 AT+NWKSKEY: Get or Set the Network Session Key
1382 )))
1383
1384 (((
1385 AT+APPSKEY: Get or Set the Application Session Key
1386 )))
1387
1388 (((
1389 AT+APPEUI: Get or Set the Application EUI
1390 )))
1391
1392 (((
1393 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1394 )))
1395
1396 (((
1397 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1398 )))
1399
1400 (((
1401 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1402 )))
1403
1404 (((
1405 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1406 )))
1407
1408 (((
1409 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1410 )))
1411
1412 (((
1413 AT+RX2FQ: Get or Set the Rx2 window frequency
1414 )))
1415
1416 (((
1417 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1418 )))
1419
1420 (((
1421 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1422 )))
1423
1424 (((
1425 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1426 )))
1427
1428 (((
1429 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1430 )))
1431
1432 (((
1433 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1434 )))
1435
1436 (((
1437 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1438 )))
1439
1440 (((
1441 AT+NWKID: Get or Set the Network ID
1442 )))
1443
1444 (((
1445 AT+FCU: Get or Set the Frame Counter Uplink
1446 )))
1447
1448 (((
1449 AT+FCD: Get or Set the Frame Counter Downlink
1450 )))
1451
1452 (((
1453 AT+CLASS: Get or Set the Device Class
1454 )))
1455
1456 (((
1457 AT+JOIN: Join network
1458 )))
1459
1460 (((
1461 AT+NJS: Get OTAA Join Status
1462 )))
1463
1464 (((
1465 AT+SENDB: Send hexadecimal data along with the application port
1466 )))
1467
1468 (((
1469 AT+SEND: Send text data along with the application port
1470 )))
1471
1472 (((
1473 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1474 )))
1475
1476 (((
1477 AT+RECV: Print last received data in raw format
1478 )))
1479
1480 (((
1481 AT+VER: Get current image version and Frequency Band
1482 )))
1483
1484 (((
1485 AT+CFM: Get or Set the confirmation mode (0-1)
1486 )))
1487
1488 (((
1489 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1490 )))
1491
1492 (((
1493 AT+SNR: Get the SNR of the last received packet
1494 )))
1495
1496 (((
1497 AT+RSSI: Get the RSSI of the last received packet
1498 )))
1499
1500 (((
1501 AT+TDC: Get or set the application data transmission interval in ms
1502 )))
1503
1504 (((
1505 AT+PORT: Get or set the application port
1506 )))
1507
1508 (((
1509 AT+DISAT: Disable AT commands
1510 )))
1511
1512 (((
1513 AT+PWORD: Set password, max 9 digits
1514 )))
1515
1516 (((
1517 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1518 )))
1519
1520 (((
1521 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1522 )))
1523
1524 (((
1525 AT+CFG: Print all settings
1526 )))
1527
1528 == 4.2 Common AT Command Sequence ==
1529
1530 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1531
1532 (((
1533 If device has not joined network yet:
1534 )))
1535
1536 (((
1537 (% style="background-color:#dcdcdc" %)123456
1538 )))
1539
1540 (((
1541 (% style="background-color:#dcdcdc" %)AT+FDR
1542 )))
1543
1544 (((
1545 (% style="background-color:#dcdcdc" %)123456
1546 )))
1547
1548 (((
1549 (% style="background-color:#dcdcdc" %)AT+NJM=0
1550 )))
1551
1552 (((
1553 (% style="background-color:#dcdcdc" %)ATZ
1554 )))
1555
1556
1557 (((
1558 If device already joined network:
1559 )))
1560
1561 (((
1562 (% style="background-color:#dcdcdc" %)AT+NJM=0
1563 )))
1564
1565 (((
1566 (% style="background-color:#dcdcdc" %)ATZ
1567 )))
1568
1569 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1570
1571 (((
1572 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1573 )))
1574
1575 (((
1576 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1577 )))
1578
1579 (((
1580 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1581 )))
1582
1583 (((
1584 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1585 )))
1586
1587 (((
1588 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1589 )))
1590
1591 (((
1592 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1593 )))
1594
1595 (((
1596 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1597 )))
1598
1599 (((
1600 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1601 )))
1602
1603 (((
1604 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1605 )))
1606
1607 (((
1608 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1609 )))
1610
1611 (((
1612 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1613 )))
1614
1615 (((
1616 (% 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.
1617 )))
1618
1619 (((
1620 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1621 )))
1622
1623 (((
1624 (% style="color:red" %)**Note:**
1625 )))
1626
1627 (((
1628 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1629 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1630 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.
1631 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
1632 )))
1633
1634 (((
1635 [[image:1653359097980-169.png||height="188" width="729"]]
1636 )))
1637
1638 (((
1639
1640 )))
1641
1642 === 4.2.3 Change to Class A ===
1643
1644 If sensor JOINED
1645 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1646 ATZ
1647
1648 = 5. FAQ =
1649
1650 == 5.1 How to upgrade the image? ==
1651
1652 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1653
1654 * Support new features
1655 * For bug fix
1656 * Change LoRaWAN bands.
1657 Below shows the hardware connection for how to upload an image to the LT:
1658 * [[image:1653359603330-121.png]]
1659
1660 **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]].
1661 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1662 **Step3: **Open flashloader; choose the correct COM port to update.
1663 **For LT-22222-L**:
1664 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.
1665
1666 [[image:image-20220524103407-12.png]]
1667
1668 [[image:image-20220524103429-13.png]]
1669
1670 [[image:image-20220524104033-15.png]]
1671
1672 (% 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:
1673
1674 [[image:1653360054704-518.png||height="186" width="745"]]
1675
1676 (((
1677 (((
1678 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1679 )))
1680 )))
1681
1682 (((
1683 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.
1684 )))
1685
1686 (((
1687 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1688 )))
1689
1690 (((
1691 (((
1692 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1693 )))
1694 )))
1695
1696 (((
1697 (((
1698 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1699 )))
1700 )))
1701
1702 (((
1703 (% 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.
1704 )))
1705
1706 (((
1707 [[image:1653360231087-571.png||height="401" width="727"]]
1708 )))
1709
1710 (% 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.
1711
1712 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1713
1714 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1715 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1716 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1717 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1718 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1719 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1720 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1721 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1722 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1723 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1724
1725 As shown in below:
1726
1727 [[image:1653360498588-932.png||height="485" width="726"]]
1728
1729 == 5.4 Can I see counting event in Serial? ==
1730
1731 (((
1732 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.
1733 )))
1734
1735 (((
1736 = 6. Trouble Shooting =
1737 )))
1738
1739 (((
1740 (((
1741 == 6.1 Downlink doesn’t work, how to solve it? ==
1742 )))
1743 )))
1744
1745 (((
1746 Please see this link for how to debug:
1747
1748 [[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/]]
1749 )))
1750
1751 (((
1752 [[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]]
1753 )))
1754
1755 (((
1756 == 6.2 Have trouble to upload image. ==
1757 )))
1758
1759 (((
1760 See this link for trouble shooting:
1761 )))
1762
1763 (((
1764 [[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]]
1765 )))
1766
1767 (((
1768 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1769 )))
1770
1771 (((
1772 It might be about the channels mapping. Please see this link for detail:
1773 )))
1774
1775 (((
1776 [[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]]
1777 )))
1778
1779 (((
1780 = 7. Order Info =
1781 )))
1782
1783 (((
1784 (((
1785 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1786 )))
1787 )))
1788
1789 (((
1790 (((
1791 (% style="color:#4f81bd" %)**XXX:**
1792 )))
1793 )))
1794
1795 * (((
1796 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1797 )))
1798 * (((
1799 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1800 )))
1801 * (((
1802 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1803 )))
1804 * (((
1805 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1806 )))
1807 * (((
1808 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1809 )))
1810 * (((
1811 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1812 )))
1813 * (((
1814 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1815 )))
1816 * (((
1817 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1818 )))
1819
1820 (((
1821 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1822
1823 = 8. Packing Info =
1824 )))
1825
1826 (((
1827 (((
1828 **Package Includes**:
1829 )))
1830 )))
1831
1832 (((
1833 (((
1834 * LT-22222-L I/O Controller x 1
1835 * Stick Antenna for LoRa RF part x 1
1836 * Bracket for controller x1
1837 * Program cable x 1
1838 )))
1839 )))
1840
1841 (((
1842 (((
1843 **Dimension and weight**:
1844 )))
1845 )))
1846
1847 (((
1848 (((
1849 * Device Size: 13.5 x 7 x 3 cm
1850 * Device Weight: 105g
1851 * Package Size / pcs : 14.5 x 8 x 5 cm
1852 * Weight / pcs : 170g
1853 )))
1854 )))
1855
1856 (((
1857 = 9. Support =
1858 )))
1859
1860 * (((
1861 (((
1862 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.
1863 )))
1864 )))
1865 * (((
1866 (((
1867 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
1868 )))
1869 )))
1870
1871 (((
1872 (((
1873 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1874 )))
1875
1876 (((
1877 = 10. Reference​​​​​ =
1878
1879 * Product Page:
1880
1881 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]]
1882
1883 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1884 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1885 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1886 )))
1887 )))