Version 79.3 by Xiaoling on 2022/06/10 09:41
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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
15
16
17 = 1.Introduction =
18
19 == 1.1 What is LT Series I/O Controller ==
20
21 (((
22 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.
23 )))
24
25 (((
26 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.
27 )))
28
29 (((
30 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
31 )))
32
33 (((
34 The use environment includes:
35 )))
36
37 (((
38 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.
39 )))
40
41 (((
42 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
43 )))
44
45 (((
46 [[image:1653295757274-912.png]]
47
48
49 )))
50
51 == 1.2  Specifications ==
52
53 (((
54
55
56 **Hardware System:**
57 )))
58
59 * (((
60 STM32L072CZT6 MCU
61 )))
62 * (((
63 SX1276/78 Wireless Chip 
64 )))
65 * (((
66 (((
67 Power Consumption:
68 )))
69
70 * (((
71 Idle: 4mA@12v
72 )))
73 * (((
74 20dB Transmit: 34mA@12v
75 )))
76 )))
77
78 (((
79
80
81 **Interface for Model: LT22222-L:**
82 )))
83
84 * (((
85 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
86 )))
87 * (((
88 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
89 )))
90 * (((
91 2 x Relay Output (5A@250VAC / 30VDC)
92 )))
93 * (((
94 2 x 0~~20mA Analog Input (res:0.01mA)
95 )))
96 * (((
97 2 x 0~~30V Analog Input (res:0.01v)
98 )))
99 * (((
100 Power Input 7~~ 24V DC. 
101 )))
102
103 (((
104
105
106 **LoRa Spec:**
107 )))
108
109 * (((
110 (((
111 Frequency Range:
112 )))
113
114 * (((
115 Band 1 (HF): 862 ~~ 1020 Mhz
116 )))
117 * (((
118 Band 2 (LF): 410 ~~ 528 Mhz
119 )))
120 )))
121 * (((
122 168 dB maximum link budget.
123 )))
124 * (((
125 +20 dBm - 100 mW constant RF output vs.
126 )))
127 * (((
128 +14 dBm high efficiency PA.
129 )))
130 * (((
131 Programmable bit rate up to 300 kbps.
132 )))
133 * (((
134 High sensitivity: down to -148 dBm.
135 )))
136 * (((
137 Bullet-proof front end: IIP3 = -12.5 dBm.
138 )))
139 * (((
140 Excellent blocking immunity.
141 )))
142 * (((
143 Low RX current of 10.3 mA, 200 nA register retention.
144 )))
145 * (((
146 Fully integrated synthesizer with a resolution of 61 Hz.
147 )))
148 * (((
149 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
150 )))
151 * (((
152 Built-in bit synchronizer for clock recovery.
153 )))
154 * (((
155 Preamble detection.
156 )))
157 * (((
158 127 dB Dynamic Range RSSI.
159 )))
160 * (((
161 Automatic RF Sense and CAD with ultra-fast AFC.
162 )))
163 * (((
164 Packet engine up to 256 bytes with CRC.
165 )))
166
167 == 1.3 Features ==
168
169 * LoRaWAN Class A & Class C protocol
170 * Optional Customized LoRa Protocol
171 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
172 * AT Commands to change parameters
173 * Remote configure parameters via LoRa Downlink
174 * Firmware upgradable via program port
175 * Counting
176
177 == 1.4  Applications ==
178
179 * Smart Buildings & Home Automation
180 * Logistics and Supply Chain Management
181 * Smart Metering
182 * Smart Agriculture
183 * Smart Cities
184 * Smart Factory
185
186 == 1.5 Hardware Variants ==
187
188 (% border="1" style="background-color:#f7faff; width:500px" %)
189 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
190 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
191 * 2 x Digital Input (Bi-direction)
192 * 2 x Digital Output
193 * 2 x Relay Output (5A@250VAC / 30VDC)
194 * 2 x 0~~20mA Analog Input (res:0.01mA)
195 * 2 x 0~~30V Analog Input (res:0.01v)
196 * 1 x Counting Port
197 )))
198
199 = 2. Power ON Device =
200
201 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.
202
203 (((
204 PWR will on when device is properly powered.
205 )))
206
207 [[image:1653297104069-180.png]]
208
209
210
211 = 3. Operation Mode =
212
213 == 3.1 How it works? ==
214
215 (((
216 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. 
217 )))
218
219 (((
220 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.
221 )))
222
223
224 == 3.2 Example to join LoRaWAN network ==
225
226 (((
227 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. 
228 )))
229
230 [[image:image-20220523172350-1.png||height="266" width="864"]]
231
232
233 (((
234 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:
235 )))
236
237 (((
238 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
239 )))
240
241 (((
242 Each LT is shipped with a sticker with the default device EUI as below:
243 )))
244
245 [[image:1653297924498-393.png]]
246
247
248 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
249
250 Add APP EUI in the application.
251
252 [[image:1653297955910-247.png||height="321" width="716"]]
253
254
255 Add APP KEY and DEV EUI
256
257 [[image:1653298023685-319.png]]
258
259
260 (((
261 (% 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.
262 )))
263
264 [[image:1653298044601-602.png||height="405" width="709"]]
265
266
267
268 == 3.3 Uplink Payload ==
269
270 There are five working modes + one interrupt mode on LT for different type application:
271
272 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
273 * **MOD2**: Double DI Counting + DO + RO
274 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
275 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
276 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
277 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
278
279
280 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
281
282 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
283
284 [[image:image-20220523174024-3.png]]
285
286 (((
287
288
289 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
290 )))
291
292 [[image:image-20220523174254-4.png]]
293
294 * RO is for relay. ROx=1 : close，ROx=0 always open.
295 * DI is for digital input. DIx=1: high or float, DIx=0: low.
296 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
297
298 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
299
300 For example if payload is: [[image:image-20220523175847-2.png]]
301
302
303 **The value for the interface is:  **
304
305 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
306
307 AVI2 channel voltage is 0x04AC/1000=1.196V
308
309 ACI1 channel current is 0x1310/1000=4.880mA
310
311 ACI2 channel current is 0x1300/1000=4.864mA
312
313 The last byte 0xAA= 10101010(B) means
314
315 * [1] RO1 relay channel is close and the RO1 LED is ON.
316 * [0] RO2 relay channel is open and RO2 LED is OFF;
317
318
319
320 **LT22222-L:**
321
322 * [1] DI2 channel is high input and DI2 LED is ON;
323 * [0] DI1 channel is low input;
324
325 * [0] DO3 channel output state
326 ** DO3 is float in case no load between DO3 and V+.;
327 ** DO3 is high in case there is load between DO3 and V+.
328 ** DO3 LED is off in both case
329 * [1] DO2 channel output is low and DO2 LED is ON.
330 * [0] DO1 channel output state
331 ** DO1 is float in case no load between DO1 and V+.;
332 ** DO1 is high in case there is load between DO1 and V+.
333 ** DO1 LED is off in both case
334
335
336 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
337
338
339 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
340
341 (((
342 Total : 11 bytes payload
343 )))
344
345 [[image:image-20220523180452-3.png]]
346
347
348 (((
349 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
350 )))
351
352 [[image:image-20220523180506-4.png]]
353
354 * RO is for relay. ROx=1 : close，ROx=0 always open.
355 * FIRST: Indicate this is the first packet after join network.
356 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
357
358 (((
359 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
360 )))
361
362 (((
363
364
365 **To use counting mode, please run:**
366 )))
367
368 (% class="box infomessage" %)
369 (((
370 (((
371 **AT+MOD=2**
372 )))
373 )))
374
375 (% class="box infomessage" %)
376 (((
377 (((
378 **ATZ**
379 )))
380 )))
381
382 (((
383
384
385 (% style="color:#4f81bd" %)**AT Commands for counting:**
386 )))
387
388 (((
389 **For LT22222-L:**
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
396 )))
397 )))
398
399 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
403 )))
404 )))
405
406 (% class="box infomessage" %)
407 (((
408 (((
409 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
410 )))
411 )))
412
413 (% class="box infomessage" %)
414 (((
415 (((
416 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
417 )))
418 )))
419
420 (% class="box infomessage" %)
421 (((
422 (((
423 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
424 )))
425 )))
426
427 (% class="box infomessage" %)
428 (((
429 (((
430 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
431 )))
432 )))
433
434
435
436 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
437
438 **LT22222-L**: This mode the DI1 is used as a counting pin.
439
440 [[image:image-20220523181246-5.png]]
441
442 (((
443 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
444 )))
445
446 [[image:image-20220523181301-6.png]]
447
448 * RO is for relay. ROx=1 : close，ROx=0 always open.
449 * FIRST: Indicate this is the first packet after join network.
450 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
451
452 (((
453 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
454 )))
455
456 (((
457 **To use counting mode, please run:**
458 )))
459
460 (% class="box infomessage" %)
461 (((
462 (((
463 **AT+MOD=3**
464 )))
465 )))
466
467 (% class="box infomessage" %)
468 (((
469 (((
470 **ATZ**
471 )))
472 )))
473
474 (((
475 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
476 )))
477
478
479
480 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
481
482
483 **LT22222-L**: This mode the DI1 is used as a counting pin.
484
485 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.
486
487 [[image:image-20220523181903-8.png]]
488
489
490 (((
491 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
492 )))
493
494 [[image:image-20220523181727-7.png]]
495
496 * RO is for relay. ROx=1 : close，ROx=0 always open.
497 * FIRST: Indicate this is the first packet after join network.
498 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
499
500 (((
501 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
502 )))
503
504 (((
505
506
507 **To use this mode, please run:**
508 )))
509
510 (% class="box infomessage" %)
511 (((
512 (((
513 **AT+MOD=4**
514 )))
515 )))
516
517 (% class="box infomessage" %)
518 (((
519 (((
520 **ATZ**
521 )))
522 )))
523
524 (((
525
526 )))
527
528 (((
529 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
530 )))
531
532 (((
533
534
535 **Plus below command for AVI1 Counting:**
536 )))
537
538 (% class="box infomessage" %)
539 (((
540 (((
541 **AT+SETCNT=3,60   (set AVI Count to 60)**
542 )))
543 )))
544
545 (% class="box infomessage" %)
546 (((
547 (((
548 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
549 )))
550 )))
551
552 (% class="box infomessage" %)
553 (((
554 (((
555 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
556 )))
557 )))
558
559 (% class="box infomessage" %)
560 (((
561 (((
562 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
563 )))
564 )))
565
566
567
568 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
569
570
571 **LT22222-L**: This mode the DI1 is used as a counting pin.
572
573 [[image:image-20220523182334-9.png]]
574
575 (((
576
577
578 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
579 )))
580
581 * RO is for relay. ROx=1 : close，ROx=0 always open.
582 * FIRST: Indicate this is the first packet after join network.
583 * (((
584 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
585 )))
586
587 (((
588 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
589 )))
590
591 (((
592
593
594 **To use this mode, please run:**
595 )))
596
597 (% class="box infomessage" %)
598 (((
599 (((
600 **AT+MOD=5**
601 )))
602 )))
603
604 (% class="box infomessage" %)
605 (((
606 (((
607 **ATZ**
608 )))
609 )))
610
611 (((
612 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
613 )))
614
615
616
617 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
618
619
620 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
621
622 For example, if user has configured below commands:
623
624 * **AT+MOD=1 ** **~-~->** The normal working mode
625 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
626
627 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
628
629 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
630 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.**
631
632 **AT Command to set Trigger Condition**:
633
634 (% style="color:#4f81bd" %)**Trigger base on voltage**:
635
636 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
637
638 **Example:**
639
640 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)
641
642 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
643
644
645
646 (% style="color:#4f81bd" %)**Trigger base on current**:
647
648 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
649
650 **Example:**
651
652 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
653
654
655
656 (% style="color:#4f81bd" %)**Trigger base on DI status**:
657
658 DI status trigger Flag.
659
660 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
661
662
663 **Example:**
664
665 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
666
667
668 **Downlink Command to set Trigger Condition:**
669
670 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
671
672 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
673
674 AA: Code for this downlink Command:
675
676 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
677
678 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
679
680 yy2 yy2: AC1 or AV1 high limit.
681
682 yy3 yy3: AC2 or AV2 low limit.
683
684 Yy4 yy4: AC2 or AV2 high limit.
685
686
687 **Example1**: AA 00 13 88 00 00 00 00 00 00
688
689 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
690
691
692 **Example2**: AA 02 01 00
693
694 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
695
696
697
698 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
699
700 MOD6 Payload : total 11 bytes payload
701
702 [[image:image-20220524085923-1.png]]
703
704
705 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
706
707 [[image:image-20220524090106-2.png]]
708
709 * Each bits shows if the corresponding trigger has been configured.
710
711 **Example:**
712
713 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
714
715
716 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
717
718 [[image:image-20220524090249-3.png]]
719
720 * Each bits shows which status has been trigger on this uplink.
721
722 **Example:**
723
724 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
725
726
727 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
728
729 [[image:image-20220524090456-4.png]]
730
731 * Each bits shows which status has been trigger on this uplink.
732
733 **Example:**
734
735 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
736
737 00000101: Means both DI1 and DI2 trigger are enabled.
738
739
740 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
741
742 Downlink command to poll MOD6 status:
743
744 **AB 06**
745
746 When device got this command, it will send the MOD6 payload.
747
748
749
750 === 3.3.7 Payload Decoder ===
751
752 (((
753
754
755 **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/]]
756
757
758 )))
759
760
761 == 3.4 ​Configure LT via AT or Downlink ==
762
763 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
764
765 (((
766 There are two kinds of Commands:
767 )))
768
769 * (% 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]]
770
771 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
772
773 === 3.4.1 Common Commands ===
774
775 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]]
776
777
778
779 === 3.4.2 Sensor related commands ===
780
781 ==== 3.4.2.1 Set Transmit Interval ====
782
783 Set device uplink interval.
784
785 * AT Command:
786
787 (% class="box infomessage" %)
788 (((
789 **AT+TDC=N **
790 )))
791
792 **Example: **AT+TDC=30000. Means set interval to 30 seconds
793
794
795 * Downlink Payload (prefix 0x01):
796
797 (% class="box infomessage" %)
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 Set work mode.
807
808 * AT Command:
809
810 (% class="box infomessage" %)
811 (((
812 **AT+MOD=N  **
813 )))
814
815 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
816
817
818 * Downlink Payload (prefix 0x0A):
819
820 (% class="box infomessage" %)
821 (((
822 **0x0A aa     ~/~/ Same as AT+MOD=aa**
823 )))
824
825
826
827 ==== 3.4.2.3 Poll an uplink ====
828
829 * AT Command:
830
831 There is no AT Command to poll uplink
832
833
834 * Downlink Payload (prefix 0x08):
835
836 (% class="box infomessage" %)
837 (((
838 **0x08 FF     ~/~/ Poll an uplink,**
839 )))
840
841 **Example**: 0x08FF, ask device to send an Uplink
842
843
844
845 ==== 3.4.2.4 Enable Trigger Mode ====
846
847 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
848
849 * AT Command:
850
851 (% class="box infomessage" %)
852 (((
853 **AT+ADDMOD6=1 or 0**
854 )))
855
856 1: Enable Trigger Mode
857
858 0: Disable Trigger Mode
859
860
861 * Downlink Payload (prefix 0x0A 06):
862
863 (% class="box infomessage" %)
864 (((
865 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
866 )))
867
868
869
870 ==== 3.4.2.5 Poll trigger settings ====
871
872 Poll trigger settings,
873
874 * AT Command:
875
876 There is no AT Command for this feature.
877
878
879 * Downlink Payload (prefix 0x AB 06):
880
881 (% class="box infomessage" %)
882 (((
883 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
884 )))
885
886
887
888 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
889
890 Enable Disable DI1/DI2/DI2 as trigger,
891
892 * AT Command:
893
894 (% class="box infomessage" %)
895 (((
896 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
897 )))
898
899
900 **Example:**
901
902 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
903
904 * Downlink Payload (prefix 0xAA 02):
905
906 (% class="box infomessage" %)
907 (((
908 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
909 )))
910
911
912
913 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
914
915 Set DI1 or DI3(for LT-33222-L) trigger.
916
917 * AT Command:
918
919 (% class="box infomessage" %)
920 (((
921 **AT+TRIG1=a,b**
922 )))
923
924 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
925
926 b : delay timing.
927
928
929 **Example:**
930
931 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
932
933
934 * Downlink Payload (prefix 0x09 01 ):
935
936 (% class="box infomessage" %)
937 (((
938 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
939 )))
940
941
942
943 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
944
945 Set DI2 trigger.
946
947 * AT Command:
948
949 (% class="box infomessage" %)
950 (((
951 **AT+TRIG2=a,b**
952 )))
953
954 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
955
956 b : delay timing.
957
958
959 **Example:**
960
961 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
962
963
964 * Downlink Payload (prefix 0x09 02 ):
965
966 (% class="box infomessage" %)
967 (((
968 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
969 )))
970
971
972
973 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
974
975 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
976
977 * AT Command:
978
979 (% class="box infomessage" %)
980 (((
981 **AT+ACLIM. **
982 )))
983
984
985 * Downlink Payload (prefix 0xAA 01 ):
986
987 (% class="box infomessage" %)
988 (((
989 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
990 )))
991
992
993
994 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
995
996 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
997
998 * AT Command:
999
1000 (% class="box infomessage" %)
1001 (((
1002 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1003 )))
1004
1005
1006 * Downlink Payload (prefix 0xAA 00 ):
1007
1008 (% class="box infomessage" %)
1009 (((
1010 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1011 )))
1012
1013
1014
1015 ==== 3.4.2.11 Trigger – Set minimum interval ====
1016
1017 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1018
1019 * AT Command:
1020
1021 (% class="box infomessage" %)
1022 (((
1023 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1024 )))
1025
1026
1027 * Downlink Payload (prefix 0xAC ):
1028
1029 (% class="box infomessage" %)
1030 (((
1031 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1032 )))
1033
1034
1035
1036 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1037
1038 * AT Command:
1039
1040 There is no AT Command to control Digital Output
1041
1042
1043 * Downlink Payload (prefix 0x02):
1044
1045 (% class="box infomessage" %)
1046 (((
1047 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1048 )))
1049
1050 (((
1051 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1052 )))
1053
1054 (((
1055 01: Low,  00: High ,  11: No action
1056 )))
1057
1058 [[image:image-20220524092754-5.png]]
1059
1060 (((
1061 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1062 )))
1063
1064 (((
1065 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1066 )))
1067
1068
1069
1070 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1071
1072 * AT Command:
1073
1074 There is no AT Command to control Digital Output
1075
1076
1077 * Downlink Payload (prefix 0xA9):
1078
1079 (% class="box infomessage" %)
1080 (((
1081 (((
1082 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1083 )))
1084 )))
1085
1086 This is to control the digital output time of DO pin. Include four bytes:
1087
1088 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1089
1090 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1091
1092 01: DO pins will change back to original state after timeout.
1093
1094 00: DO pins will change to an inverter state after timeout 
1095
1096
1097 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1098
1099 [[image:image-20220524093238-6.png]]
1100
1101
1102 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1103
1104 [[image:image-20220524093328-7.png]]
1105
1106
1107 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1108
1109 [[image:image-20220524093351-8.png]]
1110
1111
1112 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1113
1114 Latching time. Unit: ms
1115
1116 Device will upload a packet if downlink code executes successfully.
1117
1118
1119 **Example payload:**
1120
1121 **~1. A9 01 01 01 01 07 D0**
1122
1123 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1124
1125 **2. A9 01 00 01 11 07 D0**
1126
1127 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1128
1129 **3. A9 00 00 00 00 07 D0**
1130
1131 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1132
1133 **4. A9 00 11 01 00 07 D0**
1134
1135 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
1136
1137
1138
1139 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1140
1141 * AT Command:
1142
1143 There is no AT Command to control Relay Output
1144
1145
1146 * Downlink Payload (prefix 0x03):
1147
1148 (% class="box infomessage" %)
1149 (((
1150 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1151 )))
1152
1153 (((
1154 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1155 )))
1156
1157 (((
1158 01: Close ,  00: Open , 11: No action
1159 )))
1160
1161 (((
1162 [[image:image-20220524093724-9.png]]
1163 )))
1164
1165 Device will upload a packet if downlink code executes successfully.
1166
1167
1168
1169 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1170
1171 * AT Command:
1172
1173 There is no AT Command to control Relay Output
1174
1175
1176 * Downlink Payload (prefix 0x05):
1177
1178 (% class="box infomessage" %)
1179 (((
1180 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1181 )))
1182
1183 This is to control the relay output time of relay. Include four bytes:
1184
1185 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1186
1187 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1188
1189 01: Relays will change back to original state after timeout.
1190
1191 00: Relays will change to an inverter state after timeout
1192
1193
1194 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1195
1196 [[image:image-20220524093831-10.png]]
1197
1198
1199 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1200
1201 Device will upload a packet if downlink code executes successfully.
1202
1203
1204 **Example payload:**
1205
1206 **~1. 05 01 11 07 D0**
1207
1208 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1209
1210 **2. 05 01 10 07 D0**
1211
1212 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1213
1214 **3. 05 00 01 07 D0**
1215
1216 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1217
1218 **4. 05 00 00 07 D0**
1219
1220 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1221
1222
1223
1224 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1225
1226 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1227
1228 * AT Command:
1229
1230 (% class="box infomessage" %)
1231 (((
1232 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1233 )))
1234
1235
1236 * Downlink Payload (prefix 0xA5):
1237
1238 (% class="box infomessage" %)
1239 (((
1240 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1241 )))
1242
1243
1244
1245 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1246
1247 * AT Command:
1248
1249 (% class="box infomessage" %)
1250 (((
1251 **AT+SETCNT=aa,(bb cc dd ee) **
1252 )))
1253
1254 aa: 1: Set count1,
1255
1256 2: Set count2,
1257
1258 3: Set AV1 count
1259
1260 Bb cc dd ee: number to be set
1261
1262
1263 * Downlink Payload (prefix 0xA8):
1264
1265 (% class="box infomessage" %)
1266 (((
1267 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1268 )))
1269
1270
1271
1272 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1273
1274 Clear counting for counting mode
1275
1276 * AT Command:
1277
1278 (% class="box infomessage" %)
1279 (((
1280 **AT+CLRCOUNT ~/~/ clear all counting**
1281 )))
1282
1283 * Downlink Payload (prefix 0xA6):
1284
1285 (% class="box infomessage" %)
1286 (((
1287 **0x A6 01     ~/~/ clear all counting,**
1288 )))
1289
1290
1291
1292 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1293
1294 * AT Command:
1295
1296 (% class="box infomessage" %)
1297 (((
1298 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1299 )))
1300
1301 * Downlink Payload (prefix 0xA7):
1302
1303 (% class="box infomessage" %)
1304 (((
1305 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1306 )))
1307
1308 (((
1309 range: aa bb cc:0 to 16777215,  (unit:second)
1310
1311
1312 )))
1313
1314
1315 == 3.5 Integrate with Mydevice ==
1316
1317 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:
1318
1319 (((
1320 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1321 )))
1322
1323 (((
1324 (% 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:
1325 )))
1326
1327 [[image:1653356737703-362.png||height="232" width="732"]]
1328
1329 [[image:image-20220524094641-11.png||height="390" width="723"]]
1330
1331
1332 [[image:image-20220524094641-12.png||height="402" width="718"]]
1333
1334
1335 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1336
1337 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1338
1339 Search under The things network
1340
1341 [[image:1653356838789-523.png||height="337" width="740"]]
1342
1343
1344
1345 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1346
1347 [[image:image-20220524094909-1.png||height="335" width="729"]]
1348
1349
1350 [[image:image-20220524094909-2.png||height="337" width="729"]]
1351
1352
1353 [[image:image-20220524094909-3.png||height="338" width="727"]]
1354
1355
1356 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1357
1358
1359 [[image:image-20220524094909-5.png||height="341" width="734"]]
1360
1361
1362
1363 == 3.6 Interface Detail ==
1364
1365 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1366
1367 Support NPN Type sensor
1368
1369 [[image:1653356991268-289.png]]
1370
1371
1372
1373 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1374
1375 (((
1376 The DI port of LT-22222-L can support NPN or PNP output sensor.
1377 )))
1378
1379 (((
1380 (((
1381 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
1382 )))
1383 )))
1384
1385 [[image:1653357170703-587.png]]
1386
1387 (((
1388 (((
1389 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1390 )))
1391 )))
1392
1393 (((
1394
1395 )))
1396
1397 (((
1398 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1399 )))
1400
1401 (((
1402 This type of sensor will output a low signal GND when active.
1403 )))
1404
1405 * (((
1406 Connect sensor’s output to DI1-
1407 )))
1408 * (((
1409 Connect sensor’s VCC to DI1+.
1410 )))
1411
1412 (((
1413 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1414 )))
1415
1416 (((
1417 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1418 )))
1419
1420 (((
1421 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.
1422 )))
1423
1424 (((
1425
1426 )))
1427
1428 (((
1429 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1430 )))
1431
1432 (((
1433 This type of sensor will output a high signal (example 24v) when active.
1434 )))
1435
1436 * (((
1437 Connect sensor’s output to DI1+
1438 )))
1439 * (((
1440 Connect sensor’s GND DI1-.
1441 )))
1442
1443 (((
1444 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1445 )))
1446
1447 (((
1448 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1449 )))
1450
1451 (((
1452 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.
1453 )))
1454
1455 (((
1456
1457 )))
1458
1459 (((
1460 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1461 )))
1462
1463 (((
1464 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1465 )))
1466
1467 * (((
1468 Connect sensor’s output to DI1+ with a serial 50K resistor
1469 )))
1470 * (((
1471 Connect sensor’s GND DI1-.
1472 )))
1473
1474 (((
1475 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1476 )))
1477
1478 (((
1479 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1480 )))
1481
1482 (((
1483 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.
1484 )))
1485
1486
1487
1488 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1489
1490 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1491
1492 [[image:1653357531600-905.png]]
1493
1494
1495
1496 === 3.6.4 Analog Input Interface ===
1497
1498 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:
1499
1500
1501 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1502
1503 [[image:1653357592296-182.png]]
1504
1505 Example to connect a 4~~20mA sensor
1506
1507 We take the wind speed sensor as an example for reference only.
1508
1509
1510 **Specifications of the wind speed sensor:**
1511
1512 Red:  12~~24v
1513
1514 Yellow:  4~~20mA
1515
1516 Black:  GND
1517
1518
1519 **Connection diagram:**
1520
1521 [[image:1653357640609-758.png]]
1522
1523 [[image:1653357648330-671.png||height="155" width="733"]]
1524
1525
1526
1527 === 3.6.5 Relay Output ===
1528
1529 (((
1530 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:
1531 )))
1532
1533 [[image:image-20220524100215-9.png]]
1534
1535 [[image:image-20220524100215-10.png||height="382" width="723"]]
1536
1537
1538
1539 == 3.7 LEDs Indicators ==
1540
1541 [[image:image-20220524100748-11.png]]
1542
1543
1544 = 4. Use AT Command =
1545
1546 == 4.1 Access AT Command ==
1547
1548 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.
1549
1550 [[image:1653358238933-385.png]]
1551
1552
1553 (((
1554 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:
1555 )))
1556
1557 [[image:1653358355238-883.png]]
1558
1559
1560 (((
1561 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/]]
1562 )))
1563
1564 (((
1565 AT+<CMD>?        : Help on <CMD>
1566 )))
1567
1568 (((
1569 AT+<CMD>         : Run <CMD>
1570 )))
1571
1572 (((
1573 AT+<CMD>=<value> : Set the value
1574 )))
1575
1576 (((
1577 AT+<CMD>=?       : Get the value
1578 )))
1579
1580 (((
1581 ATZ: Trig a reset of the MCU
1582 )))
1583
1584 (((
1585 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1586 )))
1587
1588 (((
1589 AT+DEUI: Get or Set the Device EUI
1590 )))
1591
1592 (((
1593 AT+DADDR: Get or Set the Device Address
1594 )))
1595
1596 (((
1597 AT+APPKEY: Get or Set the Application Key
1598 )))
1599
1600 (((
1601 AT+NWKSKEY: Get or Set the Network Session Key
1602 )))
1603
1604 (((
1605 AT+APPSKEY: Get or Set the Application Session Key
1606 )))
1607
1608 (((
1609 AT+APPEUI: Get or Set the Application EUI
1610 )))
1611
1612 (((
1613 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1614 )))
1615
1616 (((
1617 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1618 )))
1619
1620 (((
1621 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1622 )))
1623
1624 (((
1625 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1626 )))
1627
1628 (((
1629 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1630 )))
1631
1632 (((
1633 AT+RX2FQ: Get or Set the Rx2 window frequency
1634 )))
1635
1636 (((
1637 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1638 )))
1639
1640 (((
1641 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1642 )))
1643
1644 (((
1645 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1646 )))
1647
1648 (((
1649 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1650 )))
1651
1652 (((
1653 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1654 )))
1655
1656 (((
1657 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1658 )))
1659
1660 (((
1661 AT+NWKID: Get or Set the Network ID
1662 )))
1663
1664 (((
1665 AT+FCU: Get or Set the Frame Counter Uplink
1666 )))
1667
1668 (((
1669 AT+FCD: Get or Set the Frame Counter Downlink
1670 )))
1671
1672 (((
1673 AT+CLASS: Get or Set the Device Class
1674 )))
1675
1676 (((
1677 AT+JOIN: Join network
1678 )))
1679
1680 (((
1681 AT+NJS: Get OTAA Join Status
1682 )))
1683
1684 (((
1685 AT+SENDB: Send hexadecimal data along with the application port
1686 )))
1687
1688 (((
1689 AT+SEND: Send text data along with the application port
1690 )))
1691
1692 (((
1693 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1694 )))
1695
1696 (((
1697 AT+RECV: Print last received data in raw format
1698 )))
1699
1700 (((
1701 AT+VER: Get current image version and Frequency Band
1702 )))
1703
1704 (((
1705 AT+CFM: Get or Set the confirmation mode (0-1)
1706 )))
1707
1708 (((
1709 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1710 )))
1711
1712 (((
1713 AT+SNR: Get the SNR of the last received packet
1714 )))
1715
1716 (((
1717 AT+RSSI: Get the RSSI of the last received packet
1718 )))
1719
1720 (((
1721 AT+TDC: Get or set the application data transmission interval in ms
1722 )))
1723
1724 (((
1725 AT+PORT: Get or set the application port
1726 )))
1727
1728 (((
1729 AT+DISAT: Disable AT commands
1730 )))
1731
1732 (((
1733 AT+PWORD: Set password, max 9 digits
1734 )))
1735
1736 (((
1737 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1738 )))
1739
1740 (((
1741 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1742 )))
1743
1744 (((
1745 AT+CFG: Print all settings
1746
1747
1748 )))
1749
1750
1751
1752 == 4.2 Common AT Command Sequence ==
1753
1754 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1755
1756 (((
1757
1758
1759 **If device has not joined network yet:**
1760 )))
1761
1762 (((
1763 (% style="background-color:#dcdcdc" %)123456
1764 )))
1765
1766 (((
1767 (% style="background-color:#dcdcdc" %)AT+FDR
1768 )))
1769
1770 (((
1771 (% style="background-color:#dcdcdc" %)123456
1772 )))
1773
1774 (((
1775 (% style="background-color:#dcdcdc" %)AT+NJM=0
1776 )))
1777
1778 (((
1779 (% style="background-color:#dcdcdc" %)ATZ
1780 )))
1781
1782
1783 (((
1784 **If device already joined network:**
1785 )))
1786
1787 (((
1788 (% style="background-color:#dcdcdc" %)AT+NJM=0
1789 )))
1790
1791 (((
1792 (% style="background-color:#dcdcdc" %)ATZ
1793
1794
1795 )))
1796
1797
1798
1799 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1800
1801 (((
1802
1803
1804 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1805 )))
1806
1807 (((
1808 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1809 )))
1810
1811 (((
1812 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1813 )))
1814
1815 (((
1816 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1817 )))
1818
1819 (((
1820 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1821 )))
1822
1823 (((
1824 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1825 )))
1826
1827 (((
1828 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1829 )))
1830
1831 (((
1832 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1833 )))
1834
1835 (((
1836 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1837 )))
1838
1839 (((
1840 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1841 )))
1842
1843 (((
1844 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1845 )))
1846
1847 (((
1848 (% 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.
1849 )))
1850
1851 (((
1852 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1853
1854
1855 )))
1856
1857 (((
1858 (% style="color:red" %)**Note:**
1859 )))
1860
1861 (((
1862 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1863 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1864 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.
1865 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
1866 )))
1867
1868 (((
1869 [[image:1653359097980-169.png||height="188" width="729"]]
1870 )))
1871
1872 (((
1873
1874 )))
1875
1876
1877 === 4.2.3 Change to Class A ===
1878
1879 If sensor JOINED
1880 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1881 ATZ
1882
1883
1884 = 5. FAQ =
1885
1886 == 5.1 How to upgrade the image? ==
1887
1888
1889 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1890
1891 * Support new features
1892 * For bug fix
1893 * Change LoRaWAN bands.
1894
1895 Below shows the hardware connection for how to upload an image to the LT:
1896
1897 [[image:1653359603330-121.png]]
1898
1899
1900 (((
1901 (% 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]].
1902 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1903 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1904
1905
1906 (% style="color:blue" %)**For LT-22222-L**(%%):
1907 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.
1908 )))
1909
1910 [[image:image-20220524103407-12.png]]
1911
1912 [[image:image-20220524103429-13.png]]
1913
1914 [[image:image-20220524104033-15.png]]
1915
1916
1917 (% 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:
1918
1919 [[image:1653360054704-518.png||height="186" width="745"]]
1920
1921
1922 (((
1923 (((
1924
1925
1926 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1927 )))
1928 )))
1929
1930 (((
1931 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1932 )))
1933
1934 (((
1935
1936
1937 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1938 )))
1939
1940 (((
1941 (((
1942 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1943 )))
1944 )))
1945
1946 (((
1947 (((
1948 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1949
1950
1951 )))
1952 )))
1953
1954 (((
1955 (% 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.
1956 )))
1957
1958 (((
1959 [[image:1653360231087-571.png||height="401" width="727"]]
1960 )))
1961
1962 (((
1963 (% 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.
1964 )))
1965
1966
1967 (((
1968 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1969 )))
1970
1971 (((
1972 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1973 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1974 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1975 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1976 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1977 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1978 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1979 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1980 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1981 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1982 )))
1983
1984
1985 (((
1986 As shown in below:
1987 )))
1988
1989 [[image:1653360498588-932.png||height="485" width="726"]]
1990
1991
1992 == 5.4 Can I see counting event in Serial? ==
1993
1994 (((
1995 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.
1996
1997
1998 == 5.5 Can i use point to point communication for LT-22222-L? ==
1999
2000 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2001 )))
2002
2003 (((
2004
2005
2006 = 6. Trouble Shooting =
2007 )))
2008
2009 (((
2010 (((
2011 == 6.1 Downlink doesn’t work, how to solve it? ==
2012 )))
2013 )))
2014
2015 (((
2016 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2017 )))
2018
2019 (((
2020
2021
2022 == 6.2 Have trouble to upload image. ==
2023 )))
2024
2025 (((
2026 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2027 )))
2028
2029 (((
2030
2031
2032 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2033 )))
2034
2035 (((
2036 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2037 )))
2038
2039
2040
2041 = 7. Order Info =
2042
2043
2044 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2045
2046
2047 (% style="color:#4f81bd" %)**XXX:**
2048
2049 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2050 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2051 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2052 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2053 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2054 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2055 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2056 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2057 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2058
2059 = 8. Packing Info =
2060
2061
2062 **Package Includes**:
2063
2064 * LT-22222-L I/O Controller x 1
2065 * Stick Antenna for LoRa RF part x 1
2066 * Bracket for controller x1
2067 * Program cable x 1
2068
2069 **Dimension and weight**:
2070
2071 * Device Size: 13.5 x 7 x 3 cm
2072 * Device Weight: 105g
2073 * Package Size / pcs : 14.5 x 8 x 5 cm
2074 * Weight / pcs : 170g
2075
2076 = 9. Support =
2077
2078 * (((
2079 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.
2080 )))
2081 * (((
2082 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]]
2083 )))
2084
2085 = 10. Reference​​​​​ =
2086
2087 * 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]]
2088 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2089 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2090 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
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