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Version 77.18 by Xiaoling on 2022/06/10 08:40
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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 **Interface for Model: LT22222-L:**
81 )))
82
83 * (((
84 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
85 )))
86 * (((
87 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
88 )))
89 * (((
90 2 x Relay Output (5A@250VAC / 30VDC)
91 )))
92 * (((
93 2 x 0~~20mA Analog Input (res:0.01mA)
94 )))
95 * (((
96 2 x 0~~30V Analog Input (res:0.01v)
97 )))
98 * (((
99 Power Input 7~~ 24V DC. 
100 )))
101
102
103 (((
104 **LoRa Spec:**
105 )))
106
107 * (((
108 (((
109 Frequency Range:
110 )))
111
112 * (((
113 Band 1 (HF): 862 ~~ 1020 Mhz
114 )))
115 * (((
116 Band 2 (LF): 410 ~~ 528 Mhz
117 )))
118 )))
119 * (((
120 168 dB maximum link budget.
121 )))
122 * (((
123 +20 dBm - 100 mW constant RF output vs.
124 )))
125 * (((
126 +14 dBm high efficiency PA.
127 )))
128 * (((
129 Programmable bit rate up to 300 kbps.
130 )))
131 * (((
132 High sensitivity: down to -148 dBm.
133 )))
134 * (((
135 Bullet-proof front end: IIP3 = -12.5 dBm.
136 )))
137 * (((
138 Excellent blocking immunity.
139 )))
140 * (((
141 Low RX current of 10.3 mA, 200 nA register retention.
142 )))
143 * (((
144 Fully integrated synthesizer with a resolution of 61 Hz.
145 )))
146 * (((
147 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
148 )))
149 * (((
150 Built-in bit synchronizer for clock recovery.
151 )))
152 * (((
153 Preamble detection.
154 )))
155 * (((
156 127 dB Dynamic Range RSSI.
157 )))
158 * (((
159 Automatic RF Sense and CAD with ultra-fast AFC.
160 )))
161 * (((
162 Packet engine up to 256 bytes with CRC.
163
164
165 )))
166
167
168
169 == 1.3 Features ==
170
171 * LoRaWAN Class A & Class C protocol
172 * Optional Customized LoRa Protocol
173 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
174 * AT Commands to change parameters
175 * Remote configure parameters via LoRa Downlink
176 * Firmware upgradable via program port
177 * Counting
178
179
180
181 == 1.4  Applications ==
182
183 * Smart Buildings & Home Automation
184 * Logistics and Supply Chain Management
185 * Smart Metering
186 * Smart Agriculture
187 * Smart Cities
188 * Smart Factory
189
190
191
192 == 1.5 Hardware Variants ==
193
194 (% border="1" style="background-color:#f7faff; width:500px" %)
195 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
196 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
197 * 2 x Digital Input (Bi-direction)
198 * 2 x Digital Output
199 * 2 x Relay Output (5A@250VAC / 30VDC)
200 * 2 x 0~~20mA Analog Input (res:0.01mA)
201 * 2 x 0~~30V Analog Input (res:0.01v)
202 * 1 x Counting Port
203 )))
204
205
206
207 = 2. Power ON Device =
208
209 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.
210
211 (((
212 PWR will on when device is properly powered.
213 )))
214
215 [[image:1653297104069-180.png]]
216
217
218
219 = 3. Operation Mode =
220
221 == 3.1 How it works? ==
222
223 (((
224 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. 
225 )))
226
227 (((
228 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.
229
230
231 )))
232
233
234
235 == 3.2 Example to join LoRaWAN network ==
236
237 (((
238 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. 
239 )))
240
241 [[image:image-20220523172350-1.png||height="266" width="864"]]
242
243 (((
244 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:
245 )))
246
247 (((
248 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
249 )))
250
251 (((
252 Each LT is shipped with a sticker with the default device EUI as below:
253 )))
254
255 [[image:1653297924498-393.png]]
256
257 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
258
259 Add APP EUI in the application.
260
261 [[image:1653297955910-247.png||height="321" width="716"]]
262
263
264 Add APP KEY and DEV EUI
265
266 [[image:1653298023685-319.png]]
267
268
269 (((
270 **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.
271 )))
272
273 [[image:1653298044601-602.png||height="405" width="709"]]
274
275
276
277 == 3.3 Uplink Payload ==
278
279 There are five working modes + one interrupt mode on LT for different type application:
280
281 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
282 * **MOD2**: Double DI Counting + DO + RO
283 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
284 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
285 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
286 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
287
288
289
290 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
291
292 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
293
294 [[image:image-20220523174024-3.png]]
295
296 (((
297 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
298 )))
299
300 [[image:image-20220523174254-4.png]]
301
302 * RO is for relay. ROx=1 : close，ROx=0 always open.
303 * DI is for digital input. DIx=1: high or float, DIx=0: low.
304 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
305
306 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
307
308 For example if payload is: [[image:image-20220523175847-2.png]]
309
310 **The value for the interface is:  **
311
312 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
313
314 AVI2 channel voltage is 0x04AC/1000=1.196V
315
316 ACI1 channel current is 0x1310/1000=4.880mA
317
318 ACI2 channel current is 0x1300/1000=4.864mA
319
320 The last byte 0xAA= 10101010(B) means
321
322 * [1] RO1 relay channel is close and the RO1 LED is ON.
323 * [0] RO2 relay channel is open and RO2 LED is OFF;
324
325
326 **LT22222-L:**
327
328 * [1] DI2 channel is high input and DI2 LED is ON;
329 * [0] DI1 channel is low input;
330
331 * [0] DO3 channel output state
332 ** DO3 is float in case no load between DO3 and V+.;
333 ** DO3 is high in case there is load between DO3 and V+.
334 ** DO3 LED is off in both case
335 * [1] DO2 channel output is low and DO2 LED is ON.
336 * [0] DO1 channel output state
337 ** DO1 is float in case no load between DO1 and V+.;
338 ** DO1 is high in case there is load between DO1 and V+.
339 ** DO1 LED is off in both case
340
341
342
343 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
344
345 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
346
347 (((
348 Total : 11 bytes payload
349 )))
350
351 [[image:image-20220523180452-3.png]]
352
353 (((
354 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
355 )))
356
357 [[image:image-20220523180506-4.png]]
358
359 * RO is for relay. ROx=1 : close，ROx=0 always open.
360 * FIRST: Indicate this is the first packet after join network.
361 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
362
363 (((
364 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
365 )))
366
367 (((
368 **To use counting mode, please run:**
369 )))
370
371 (% class="box infomessage" %)
372 (((
373 (((
374 **AT+MOD=2**
375 )))
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **ATZ**
382 )))
383 )))
384
385 (((
386 (% style="color:#4f81bd" %)**AT Commands for counting:**
387 )))
388
389 (((
390 **For LT22222-L:**
391 )))
392
393 (% class="box infomessage" %)
394 (((
395 (((
396 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
397 )))
398 )))
399
400 (% class="box infomessage" %)
401 (((
402 (((
403 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
404 )))
405 )))
406
407 (% class="box infomessage" %)
408 (((
409 (((
410 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
411 )))
412 )))
413
414 (% class="box infomessage" %)
415 (((
416 (((
417 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
418 )))
419 )))
420
421 (% class="box infomessage" %)
422 (((
423 (((
424 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
425 )))
426 )))
427
428 (% class="box infomessage" %)
429 (((
430 (((
431 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
432 )))
433 )))
434
435
436
437 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
438
439 **LT22222-L**: This mode the DI1 is used as a counting pin.
440
441 [[image:image-20220523181246-5.png]]
442
443 (((
444 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
445 )))
446
447 [[image:image-20220523181301-6.png]]
448
449 * RO is for relay. ROx=1 : close，ROx=0 always open.
450 * FIRST: Indicate this is the first packet after join network.
451 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
452
453 (((
454 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
455 )))
456
457 (((
458 **To use counting mode, please run:**
459 )))
460
461 (% class="box infomessage" %)
462 (((
463 (((
464 **AT+MOD=3**
465 )))
466 )))
467
468 (% class="box infomessage" %)
469 (((
470 (((
471 **ATZ**
472 )))
473 )))
474
475 (((
476 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
477
478
479 )))
480
481
482
483 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
484
485 **LT22222-L**: This mode the DI1 is used as a counting pin.
486
487 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.
488
489 [[image:image-20220523181903-8.png]]
490
491 (((
492 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
493 )))
494
495 [[image:image-20220523181727-7.png]]
496
497 * RO is for relay. ROx=1 : close，ROx=0 always open.
498 * FIRST: Indicate this is the first packet after join network.
499 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
500
501 (((
502 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
503 )))
504
505 (((
506 **To use this mode, please run:**
507 )))
508
509 (% class="box infomessage" %)
510 (((
511 (((
512 **AT+MOD=4**
513 )))
514 )))
515
516 (% class="box infomessage" %)
517 (((
518 (((
519 **ATZ**
520 )))
521 )))
522
523 (((
524
525 )))
526
527 (((
528 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
529 )))
530
531 (((
532 **Plus below command for AVI1 Counting:**
533 )))
534
535 (% class="box infomessage" %)
536 (((
537 (((
538 **AT+SETCNT=3,60   (set AVI Count to 60)**
539 )))
540 )))
541
542 (% class="box infomessage" %)
543 (((
544 (((
545 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
546 )))
547 )))
548
549 (% class="box infomessage" %)
550 (((
551 (((
552 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
553 )))
554 )))
555
556 (% class="box infomessage" %)
557 (((
558 (((
559 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
560 )))
561 )))
562
563
564
565 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
566
567 **LT22222-L**: This mode the DI1 is used as a counting pin.
568
569 [[image:image-20220523182334-9.png]]
570
571 (((
572 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
573 )))
574
575 * RO is for relay. ROx=1 : close，ROx=0 always open.
576 * FIRST: Indicate this is the first packet after join network.
577 * (((
578 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
579 )))
580
581 (((
582 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
583 )))
584
585 (((
586 **To use this mode, please run:**
587 )))
588
589 (% class="box infomessage" %)
590 (((
591 (((
592 **AT+MOD=5**
593 )))
594 )))
595
596 (% class="box infomessage" %)
597 (((
598 (((
599 **ATZ**
600 )))
601 )))
602
603 (((
604 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
605
606
607 )))
608
609
610
611 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
612
613 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
614
615 For example, if user has configured below commands:
616
617 * **AT+MOD=1 ** **~-~->** The normal working mode
618 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
619
620 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
621
622 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
623 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.**
624
625 **AT Command to set Trigger Condition**:
626
627 (% style="color:#4f81bd" %)**Trigger base on voltage**:
628
629 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
630
631 **Example:**
632
633 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)
634
635 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
636
637
638 (% style="color:#4f81bd" %)**Trigger base on current**:
639
640 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
641
642 **Example:**
643
644 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
645
646
647 (% style="color:#4f81bd" %)**Trigger base on DI status**:
648
649 DI status trigger Flag.
650
651 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
652
653 **Example:**
654
655 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
656
657
658 **Downlink Command to set Trigger Condition**
659
660 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
661
662 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
663
664 AA: Code for this downlink Command:
665
666 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
667
668 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
669
670 yy2 yy2: AC1 or AV1 high limit.
671
672 yy3 yy3: AC2 or AV2 low limit.
673
674 Yy4 yy4: AC2 or AV2 high limit.
675
676 **Example1**: AA 00 13 88 00 00 00 00 00 00
677
678 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
679
680 **Example2**: AA 02 01 00
681
682 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
683
684 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
685
686 MOD6 Payload : total 11 bytes payload
687
688 [[image:image-20220524085923-1.png]]
689
690 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
691
692 [[image:image-20220524090106-2.png]]
693
694 * Each bits shows if the corresponding trigger has been configured.
695
696 **Example:**
697
698 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
699
700
701 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
702
703 [[image:image-20220524090249-3.png]]
704
705 * Each bits shows which status has been trigger on this uplink.
706
707 **Example:**
708
709 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
710
711
712 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
713
714 [[image:image-20220524090456-4.png]]
715
716 * Each bits shows which status has been trigger on this uplink.
717
718 **Example:**
719
720 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
721
722 00000101: Means both DI1 and DI2 trigger are enabled.
723
724
725 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
726
727 Downlink command to poll MOD6 status:
728
729 **AB 06**
730
731 When device got this command, it will send the MOD6 payload.
732
733
734
735 === 3.3.7 Payload Decoder ===
736
737 (((
738 **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/]]
739
740
741 )))
742
743
744
745 == 3.4 ​Configure LT via AT or Downlink ==
746
747 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
748
749 (((
750 There are two kinds of Commands:
751 )))
752
753 * (% 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]]
754
755 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
756
757
758
759 === 3.4.1 Common Commands ===
760
761 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]]
762
763
764
765 === 3.4.2 Sensor related commands ===
766
767 ==== 3.4.2.1 Set Transmit Interval ====
768
769 Set device uplink interval.
770
771 * AT Command:
772
773 (% class="box infomessage" %)
774 (((
775 **AT+TDC=N **
776 )))
777
778 **Example: **AT+TDC=30000. Means set interval to 30 seconds
779
780 * Downlink Payload (prefix 0x01):
781
782 (% class="box infomessage" %)
783 (((
784 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
785 )))
786
787
788 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
789
790 Set work mode.
791
792 * AT Command:
793
794 (% class="box infomessage" %)
795 (((
796 **AT+MOD=N  **
797 )))
798
799 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
800
801 * Downlink Payload (prefix 0x0A):
802
803 (% class="box infomessage" %)
804 (((
805 **0x0A aa     ~/~/ Same as AT+MOD=aa**
806 )))
807
808
809 ==== 3.4.2.3 Poll an uplink ====
810
811 * AT Command:
812
813 There is no AT Command to poll uplink
814
815 * Downlink Payload (prefix 0x08):
816
817 (% class="box infomessage" %)
818 (((
819 **0x08 FF     ~/~/ Poll an uplink,**
820 )))
821
822 **Example**: 0x08FF, ask device to send an Uplink
823
824
825 ==== 3.4.2.4 Enable Trigger Mode ====
826
827 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
828
829 * AT Command:
830
831 (% class="box infomessage" %)
832 (((
833 **AT+ADDMOD6=1 or 0**
834 )))
835
836 1: Enable Trigger Mode
837
838 0: Disable Trigger Mode
839
840 * Downlink Payload (prefix 0x0A 06):
841
842 (% class="box infomessage" %)
843 (((
844 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
845 )))
846
847
848 ==== 3.4.2.5 Poll trigger settings ====
849
850 Poll trigger settings,
851
852 * AT Command:
853
854 There is no AT Command for this feature.
855
856 * Downlink Payload (prefix 0x AB 06):
857
858 (% class="box infomessage" %)
859 (((
860 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
861 )))
862
863
864 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
865
866 Enable Disable DI1/DI2/DI2 as trigger,
867
868 * AT Command:
869
870 (% class="box infomessage" %)
871 (((
872 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
873 )))
874
875 **Example:**
876
877 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
878
879 * Downlink Payload (prefix 0xAA 02):
880
881 (% class="box infomessage" %)
882 (((
883 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
884 )))
885
886
887 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
888
889 Set DI1 or DI3(for LT-33222-L) trigger.
890
891 * AT Command:
892
893 (% class="box infomessage" %)
894 (((
895 **AT+TRIG1=a,b**
896 )))
897
898 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
899
900 b : delay timing.
901
902 **Example:**
903
904 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
905
906 * Downlink Payload (prefix 0x09 01 ):
907
908 (% class="box infomessage" %)
909 (((
910 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
911 )))
912
913
914 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
915
916 Set DI2 trigger.
917
918 * AT Command:
919
920 (% class="box infomessage" %)
921 (((
922 **AT+TRIG2=a,b**
923 )))
924
925 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
926
927 b : delay timing.
928
929 **Example:**
930
931 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
932
933 * Downlink Payload (prefix 0x09 02 ):
934
935 (% class="box infomessage" %)
936 (((
937 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
938 )))
939
940
941 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
942
943 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
944
945 * AT Command:
946
947 (% class="box infomessage" %)
948 (((
949 **AT+ACLIM. **
950 )))
951
952 * Downlink Payload (prefix 0xAA 01 ):
953
954 (% class="box infomessage" %)
955 (((
956 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
957 )))
958
959
960 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
961
962 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
963
964 * AT Command:
965
966 (% class="box infomessage" %)
967 (((
968 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
969 )))
970
971 * Downlink Payload (prefix 0xAA 00 ):
972
973 (% class="box infomessage" %)
974 (((
975 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
976 )))
977
978
979 ==== 3.4.2.11 Trigger – Set minimum interval ====
980
981 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
982
983 * AT Command:
984
985 (% class="box infomessage" %)
986 (((
987 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
988 )))
989
990 * Downlink Payload (prefix 0xAC ):
991
992 (% class="box infomessage" %)
993 (((
994 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
995 )))
996
997
998 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
999
1000 * AT Command:
1001
1002 There is no AT Command to control Digital Output
1003
1004 * Downlink Payload (prefix 0x02):
1005
1006 (% class="box infomessage" %)
1007 (((
1008 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1009 )))
1010
1011 (((
1012 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1013 )))
1014
1015 (((
1016 01: Low,  00: High ,  11: No action
1017 )))
1018
1019 [[image:image-20220524092754-5.png]]
1020
1021 (((
1022 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1023 )))
1024
1025 (((
1026 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1027 )))
1028
1029
1030 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1031
1032 * AT Command:
1033
1034 There is no AT Command to control Digital Output
1035
1036 * Downlink Payload (prefix 0xA9):
1037
1038 (% class="box infomessage" %)
1039 (((
1040 (((
1041 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1042 )))
1043 )))
1044
1045 This is to control the digital output time of DO pin. Include four bytes:
1046
1047 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1048
1049 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1050
1051 01: DO pins will change back to original state after timeout.
1052
1053 00: DO pins will change to an inverter state after timeout 
1054
1055 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1056
1057 [[image:image-20220524093238-6.png]]
1058
1059 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1060
1061 [[image:image-20220524093328-7.png]]
1062
1063 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1064
1065 [[image:image-20220524093351-8.png]]
1066
1067 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1068
1069 Latching time. Unit: ms
1070
1071 Device will upload a packet if downlink code executes successfully.
1072
1073 **Example payload:**
1074
1075 **~1. A9 01 01 01 01 07 D0**
1076
1077 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1078
1079 **2. A9 01 00 01 11 07 D0**
1080
1081 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1082
1083 **3. A9 00 00 00 00 07 D0**
1084
1085 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1086
1087 **4. A9 00 11 01 00 07 D0**
1088
1089 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
1090
1091
1092 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1093
1094 * AT Command:
1095
1096 There is no AT Command to control Relay Output
1097
1098 * Downlink Payload (prefix 0x03):
1099
1100 (% class="box infomessage" %)
1101 (((
1102 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1103 )))
1104
1105 (((
1106 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1107 )))
1108
1109 (((
1110 01: Close ,  00: Open , 11: No action
1111 )))
1112
1113 (((
1114 [[image:image-20220524093724-9.png]]
1115 )))
1116
1117 Device will upload a packet if downlink code executes successfully.
1118
1119
1120 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1121
1122 * AT Command:
1123
1124 There is no AT Command to control Relay Output
1125
1126 * Downlink Payload (prefix 0x05):
1127
1128 (% class="box infomessage" %)
1129 (((
1130 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1131 )))
1132
1133 This is to control the relay output time of relay. Include four bytes:
1134
1135 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1136
1137 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1138
1139 01: Relays will change back to original state after timeout.
1140
1141 00: Relays will change to an inverter state after timeout
1142
1143 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1144
1145 [[image:image-20220524093831-10.png]]
1146
1147 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1148
1149 Device will upload a packet if downlink code executes successfully.
1150
1151 **Example payload:**
1152
1153 **~1. 05 01 11 07 D0**
1154
1155 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1156
1157 **2. 05 01 10 07 D0**
1158
1159 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1160
1161 **3. 05 00 01 07 D0**
1162
1163 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1164
1165 **4. 05 00 00 07 D0**
1166
1167 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1168
1169
1170 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1171
1172 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1173
1174 * AT Command:
1175
1176 (% class="box infomessage" %)
1177 (((
1178 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1179 )))
1180
1181 * Downlink Payload (prefix 0xA5):
1182
1183 (% class="box infomessage" %)
1184 (((
1185 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1186 )))
1187
1188
1189 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1190
1191 * AT Command:
1192
1193 (% class="box infomessage" %)
1194 (((
1195 **AT+SETCNT=aa,(bb cc dd ee) **
1196 )))
1197
1198 aa: 1: Set count1,
1199
1200 2: Set count2,
1201
1202 3: Set AV1 count
1203
1204 Bb cc dd ee: number to be set
1205
1206 * Downlink Payload (prefix 0xA8):
1207
1208 (% class="box infomessage" %)
1209 (((
1210 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1211 )))
1212
1213
1214 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1215
1216 Clear counting for counting mode
1217
1218 * AT Command:
1219
1220 (% class="box infomessage" %)
1221 (((
1222 **AT+CLRCOUNT ~/~/ clear all counting**
1223 )))
1224
1225 * Downlink Payload (prefix 0xA6):
1226
1227 (% class="box infomessage" %)
1228 (((
1229 **0x A6 01     ~/~/ clear all counting,**
1230 )))
1231
1232
1233 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1234
1235 * AT Command:
1236
1237 (% class="box infomessage" %)
1238 (((
1239 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1240 )))
1241
1242 * Downlink Payload (prefix 0xA7):
1243
1244 (% class="box infomessage" %)
1245 (((
1246 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1247 )))
1248
1249 (((
1250 range: aa bb cc:0 to 16777215,  (unit:second)
1251
1252
1253 )))
1254
1255 == 3.5 Integrate with Mydevice ==
1256
1257 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:
1258
1259 (((
1260 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1261 )))
1262
1263 (((
1264 **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:
1265 )))
1266
1267 [[image:1653356737703-362.png||height="232" width="732"]]
1268
1269 [[image:image-20220524094641-11.png||height="390" width="723"]]
1270
1271 [[image:image-20220524094641-12.png||height="402" width="718"]]
1272
1273
1274 **Step 3**: Create an account or log in Mydevices.
1275
1276 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1277
1278 Search under The things network
1279
1280 [[image:1653356838789-523.png||height="337" width="740"]]
1281
1282
1283 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1284
1285 [[image:image-20220524094909-1.png||height="335" width="729"]]
1286
1287 [[image:image-20220524094909-2.png||height="337" width="729"]]
1288
1289 [[image:image-20220524094909-3.png||height="338" width="727"]]
1290
1291 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1292
1293 [[image:image-20220524094909-5.png||height="341" width="734"]]
1294
1295
1296 == 3.6 Interface Detail ==
1297
1298 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1299
1300 Support NPN Type sensor
1301
1302 [[image:1653356991268-289.png]]
1303
1304
1305 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1306
1307 (((
1308 The DI port of LT-22222-L can support NPN or PNP output sensor.
1309 )))
1310
1311 (((
1312 (((
1313 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
1314 )))
1315 )))
1316
1317 [[image:1653357170703-587.png]]
1318
1319 (((
1320 (((
1321 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1322 )))
1323 )))
1324
1325 (((
1326
1327 )))
1328
1329 (((
1330 **Example1**: Connect to a Low active sensor.
1331 )))
1332
1333 (((
1334 This type of sensor will output a low signal GND when active.
1335 )))
1336
1337 * (((
1338 Connect sensor’s output to DI1-
1339 )))
1340 * (((
1341 Connect sensor’s VCC to DI1+.
1342 )))
1343
1344 (((
1345 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1346 )))
1347
1348 (((
1349 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1350 )))
1351
1352 (((
1353 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.
1354 )))
1355
1356 (((
1357
1358 )))
1359
1360 (((
1361 **Example2**: Connect to a High active sensor.
1362 )))
1363
1364 (((
1365 This type of sensor will output a high signal (example 24v) when active.
1366 )))
1367
1368 * (((
1369 Connect sensor’s output to DI1+
1370 )))
1371 * (((
1372 Connect sensor’s GND DI1-.
1373 )))
1374
1375 (((
1376 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1377 )))
1378
1379 (((
1380 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1381 )))
1382
1383 (((
1384 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.
1385 )))
1386
1387 (((
1388
1389 )))
1390
1391 (((
1392 **Example3**: Connect to a 220v high active sensor.
1393 )))
1394
1395 (((
1396 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1397 )))
1398
1399 * (((
1400 Connect sensor’s output to DI1+ with a serial 50K resistor
1401 )))
1402 * (((
1403 Connect sensor’s GND DI1-.
1404 )))
1405
1406 (((
1407 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1408 )))
1409
1410 (((
1411 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1412 )))
1413
1414 (((
1415 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.
1416 )))
1417
1418
1419 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1420
1421 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1422
1423 [[image:1653357531600-905.png]]
1424
1425
1426 === 3.6.4 Analog Input Interface ===
1427
1428 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:
1429
1430 **AC2 = (IN2 voltage )/12**
1431
1432 [[image:1653357592296-182.png]]
1433
1434 Example to connect a 4~~20mA sensor
1435
1436 We take the wind speed sensor as an example for reference only.
1437
1438 Specifications of the wind speed sensor:
1439
1440 Red:12~~24v
1441
1442 Yellow:4~~20mA
1443
1444 Black:GND
1445
1446
1447 Connection diagram:
1448
1449 [[image:1653357640609-758.png]]
1450
1451 [[image:1653357648330-671.png||height="155" width="733"]]
1452
1453
1454 === 3.6.5 Relay Output ===
1455
1456 (((
1457 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:
1458 )))
1459
1460 [[image:image-20220524100215-9.png]]
1461
1462 [[image:image-20220524100215-10.png||height="382" width="723"]]
1463
1464
1465 == 3.7 LEDs Indicators ==
1466
1467 [[image:image-20220524100748-11.png]]
1468
1469
1470 = 4. Use AT Command =
1471
1472 == 4.1 Access AT Command ==
1473
1474 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.
1475
1476 [[image:1653358238933-385.png]]
1477
1478 (((
1479 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:
1480 )))
1481
1482 [[image:1653358355238-883.png]]
1483
1484 (((
1485 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/]]
1486 )))
1487
1488 (((
1489 AT+<CMD>?        : Help on <CMD>
1490 )))
1491
1492 (((
1493 AT+<CMD>         : Run <CMD>
1494 )))
1495
1496 (((
1497 AT+<CMD>=<value> : Set the value
1498 )))
1499
1500 (((
1501 AT+<CMD>=?       : Get the value
1502 )))
1503
1504 (((
1505 ATZ: Trig a reset of the MCU
1506 )))
1507
1508 (((
1509 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1510 )))
1511
1512 (((
1513 AT+DEUI: Get or Set the Device EUI
1514 )))
1515
1516 (((
1517 AT+DADDR: Get or Set the Device Address
1518 )))
1519
1520 (((
1521 AT+APPKEY: Get or Set the Application Key
1522 )))
1523
1524 (((
1525 AT+NWKSKEY: Get or Set the Network Session Key
1526 )))
1527
1528 (((
1529 AT+APPSKEY: Get or Set the Application Session Key
1530 )))
1531
1532 (((
1533 AT+APPEUI: Get or Set the Application EUI
1534 )))
1535
1536 (((
1537 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1538 )))
1539
1540 (((
1541 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1542 )))
1543
1544 (((
1545 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1546 )))
1547
1548 (((
1549 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1550 )))
1551
1552 (((
1553 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1554 )))
1555
1556 (((
1557 AT+RX2FQ: Get or Set the Rx2 window frequency
1558 )))
1559
1560 (((
1561 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1562 )))
1563
1564 (((
1565 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1566 )))
1567
1568 (((
1569 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1570 )))
1571
1572 (((
1573 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1574 )))
1575
1576 (((
1577 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1578 )))
1579
1580 (((
1581 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1582 )))
1583
1584 (((
1585 AT+NWKID: Get or Set the Network ID
1586 )))
1587
1588 (((
1589 AT+FCU: Get or Set the Frame Counter Uplink
1590 )))
1591
1592 (((
1593 AT+FCD: Get or Set the Frame Counter Downlink
1594 )))
1595
1596 (((
1597 AT+CLASS: Get or Set the Device Class
1598 )))
1599
1600 (((
1601 AT+JOIN: Join network
1602 )))
1603
1604 (((
1605 AT+NJS: Get OTAA Join Status
1606 )))
1607
1608 (((
1609 AT+SENDB: Send hexadecimal data along with the application port
1610 )))
1611
1612 (((
1613 AT+SEND: Send text data along with the application port
1614 )))
1615
1616 (((
1617 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1618 )))
1619
1620 (((
1621 AT+RECV: Print last received data in raw format
1622 )))
1623
1624 (((
1625 AT+VER: Get current image version and Frequency Band
1626 )))
1627
1628 (((
1629 AT+CFM: Get or Set the confirmation mode (0-1)
1630 )))
1631
1632 (((
1633 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1634 )))
1635
1636 (((
1637 AT+SNR: Get the SNR of the last received packet
1638 )))
1639
1640 (((
1641 AT+RSSI: Get the RSSI of the last received packet
1642 )))
1643
1644 (((
1645 AT+TDC: Get or set the application data transmission interval in ms
1646 )))
1647
1648 (((
1649 AT+PORT: Get or set the application port
1650 )))
1651
1652 (((
1653 AT+DISAT: Disable AT commands
1654 )))
1655
1656 (((
1657 AT+PWORD: Set password, max 9 digits
1658 )))
1659
1660 (((
1661 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1662 )))
1663
1664 (((
1665 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1666 )))
1667
1668 (((
1669 AT+CFG: Print all settings
1670
1671
1672 )))
1673
1674 == 4.2 Common AT Command Sequence ==
1675
1676 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1677
1678 (((
1679 If device has not joined network yet:
1680 )))
1681
1682 (((
1683 (% style="background-color:#dcdcdc" %)123456
1684 )))
1685
1686 (((
1687 (% style="background-color:#dcdcdc" %)AT+FDR
1688 )))
1689
1690 (((
1691 (% style="background-color:#dcdcdc" %)123456
1692 )))
1693
1694 (((
1695 (% style="background-color:#dcdcdc" %)AT+NJM=0
1696 )))
1697
1698 (((
1699 (% style="background-color:#dcdcdc" %)ATZ
1700 )))
1701
1702
1703 (((
1704 If device already joined network:
1705 )))
1706
1707 (((
1708 (% style="background-color:#dcdcdc" %)AT+NJM=0
1709 )))
1710
1711 (((
1712 (% style="background-color:#dcdcdc" %)ATZ
1713
1714
1715 )))
1716
1717 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1718
1719 (((
1720 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1721 )))
1722
1723 (((
1724 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1725 )))
1726
1727 (((
1728 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1729 )))
1730
1731 (((
1732 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1733 )))
1734
1735 (((
1736 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1737 )))
1738
1739 (((
1740 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1741 )))
1742
1743 (((
1744 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1745 )))
1746
1747 (((
1748 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1749 )))
1750
1751 (((
1752 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1753 )))
1754
1755 (((
1756 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1757 )))
1758
1759 (((
1760 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1761 )))
1762
1763 (((
1764 (% 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.
1765 )))
1766
1767 (((
1768 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1769 )))
1770
1771 (((
1772 (% style="color:red" %)**Note:**
1773 )))
1774
1775 (((
1776 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1777 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1778 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.
1779 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
1780 )))
1781
1782 (((
1783 [[image:1653359097980-169.png||height="188" width="729"]]
1784 )))
1785
1786 (((
1787
1788 )))
1789
1790 === 4.2.3 Change to Class A ===
1791
1792 If sensor JOINED
1793 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1794 ATZ
1795
1796
1797 = 5. FAQ =
1798
1799 == 5.1 How to upgrade the image? ==
1800
1801 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1802
1803 * Support new features
1804 * For bug fix
1805 * Change LoRaWAN bands.
1806 Below shows the hardware connection for how to upload an image to the LT:
1807 * [[image:1653359603330-121.png]]
1808
1809 (((
1810 **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]].
1811 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1812 **Step3: **Open flashloader; choose the correct COM port to update.
1813 **For LT-22222-L**:
1814 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.
1815 )))
1816
1817 [[image:image-20220524103407-12.png]]
1818
1819 [[image:image-20220524103429-13.png]]
1820
1821 [[image:image-20220524104033-15.png]]
1822
1823 (% 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:
1824
1825 [[image:1653360054704-518.png||height="186" width="745"]]
1826
1827
1828 (((
1829 (((
1830 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1831 )))
1832 )))
1833
1834 (((
1835 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1836
1837
1838 )))
1839
1840 (((
1841 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1842 )))
1843
1844 (((
1845 (((
1846 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1847 )))
1848 )))
1849
1850 (((
1851 (((
1852 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1853 )))
1854 )))
1855
1856 (((
1857 (% 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.
1858 )))
1859
1860 (((
1861 [[image:1653360231087-571.png||height="401" width="727"]]
1862 )))
1863
1864 (((
1865 (% 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.
1866 )))
1867
1868 (((
1869 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1870 )))
1871
1872 (((
1873 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1874 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1875 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1876 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1877 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1878 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1879 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1880 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1881 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1882 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1883 )))
1884
1885 (((
1886 As shown in below:
1887 )))
1888
1889 [[image:1653360498588-932.png||height="485" width="726"]]
1890
1891
1892 == 5.4 Can I see counting event in Serial? ==
1893
1894 (((
1895 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.
1896
1897
1898 == 5.5 Can i use point to point communication for LT-22222-L? ==
1899
1900 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1901
1902
1903 )))
1904
1905 (((
1906 = 6. Trouble Shooting =
1907 )))
1908
1909 (((
1910 (((
1911 == 6.1 Downlink doesn’t work, how to solve it? ==
1912 )))
1913 )))
1914
1915 (((
1916 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1917
1918
1919 )))
1920
1921 (((
1922 == 6.2 Have trouble to upload image. ==
1923 )))
1924
1925 (((
1926 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1927 )))
1928
1929 (((
1930
1931 )))
1932
1933 (((
1934 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1935 )))
1936
1937 (((
1938 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1939 )))
1940
1941 (((
1942
1943 )))
1944
1945 (((
1946 = 7. Order Info =
1947 )))
1948
1949 (((
1950 (((
1951 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1952 )))
1953 )))
1954
1955 (((
1956 (((
1957 (% style="color:#4f81bd" %)**XXX:**
1958 )))
1959 )))
1960
1961 (((
1962 * (((
1963 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1964 )))
1965 )))
1966
1967 (((
1968 * (((
1969 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1970 )))
1971 )))
1972
1973 (((
1974 * (((
1975 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1976 )))
1977 )))
1978
1979 (((
1980 * (((
1981 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1982 )))
1983 )))
1984
1985 (((
1986 * (((
1987 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1988 )))
1989 )))
1990
1991 (((
1992 * (((
1993 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1994 )))
1995 )))
1996
1997 (((
1998 * (((
1999 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2000 )))
2001 )))
2002
2003 (((
2004 * (((
2005 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2006 )))
2007 )))
2008
2009 (((
2010 * (((
2011 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2012
2013
2014 )))
2015
2016 = 8. Packing Info =
2017 )))
2018
2019 (((
2020 (((
2021 **Package Includes**:
2022 )))
2023 )))
2024
2025 (((
2026 (((
2027 * LT-22222-L I/O Controller x 1
2028 * Stick Antenna for LoRa RF part x 1
2029 * Bracket for controller x1
2030 * Program cable x 1
2031 )))
2032 )))
2033
2034 (((
2035 (((
2036 **Dimension and weight**:
2037 )))
2038 )))
2039
2040 (((
2041 (((
2042 * Device Size: 13.5 x 7 x 3 cm
2043 * Device Weight: 105g
2044 * Package Size / pcs : 14.5 x 8 x 5 cm
2045 * Weight / pcs : 170g
2046
2047
2048 )))
2049 )))
2050
2051 (((
2052 = 9. Support =
2053 )))
2054
2055 * (((
2056 (((
2057 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.
2058 )))
2059 )))
2060 * (((
2061 (((
2062 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
2063 )))
2064 )))
2065
2066 (((
2067 (((
2068 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2069
2070
2071 )))
2072
2073 (((
2074 = 10. Reference​​​​​ =
2075
2076 * Product Page:
2077
2078 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]]
2079
2080 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2081 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2082 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2083 )))
2084 )))