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Version 77.22 by Xiaoling on 2022/06/10 08:41
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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 **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
789 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
790
791 Set work mode.
792
793 * AT Command:
794
795 (% class="box infomessage" %)
796 (((
797 **AT+MOD=N  **
798 )))
799
800 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
801
802 * Downlink Payload (prefix 0x0A):
803
804 (% class="box infomessage" %)
805 (((
806 **0x0A aa     ~/~/ Same as AT+MOD=aa**
807 )))
808
809
810
811 ==== 3.4.2.3 Poll an uplink ====
812
813 * AT Command:
814
815 There is no AT Command to poll uplink
816
817 * Downlink Payload (prefix 0x08):
818
819 (% class="box infomessage" %)
820 (((
821 **0x08 FF     ~/~/ Poll an uplink,**
822 )))
823
824 **Example**: 0x08FF, ask device to send an Uplink
825
826
827
828 ==== 3.4.2.4 Enable Trigger Mode ====
829
830 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
831
832 * AT Command:
833
834 (% class="box infomessage" %)
835 (((
836 **AT+ADDMOD6=1 or 0**
837 )))
838
839 1: Enable Trigger Mode
840
841 0: Disable Trigger Mode
842
843 * Downlink Payload (prefix 0x0A 06):
844
845 (% class="box infomessage" %)
846 (((
847 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
848 )))
849
850
851
852 ==== 3.4.2.5 Poll trigger settings ====
853
854 Poll trigger settings,
855
856 * AT Command:
857
858 There is no AT Command for this feature.
859
860 * Downlink Payload (prefix 0x AB 06):
861
862 (% class="box infomessage" %)
863 (((
864 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
865 )))
866
867
868 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
869
870 Enable Disable DI1/DI2/DI2 as trigger,
871
872 * AT Command:
873
874 (% class="box infomessage" %)
875 (((
876 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
877 )))
878
879 **Example:**
880
881 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
882
883 * Downlink Payload (prefix 0xAA 02):
884
885 (% class="box infomessage" %)
886 (((
887 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
888 )))
889
890
891 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
892
893 Set DI1 or DI3(for LT-33222-L) trigger.
894
895 * AT Command:
896
897 (% class="box infomessage" %)
898 (((
899 **AT+TRIG1=a,b**
900 )))
901
902 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
903
904 b : delay timing.
905
906 **Example:**
907
908 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
909
910 * Downlink Payload (prefix 0x09 01 ):
911
912 (% class="box infomessage" %)
913 (((
914 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
915 )))
916
917
918 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
919
920 Set DI2 trigger.
921
922 * AT Command:
923
924 (% class="box infomessage" %)
925 (((
926 **AT+TRIG2=a,b**
927 )))
928
929 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
930
931 b : delay timing.
932
933 **Example:**
934
935 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
936
937 * Downlink Payload (prefix 0x09 02 ):
938
939 (% class="box infomessage" %)
940 (((
941 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
942 )))
943
944
945 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
946
947 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
948
949 * AT Command:
950
951 (% class="box infomessage" %)
952 (((
953 **AT+ACLIM. **
954 )))
955
956 * Downlink Payload (prefix 0xAA 01 ):
957
958 (% class="box infomessage" %)
959 (((
960 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
961 )))
962
963
964 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
965
966 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
967
968 * AT Command:
969
970 (% class="box infomessage" %)
971 (((
972 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
973 )))
974
975 * Downlink Payload (prefix 0xAA 00 ):
976
977 (% class="box infomessage" %)
978 (((
979 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
980 )))
981
982
983 ==== 3.4.2.11 Trigger – Set minimum interval ====
984
985 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
986
987 * AT Command:
988
989 (% class="box infomessage" %)
990 (((
991 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
992 )))
993
994 * Downlink Payload (prefix 0xAC ):
995
996 (% class="box infomessage" %)
997 (((
998 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
999 )))
1000
1001
1002 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1003
1004 * AT Command:
1005
1006 There is no AT Command to control Digital Output
1007
1008 * Downlink Payload (prefix 0x02):
1009
1010 (% class="box infomessage" %)
1011 (((
1012 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1013 )))
1014
1015 (((
1016 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1017 )))
1018
1019 (((
1020 01: Low,  00: High ,  11: No action
1021 )))
1022
1023 [[image:image-20220524092754-5.png]]
1024
1025 (((
1026 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1027 )))
1028
1029 (((
1030 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1031 )))
1032
1033
1034 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1035
1036 * AT Command:
1037
1038 There is no AT Command to control Digital Output
1039
1040 * Downlink Payload (prefix 0xA9):
1041
1042 (% class="box infomessage" %)
1043 (((
1044 (((
1045 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1046 )))
1047 )))
1048
1049 This is to control the digital output time of DO pin. Include four bytes:
1050
1051 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1052
1053 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1054
1055 01: DO pins will change back to original state after timeout.
1056
1057 00: DO pins will change to an inverter state after timeout 
1058
1059 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1060
1061 [[image:image-20220524093238-6.png]]
1062
1063 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1064
1065 [[image:image-20220524093328-7.png]]
1066
1067 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1068
1069 [[image:image-20220524093351-8.png]]
1070
1071 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1072
1073 Latching time. Unit: ms
1074
1075 Device will upload a packet if downlink code executes successfully.
1076
1077 **Example payload:**
1078
1079 **~1. A9 01 01 01 01 07 D0**
1080
1081 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1082
1083 **2. A9 01 00 01 11 07 D0**
1084
1085 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1086
1087 **3. A9 00 00 00 00 07 D0**
1088
1089 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1090
1091 **4. A9 00 11 01 00 07 D0**
1092
1093 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
1094
1095
1096 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1097
1098 * AT Command:
1099
1100 There is no AT Command to control Relay Output
1101
1102 * Downlink Payload (prefix 0x03):
1103
1104 (% class="box infomessage" %)
1105 (((
1106 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1107 )))
1108
1109 (((
1110 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1111 )))
1112
1113 (((
1114 01: Close ,  00: Open , 11: No action
1115 )))
1116
1117 (((
1118 [[image:image-20220524093724-9.png]]
1119 )))
1120
1121 Device will upload a packet if downlink code executes successfully.
1122
1123
1124 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1125
1126 * AT Command:
1127
1128 There is no AT Command to control Relay Output
1129
1130 * Downlink Payload (prefix 0x05):
1131
1132 (% class="box infomessage" %)
1133 (((
1134 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1135 )))
1136
1137 This is to control the relay output time of relay. Include four bytes:
1138
1139 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1140
1141 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1142
1143 01: Relays will change back to original state after timeout.
1144
1145 00: Relays will change to an inverter state after timeout
1146
1147 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1148
1149 [[image:image-20220524093831-10.png]]
1150
1151 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1152
1153 Device will upload a packet if downlink code executes successfully.
1154
1155 **Example payload:**
1156
1157 **~1. 05 01 11 07 D0**
1158
1159 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1160
1161 **2. 05 01 10 07 D0**
1162
1163 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1164
1165 **3. 05 00 01 07 D0**
1166
1167 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1168
1169 **4. 05 00 00 07 D0**
1170
1171 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1172
1173
1174 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1175
1176 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1177
1178 * AT Command:
1179
1180 (% class="box infomessage" %)
1181 (((
1182 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1183 )))
1184
1185 * Downlink Payload (prefix 0xA5):
1186
1187 (% class="box infomessage" %)
1188 (((
1189 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1190 )))
1191
1192
1193 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1194
1195 * AT Command:
1196
1197 (% class="box infomessage" %)
1198 (((
1199 **AT+SETCNT=aa,(bb cc dd ee) **
1200 )))
1201
1202 aa: 1: Set count1,
1203
1204 2: Set count2,
1205
1206 3: Set AV1 count
1207
1208 Bb cc dd ee: number to be set
1209
1210 * Downlink Payload (prefix 0xA8):
1211
1212 (% class="box infomessage" %)
1213 (((
1214 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1215 )))
1216
1217
1218 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1219
1220 Clear counting for counting mode
1221
1222 * AT Command:
1223
1224 (% class="box infomessage" %)
1225 (((
1226 **AT+CLRCOUNT ~/~/ clear all counting**
1227 )))
1228
1229 * Downlink Payload (prefix 0xA6):
1230
1231 (% class="box infomessage" %)
1232 (((
1233 **0x A6 01     ~/~/ clear all counting,**
1234 )))
1235
1236
1237 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1238
1239 * AT Command:
1240
1241 (% class="box infomessage" %)
1242 (((
1243 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1244 )))
1245
1246 * Downlink Payload (prefix 0xA7):
1247
1248 (% class="box infomessage" %)
1249 (((
1250 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1251 )))
1252
1253 (((
1254 range: aa bb cc:0 to 16777215,  (unit:second)
1255
1256
1257 )))
1258
1259 == 3.5 Integrate with Mydevice ==
1260
1261 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:
1262
1263 (((
1264 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1265 )))
1266
1267 (((
1268 **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:
1269 )))
1270
1271 [[image:1653356737703-362.png||height="232" width="732"]]
1272
1273 [[image:image-20220524094641-11.png||height="390" width="723"]]
1274
1275 [[image:image-20220524094641-12.png||height="402" width="718"]]
1276
1277
1278 **Step 3**: Create an account or log in Mydevices.
1279
1280 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1281
1282 Search under The things network
1283
1284 [[image:1653356838789-523.png||height="337" width="740"]]
1285
1286
1287 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1288
1289 [[image:image-20220524094909-1.png||height="335" width="729"]]
1290
1291 [[image:image-20220524094909-2.png||height="337" width="729"]]
1292
1293 [[image:image-20220524094909-3.png||height="338" width="727"]]
1294
1295 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1296
1297 [[image:image-20220524094909-5.png||height="341" width="734"]]
1298
1299
1300 == 3.6 Interface Detail ==
1301
1302 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1303
1304 Support NPN Type sensor
1305
1306 [[image:1653356991268-289.png]]
1307
1308
1309 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1310
1311 (((
1312 The DI port of LT-22222-L can support NPN or PNP output sensor.
1313 )))
1314
1315 (((
1316 (((
1317 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
1318 )))
1319 )))
1320
1321 [[image:1653357170703-587.png]]
1322
1323 (((
1324 (((
1325 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1326 )))
1327 )))
1328
1329 (((
1330
1331 )))
1332
1333 (((
1334 **Example1**: Connect to a Low active sensor.
1335 )))
1336
1337 (((
1338 This type of sensor will output a low signal GND when active.
1339 )))
1340
1341 * (((
1342 Connect sensor’s output to DI1-
1343 )))
1344 * (((
1345 Connect sensor’s VCC to DI1+.
1346 )))
1347
1348 (((
1349 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1350 )))
1351
1352 (((
1353 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1354 )))
1355
1356 (((
1357 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.
1358 )))
1359
1360 (((
1361
1362 )))
1363
1364 (((
1365 **Example2**: Connect to a High active sensor.
1366 )))
1367
1368 (((
1369 This type of sensor will output a high signal (example 24v) when active.
1370 )))
1371
1372 * (((
1373 Connect sensor’s output to DI1+
1374 )))
1375 * (((
1376 Connect sensor’s GND DI1-.
1377 )))
1378
1379 (((
1380 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1381 )))
1382
1383 (((
1384 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1385 )))
1386
1387 (((
1388 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.
1389 )))
1390
1391 (((
1392
1393 )))
1394
1395 (((
1396 **Example3**: Connect to a 220v high active sensor.
1397 )))
1398
1399 (((
1400 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1401 )))
1402
1403 * (((
1404 Connect sensor’s output to DI1+ with a serial 50K resistor
1405 )))
1406 * (((
1407 Connect sensor’s GND DI1-.
1408 )))
1409
1410 (((
1411 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1412 )))
1413
1414 (((
1415 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1416 )))
1417
1418 (((
1419 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.
1420 )))
1421
1422
1423 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1424
1425 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1426
1427 [[image:1653357531600-905.png]]
1428
1429
1430 === 3.6.4 Analog Input Interface ===
1431
1432 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:
1433
1434 **AC2 = (IN2 voltage )/12**
1435
1436 [[image:1653357592296-182.png]]
1437
1438 Example to connect a 4~~20mA sensor
1439
1440 We take the wind speed sensor as an example for reference only.
1441
1442 Specifications of the wind speed sensor:
1443
1444 Red:12~~24v
1445
1446 Yellow:4~~20mA
1447
1448 Black:GND
1449
1450
1451 Connection diagram:
1452
1453 [[image:1653357640609-758.png]]
1454
1455 [[image:1653357648330-671.png||height="155" width="733"]]
1456
1457
1458 === 3.6.5 Relay Output ===
1459
1460 (((
1461 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:
1462 )))
1463
1464 [[image:image-20220524100215-9.png]]
1465
1466 [[image:image-20220524100215-10.png||height="382" width="723"]]
1467
1468
1469 == 3.7 LEDs Indicators ==
1470
1471 [[image:image-20220524100748-11.png]]
1472
1473
1474 = 4. Use AT Command =
1475
1476 == 4.1 Access AT Command ==
1477
1478 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.
1479
1480 [[image:1653358238933-385.png]]
1481
1482 (((
1483 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:
1484 )))
1485
1486 [[image:1653358355238-883.png]]
1487
1488 (((
1489 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/]]
1490 )))
1491
1492 (((
1493 AT+<CMD>?        : Help on <CMD>
1494 )))
1495
1496 (((
1497 AT+<CMD>         : Run <CMD>
1498 )))
1499
1500 (((
1501 AT+<CMD>=<value> : Set the value
1502 )))
1503
1504 (((
1505 AT+<CMD>=?       : Get the value
1506 )))
1507
1508 (((
1509 ATZ: Trig a reset of the MCU
1510 )))
1511
1512 (((
1513 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1514 )))
1515
1516 (((
1517 AT+DEUI: Get or Set the Device EUI
1518 )))
1519
1520 (((
1521 AT+DADDR: Get or Set the Device Address
1522 )))
1523
1524 (((
1525 AT+APPKEY: Get or Set the Application Key
1526 )))
1527
1528 (((
1529 AT+NWKSKEY: Get or Set the Network Session Key
1530 )))
1531
1532 (((
1533 AT+APPSKEY: Get or Set the Application Session Key
1534 )))
1535
1536 (((
1537 AT+APPEUI: Get or Set the Application EUI
1538 )))
1539
1540 (((
1541 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1542 )))
1543
1544 (((
1545 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1546 )))
1547
1548 (((
1549 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1550 )))
1551
1552 (((
1553 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1554 )))
1555
1556 (((
1557 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1558 )))
1559
1560 (((
1561 AT+RX2FQ: Get or Set the Rx2 window frequency
1562 )))
1563
1564 (((
1565 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1566 )))
1567
1568 (((
1569 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1570 )))
1571
1572 (((
1573 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1574 )))
1575
1576 (((
1577 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1578 )))
1579
1580 (((
1581 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1582 )))
1583
1584 (((
1585 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1586 )))
1587
1588 (((
1589 AT+NWKID: Get or Set the Network ID
1590 )))
1591
1592 (((
1593 AT+FCU: Get or Set the Frame Counter Uplink
1594 )))
1595
1596 (((
1597 AT+FCD: Get or Set the Frame Counter Downlink
1598 )))
1599
1600 (((
1601 AT+CLASS: Get or Set the Device Class
1602 )))
1603
1604 (((
1605 AT+JOIN: Join network
1606 )))
1607
1608 (((
1609 AT+NJS: Get OTAA Join Status
1610 )))
1611
1612 (((
1613 AT+SENDB: Send hexadecimal data along with the application port
1614 )))
1615
1616 (((
1617 AT+SEND: Send text data along with the application port
1618 )))
1619
1620 (((
1621 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1622 )))
1623
1624 (((
1625 AT+RECV: Print last received data in raw format
1626 )))
1627
1628 (((
1629 AT+VER: Get current image version and Frequency Band
1630 )))
1631
1632 (((
1633 AT+CFM: Get or Set the confirmation mode (0-1)
1634 )))
1635
1636 (((
1637 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1638 )))
1639
1640 (((
1641 AT+SNR: Get the SNR of the last received packet
1642 )))
1643
1644 (((
1645 AT+RSSI: Get the RSSI of the last received packet
1646 )))
1647
1648 (((
1649 AT+TDC: Get or set the application data transmission interval in ms
1650 )))
1651
1652 (((
1653 AT+PORT: Get or set the application port
1654 )))
1655
1656 (((
1657 AT+DISAT: Disable AT commands
1658 )))
1659
1660 (((
1661 AT+PWORD: Set password, max 9 digits
1662 )))
1663
1664 (((
1665 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1666 )))
1667
1668 (((
1669 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1670 )))
1671
1672 (((
1673 AT+CFG: Print all settings
1674
1675
1676 )))
1677
1678 == 4.2 Common AT Command Sequence ==
1679
1680 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1681
1682 (((
1683 If device has not joined network yet:
1684 )))
1685
1686 (((
1687 (% style="background-color:#dcdcdc" %)123456
1688 )))
1689
1690 (((
1691 (% style="background-color:#dcdcdc" %)AT+FDR
1692 )))
1693
1694 (((
1695 (% style="background-color:#dcdcdc" %)123456
1696 )))
1697
1698 (((
1699 (% style="background-color:#dcdcdc" %)AT+NJM=0
1700 )))
1701
1702 (((
1703 (% style="background-color:#dcdcdc" %)ATZ
1704 )))
1705
1706
1707 (((
1708 If device already joined network:
1709 )))
1710
1711 (((
1712 (% style="background-color:#dcdcdc" %)AT+NJM=0
1713 )))
1714
1715 (((
1716 (% style="background-color:#dcdcdc" %)ATZ
1717
1718
1719 )))
1720
1721 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1722
1723 (((
1724 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1725 )))
1726
1727 (((
1728 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1729 )))
1730
1731 (((
1732 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1733 )))
1734
1735 (((
1736 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1737 )))
1738
1739 (((
1740 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1741 )))
1742
1743 (((
1744 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1745 )))
1746
1747 (((
1748 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1749 )))
1750
1751 (((
1752 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1753 )))
1754
1755 (((
1756 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1757 )))
1758
1759 (((
1760 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1761 )))
1762
1763 (((
1764 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1765 )))
1766
1767 (((
1768 (% 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.
1769 )))
1770
1771 (((
1772 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1773 )))
1774
1775 (((
1776 (% style="color:red" %)**Note:**
1777 )))
1778
1779 (((
1780 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1781 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1782 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.
1783 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
1784 )))
1785
1786 (((
1787 [[image:1653359097980-169.png||height="188" width="729"]]
1788 )))
1789
1790 (((
1791
1792 )))
1793
1794 === 4.2.3 Change to Class A ===
1795
1796 If sensor JOINED
1797 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1798 ATZ
1799
1800
1801 = 5. FAQ =
1802
1803 == 5.1 How to upgrade the image? ==
1804
1805 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1806
1807 * Support new features
1808 * For bug fix
1809 * Change LoRaWAN bands.
1810 Below shows the hardware connection for how to upload an image to the LT:
1811 * [[image:1653359603330-121.png]]
1812
1813 (((
1814 **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]].
1815 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1816 **Step3: **Open flashloader; choose the correct COM port to update.
1817 **For LT-22222-L**:
1818 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.
1819 )))
1820
1821 [[image:image-20220524103407-12.png]]
1822
1823 [[image:image-20220524103429-13.png]]
1824
1825 [[image:image-20220524104033-15.png]]
1826
1827 (% 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:
1828
1829 [[image:1653360054704-518.png||height="186" width="745"]]
1830
1831
1832 (((
1833 (((
1834 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1835 )))
1836 )))
1837
1838 (((
1839 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1840
1841
1842 )))
1843
1844 (((
1845 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1846 )))
1847
1848 (((
1849 (((
1850 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1851 )))
1852 )))
1853
1854 (((
1855 (((
1856 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1857 )))
1858 )))
1859
1860 (((
1861 (% 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.
1862 )))
1863
1864 (((
1865 [[image:1653360231087-571.png||height="401" width="727"]]
1866 )))
1867
1868 (((
1869 (% 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.
1870 )))
1871
1872 (((
1873 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1874 )))
1875
1876 (((
1877 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1878 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1879 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1880 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1881 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1882 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1883 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1884 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1885 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1886 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1887 )))
1888
1889 (((
1890 As shown in below:
1891 )))
1892
1893 [[image:1653360498588-932.png||height="485" width="726"]]
1894
1895
1896 == 5.4 Can I see counting event in Serial? ==
1897
1898 (((
1899 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.
1900
1901
1902 == 5.5 Can i use point to point communication for LT-22222-L? ==
1903
1904 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1905
1906
1907 )))
1908
1909 (((
1910 = 6. Trouble Shooting =
1911 )))
1912
1913 (((
1914 (((
1915 == 6.1 Downlink doesn’t work, how to solve it? ==
1916 )))
1917 )))
1918
1919 (((
1920 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1921
1922
1923 )))
1924
1925 (((
1926 == 6.2 Have trouble to upload image. ==
1927 )))
1928
1929 (((
1930 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1931 )))
1932
1933 (((
1934
1935 )))
1936
1937 (((
1938 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1939 )))
1940
1941 (((
1942 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1943 )))
1944
1945 (((
1946
1947 )))
1948
1949 (((
1950 = 7. Order Info =
1951 )))
1952
1953 (((
1954 (((
1955 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1956 )))
1957 )))
1958
1959 (((
1960 (((
1961 (% style="color:#4f81bd" %)**XXX:**
1962 )))
1963 )))
1964
1965 (((
1966 * (((
1967 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1968 )))
1969 )))
1970
1971 (((
1972 * (((
1973 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1974 )))
1975 )))
1976
1977 (((
1978 * (((
1979 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1980 )))
1981 )))
1982
1983 (((
1984 * (((
1985 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1986 )))
1987 )))
1988
1989 (((
1990 * (((
1991 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1992 )))
1993 )))
1994
1995 (((
1996 * (((
1997 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1998 )))
1999 )))
2000
2001 (((
2002 * (((
2003 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2004 )))
2005 )))
2006
2007 (((
2008 * (((
2009 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2010 )))
2011 )))
2012
2013 (((
2014 * (((
2015 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2016
2017
2018 )))
2019
2020 = 8. Packing Info =
2021 )))
2022
2023 (((
2024 (((
2025 **Package Includes**:
2026 )))
2027 )))
2028
2029 (((
2030 (((
2031 * LT-22222-L I/O Controller x 1
2032 * Stick Antenna for LoRa RF part x 1
2033 * Bracket for controller x1
2034 * Program cable x 1
2035 )))
2036 )))
2037
2038 (((
2039 (((
2040 **Dimension and weight**:
2041 )))
2042 )))
2043
2044 (((
2045 (((
2046 * Device Size: 13.5 x 7 x 3 cm
2047 * Device Weight: 105g
2048 * Package Size / pcs : 14.5 x 8 x 5 cm
2049 * Weight / pcs : 170g
2050
2051
2052 )))
2053 )))
2054
2055 (((
2056 = 9. Support =
2057 )))
2058
2059 * (((
2060 (((
2061 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.
2062 )))
2063 )))
2064 * (((
2065 (((
2066 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
2067 )))
2068 )))
2069
2070 (((
2071 (((
2072 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2073
2074
2075 )))
2076
2077 (((
2078 = 10. Reference​​​​​ =
2079
2080 * Product Page:
2081
2082 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]]
2083
2084 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2085 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2086 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2087 )))
2088 )))