Version 77.26 by Xiaoling on 2022/06/10 08:41
Show last authors
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
869 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
870
871 Enable Disable DI1/DI2/DI2 as trigger,
872
873 * AT Command:
874
875 (% class="box infomessage" %)
876 (((
877 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
878 )))
879
880 **Example:**
881
882 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
883
884 * Downlink Payload (prefix 0xAA 02):
885
886 (% class="box infomessage" %)
887 (((
888 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
889 )))
890
891
892
893 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
894
895 Set DI1 or DI3(for LT-33222-L) trigger.
896
897 * AT Command:
898
899 (% class="box infomessage" %)
900 (((
901 **AT+TRIG1=a,b**
902 )))
903
904 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
905
906 b : delay timing.
907
908 **Example:**
909
910 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
911
912 * Downlink Payload (prefix 0x09 01 ):
913
914 (% class="box infomessage" %)
915 (((
916 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
917 )))
918
919
920
921 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
922
923 Set DI2 trigger.
924
925 * AT Command:
926
927 (% class="box infomessage" %)
928 (((
929 **AT+TRIG2=a,b**
930 )))
931
932 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
933
934 b : delay timing.
935
936 **Example:**
937
938 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
939
940 * Downlink Payload (prefix 0x09 02 ):
941
942 (% class="box infomessage" %)
943 (((
944 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
945 )))
946
947
948
949 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
950
951 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
952
953 * AT Command:
954
955 (% class="box infomessage" %)
956 (((
957 **AT+ACLIM. **
958 )))
959
960 * Downlink Payload (prefix 0xAA 01 ):
961
962 (% class="box infomessage" %)
963 (((
964 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
965 )))
966
967
968 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
969
970 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
971
972 * AT Command:
973
974 (% class="box infomessage" %)
975 (((
976 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
977 )))
978
979 * Downlink Payload (prefix 0xAA 00 ):
980
981 (% class="box infomessage" %)
982 (((
983 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
984 )))
985
986
987 ==== 3.4.2.11 Trigger – Set minimum interval ====
988
989 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
990
991 * AT Command:
992
993 (% class="box infomessage" %)
994 (((
995 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
996 )))
997
998 * Downlink Payload (prefix 0xAC ):
999
1000 (% class="box infomessage" %)
1001 (((
1002 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1003 )))
1004
1005
1006 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1007
1008 * AT Command:
1009
1010 There is no AT Command to control Digital Output
1011
1012 * Downlink Payload (prefix 0x02):
1013
1014 (% class="box infomessage" %)
1015 (((
1016 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1017 )))
1018
1019 (((
1020 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1021 )))
1022
1023 (((
1024 01: Low,  00: High ,  11: No action
1025 )))
1026
1027 [[image:image-20220524092754-5.png]]
1028
1029 (((
1030 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1031 )))
1032
1033 (((
1034 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1035 )))
1036
1037
1038 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1039
1040 * AT Command:
1041
1042 There is no AT Command to control Digital Output
1043
1044 * Downlink Payload (prefix 0xA9):
1045
1046 (% class="box infomessage" %)
1047 (((
1048 (((
1049 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1050 )))
1051 )))
1052
1053 This is to control the digital output time of DO pin. Include four bytes:
1054
1055 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1056
1057 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1058
1059 01: DO pins will change back to original state after timeout.
1060
1061 00: DO pins will change to an inverter state after timeout 
1062
1063 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1064
1065 [[image:image-20220524093238-6.png]]
1066
1067 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1068
1069 [[image:image-20220524093328-7.png]]
1070
1071 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1072
1073 [[image:image-20220524093351-8.png]]
1074
1075 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1076
1077 Latching time. Unit: ms
1078
1079 Device will upload a packet if downlink code executes successfully.
1080
1081 **Example payload:**
1082
1083 **~1. A9 01 01 01 01 07 D0**
1084
1085 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1086
1087 **2. A9 01 00 01 11 07 D0**
1088
1089 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1090
1091 **3. A9 00 00 00 00 07 D0**
1092
1093 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1094
1095 **4. A9 00 11 01 00 07 D0**
1096
1097 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
1098
1099
1100 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1101
1102 * AT Command:
1103
1104 There is no AT Command to control Relay Output
1105
1106 * Downlink Payload (prefix 0x03):
1107
1108 (% class="box infomessage" %)
1109 (((
1110 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1111 )))
1112
1113 (((
1114 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1115 )))
1116
1117 (((
1118 01: Close ,  00: Open , 11: No action
1119 )))
1120
1121 (((
1122 [[image:image-20220524093724-9.png]]
1123 )))
1124
1125 Device will upload a packet if downlink code executes successfully.
1126
1127
1128 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1129
1130 * AT Command:
1131
1132 There is no AT Command to control Relay Output
1133
1134 * Downlink Payload (prefix 0x05):
1135
1136 (% class="box infomessage" %)
1137 (((
1138 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1139 )))
1140
1141 This is to control the relay output time of relay. Include four bytes:
1142
1143 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1144
1145 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1146
1147 01: Relays will change back to original state after timeout.
1148
1149 00: Relays will change to an inverter state after timeout
1150
1151 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1152
1153 [[image:image-20220524093831-10.png]]
1154
1155 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1156
1157 Device will upload a packet if downlink code executes successfully.
1158
1159 **Example payload:**
1160
1161 **~1. 05 01 11 07 D0**
1162
1163 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1164
1165 **2. 05 01 10 07 D0**
1166
1167 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1168
1169 **3. 05 00 01 07 D0**
1170
1171 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1172
1173 **4. 05 00 00 07 D0**
1174
1175 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1176
1177
1178 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1179
1180 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1181
1182 * AT Command:
1183
1184 (% class="box infomessage" %)
1185 (((
1186 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1187 )))
1188
1189 * Downlink Payload (prefix 0xA5):
1190
1191 (% class="box infomessage" %)
1192 (((
1193 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1194 )))
1195
1196
1197 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1198
1199 * AT Command:
1200
1201 (% class="box infomessage" %)
1202 (((
1203 **AT+SETCNT=aa,(bb cc dd ee) **
1204 )))
1205
1206 aa: 1: Set count1,
1207
1208 2: Set count2,
1209
1210 3: Set AV1 count
1211
1212 Bb cc dd ee: number to be set
1213
1214 * Downlink Payload (prefix 0xA8):
1215
1216 (% class="box infomessage" %)
1217 (((
1218 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1219 )))
1220
1221
1222 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1223
1224 Clear counting for counting mode
1225
1226 * AT Command:
1227
1228 (% class="box infomessage" %)
1229 (((
1230 **AT+CLRCOUNT ~/~/ clear all counting**
1231 )))
1232
1233 * Downlink Payload (prefix 0xA6):
1234
1235 (% class="box infomessage" %)
1236 (((
1237 **0x A6 01     ~/~/ clear all counting,**
1238 )))
1239
1240
1241 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1242
1243 * AT Command:
1244
1245 (% class="box infomessage" %)
1246 (((
1247 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1248 )))
1249
1250 * Downlink Payload (prefix 0xA7):
1251
1252 (% class="box infomessage" %)
1253 (((
1254 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1255 )))
1256
1257 (((
1258 range: aa bb cc:0 to 16777215,  (unit:second)
1259
1260
1261 )))
1262
1263 == 3.5 Integrate with Mydevice ==
1264
1265 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:
1266
1267 (((
1268 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1269 )))
1270
1271 (((
1272 **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:
1273 )))
1274
1275 [[image:1653356737703-362.png||height="232" width="732"]]
1276
1277 [[image:image-20220524094641-11.png||height="390" width="723"]]
1278
1279 [[image:image-20220524094641-12.png||height="402" width="718"]]
1280
1281
1282 **Step 3**: Create an account or log in Mydevices.
1283
1284 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1285
1286 Search under The things network
1287
1288 [[image:1653356838789-523.png||height="337" width="740"]]
1289
1290
1291 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1292
1293 [[image:image-20220524094909-1.png||height="335" width="729"]]
1294
1295 [[image:image-20220524094909-2.png||height="337" width="729"]]
1296
1297 [[image:image-20220524094909-3.png||height="338" width="727"]]
1298
1299 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1300
1301 [[image:image-20220524094909-5.png||height="341" width="734"]]
1302
1303
1304 == 3.6 Interface Detail ==
1305
1306 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1307
1308 Support NPN Type sensor
1309
1310 [[image:1653356991268-289.png]]
1311
1312
1313 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1314
1315 (((
1316 The DI port of LT-22222-L can support NPN or PNP output sensor.
1317 )))
1318
1319 (((
1320 (((
1321 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
1322 )))
1323 )))
1324
1325 [[image:1653357170703-587.png]]
1326
1327 (((
1328 (((
1329 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1330 )))
1331 )))
1332
1333 (((
1334
1335 )))
1336
1337 (((
1338 **Example1**: Connect to a Low active sensor.
1339 )))
1340
1341 (((
1342 This type of sensor will output a low signal GND when active.
1343 )))
1344
1345 * (((
1346 Connect sensor’s output to DI1-
1347 )))
1348 * (((
1349 Connect sensor’s VCC to DI1+.
1350 )))
1351
1352 (((
1353 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1354 )))
1355
1356 (((
1357 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1358 )))
1359
1360 (((
1361 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.
1362 )))
1363
1364 (((
1365
1366 )))
1367
1368 (((
1369 **Example2**: Connect to a High active sensor.
1370 )))
1371
1372 (((
1373 This type of sensor will output a high signal (example 24v) when active.
1374 )))
1375
1376 * (((
1377 Connect sensor’s output to DI1+
1378 )))
1379 * (((
1380 Connect sensor’s GND DI1-.
1381 )))
1382
1383 (((
1384 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1385 )))
1386
1387 (((
1388 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1389 )))
1390
1391 (((
1392 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.
1393 )))
1394
1395 (((
1396
1397 )))
1398
1399 (((
1400 **Example3**: Connect to a 220v high active sensor.
1401 )))
1402
1403 (((
1404 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1405 )))
1406
1407 * (((
1408 Connect sensor’s output to DI1+ with a serial 50K resistor
1409 )))
1410 * (((
1411 Connect sensor’s GND DI1-.
1412 )))
1413
1414 (((
1415 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1416 )))
1417
1418 (((
1419 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1420 )))
1421
1422 (((
1423 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.
1424 )))
1425
1426
1427 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1428
1429 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1430
1431 [[image:1653357531600-905.png]]
1432
1433
1434 === 3.6.4 Analog Input Interface ===
1435
1436 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:
1437
1438 **AC2 = (IN2 voltage )/12**
1439
1440 [[image:1653357592296-182.png]]
1441
1442 Example to connect a 4~~20mA sensor
1443
1444 We take the wind speed sensor as an example for reference only.
1445
1446 Specifications of the wind speed sensor:
1447
1448 Red:12~~24v
1449
1450 Yellow:4~~20mA
1451
1452 Black:GND
1453
1454
1455 Connection diagram:
1456
1457 [[image:1653357640609-758.png]]
1458
1459 [[image:1653357648330-671.png||height="155" width="733"]]
1460
1461
1462 === 3.6.5 Relay Output ===
1463
1464 (((
1465 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:
1466 )))
1467
1468 [[image:image-20220524100215-9.png]]
1469
1470 [[image:image-20220524100215-10.png||height="382" width="723"]]
1471
1472
1473 == 3.7 LEDs Indicators ==
1474
1475 [[image:image-20220524100748-11.png]]
1476
1477
1478 = 4. Use AT Command =
1479
1480 == 4.1 Access AT Command ==
1481
1482 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.
1483
1484 [[image:1653358238933-385.png]]
1485
1486 (((
1487 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:
1488 )))
1489
1490 [[image:1653358355238-883.png]]
1491
1492 (((
1493 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/]]
1494 )))
1495
1496 (((
1497 AT+<CMD>?        : Help on <CMD>
1498 )))
1499
1500 (((
1501 AT+<CMD>         : Run <CMD>
1502 )))
1503
1504 (((
1505 AT+<CMD>=<value> : Set the value
1506 )))
1507
1508 (((
1509 AT+<CMD>=?       : Get the value
1510 )))
1511
1512 (((
1513 ATZ: Trig a reset of the MCU
1514 )))
1515
1516 (((
1517 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1518 )))
1519
1520 (((
1521 AT+DEUI: Get or Set the Device EUI
1522 )))
1523
1524 (((
1525 AT+DADDR: Get or Set the Device Address
1526 )))
1527
1528 (((
1529 AT+APPKEY: Get or Set the Application Key
1530 )))
1531
1532 (((
1533 AT+NWKSKEY: Get or Set the Network Session Key
1534 )))
1535
1536 (((
1537 AT+APPSKEY: Get or Set the Application Session Key
1538 )))
1539
1540 (((
1541 AT+APPEUI: Get or Set the Application EUI
1542 )))
1543
1544 (((
1545 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1546 )))
1547
1548 (((
1549 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1550 )))
1551
1552 (((
1553 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1554 )))
1555
1556 (((
1557 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1558 )))
1559
1560 (((
1561 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1562 )))
1563
1564 (((
1565 AT+RX2FQ: Get or Set the Rx2 window frequency
1566 )))
1567
1568 (((
1569 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1570 )))
1571
1572 (((
1573 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1574 )))
1575
1576 (((
1577 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1578 )))
1579
1580 (((
1581 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1582 )))
1583
1584 (((
1585 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1586 )))
1587
1588 (((
1589 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1590 )))
1591
1592 (((
1593 AT+NWKID: Get or Set the Network ID
1594 )))
1595
1596 (((
1597 AT+FCU: Get or Set the Frame Counter Uplink
1598 )))
1599
1600 (((
1601 AT+FCD: Get or Set the Frame Counter Downlink
1602 )))
1603
1604 (((
1605 AT+CLASS: Get or Set the Device Class
1606 )))
1607
1608 (((
1609 AT+JOIN: Join network
1610 )))
1611
1612 (((
1613 AT+NJS: Get OTAA Join Status
1614 )))
1615
1616 (((
1617 AT+SENDB: Send hexadecimal data along with the application port
1618 )))
1619
1620 (((
1621 AT+SEND: Send text data along with the application port
1622 )))
1623
1624 (((
1625 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1626 )))
1627
1628 (((
1629 AT+RECV: Print last received data in raw format
1630 )))
1631
1632 (((
1633 AT+VER: Get current image version and Frequency Band
1634 )))
1635
1636 (((
1637 AT+CFM: Get or Set the confirmation mode (0-1)
1638 )))
1639
1640 (((
1641 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1642 )))
1643
1644 (((
1645 AT+SNR: Get the SNR of the last received packet
1646 )))
1647
1648 (((
1649 AT+RSSI: Get the RSSI of the last received packet
1650 )))
1651
1652 (((
1653 AT+TDC: Get or set the application data transmission interval in ms
1654 )))
1655
1656 (((
1657 AT+PORT: Get or set the application port
1658 )))
1659
1660 (((
1661 AT+DISAT: Disable AT commands
1662 )))
1663
1664 (((
1665 AT+PWORD: Set password, max 9 digits
1666 )))
1667
1668 (((
1669 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1670 )))
1671
1672 (((
1673 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1674 )))
1675
1676 (((
1677 AT+CFG: Print all settings
1678
1679
1680 )))
1681
1682 == 4.2 Common AT Command Sequence ==
1683
1684 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1685
1686 (((
1687 If device has not joined network yet:
1688 )))
1689
1690 (((
1691 (% style="background-color:#dcdcdc" %)123456
1692 )))
1693
1694 (((
1695 (% style="background-color:#dcdcdc" %)AT+FDR
1696 )))
1697
1698 (((
1699 (% style="background-color:#dcdcdc" %)123456
1700 )))
1701
1702 (((
1703 (% style="background-color:#dcdcdc" %)AT+NJM=0
1704 )))
1705
1706 (((
1707 (% style="background-color:#dcdcdc" %)ATZ
1708 )))
1709
1710
1711 (((
1712 If device already joined network:
1713 )))
1714
1715 (((
1716 (% style="background-color:#dcdcdc" %)AT+NJM=0
1717 )))
1718
1719 (((
1720 (% style="background-color:#dcdcdc" %)ATZ
1721
1722
1723 )))
1724
1725 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1726
1727 (((
1728 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1729 )))
1730
1731 (((
1732 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1733 )))
1734
1735 (((
1736 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1737 )))
1738
1739 (((
1740 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1741 )))
1742
1743 (((
1744 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1745 )))
1746
1747 (((
1748 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1749 )))
1750
1751 (((
1752 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1753 )))
1754
1755 (((
1756 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1757 )))
1758
1759 (((
1760 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1761 )))
1762
1763 (((
1764 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1765 )))
1766
1767 (((
1768 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1769 )))
1770
1771 (((
1772 (% 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.
1773 )))
1774
1775 (((
1776 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1777 )))
1778
1779 (((
1780 (% style="color:red" %)**Note:**
1781 )))
1782
1783 (((
1784 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1785 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1786 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.
1787 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
1788 )))
1789
1790 (((
1791 [[image:1653359097980-169.png||height="188" width="729"]]
1792 )))
1793
1794 (((
1795
1796 )))
1797
1798 === 4.2.3 Change to Class A ===
1799
1800 If sensor JOINED
1801 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1802 ATZ
1803
1804
1805 = 5. FAQ =
1806
1807 == 5.1 How to upgrade the image? ==
1808
1809 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1810
1811 * Support new features
1812 * For bug fix
1813 * Change LoRaWAN bands.
1814 Below shows the hardware connection for how to upload an image to the LT:
1815 * [[image:1653359603330-121.png]]
1816
1817 (((
1818 **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]].
1819 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1820 **Step3: **Open flashloader; choose the correct COM port to update.
1821 **For LT-22222-L**:
1822 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.
1823 )))
1824
1825 [[image:image-20220524103407-12.png]]
1826
1827 [[image:image-20220524103429-13.png]]
1828
1829 [[image:image-20220524104033-15.png]]
1830
1831 (% 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:
1832
1833 [[image:1653360054704-518.png||height="186" width="745"]]
1834
1835
1836 (((
1837 (((
1838 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1839 )))
1840 )))
1841
1842 (((
1843 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1844
1845
1846 )))
1847
1848 (((
1849 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1850 )))
1851
1852 (((
1853 (((
1854 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1855 )))
1856 )))
1857
1858 (((
1859 (((
1860 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1861 )))
1862 )))
1863
1864 (((
1865 (% 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.
1866 )))
1867
1868 (((
1869 [[image:1653360231087-571.png||height="401" width="727"]]
1870 )))
1871
1872 (((
1873 (% 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.
1874 )))
1875
1876 (((
1877 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1878 )))
1879
1880 (((
1881 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1882 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1883 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1884 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1885 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1886 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1887 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1888 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1889 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1890 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1891 )))
1892
1893 (((
1894 As shown in below:
1895 )))
1896
1897 [[image:1653360498588-932.png||height="485" width="726"]]
1898
1899
1900 == 5.4 Can I see counting event in Serial? ==
1901
1902 (((
1903 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.
1904
1905
1906 == 5.5 Can i use point to point communication for LT-22222-L? ==
1907
1908 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1909
1910
1911 )))
1912
1913 (((
1914 = 6. Trouble Shooting =
1915 )))
1916
1917 (((
1918 (((
1919 == 6.1 Downlink doesn’t work, how to solve it? ==
1920 )))
1921 )))
1922
1923 (((
1924 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1925
1926
1927 )))
1928
1929 (((
1930 == 6.2 Have trouble to upload image. ==
1931 )))
1932
1933 (((
1934 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1935 )))
1936
1937 (((
1938
1939 )))
1940
1941 (((
1942 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1943 )))
1944
1945 (((
1946 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1947 )))
1948
1949 (((
1950
1951 )))
1952
1953 (((
1954 = 7. Order Info =
1955 )))
1956
1957 (((
1958 (((
1959 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1960 )))
1961 )))
1962
1963 (((
1964 (((
1965 (% style="color:#4f81bd" %)**XXX:**
1966 )))
1967 )))
1968
1969 (((
1970 * (((
1971 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1972 )))
1973 )))
1974
1975 (((
1976 * (((
1977 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1978 )))
1979 )))
1980
1981 (((
1982 * (((
1983 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1984 )))
1985 )))
1986
1987 (((
1988 * (((
1989 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1990 )))
1991 )))
1992
1993 (((
1994 * (((
1995 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1996 )))
1997 )))
1998
1999 (((
2000 * (((
2001 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2002 )))
2003 )))
2004
2005 (((
2006 * (((
2007 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2008 )))
2009 )))
2010
2011 (((
2012 * (((
2013 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2014 )))
2015 )))
2016
2017 (((
2018 * (((
2019 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2020
2021
2022 )))
2023
2024 = 8. Packing Info =
2025 )))
2026
2027 (((
2028 (((
2029 **Package Includes**:
2030 )))
2031 )))
2032
2033 (((
2034 (((
2035 * LT-22222-L I/O Controller x 1
2036 * Stick Antenna for LoRa RF part x 1
2037 * Bracket for controller x1
2038 * Program cable x 1
2039 )))
2040 )))
2041
2042 (((
2043 (((
2044 **Dimension and weight**:
2045 )))
2046 )))
2047
2048 (((
2049 (((
2050 * Device Size: 13.5 x 7 x 3 cm
2051 * Device Weight: 105g
2052 * Package Size / pcs : 14.5 x 8 x 5 cm
2053 * Weight / pcs : 170g
2054
2055
2056 )))
2057 )))
2058
2059 (((
2060 = 9. Support =
2061 )))
2062
2063 * (((
2064 (((
2065 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.
2066 )))
2067 )))
2068 * (((
2069 (((
2070 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
2071 )))
2072 )))
2073
2074 (((
2075 (((
2076 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2077
2078
2079 )))
2080
2081 (((
2082 = 10. Reference​​​​​ =
2083
2084 * Product Page:
2085
2086 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]]
2087
2088 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2089 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2090 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2091 )))
2092 )))

Applications

Navigation

Copyright ©2010-2024 Dragino Technology Co., LTD. All rights reserved
Dragino Wiki v2.0