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Version 77.83 by Xiaoling on 2022/06/10 09:26
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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 **Interface for Model: LT22222-L:**
80 )))
81
82 * (((
83 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
84 )))
85 * (((
86 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
87 )))
88 * (((
89 2 x Relay Output (5A@250VAC / 30VDC)
90 )))
91 * (((
92 2 x 0~~20mA Analog Input (res:0.01mA)
93 )))
94 * (((
95 2 x 0~~30V Analog Input (res:0.01v)
96 )))
97 * (((
98 Power Input 7~~ 24V DC. 
99 )))
100
101 (((
102 **LoRa Spec:**
103 )))
104
105 * (((
106 (((
107 Frequency Range:
108 )))
109
110 * (((
111 Band 1 (HF): 862 ~~ 1020 Mhz
112 )))
113 * (((
114 Band 2 (LF): 410 ~~ 528 Mhz
115 )))
116 )))
117 * (((
118 168 dB maximum link budget.
119 )))
120 * (((
121 +20 dBm - 100 mW constant RF output vs.
122 )))
123 * (((
124 +14 dBm high efficiency PA.
125 )))
126 * (((
127 Programmable bit rate up to 300 kbps.
128 )))
129 * (((
130 High sensitivity: down to -148 dBm.
131 )))
132 * (((
133 Bullet-proof front end: IIP3 = -12.5 dBm.
134 )))
135 * (((
136 Excellent blocking immunity.
137 )))
138 * (((
139 Low RX current of 10.3 mA, 200 nA register retention.
140 )))
141 * (((
142 Fully integrated synthesizer with a resolution of 61 Hz.
143 )))
144 * (((
145 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
146 )))
147 * (((
148 Built-in bit synchronizer for clock recovery.
149 )))
150 * (((
151 Preamble detection.
152 )))
153 * (((
154 127 dB Dynamic Range RSSI.
155 )))
156 * (((
157 Automatic RF Sense and CAD with ultra-fast AFC.
158 )))
159 * (((
160 Packet engine up to 256 bytes with CRC.
161
162
163 )))
164
165 == 1.3 Features ==
166
167 * LoRaWAN Class A & Class C protocol
168 * Optional Customized LoRa Protocol
169 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
170 * AT Commands to change parameters
171 * Remote configure parameters via LoRa Downlink
172 * Firmware upgradable via program port
173 * Counting
174
175 == 1.4  Applications ==
176
177 * Smart Buildings & Home Automation
178 * Logistics and Supply Chain Management
179 * Smart Metering
180 * Smart Agriculture
181 * Smart Cities
182 * Smart Factory
183
184 == 1.5 Hardware Variants ==
185
186 (% border="1" style="background-color:#f7faff; width:500px" %)
187 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
188 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
189 * 2 x Digital Input (Bi-direction)
190 * 2 x Digital Output
191 * 2 x Relay Output (5A@250VAC / 30VDC)
192 * 2 x 0~~20mA Analog Input (res:0.01mA)
193 * 2 x 0~~30V Analog Input (res:0.01v)
194 * 1 x Counting Port
195 )))
196
197 = 2. Power ON Device =
198
199 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.
200
201 (((
202 PWR will on when device is properly powered.
203 )))
204
205 [[image:1653297104069-180.png]]
206
207
208
209 = 3. Operation Mode =
210
211 == 3.1 How it works? ==
212
213 (((
214 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. 
215 )))
216
217 (((
218 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.
219
220
221 )))
222
223
224
225 == 3.2 Example to join LoRaWAN network ==
226
227 (((
228 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. 
229 )))
230
231 [[image:image-20220523172350-1.png||height="266" width="864"]]
232
233 (((
234 The LG308 is already set to connect to [[TTN network >>url:https://www.thethingsnetwork.org/]]. So what we need to do now is only configure register this device to TTN:
235 )))
236
237 (((
238 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
239 )))
240
241 (((
242 Each LT is shipped with a sticker with the default device EUI as below:
243 )))
244
245 [[image:1653297924498-393.png]]
246
247 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
248
249 Add APP EUI in the application.
250
251 [[image:1653297955910-247.png||height="321" width="716"]]
252
253
254 Add APP KEY and DEV EUI
255
256 [[image:1653298023685-319.png]]
257
258
259 (((
260 **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.
261 )))
262
263 [[image:1653298044601-602.png||height="405" width="709"]]
264
265
266
267 == 3.3 Uplink Payload ==
268
269 There are five working modes + one interrupt mode on LT for different type application:
270
271 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
272 * **MOD2**: Double DI Counting + DO + RO
273 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
274 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
275 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
276 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
277
278 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
279
280 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
281
282 [[image:image-20220523174024-3.png]]
283
284 (((
285 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
286 )))
287
288 [[image:image-20220523174254-4.png]]
289
290 * RO is for relay. ROx=1 : close，ROx=0 always open.
291 * DI is for digital input. DIx=1: high or float, DIx=0: low.
292 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
293
294 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
295
296 For example if payload is: [[image:image-20220523175847-2.png]]
297
298 **The value for the interface is:  **
299
300 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
301
302 AVI2 channel voltage is 0x04AC/1000=1.196V
303
304 ACI1 channel current is 0x1310/1000=4.880mA
305
306 ACI2 channel current is 0x1300/1000=4.864mA
307
308 The last byte 0xAA= 10101010(B) means
309
310 * [1] RO1 relay channel is close and the RO1 LED is ON.
311 * [0] RO2 relay channel is open and RO2 LED is OFF;
312
313 **LT22222-L:**
314
315 * [1] DI2 channel is high input and DI2 LED is ON;
316 * [0] DI1 channel is low input;
317
318 * [0] DO3 channel output state
319 ** DO3 is float in case no load between DO3 and V+.;
320 ** DO3 is high in case there is load between DO3 and V+.
321 ** DO3 LED is off in both case
322 * [1] DO2 channel output is low and DO2 LED is ON.
323 * [0] DO1 channel output state
324 ** DO1 is float in case no load between DO1 and V+.;
325 ** DO1 is high in case there is load between DO1 and V+.
326 ** DO1 LED is off in both case
327
328 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
329
330 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
331
332 (((
333 Total : 11 bytes payload
334 )))
335
336 [[image:image-20220523180452-3.png]]
337
338 (((
339 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
340 )))
341
342 [[image:image-20220523180506-4.png]]
343
344 * RO is for relay. ROx=1 : close，ROx=0 always open.
345 * FIRST: Indicate this is the first packet after join network.
346 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
347
348 (((
349 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
350 )))
351
352 (((
353 **To use counting mode, please run:**
354 )))
355
356 (% class="box infomessage" %)
357 (((
358 (((
359 **AT+MOD=2**
360 )))
361 )))
362
363 (% class="box infomessage" %)
364 (((
365 (((
366 **ATZ**
367 )))
368 )))
369
370 (((
371 (% style="color:#4f81bd" %)**AT Commands for counting:**
372 )))
373
374 (((
375 **For LT22222-L:**
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
382 )))
383 )))
384
385 (% class="box infomessage" %)
386 (((
387 (((
388 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
389 )))
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
396 )))
397 )))
398
399 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
403 )))
404 )))
405
406 (% class="box infomessage" %)
407 (((
408 (((
409 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
410 )))
411 )))
412
413 (% class="box infomessage" %)
414 (((
415 (((
416 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
417 )))
418 )))
419
420
421
422 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
423
424 **LT22222-L**: This mode the DI1 is used as a counting pin.
425
426 [[image:image-20220523181246-5.png]]
427
428 (((
429 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
430 )))
431
432 [[image:image-20220523181301-6.png]]
433
434 * RO is for relay. ROx=1 : close，ROx=0 always open.
435 * FIRST: Indicate this is the first packet after join network.
436 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
437
438 (((
439 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
440 )))
441
442 (((
443 **To use counting mode, please run:**
444 )))
445
446 (% class="box infomessage" %)
447 (((
448 (((
449 **AT+MOD=3**
450 )))
451 )))
452
453 (% class="box infomessage" %)
454 (((
455 (((
456 **ATZ**
457 )))
458 )))
459
460 (((
461 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
462
463
464 )))
465
466
467
468 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
469
470
471 **LT22222-L**: This mode the DI1 is used as a counting pin.
472
473 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.
474
475 [[image:image-20220523181903-8.png]]
476
477
478 (((
479 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
480 )))
481
482 [[image:image-20220523181727-7.png]]
483
484 * RO is for relay. ROx=1 : close，ROx=0 always open.
485 * FIRST: Indicate this is the first packet after join network.
486 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
487
488 (((
489 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
490 )))
491
492 (((
493
494
495 **To use this mode, please run:**
496 )))
497
498 (% class="box infomessage" %)
499 (((
500 (((
501 **AT+MOD=4**
502 )))
503 )))
504
505 (% class="box infomessage" %)
506 (((
507 (((
508 **ATZ**
509 )))
510 )))
511
512 (((
513
514 )))
515
516 (((
517 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
518 )))
519
520 (((
521
522
523 **Plus below command for AVI1 Counting:**
524 )))
525
526 (% class="box infomessage" %)
527 (((
528 (((
529 **AT+SETCNT=3,60   (set AVI Count to 60)**
530 )))
531 )))
532
533 (% class="box infomessage" %)
534 (((
535 (((
536 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
537 )))
538 )))
539
540 (% class="box infomessage" %)
541 (((
542 (((
543 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
544 )))
545 )))
546
547 (% class="box infomessage" %)
548 (((
549 (((
550 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
551 )))
552 )))
553
554
555
556 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
557
558
559 **LT22222-L**: This mode the DI1 is used as a counting pin.
560
561 [[image:image-20220523182334-9.png]]
562
563 (((
564
565
566 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
567 )))
568
569 * RO is for relay. ROx=1 : close，ROx=0 always open.
570 * FIRST: Indicate this is the first packet after join network.
571 * (((
572 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
573 )))
574
575 (((
576 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
577 )))
578
579 (((
580
581
582 **To use this mode, please run:**
583 )))
584
585 (% class="box infomessage" %)
586 (((
587 (((
588 **AT+MOD=5**
589 )))
590 )))
591
592 (% class="box infomessage" %)
593 (((
594 (((
595 **ATZ**
596 )))
597 )))
598
599 (((
600 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
601 )))
602
603
604
605 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
606
607
608 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
609
610 For example, if user has configured below commands:
611
612 * **AT+MOD=1 ** **~-~->** The normal working mode
613 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
614
615
616 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
617
618 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
619 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.**
620
621
622 **AT Command to set Trigger Condition**:
623
624 (% style="color:#4f81bd" %)**Trigger base on voltage**:
625
626 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
627
628 **Example:**
629
630 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)
631
632 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
633
634
635 (% style="color:#4f81bd" %)**Trigger base on current**:
636
637 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
638
639 **Example:**
640
641 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
642
643
644 (% style="color:#4f81bd" %)**Trigger base on DI status**:
645
646 DI status trigger Flag.
647
648 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
649
650 **Example:**
651
652 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
653
654
655 **Downlink Command to set Trigger Condition**
656
657 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
658
659 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
660
661 AA: Code for this downlink Command:
662
663 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
664
665 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
666
667 yy2 yy2: AC1 or AV1 high limit.
668
669 yy3 yy3: AC2 or AV2 low limit.
670
671 Yy4 yy4: AC2 or AV2 high limit.
672
673
674 **Example1**: AA 00 13 88 00 00 00 00 00 00
675
676 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
677
678
679 **Example2**: AA 02 01 00
680
681 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
682
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
691 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
692
693 [[image:image-20220524090106-2.png]]
694
695 * Each bits shows if the corresponding trigger has been configured.
696
697
698 **Example:**
699
700 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
701
702
703 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
704
705 [[image:image-20220524090249-3.png]]
706
707 * Each bits shows which status has been trigger on this uplink.
708
709
710 **Example:**
711
712 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
713
714
715 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
716
717 [[image:image-20220524090456-4.png]]
718
719 * Each bits shows which status has been trigger on this uplink.
720
721
722 **Example:**
723
724 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
725
726 00000101: Means both DI1 and DI2 trigger are enabled.
727
728
729 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
730
731 Downlink command to poll MOD6 status:
732
733 **AB 06**
734
735 When device got this command, it will send the MOD6 payload.
736
737
738
739 === 3.3.7 Payload Decoder ===
740
741 (((
742 **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/]]
743
744
745 )))
746
747
748
749 == 3.4 ​Configure LT via AT or Downlink ==
750
751 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
752
753 (((
754 There are two kinds of Commands:
755 )))
756
757 * (% 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]]
758
759 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
760
761
762
763 === 3.4.1 Common Commands ===
764
765 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]]
766
767
768
769 === 3.4.2 Sensor related commands ===
770
771 ==== 3.4.2.1 Set Transmit Interval ====
772
773 Set device uplink interval.
774
775 * AT Command:
776
777 (% class="box infomessage" %)
778 (((
779 **AT+TDC=N **
780 )))
781
782 **Example: **AT+TDC=30000. Means set interval to 30 seconds
783
784
785 * Downlink Payload (prefix 0x01):
786
787 (% class="box infomessage" %)
788 (((
789 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
790 )))
791
792
793
794 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
795
796 Set work mode.
797
798 * AT Command:
799
800 (% class="box infomessage" %)
801 (((
802 **AT+MOD=N  **
803 )))
804
805 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
806
807
808 * Downlink Payload (prefix 0x0A):
809
810 (% class="box infomessage" %)
811 (((
812 **0x0A aa     ~/~/ Same as AT+MOD=aa**
813 )))
814
815
816
817 ==== 3.4.2.3 Poll an uplink ====
818
819 * AT Command:
820
821 There is no AT Command to poll uplink
822
823
824 * Downlink Payload (prefix 0x08):
825
826 (% class="box infomessage" %)
827 (((
828 **0x08 FF     ~/~/ Poll an uplink,**
829 )))
830
831 **Example**: 0x08FF, ask device to send an Uplink
832
833
834
835 ==== 3.4.2.4 Enable Trigger Mode ====
836
837 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
838
839 * AT Command:
840
841 (% class="box infomessage" %)
842 (((
843 **AT+ADDMOD6=1 or 0**
844 )))
845
846 1: Enable Trigger Mode
847
848 0: Disable Trigger Mode
849
850
851 * Downlink Payload (prefix 0x0A 06):
852
853 (% class="box infomessage" %)
854 (((
855 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
856 )))
857
858
859
860 ==== 3.4.2.5 Poll trigger settings ====
861
862 Poll trigger settings,
863
864 * AT Command:
865
866 There is no AT Command for this feature.
867
868
869 * Downlink Payload (prefix 0x AB 06):
870
871 (% class="box infomessage" %)
872 (((
873 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
874 )))
875
876
877
878 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
879
880 Enable Disable DI1/DI2/DI2 as trigger,
881
882 * AT Command:
883
884 (% class="box infomessage" %)
885 (((
886 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
887 )))
888
889
890 **Example:**
891
892 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
893
894 * Downlink Payload (prefix 0xAA 02):
895
896 (% class="box infomessage" %)
897 (((
898 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
899 )))
900
901
902
903 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
904
905 Set DI1 or DI3(for LT-33222-L) trigger.
906
907 * AT Command:
908
909 (% class="box infomessage" %)
910 (((
911 **AT+TRIG1=a,b**
912 )))
913
914 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
915
916 b : delay timing.
917
918
919 **Example:**
920
921 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
922
923
924 * Downlink Payload (prefix 0x09 01 ):
925
926 (% class="box infomessage" %)
927 (((
928 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
929 )))
930
931
932
933 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
934
935 Set DI2 trigger.
936
937 * AT Command:
938
939 (% class="box infomessage" %)
940 (((
941 **AT+TRIG2=a,b**
942 )))
943
944 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
945
946 b : delay timing.
947
948
949 **Example:**
950
951 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
952
953
954 * Downlink Payload (prefix 0x09 02 ):
955
956 (% class="box infomessage" %)
957 (((
958 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
959 )))
960
961
962
963 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
964
965 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
966
967 * AT Command:
968
969 (% class="box infomessage" %)
970 (((
971 **AT+ACLIM. **
972 )))
973
974
975 * Downlink Payload (prefix 0xAA 01 ):
976
977 (% class="box infomessage" %)
978 (((
979 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
980 )))
981
982
983
984 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
985
986 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
987
988 * AT Command:
989
990 (% class="box infomessage" %)
991 (((
992 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
993 )))
994
995
996 * Downlink Payload (prefix 0xAA 00 ):
997
998 (% class="box infomessage" %)
999 (((
1000 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1001 )))
1002
1003
1004
1005 ==== 3.4.2.11 Trigger – Set minimum interval ====
1006
1007 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1008
1009 * AT Command:
1010
1011 (% class="box infomessage" %)
1012 (((
1013 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1014 )))
1015
1016
1017 * Downlink Payload (prefix 0xAC ):
1018
1019 (% class="box infomessage" %)
1020 (((
1021 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1022 )))
1023
1024
1025
1026 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1027
1028 * AT Command:
1029
1030 There is no AT Command to control Digital Output
1031
1032
1033 * Downlink Payload (prefix 0x02):
1034
1035 (% class="box infomessage" %)
1036 (((
1037 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1038 )))
1039
1040 (((
1041 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1042 )))
1043
1044 (((
1045 01: Low,  00: High ,  11: No action
1046 )))
1047
1048 [[image:image-20220524092754-5.png]]
1049
1050 (((
1051 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1052 )))
1053
1054 (((
1055 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1056 )))
1057
1058
1059
1060 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1061
1062 * AT Command:
1063
1064 There is no AT Command to control Digital Output
1065
1066
1067 * Downlink Payload (prefix 0xA9):
1068
1069 (% class="box infomessage" %)
1070 (((
1071 (((
1072 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1073 )))
1074 )))
1075
1076 This is to control the digital output time of DO pin. Include four bytes:
1077
1078 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1079
1080 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1081
1082 01: DO pins will change back to original state after timeout.
1083
1084 00: DO pins will change to an inverter state after timeout 
1085
1086
1087 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1088
1089 [[image:image-20220524093238-6.png]]
1090
1091
1092 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1093
1094 [[image:image-20220524093328-7.png]]
1095
1096
1097 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1098
1099 [[image:image-20220524093351-8.png]]
1100
1101
1102 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1103
1104 Latching time. Unit: ms
1105
1106 Device will upload a packet if downlink code executes successfully.
1107
1108
1109 **Example payload:**
1110
1111 **~1. A9 01 01 01 01 07 D0**
1112
1113 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1114
1115 **2. A9 01 00 01 11 07 D0**
1116
1117 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1118
1119 **3. A9 00 00 00 00 07 D0**
1120
1121 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1122
1123 **4. A9 00 11 01 00 07 D0**
1124
1125 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
1126
1127
1128
1129 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1130
1131 * AT Command:
1132
1133 There is no AT Command to control Relay Output
1134
1135
1136 * Downlink Payload (prefix 0x03):
1137
1138 (% class="box infomessage" %)
1139 (((
1140 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1141 )))
1142
1143 (((
1144 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1145 )))
1146
1147 (((
1148 01: Close ,  00: Open , 11: No action
1149 )))
1150
1151 (((
1152 [[image:image-20220524093724-9.png]]
1153 )))
1154
1155 Device will upload a packet if downlink code executes successfully.
1156
1157
1158
1159 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1160
1161 * AT Command:
1162
1163 There is no AT Command to control Relay Output
1164
1165
1166 * Downlink Payload (prefix 0x05):
1167
1168 (% class="box infomessage" %)
1169 (((
1170 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1171 )))
1172
1173 This is to control the relay output time of relay. Include four bytes:
1174
1175 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1176
1177 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1178
1179 01: Relays will change back to original state after timeout.
1180
1181 00: Relays will change to an inverter state after timeout
1182
1183
1184 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1185
1186 [[image:image-20220524093831-10.png]]
1187
1188
1189 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1190
1191 Device will upload a packet if downlink code executes successfully.
1192
1193
1194 **Example payload:**
1195
1196 **~1. 05 01 11 07 D0**
1197
1198 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1199
1200 **2. 05 01 10 07 D0**
1201
1202 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1203
1204 **3. 05 00 01 07 D0**
1205
1206 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1207
1208 **4. 05 00 00 07 D0**
1209
1210 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1211
1212
1213
1214 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1215
1216 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1217
1218 * AT Command:
1219
1220 (% class="box infomessage" %)
1221 (((
1222 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1223 )))
1224
1225
1226 * Downlink Payload (prefix 0xA5):
1227
1228 (% class="box infomessage" %)
1229 (((
1230 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1231 )))
1232
1233
1234
1235 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1236
1237 * AT Command:
1238
1239 (% class="box infomessage" %)
1240 (((
1241 **AT+SETCNT=aa,(bb cc dd ee) **
1242 )))
1243
1244 aa: 1: Set count1,
1245
1246 2: Set count2,
1247
1248 3: Set AV1 count
1249
1250 Bb cc dd ee: number to be set
1251
1252
1253 * Downlink Payload (prefix 0xA8):
1254
1255 (% class="box infomessage" %)
1256 (((
1257 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1258 )))
1259
1260
1261
1262 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1263
1264 Clear counting for counting mode
1265
1266 * AT Command:
1267
1268 (% class="box infomessage" %)
1269 (((
1270 **AT+CLRCOUNT ~/~/ clear all counting**
1271 )))
1272
1273 * Downlink Payload (prefix 0xA6):
1274
1275 (% class="box infomessage" %)
1276 (((
1277 **0x A6 01     ~/~/ clear all counting,**
1278 )))
1279
1280
1281
1282 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1283
1284 * AT Command:
1285
1286 (% class="box infomessage" %)
1287 (((
1288 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1289 )))
1290
1291 * Downlink Payload (prefix 0xA7):
1292
1293 (% class="box infomessage" %)
1294 (((
1295 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1296 )))
1297
1298 (((
1299 range: aa bb cc:0 to 16777215,  (unit:second)
1300
1301
1302 )))
1303
1304
1305 == 3.5 Integrate with Mydevice ==
1306
1307 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:
1308
1309 (((
1310 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1311 )))
1312
1313 (((
1314 (% style="color:blue" %)**Step 2**(%%): To configure the Application to forward data to Mydevices you will need to add integration. To add the Mydevices integration, perform the following steps:
1315 )))
1316
1317 [[image:1653356737703-362.png||height="232" width="732"]]
1318
1319 [[image:image-20220524094641-11.png||height="390" width="723"]]
1320
1321
1322 [[image:image-20220524094641-12.png||height="402" width="718"]]
1323
1324
1325 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1326
1327 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1328
1329 Search under The things network
1330
1331 [[image:1653356838789-523.png||height="337" width="740"]]
1332
1333
1334
1335 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1336
1337 [[image:image-20220524094909-1.png||height="335" width="729"]]
1338
1339
1340 [[image:image-20220524094909-2.png||height="337" width="729"]]
1341
1342
1343 [[image:image-20220524094909-3.png||height="338" width="727"]]
1344
1345
1346 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1347
1348
1349 [[image:image-20220524094909-5.png||height="341" width="734"]]
1350
1351
1352
1353 == 3.6 Interface Detail ==
1354
1355 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1356
1357 Support NPN Type sensor
1358
1359 [[image:1653356991268-289.png]]
1360
1361
1362
1363 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1364
1365 (((
1366 The DI port of LT-22222-L can support NPN or PNP output sensor.
1367 )))
1368
1369 (((
1370 (((
1371 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
1372 )))
1373 )))
1374
1375 [[image:1653357170703-587.png]]
1376
1377 (((
1378 (((
1379 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1380 )))
1381 )))
1382
1383 (((
1384
1385 )))
1386
1387 (((
1388 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1389 )))
1390
1391 (((
1392 This type of sensor will output a low signal GND when active.
1393 )))
1394
1395 * (((
1396 Connect sensor’s output to DI1-
1397 )))
1398 * (((
1399 Connect sensor’s VCC to DI1+.
1400 )))
1401
1402 (((
1403 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1404 )))
1405
1406 (((
1407 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1408 )))
1409
1410 (((
1411 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.
1412 )))
1413
1414 (((
1415
1416 )))
1417
1418 (((
1419 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1420 )))
1421
1422 (((
1423 This type of sensor will output a high signal (example 24v) when active.
1424 )))
1425
1426 * (((
1427 Connect sensor’s output to DI1+
1428 )))
1429 * (((
1430 Connect sensor’s GND DI1-.
1431 )))
1432
1433 (((
1434 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1435 )))
1436
1437 (((
1438 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1439 )))
1440
1441 (((
1442 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.
1443 )))
1444
1445 (((
1446
1447 )))
1448
1449 (((
1450 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1451 )))
1452
1453 (((
1454 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1455 )))
1456
1457 * (((
1458 Connect sensor’s output to DI1+ with a serial 50K resistor
1459 )))
1460 * (((
1461 Connect sensor’s GND DI1-.
1462 )))
1463
1464 (((
1465 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1466 )))
1467
1468 (((
1469 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1470 )))
1471
1472 (((
1473 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.
1474 )))
1475
1476
1477
1478 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1479
1480 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1481
1482 [[image:1653357531600-905.png]]
1483
1484
1485
1486 === 3.6.4 Analog Input Interface ===
1487
1488 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:
1489
1490
1491 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1492
1493 [[image:1653357592296-182.png]]
1494
1495 Example to connect a 4~~20mA sensor
1496
1497 We take the wind speed sensor as an example for reference only.
1498
1499
1500 **Specifications of the wind speed sensor:**
1501
1502 Red:  12~~24v
1503
1504 Yellow:  4~~20mA
1505
1506 Black:  GND
1507
1508
1509 **Connection diagram:**
1510
1511 [[image:1653357640609-758.png]]
1512
1513 [[image:1653357648330-671.png||height="155" width="733"]]
1514
1515
1516
1517 === 3.6.5 Relay Output ===
1518
1519 (((
1520 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:
1521 )))
1522
1523 [[image:image-20220524100215-9.png]]
1524
1525 [[image:image-20220524100215-10.png||height="382" width="723"]]
1526
1527
1528
1529 == 3.7 LEDs Indicators ==
1530
1531 [[image:image-20220524100748-11.png]]
1532
1533
1534 = 4. Use AT Command =
1535
1536 == 4.1 Access AT Command ==
1537
1538 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.
1539
1540 [[image:1653358238933-385.png]]
1541
1542
1543 (((
1544 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:
1545 )))
1546
1547 [[image:1653358355238-883.png]]
1548
1549
1550 (((
1551 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/]]
1552 )))
1553
1554 (((
1555 AT+<CMD>?        : Help on <CMD>
1556 )))
1557
1558 (((
1559 AT+<CMD>         : Run <CMD>
1560 )))
1561
1562 (((
1563 AT+<CMD>=<value> : Set the value
1564 )))
1565
1566 (((
1567 AT+<CMD>=?       : Get the value
1568 )))
1569
1570 (((
1571 ATZ: Trig a reset of the MCU
1572 )))
1573
1574 (((
1575 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1576 )))
1577
1578 (((
1579 AT+DEUI: Get or Set the Device EUI
1580 )))
1581
1582 (((
1583 AT+DADDR: Get or Set the Device Address
1584 )))
1585
1586 (((
1587 AT+APPKEY: Get or Set the Application Key
1588 )))
1589
1590 (((
1591 AT+NWKSKEY: Get or Set the Network Session Key
1592 )))
1593
1594 (((
1595 AT+APPSKEY: Get or Set the Application Session Key
1596 )))
1597
1598 (((
1599 AT+APPEUI: Get or Set the Application EUI
1600 )))
1601
1602 (((
1603 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1604 )))
1605
1606 (((
1607 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1608 )))
1609
1610 (((
1611 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1612 )))
1613
1614 (((
1615 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1616 )))
1617
1618 (((
1619 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1620 )))
1621
1622 (((
1623 AT+RX2FQ: Get or Set the Rx2 window frequency
1624 )))
1625
1626 (((
1627 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1628 )))
1629
1630 (((
1631 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1632 )))
1633
1634 (((
1635 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1636 )))
1637
1638 (((
1639 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1640 )))
1641
1642 (((
1643 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1644 )))
1645
1646 (((
1647 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1648 )))
1649
1650 (((
1651 AT+NWKID: Get or Set the Network ID
1652 )))
1653
1654 (((
1655 AT+FCU: Get or Set the Frame Counter Uplink
1656 )))
1657
1658 (((
1659 AT+FCD: Get or Set the Frame Counter Downlink
1660 )))
1661
1662 (((
1663 AT+CLASS: Get or Set the Device Class
1664 )))
1665
1666 (((
1667 AT+JOIN: Join network
1668 )))
1669
1670 (((
1671 AT+NJS: Get OTAA Join Status
1672 )))
1673
1674 (((
1675 AT+SENDB: Send hexadecimal data along with the application port
1676 )))
1677
1678 (((
1679 AT+SEND: Send text data along with the application port
1680 )))
1681
1682 (((
1683 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1684 )))
1685
1686 (((
1687 AT+RECV: Print last received data in raw format
1688 )))
1689
1690 (((
1691 AT+VER: Get current image version and Frequency Band
1692 )))
1693
1694 (((
1695 AT+CFM: Get or Set the confirmation mode (0-1)
1696 )))
1697
1698 (((
1699 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1700 )))
1701
1702 (((
1703 AT+SNR: Get the SNR of the last received packet
1704 )))
1705
1706 (((
1707 AT+RSSI: Get the RSSI of the last received packet
1708 )))
1709
1710 (((
1711 AT+TDC: Get or set the application data transmission interval in ms
1712 )))
1713
1714 (((
1715 AT+PORT: Get or set the application port
1716 )))
1717
1718 (((
1719 AT+DISAT: Disable AT commands
1720 )))
1721
1722 (((
1723 AT+PWORD: Set password, max 9 digits
1724 )))
1725
1726 (((
1727 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1728 )))
1729
1730 (((
1731 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1732 )))
1733
1734 (((
1735 AT+CFG: Print all settings
1736
1737
1738 )))
1739
1740
1741
1742 == 4.2 Common AT Command Sequence ==
1743
1744 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1745
1746 (((
1747
1748
1749 **If device has not joined network yet:**
1750 )))
1751
1752 (((
1753 (% style="background-color:#dcdcdc" %)123456
1754 )))
1755
1756 (((
1757 (% style="background-color:#dcdcdc" %)AT+FDR
1758 )))
1759
1760 (((
1761 (% style="background-color:#dcdcdc" %)123456
1762 )))
1763
1764 (((
1765 (% style="background-color:#dcdcdc" %)AT+NJM=0
1766 )))
1767
1768 (((
1769 (% style="background-color:#dcdcdc" %)ATZ
1770 )))
1771
1772
1773 (((
1774 **If device already joined network:**
1775 )))
1776
1777 (((
1778 (% style="background-color:#dcdcdc" %)AT+NJM=0
1779 )))
1780
1781 (((
1782 (% style="background-color:#dcdcdc" %)ATZ
1783
1784
1785 )))
1786
1787
1788
1789 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1790
1791 (((
1792
1793
1794 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1795 )))
1796
1797 (((
1798 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1799 )))
1800
1801 (((
1802 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1803 )))
1804
1805 (((
1806 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1807 )))
1808
1809 (((
1810 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1811 )))
1812
1813 (((
1814 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1815 )))
1816
1817 (((
1818 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1819 )))
1820
1821 (((
1822 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1823 )))
1824
1825 (((
1826 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1827 )))
1828
1829 (((
1830 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1831 )))
1832
1833 (((
1834 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1835 )))
1836
1837 (((
1838 (% 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.
1839 )))
1840
1841 (((
1842 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1843
1844
1845 )))
1846
1847 (((
1848 (% style="color:red" %)**Note:**
1849 )))
1850
1851 (((
1852 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1853 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1854 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.
1855 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
1856 )))
1857
1858 (((
1859 [[image:1653359097980-169.png||height="188" width="729"]]
1860 )))
1861
1862 (((
1863
1864 )))
1865
1866
1867 === 4.2.3 Change to Class A ===
1868
1869 If sensor JOINED
1870 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1871 ATZ
1872
1873
1874 = 5. FAQ =
1875
1876 == 5.1 How to upgrade the image? ==
1877
1878
1879 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1880
1881 * Support new features
1882 * For bug fix
1883 * Change LoRaWAN bands.
1884
1885 Below shows the hardware connection for how to upload an image to the LT:
1886
1887 [[image:1653359603330-121.png]]
1888
1889
1890 (((
1891 (% style="color:blue" %)**Step1**(%%)**:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
1892 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1893 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1894
1895
1896 (% style="color:blue" %)**For LT-22222-L**(%%):
1897 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.
1898 )))
1899
1900 [[image:image-20220524103407-12.png]]
1901
1902 [[image:image-20220524103429-13.png]]
1903
1904 [[image:image-20220524104033-15.png]]
1905
1906
1907 (% 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:
1908
1909 [[image:1653360054704-518.png||height="186" width="745"]]
1910
1911
1912 (((
1913 (((
1914
1915
1916 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1917 )))
1918 )))
1919
1920 (((
1921 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1922 )))
1923
1924 (((
1925
1926
1927 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1928 )))
1929
1930 (((
1931 (((
1932 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1933 )))
1934 )))
1935
1936 (((
1937 (((
1938 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1939
1940
1941 )))
1942 )))
1943
1944 (((
1945 (% 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.
1946 )))
1947
1948 (((
1949 [[image:1653360231087-571.png||height="401" width="727"]]
1950 )))
1951
1952 (((
1953 (% 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.
1954 )))
1955
1956
1957 (((
1958 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1959 )))
1960
1961 (((
1962 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1963 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1964 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1965 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1966 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1967 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1968 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1969 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1970 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1971 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1972 )))
1973
1974
1975 (((
1976 As shown in below:
1977 )))
1978
1979 [[image:1653360498588-932.png||height="485" width="726"]]
1980
1981
1982 == 5.4 Can I see counting event in Serial? ==
1983
1984 (((
1985 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.
1986
1987
1988 == 5.5 Can i use point to point communication for LT-22222-L? ==
1989
1990 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1991 )))
1992
1993 (((
1994
1995
1996 = 6. Trouble Shooting =
1997 )))
1998
1999 (((
2000 (((
2001 == 6.1 Downlink doesn’t work, how to solve it? ==
2002 )))
2003 )))
2004
2005 (((
2006 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2007 )))
2008
2009 (((
2010
2011
2012 == 6.2 Have trouble to upload image. ==
2013 )))
2014
2015 (((
2016 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2017 )))
2018
2019 (((
2020
2021
2022 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2023 )))
2024
2025 (((
2026 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2027 )))
2028
2029
2030
2031 = 7. Order Info =
2032
2033
2034 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2035
2036
2037 (% style="color:#4f81bd" %)**XXX:**
2038
2039 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2040 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2041 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2042 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2043 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2044 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2045 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2046 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2047 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2048
2049 = 8. Packing Info =
2050
2051
2052 **Package Includes**:
2053
2054 * LT-22222-L I/O Controller x 1
2055 * Stick Antenna for LoRa RF part x 1
2056 * Bracket for controller x1
2057 * Program cable x 1
2058
2059 **Dimension and weight**:
2060
2061 * Device Size: 13.5 x 7 x 3 cm
2062 * Device Weight: 105g
2063 * Package Size / pcs : 14.5 x 8 x 5 cm
2064 * Weight / pcs : 170g
2065
2066 = 9. Support =
2067
2068 * (((
2069 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.
2070 )))
2071 * (((
2072 Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2073 )))
2074
2075 = 10. Reference​​​​​ =
2076
2077 * 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]]
2078 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2079 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2080 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]