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Version 77.82 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 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
608
609 For example, if user has configured below commands:
610
611 * **AT+MOD=1 ** **~-~->** The normal working mode
612 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
613
614
615 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
616
617 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
618 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.**
619
620
621 **AT Command to set Trigger Condition**:
622
623 (% style="color:#4f81bd" %)**Trigger base on voltage**:
624
625 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
626
627 **Example:**
628
629 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)
630
631 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
632
633
634 (% style="color:#4f81bd" %)**Trigger base on current**:
635
636 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
637
638 **Example:**
639
640 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
641
642
643 (% style="color:#4f81bd" %)**Trigger base on DI status**:
644
645 DI status trigger Flag.
646
647 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
648
649 **Example:**
650
651 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
652
653
654 **Downlink Command to set Trigger Condition**
655
656 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
657
658 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
659
660 AA: Code for this downlink Command:
661
662 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
663
664 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
665
666 yy2 yy2: AC1 or AV1 high limit.
667
668 yy3 yy3: AC2 or AV2 low limit.
669
670 Yy4 yy4: AC2 or AV2 high limit.
671
672
673 **Example1**: AA 00 13 88 00 00 00 00 00 00
674
675 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
676
677
678 **Example2**: AA 02 01 00
679
680 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
681
682
683 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
684
685 MOD6 Payload : total 11 bytes payload
686
687 [[image:image-20220524085923-1.png]]
688
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
697 **Example:**
698
699 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
700
701
702 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
703
704 [[image:image-20220524090249-3.png]]
705
706 * Each bits shows which status has been trigger on this uplink.
707
708
709 **Example:**
710
711 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
712
713
714 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
715
716 [[image:image-20220524090456-4.png]]
717
718 * Each bits shows which status has been trigger on this uplink.
719
720
721 **Example:**
722
723 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
724
725 00000101: Means both DI1 and DI2 trigger are enabled.
726
727
728 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
729
730 Downlink command to poll MOD6 status:
731
732 **AB 06**
733
734 When device got this command, it will send the MOD6 payload.
735
736
737
738 === 3.3.7 Payload Decoder ===
739
740 (((
741 **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/]]
742
743
744 )))
745
746
747
748 == 3.4 ​Configure LT via AT or Downlink ==
749
750 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
751
752 (((
753 There are two kinds of Commands:
754 )))
755
756 * (% 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]]
757
758 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
759
760
761
762 === 3.4.1 Common Commands ===
763
764 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]]
765
766
767
768 === 3.4.2 Sensor related commands ===
769
770 ==== 3.4.2.1 Set Transmit Interval ====
771
772 Set device uplink interval.
773
774 * AT Command:
775
776 (% class="box infomessage" %)
777 (((
778 **AT+TDC=N **
779 )))
780
781 **Example: **AT+TDC=30000. Means set interval to 30 seconds
782
783
784 * Downlink Payload (prefix 0x01):
785
786 (% class="box infomessage" %)
787 (((
788 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
789 )))
790
791
792
793 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
794
795 Set work mode.
796
797 * AT Command:
798
799 (% class="box infomessage" %)
800 (((
801 **AT+MOD=N  **
802 )))
803
804 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
805
806
807 * Downlink Payload (prefix 0x0A):
808
809 (% class="box infomessage" %)
810 (((
811 **0x0A aa     ~/~/ Same as AT+MOD=aa**
812 )))
813
814
815
816 ==== 3.4.2.3 Poll an uplink ====
817
818 * AT Command:
819
820 There is no AT Command to poll uplink
821
822
823 * Downlink Payload (prefix 0x08):
824
825 (% class="box infomessage" %)
826 (((
827 **0x08 FF     ~/~/ Poll an uplink,**
828 )))
829
830 **Example**: 0x08FF, ask device to send an Uplink
831
832
833
834 ==== 3.4.2.4 Enable Trigger Mode ====
835
836 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
837
838 * AT Command:
839
840 (% class="box infomessage" %)
841 (((
842 **AT+ADDMOD6=1 or 0**
843 )))
844
845 1: Enable Trigger Mode
846
847 0: Disable Trigger Mode
848
849
850 * Downlink Payload (prefix 0x0A 06):
851
852 (% class="box infomessage" %)
853 (((
854 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
855 )))
856
857
858
859 ==== 3.4.2.5 Poll trigger settings ====
860
861 Poll trigger settings,
862
863 * AT Command:
864
865 There is no AT Command for this feature.
866
867
868 * Downlink Payload (prefix 0x AB 06):
869
870 (% class="box infomessage" %)
871 (((
872 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
873 )))
874
875
876
877 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
878
879 Enable Disable DI1/DI2/DI2 as trigger,
880
881 * AT Command:
882
883 (% class="box infomessage" %)
884 (((
885 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
886 )))
887
888
889 **Example:**
890
891 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
892
893 * Downlink Payload (prefix 0xAA 02):
894
895 (% class="box infomessage" %)
896 (((
897 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
898 )))
899
900
901
902 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
903
904 Set DI1 or DI3(for LT-33222-L) trigger.
905
906 * AT Command:
907
908 (% class="box infomessage" %)
909 (((
910 **AT+TRIG1=a,b**
911 )))
912
913 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
914
915 b : delay timing.
916
917
918 **Example:**
919
920 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
921
922
923 * Downlink Payload (prefix 0x09 01 ):
924
925 (% class="box infomessage" %)
926 (((
927 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
928 )))
929
930
931
932 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
933
934 Set DI2 trigger.
935
936 * AT Command:
937
938 (% class="box infomessage" %)
939 (((
940 **AT+TRIG2=a,b**
941 )))
942
943 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
944
945 b : delay timing.
946
947
948 **Example:**
949
950 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
951
952
953 * Downlink Payload (prefix 0x09 02 ):
954
955 (% class="box infomessage" %)
956 (((
957 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
958 )))
959
960
961
962 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
963
964 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
965
966 * AT Command:
967
968 (% class="box infomessage" %)
969 (((
970 **AT+ACLIM. **
971 )))
972
973
974 * Downlink Payload (prefix 0xAA 01 ):
975
976 (% class="box infomessage" %)
977 (((
978 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
979 )))
980
981
982
983 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
984
985 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
986
987 * AT Command:
988
989 (% class="box infomessage" %)
990 (((
991 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
992 )))
993
994
995 * Downlink Payload (prefix 0xAA 00 ):
996
997 (% class="box infomessage" %)
998 (((
999 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1000 )))
1001
1002
1003
1004 ==== 3.4.2.11 Trigger – Set minimum interval ====
1005
1006 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1007
1008 * AT Command:
1009
1010 (% class="box infomessage" %)
1011 (((
1012 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1013 )))
1014
1015
1016 * Downlink Payload (prefix 0xAC ):
1017
1018 (% class="box infomessage" %)
1019 (((
1020 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1021 )))
1022
1023
1024
1025 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1026
1027 * AT Command:
1028
1029 There is no AT Command to control Digital Output
1030
1031
1032 * Downlink Payload (prefix 0x02):
1033
1034 (% class="box infomessage" %)
1035 (((
1036 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1037 )))
1038
1039 (((
1040 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1041 )))
1042
1043 (((
1044 01: Low,  00: High ,  11: No action
1045 )))
1046
1047 [[image:image-20220524092754-5.png]]
1048
1049 (((
1050 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1051 )))
1052
1053 (((
1054 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1055 )))
1056
1057
1058
1059 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1060
1061 * AT Command:
1062
1063 There is no AT Command to control Digital Output
1064
1065
1066 * Downlink Payload (prefix 0xA9):
1067
1068 (% class="box infomessage" %)
1069 (((
1070 (((
1071 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1072 )))
1073 )))
1074
1075 This is to control the digital output time of DO pin. Include four bytes:
1076
1077 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1078
1079 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1080
1081 01: DO pins will change back to original state after timeout.
1082
1083 00: DO pins will change to an inverter state after timeout 
1084
1085
1086 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1087
1088 [[image:image-20220524093238-6.png]]
1089
1090
1091 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1092
1093 [[image:image-20220524093328-7.png]]
1094
1095
1096 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1097
1098 [[image:image-20220524093351-8.png]]
1099
1100
1101 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1102
1103 Latching time. Unit: ms
1104
1105 Device will upload a packet if downlink code executes successfully.
1106
1107
1108 **Example payload:**
1109
1110 **~1. A9 01 01 01 01 07 D0**
1111
1112 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1113
1114 **2. A9 01 00 01 11 07 D0**
1115
1116 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1117
1118 **3. A9 00 00 00 00 07 D0**
1119
1120 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1121
1122 **4. A9 00 11 01 00 07 D0**
1123
1124 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
1125
1126
1127
1128 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1129
1130 * AT Command:
1131
1132 There is no AT Command to control Relay Output
1133
1134
1135 * Downlink Payload (prefix 0x03):
1136
1137 (% class="box infomessage" %)
1138 (((
1139 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1140 )))
1141
1142 (((
1143 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1144 )))
1145
1146 (((
1147 01: Close ,  00: Open , 11: No action
1148 )))
1149
1150 (((
1151 [[image:image-20220524093724-9.png]]
1152 )))
1153
1154 Device will upload a packet if downlink code executes successfully.
1155
1156
1157
1158 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1159
1160 * AT Command:
1161
1162 There is no AT Command to control Relay Output
1163
1164
1165 * Downlink Payload (prefix 0x05):
1166
1167 (% class="box infomessage" %)
1168 (((
1169 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1170 )))
1171
1172 This is to control the relay output time of relay. Include four bytes:
1173
1174 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1175
1176 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1177
1178 01: Relays will change back to original state after timeout.
1179
1180 00: Relays will change to an inverter state after timeout
1181
1182
1183 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1184
1185 [[image:image-20220524093831-10.png]]
1186
1187
1188 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1189
1190 Device will upload a packet if downlink code executes successfully.
1191
1192
1193 **Example payload:**
1194
1195 **~1. 05 01 11 07 D0**
1196
1197 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1198
1199 **2. 05 01 10 07 D0**
1200
1201 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1202
1203 **3. 05 00 01 07 D0**
1204
1205 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1206
1207 **4. 05 00 00 07 D0**
1208
1209 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1210
1211
1212
1213 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1214
1215 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1216
1217 * AT Command:
1218
1219 (% class="box infomessage" %)
1220 (((
1221 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1222 )))
1223
1224
1225 * Downlink Payload (prefix 0xA5):
1226
1227 (% class="box infomessage" %)
1228 (((
1229 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1230 )))
1231
1232
1233
1234 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1235
1236 * AT Command:
1237
1238 (% class="box infomessage" %)
1239 (((
1240 **AT+SETCNT=aa,(bb cc dd ee) **
1241 )))
1242
1243 aa: 1: Set count1,
1244
1245 2: Set count2,
1246
1247 3: Set AV1 count
1248
1249 Bb cc dd ee: number to be set
1250
1251
1252 * Downlink Payload (prefix 0xA8):
1253
1254 (% class="box infomessage" %)
1255 (((
1256 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1257 )))
1258
1259
1260
1261 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1262
1263 Clear counting for counting mode
1264
1265 * AT Command:
1266
1267 (% class="box infomessage" %)
1268 (((
1269 **AT+CLRCOUNT ~/~/ clear all counting**
1270 )))
1271
1272 * Downlink Payload (prefix 0xA6):
1273
1274 (% class="box infomessage" %)
1275 (((
1276 **0x A6 01     ~/~/ clear all counting,**
1277 )))
1278
1279
1280
1281 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1282
1283 * AT Command:
1284
1285 (% class="box infomessage" %)
1286 (((
1287 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1288 )))
1289
1290 * Downlink Payload (prefix 0xA7):
1291
1292 (% class="box infomessage" %)
1293 (((
1294 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1295 )))
1296
1297 (((
1298 range: aa bb cc:0 to 16777215,  (unit:second)
1299
1300
1301 )))
1302
1303
1304 == 3.5 Integrate with Mydevice ==
1305
1306 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:
1307
1308 (((
1309 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1310 )))
1311
1312 (((
1313 (% 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:
1314 )))
1315
1316 [[image:1653356737703-362.png||height="232" width="732"]]
1317
1318 [[image:image-20220524094641-11.png||height="390" width="723"]]
1319
1320
1321 [[image:image-20220524094641-12.png||height="402" width="718"]]
1322
1323
1324 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1325
1326 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1327
1328 Search under The things network
1329
1330 [[image:1653356838789-523.png||height="337" width="740"]]
1331
1332
1333
1334 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1335
1336 [[image:image-20220524094909-1.png||height="335" width="729"]]
1337
1338
1339 [[image:image-20220524094909-2.png||height="337" width="729"]]
1340
1341
1342 [[image:image-20220524094909-3.png||height="338" width="727"]]
1343
1344
1345 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1346
1347
1348 [[image:image-20220524094909-5.png||height="341" width="734"]]
1349
1350
1351
1352 == 3.6 Interface Detail ==
1353
1354 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1355
1356 Support NPN Type sensor
1357
1358 [[image:1653356991268-289.png]]
1359
1360
1361
1362 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1363
1364 (((
1365 The DI port of LT-22222-L can support NPN or PNP output sensor.
1366 )))
1367
1368 (((
1369 (((
1370 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
1371 )))
1372 )))
1373
1374 [[image:1653357170703-587.png]]
1375
1376 (((
1377 (((
1378 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1379 )))
1380 )))
1381
1382 (((
1383
1384 )))
1385
1386 (((
1387 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1388 )))
1389
1390 (((
1391 This type of sensor will output a low signal GND when active.
1392 )))
1393
1394 * (((
1395 Connect sensor’s output to DI1-
1396 )))
1397 * (((
1398 Connect sensor’s VCC to DI1+.
1399 )))
1400
1401 (((
1402 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1403 )))
1404
1405 (((
1406 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1407 )))
1408
1409 (((
1410 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.
1411 )))
1412
1413 (((
1414
1415 )))
1416
1417 (((
1418 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1419 )))
1420
1421 (((
1422 This type of sensor will output a high signal (example 24v) when active.
1423 )))
1424
1425 * (((
1426 Connect sensor’s output to DI1+
1427 )))
1428 * (((
1429 Connect sensor’s GND DI1-.
1430 )))
1431
1432 (((
1433 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1434 )))
1435
1436 (((
1437 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1438 )))
1439
1440 (((
1441 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.
1442 )))
1443
1444 (((
1445
1446 )))
1447
1448 (((
1449 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1450 )))
1451
1452 (((
1453 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1454 )))
1455
1456 * (((
1457 Connect sensor’s output to DI1+ with a serial 50K resistor
1458 )))
1459 * (((
1460 Connect sensor’s GND DI1-.
1461 )))
1462
1463 (((
1464 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1465 )))
1466
1467 (((
1468 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1469 )))
1470
1471 (((
1472 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.
1473 )))
1474
1475
1476
1477 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1478
1479 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1480
1481 [[image:1653357531600-905.png]]
1482
1483
1484
1485 === 3.6.4 Analog Input Interface ===
1486
1487 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:
1488
1489
1490 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1491
1492 [[image:1653357592296-182.png]]
1493
1494 Example to connect a 4~~20mA sensor
1495
1496 We take the wind speed sensor as an example for reference only.
1497
1498
1499 **Specifications of the wind speed sensor:**
1500
1501 Red:  12~~24v
1502
1503 Yellow:  4~~20mA
1504
1505 Black:  GND
1506
1507
1508 **Connection diagram:**
1509
1510 [[image:1653357640609-758.png]]
1511
1512 [[image:1653357648330-671.png||height="155" width="733"]]
1513
1514
1515
1516 === 3.6.5 Relay Output ===
1517
1518 (((
1519 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:
1520 )))
1521
1522 [[image:image-20220524100215-9.png]]
1523
1524 [[image:image-20220524100215-10.png||height="382" width="723"]]
1525
1526
1527
1528 == 3.7 LEDs Indicators ==
1529
1530 [[image:image-20220524100748-11.png]]
1531
1532
1533 = 4. Use AT Command =
1534
1535 == 4.1 Access AT Command ==
1536
1537 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.
1538
1539 [[image:1653358238933-385.png]]
1540
1541
1542 (((
1543 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:
1544 )))
1545
1546 [[image:1653358355238-883.png]]
1547
1548
1549 (((
1550 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/]]
1551 )))
1552
1553 (((
1554 AT+<CMD>?        : Help on <CMD>
1555 )))
1556
1557 (((
1558 AT+<CMD>         : Run <CMD>
1559 )))
1560
1561 (((
1562 AT+<CMD>=<value> : Set the value
1563 )))
1564
1565 (((
1566 AT+<CMD>=?       : Get the value
1567 )))
1568
1569 (((
1570 ATZ: Trig a reset of the MCU
1571 )))
1572
1573 (((
1574 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1575 )))
1576
1577 (((
1578 AT+DEUI: Get or Set the Device EUI
1579 )))
1580
1581 (((
1582 AT+DADDR: Get or Set the Device Address
1583 )))
1584
1585 (((
1586 AT+APPKEY: Get or Set the Application Key
1587 )))
1588
1589 (((
1590 AT+NWKSKEY: Get or Set the Network Session Key
1591 )))
1592
1593 (((
1594 AT+APPSKEY: Get or Set the Application Session Key
1595 )))
1596
1597 (((
1598 AT+APPEUI: Get or Set the Application EUI
1599 )))
1600
1601 (((
1602 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1603 )))
1604
1605 (((
1606 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1607 )))
1608
1609 (((
1610 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1611 )))
1612
1613 (((
1614 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1615 )))
1616
1617 (((
1618 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1619 )))
1620
1621 (((
1622 AT+RX2FQ: Get or Set the Rx2 window frequency
1623 )))
1624
1625 (((
1626 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1627 )))
1628
1629 (((
1630 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1631 )))
1632
1633 (((
1634 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1635 )))
1636
1637 (((
1638 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1639 )))
1640
1641 (((
1642 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1643 )))
1644
1645 (((
1646 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1647 )))
1648
1649 (((
1650 AT+NWKID: Get or Set the Network ID
1651 )))
1652
1653 (((
1654 AT+FCU: Get or Set the Frame Counter Uplink
1655 )))
1656
1657 (((
1658 AT+FCD: Get or Set the Frame Counter Downlink
1659 )))
1660
1661 (((
1662 AT+CLASS: Get or Set the Device Class
1663 )))
1664
1665 (((
1666 AT+JOIN: Join network
1667 )))
1668
1669 (((
1670 AT+NJS: Get OTAA Join Status
1671 )))
1672
1673 (((
1674 AT+SENDB: Send hexadecimal data along with the application port
1675 )))
1676
1677 (((
1678 AT+SEND: Send text data along with the application port
1679 )))
1680
1681 (((
1682 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1683 )))
1684
1685 (((
1686 AT+RECV: Print last received data in raw format
1687 )))
1688
1689 (((
1690 AT+VER: Get current image version and Frequency Band
1691 )))
1692
1693 (((
1694 AT+CFM: Get or Set the confirmation mode (0-1)
1695 )))
1696
1697 (((
1698 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1699 )))
1700
1701 (((
1702 AT+SNR: Get the SNR of the last received packet
1703 )))
1704
1705 (((
1706 AT+RSSI: Get the RSSI of the last received packet
1707 )))
1708
1709 (((
1710 AT+TDC: Get or set the application data transmission interval in ms
1711 )))
1712
1713 (((
1714 AT+PORT: Get or set the application port
1715 )))
1716
1717 (((
1718 AT+DISAT: Disable AT commands
1719 )))
1720
1721 (((
1722 AT+PWORD: Set password, max 9 digits
1723 )))
1724
1725 (((
1726 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1727 )))
1728
1729 (((
1730 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1731 )))
1732
1733 (((
1734 AT+CFG: Print all settings
1735
1736
1737 )))
1738
1739
1740
1741 == 4.2 Common AT Command Sequence ==
1742
1743 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1744
1745 (((
1746
1747
1748 **If device has not joined network yet:**
1749 )))
1750
1751 (((
1752 (% style="background-color:#dcdcdc" %)123456
1753 )))
1754
1755 (((
1756 (% style="background-color:#dcdcdc" %)AT+FDR
1757 )))
1758
1759 (((
1760 (% style="background-color:#dcdcdc" %)123456
1761 )))
1762
1763 (((
1764 (% style="background-color:#dcdcdc" %)AT+NJM=0
1765 )))
1766
1767 (((
1768 (% style="background-color:#dcdcdc" %)ATZ
1769 )))
1770
1771
1772 (((
1773 **If device already joined network:**
1774 )))
1775
1776 (((
1777 (% style="background-color:#dcdcdc" %)AT+NJM=0
1778 )))
1779
1780 (((
1781 (% style="background-color:#dcdcdc" %)ATZ
1782
1783
1784 )))
1785
1786
1787
1788 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1789
1790 (((
1791
1792
1793 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1794 )))
1795
1796 (((
1797 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1798 )))
1799
1800 (((
1801 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1802 )))
1803
1804 (((
1805 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1806 )))
1807
1808 (((
1809 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1810 )))
1811
1812 (((
1813 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1814 )))
1815
1816 (((
1817 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1818 )))
1819
1820 (((
1821 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1822 )))
1823
1824 (((
1825 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1826 )))
1827
1828 (((
1829 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1830 )))
1831
1832 (((
1833 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1834 )))
1835
1836 (((
1837 (% 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.
1838 )))
1839
1840 (((
1841 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1842
1843
1844 )))
1845
1846 (((
1847 (% style="color:red" %)**Note:**
1848 )))
1849
1850 (((
1851 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1852 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1853 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.
1854 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
1855 )))
1856
1857 (((
1858 [[image:1653359097980-169.png||height="188" width="729"]]
1859 )))
1860
1861 (((
1862
1863 )))
1864
1865
1866 === 4.2.3 Change to Class A ===
1867
1868 If sensor JOINED
1869 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1870 ATZ
1871
1872
1873 = 5. FAQ =
1874
1875 == 5.1 How to upgrade the image? ==
1876
1877
1878 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1879
1880 * Support new features
1881 * For bug fix
1882 * Change LoRaWAN bands.
1883
1884 Below shows the hardware connection for how to upload an image to the LT:
1885
1886 [[image:1653359603330-121.png]]
1887
1888
1889 (((
1890 (% 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]].
1891 (% 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/]].
1892 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1893
1894
1895 (% style="color:blue" %)**For LT-22222-L**(%%):
1896 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.
1897 )))
1898
1899 [[image:image-20220524103407-12.png]]
1900
1901 [[image:image-20220524103429-13.png]]
1902
1903 [[image:image-20220524104033-15.png]]
1904
1905
1906 (% 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:
1907
1908 [[image:1653360054704-518.png||height="186" width="745"]]
1909
1910
1911 (((
1912 (((
1913
1914
1915 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1916 )))
1917 )))
1918
1919 (((
1920 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1921 )))
1922
1923 (((
1924
1925
1926 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1927 )))
1928
1929 (((
1930 (((
1931 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1932 )))
1933 )))
1934
1935 (((
1936 (((
1937 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1938
1939
1940 )))
1941 )))
1942
1943 (((
1944 (% 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.
1945 )))
1946
1947 (((
1948 [[image:1653360231087-571.png||height="401" width="727"]]
1949 )))
1950
1951 (((
1952 (% 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.
1953 )))
1954
1955
1956 (((
1957 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1958 )))
1959
1960 (((
1961 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1962 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1963 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1964 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1965 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1966 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1967 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1968 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1969 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1970 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1971 )))
1972
1973
1974 (((
1975 As shown in below:
1976 )))
1977
1978 [[image:1653360498588-932.png||height="485" width="726"]]
1979
1980
1981 == 5.4 Can I see counting event in Serial? ==
1982
1983 (((
1984 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.
1985
1986
1987 == 5.5 Can i use point to point communication for LT-22222-L? ==
1988
1989 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1990 )))
1991
1992 (((
1993
1994
1995 = 6. Trouble Shooting =
1996 )))
1997
1998 (((
1999 (((
2000 == 6.1 Downlink doesn’t work, how to solve it? ==
2001 )))
2002 )))
2003
2004 (((
2005 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2006 )))
2007
2008 (((
2009
2010
2011 == 6.2 Have trouble to upload image. ==
2012 )))
2013
2014 (((
2015 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2016 )))
2017
2018 (((
2019
2020
2021 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2022 )))
2023
2024 (((
2025 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2026 )))
2027
2028
2029
2030 = 7. Order Info =
2031
2032
2033 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2034
2035
2036 (% style="color:#4f81bd" %)**XXX:**
2037
2038 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2039 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2040 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2041 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2042 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2043 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2044 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2045 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2046 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2047
2048 = 8. Packing Info =
2049
2050
2051 **Package Includes**:
2052
2053 * LT-22222-L I/O Controller x 1
2054 * Stick Antenna for LoRa RF part x 1
2055 * Bracket for controller x1
2056 * Program cable x 1
2057
2058 **Dimension and weight**:
2059
2060 * Device Size: 13.5 x 7 x 3 cm
2061 * Device Weight: 105g
2062 * Package Size / pcs : 14.5 x 8 x 5 cm
2063 * Weight / pcs : 170g
2064
2065 = 9. Support =
2066
2067 * (((
2068 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.
2069 )))
2070 * (((
2071 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]]
2072 )))
2073
2074 = 10. Reference​​​​​ =
2075
2076 * 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]]
2077 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2078 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2079 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]