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Version 77.74 by Xiaoling on 2022/06/10 09:23
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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 **LT22222-L**: This mode the DI1 is used as a counting pin.
471
472 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.
473
474 [[image:image-20220523181903-8.png]]
475
476 (((
477 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
478 )))
479
480 [[image:image-20220523181727-7.png]]
481
482 * RO is for relay. ROx=1 : close，ROx=0 always open.
483 * FIRST: Indicate this is the first packet after join network.
484 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
485
486 (((
487 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
488 )))
489
490 (((
491 **To use this mode, please run:**
492 )))
493
494 (% class="box infomessage" %)
495 (((
496 (((
497 **AT+MOD=4**
498 )))
499 )))
500
501 (% class="box infomessage" %)
502 (((
503 (((
504 **ATZ**
505 )))
506 )))
507
508 (((
509
510 )))
511
512 (((
513 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
514 )))
515
516 (((
517 **Plus below command for AVI1 Counting:**
518 )))
519
520 (% class="box infomessage" %)
521 (((
522 (((
523 **AT+SETCNT=3,60   (set AVI Count to 60)**
524 )))
525 )))
526
527 (% class="box infomessage" %)
528 (((
529 (((
530 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
531 )))
532 )))
533
534 (% class="box infomessage" %)
535 (((
536 (((
537 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
538 )))
539 )))
540
541 (% class="box infomessage" %)
542 (((
543 (((
544 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
545 )))
546 )))
547
548
549
550 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
551
552 **LT22222-L**: This mode the DI1 is used as a counting pin.
553
554 [[image:image-20220523182334-9.png]]
555
556 (((
557 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
558 )))
559
560 * RO is for relay. ROx=1 : close，ROx=0 always open.
561 * FIRST: Indicate this is the first packet after join network.
562 * (((
563 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
564 )))
565
566 (((
567 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
568 )))
569
570 (((
571 **To use this mode, please run:**
572 )))
573
574 (% class="box infomessage" %)
575 (((
576 (((
577 **AT+MOD=5**
578 )))
579 )))
580
581 (% class="box infomessage" %)
582 (((
583 (((
584 **ATZ**
585 )))
586 )))
587
588 (((
589 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
590
591
592 )))
593
594
595
596 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
597
598 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
599
600 For example, if user has configured below commands:
601
602 * **AT+MOD=1 ** **~-~->** The normal working mode
603 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
604
605 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
606
607 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
608 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.**
609
610 **AT Command to set Trigger Condition**:
611
612 (% style="color:#4f81bd" %)**Trigger base on voltage**:
613
614 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
615
616 **Example:**
617
618 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)
619
620 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
621
622
623 (% style="color:#4f81bd" %)**Trigger base on current**:
624
625 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
626
627 **Example:**
628
629 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
630
631
632 (% style="color:#4f81bd" %)**Trigger base on DI status**:
633
634 DI status trigger Flag.
635
636 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
637
638 **Example:**
639
640 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
641
642
643 **Downlink Command to set Trigger Condition**
644
645 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
646
647 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
648
649 AA: Code for this downlink Command:
650
651 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
652
653 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
654
655 yy2 yy2: AC1 or AV1 high limit.
656
657 yy3 yy3: AC2 or AV2 low limit.
658
659 Yy4 yy4: AC2 or AV2 high limit.
660
661 **Example1**: AA 00 13 88 00 00 00 00 00 00
662
663 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
664
665 **Example2**: AA 02 01 00
666
667 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
668
669
670 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
671
672 MOD6 Payload : total 11 bytes payload
673
674 [[image:image-20220524085923-1.png]]
675
676
677 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
678
679 [[image:image-20220524090106-2.png]]
680
681 * Each bits shows if the corresponding trigger has been configured.
682
683
684 **Example:**
685
686 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
687
688
689 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
690
691 [[image:image-20220524090249-3.png]]
692
693 * Each bits shows which status has been trigger on this uplink.
694
695
696 **Example:**
697
698 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
699
700
701 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
702
703 [[image:image-20220524090456-4.png]]
704
705 * Each bits shows which status has been trigger on this uplink.
706
707 **Example:**
708
709 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
710
711 00000101: Means both DI1 and DI2 trigger are enabled.
712
713
714 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
715
716 Downlink command to poll MOD6 status:
717
718 **AB 06**
719
720 When device got this command, it will send the MOD6 payload.
721
722
723
724 === 3.3.7 Payload Decoder ===
725
726 (((
727 **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/]]
728
729
730 )))
731
732
733
734 == 3.4 ​Configure LT via AT or Downlink ==
735
736 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
737
738 (((
739 There are two kinds of Commands:
740 )))
741
742 * (% 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]]
743
744 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
745
746
747
748 === 3.4.1 Common Commands ===
749
750 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]]
751
752
753
754 === 3.4.2 Sensor related commands ===
755
756 ==== 3.4.2.1 Set Transmit Interval ====
757
758 Set device uplink interval.
759
760 * AT Command:
761
762 (% class="box infomessage" %)
763 (((
764 **AT+TDC=N **
765 )))
766
767 **Example: **AT+TDC=30000. Means set interval to 30 seconds
768
769
770 * Downlink Payload (prefix 0x01):
771
772 (% class="box infomessage" %)
773 (((
774 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
775 )))
776
777
778
779 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
780
781 Set work mode.
782
783 * AT Command:
784
785 (% class="box infomessage" %)
786 (((
787 **AT+MOD=N  **
788 )))
789
790 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
791
792
793 * Downlink Payload (prefix 0x0A):
794
795 (% class="box infomessage" %)
796 (((
797 **0x0A aa     ~/~/ Same as AT+MOD=aa**
798 )))
799
800
801
802 ==== 3.4.2.3 Poll an uplink ====
803
804 * AT Command:
805
806 There is no AT Command to poll uplink
807
808
809 * Downlink Payload (prefix 0x08):
810
811 (% class="box infomessage" %)
812 (((
813 **0x08 FF     ~/~/ Poll an uplink,**
814 )))
815
816 **Example**: 0x08FF, ask device to send an Uplink
817
818
819
820 ==== 3.4.2.4 Enable Trigger Mode ====
821
822 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
823
824 * AT Command:
825
826 (% class="box infomessage" %)
827 (((
828 **AT+ADDMOD6=1 or 0**
829 )))
830
831 1: Enable Trigger Mode
832
833 0: Disable Trigger Mode
834
835
836 * Downlink Payload (prefix 0x0A 06):
837
838 (% class="box infomessage" %)
839 (((
840 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
841 )))
842
843
844
845 ==== 3.4.2.5 Poll trigger settings ====
846
847 Poll trigger settings,
848
849 * AT Command:
850
851 There is no AT Command for this feature.
852
853
854 * Downlink Payload (prefix 0x AB 06):
855
856 (% class="box infomessage" %)
857 (((
858 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
859 )))
860
861
862
863 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
864
865 Enable Disable DI1/DI2/DI2 as trigger,
866
867 * AT Command:
868
869 (% class="box infomessage" %)
870 (((
871 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
872 )))
873
874
875 **Example:**
876
877 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
878
879 * Downlink Payload (prefix 0xAA 02):
880
881 (% class="box infomessage" %)
882 (((
883 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
884 )))
885
886
887
888 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
889
890 Set DI1 or DI3(for LT-33222-L) trigger.
891
892 * AT Command:
893
894 (% class="box infomessage" %)
895 (((
896 **AT+TRIG1=a,b**
897 )))
898
899 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
900
901 b : delay timing.
902
903
904 **Example:**
905
906 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
907
908
909 * Downlink Payload (prefix 0x09 01 ):
910
911 (% class="box infomessage" %)
912 (((
913 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
914 )))
915
916
917
918 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
919
920 Set DI2 trigger.
921
922 * AT Command:
923
924 (% class="box infomessage" %)
925 (((
926 **AT+TRIG2=a,b**
927 )))
928
929 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
930
931 b : delay timing.
932
933
934 **Example:**
935
936 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
937
938
939 * Downlink Payload (prefix 0x09 02 ):
940
941 (% class="box infomessage" %)
942 (((
943 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
944 )))
945
946
947
948 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
949
950 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
951
952 * AT Command:
953
954 (% class="box infomessage" %)
955 (((
956 **AT+ACLIM. **
957 )))
958
959
960 * Downlink Payload (prefix 0xAA 01 ):
961
962 (% class="box infomessage" %)
963 (((
964 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
965 )))
966
967
968
969 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
970
971 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
972
973 * AT Command:
974
975 (% class="box infomessage" %)
976 (((
977 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
978 )))
979
980
981 * Downlink Payload (prefix 0xAA 00 ):
982
983 (% class="box infomessage" %)
984 (((
985 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
986 )))
987
988
989
990 ==== 3.4.2.11 Trigger – Set minimum interval ====
991
992 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
993
994 * AT Command:
995
996 (% class="box infomessage" %)
997 (((
998 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
999 )))
1000
1001
1002 * Downlink Payload (prefix 0xAC ):
1003
1004 (% class="box infomessage" %)
1005 (((
1006 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1007 )))
1008
1009
1010
1011 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1012
1013 * AT Command:
1014
1015 There is no AT Command to control Digital Output
1016
1017
1018 * Downlink Payload (prefix 0x02):
1019
1020 (% class="box infomessage" %)
1021 (((
1022 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1023 )))
1024
1025 (((
1026 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1027 )))
1028
1029 (((
1030 01: Low,  00: High ,  11: No action
1031 )))
1032
1033 [[image:image-20220524092754-5.png]]
1034
1035 (((
1036 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1037 )))
1038
1039 (((
1040 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1041 )))
1042
1043
1044
1045 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1046
1047 * AT Command:
1048
1049 There is no AT Command to control Digital Output
1050
1051
1052 * Downlink Payload (prefix 0xA9):
1053
1054 (% class="box infomessage" %)
1055 (((
1056 (((
1057 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1058 )))
1059 )))
1060
1061 This is to control the digital output time of DO pin. Include four bytes:
1062
1063 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1064
1065 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1066
1067 01: DO pins will change back to original state after timeout.
1068
1069 00: DO pins will change to an inverter state after timeout 
1070
1071
1072 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1073
1074 [[image:image-20220524093238-6.png]]
1075
1076
1077 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1078
1079 [[image:image-20220524093328-7.png]]
1080
1081
1082 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1083
1084 [[image:image-20220524093351-8.png]]
1085
1086
1087 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1088
1089 Latching time. Unit: ms
1090
1091 Device will upload a packet if downlink code executes successfully.
1092
1093
1094 **Example payload:**
1095
1096 **~1. A9 01 01 01 01 07 D0**
1097
1098 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1099
1100 **2. A9 01 00 01 11 07 D0**
1101
1102 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1103
1104 **3. A9 00 00 00 00 07 D0**
1105
1106 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1107
1108 **4. A9 00 11 01 00 07 D0**
1109
1110 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
1111
1112
1113
1114 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1115
1116 * AT Command:
1117
1118 There is no AT Command to control Relay Output
1119
1120
1121 * Downlink Payload (prefix 0x03):
1122
1123 (% class="box infomessage" %)
1124 (((
1125 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1126 )))
1127
1128 (((
1129 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1130 )))
1131
1132 (((
1133 01: Close ,  00: Open , 11: No action
1134 )))
1135
1136 (((
1137 [[image:image-20220524093724-9.png]]
1138 )))
1139
1140 Device will upload a packet if downlink code executes successfully.
1141
1142
1143
1144 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1145
1146 * AT Command:
1147
1148 There is no AT Command to control Relay Output
1149
1150
1151 * Downlink Payload (prefix 0x05):
1152
1153 (% class="box infomessage" %)
1154 (((
1155 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1156 )))
1157
1158 This is to control the relay output time of relay. Include four bytes:
1159
1160 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1161
1162 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1163
1164 01: Relays will change back to original state after timeout.
1165
1166 00: Relays will change to an inverter state after timeout
1167
1168
1169 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1170
1171 [[image:image-20220524093831-10.png]]
1172
1173
1174 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1175
1176 Device will upload a packet if downlink code executes successfully.
1177
1178
1179 **Example payload:**
1180
1181 **~1. 05 01 11 07 D0**
1182
1183 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1184
1185 **2. 05 01 10 07 D0**
1186
1187 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1188
1189 **3. 05 00 01 07 D0**
1190
1191 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1192
1193 **4. 05 00 00 07 D0**
1194
1195 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1196
1197
1198
1199 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1200
1201 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1202
1203 * AT Command:
1204
1205 (% class="box infomessage" %)
1206 (((
1207 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1208 )))
1209
1210
1211 * Downlink Payload (prefix 0xA5):
1212
1213 (% class="box infomessage" %)
1214 (((
1215 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1216 )))
1217
1218
1219
1220 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1221
1222 * AT Command:
1223
1224 (% class="box infomessage" %)
1225 (((
1226 **AT+SETCNT=aa,(bb cc dd ee) **
1227 )))
1228
1229 aa: 1: Set count1,
1230
1231 2: Set count2,
1232
1233 3: Set AV1 count
1234
1235 Bb cc dd ee: number to be set
1236
1237
1238 * Downlink Payload (prefix 0xA8):
1239
1240 (% class="box infomessage" %)
1241 (((
1242 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1243 )))
1244
1245
1246
1247 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1248
1249 Clear counting for counting mode
1250
1251 * AT Command:
1252
1253 (% class="box infomessage" %)
1254 (((
1255 **AT+CLRCOUNT ~/~/ clear all counting**
1256 )))
1257
1258 * Downlink Payload (prefix 0xA6):
1259
1260 (% class="box infomessage" %)
1261 (((
1262 **0x A6 01     ~/~/ clear all counting,**
1263 )))
1264
1265
1266
1267 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1268
1269 * AT Command:
1270
1271 (% class="box infomessage" %)
1272 (((
1273 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1274 )))
1275
1276 * Downlink Payload (prefix 0xA7):
1277
1278 (% class="box infomessage" %)
1279 (((
1280 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1281 )))
1282
1283 (((
1284 range: aa bb cc:0 to 16777215,  (unit:second)
1285
1286
1287 )))
1288
1289
1290 == 3.5 Integrate with Mydevice ==
1291
1292 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:
1293
1294 (((
1295 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1296 )))
1297
1298 (((
1299 (% 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:
1300 )))
1301
1302 [[image:1653356737703-362.png||height="232" width="732"]]
1303
1304 [[image:image-20220524094641-11.png||height="390" width="723"]]
1305
1306
1307 [[image:image-20220524094641-12.png||height="402" width="718"]]
1308
1309
1310 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1311
1312 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1313
1314 Search under The things network
1315
1316 [[image:1653356838789-523.png||height="337" width="740"]]
1317
1318
1319
1320 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1321
1322 [[image:image-20220524094909-1.png||height="335" width="729"]]
1323
1324
1325 [[image:image-20220524094909-2.png||height="337" width="729"]]
1326
1327
1328 [[image:image-20220524094909-3.png||height="338" width="727"]]
1329
1330
1331 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1332
1333
1334 [[image:image-20220524094909-5.png||height="341" width="734"]]
1335
1336
1337
1338 == 3.6 Interface Detail ==
1339
1340 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1341
1342 Support NPN Type sensor
1343
1344 [[image:1653356991268-289.png]]
1345
1346
1347
1348 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1349
1350 (((
1351 The DI port of LT-22222-L can support NPN or PNP output sensor.
1352 )))
1353
1354 (((
1355 (((
1356 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
1357 )))
1358 )))
1359
1360 [[image:1653357170703-587.png]]
1361
1362 (((
1363 (((
1364 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1365 )))
1366 )))
1367
1368 (((
1369
1370 )))
1371
1372 (((
1373 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1374 )))
1375
1376 (((
1377 This type of sensor will output a low signal GND when active.
1378 )))
1379
1380 * (((
1381 Connect sensor’s output to DI1-
1382 )))
1383 * (((
1384 Connect sensor’s VCC to DI1+.
1385 )))
1386
1387 (((
1388 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1389 )))
1390
1391 (((
1392 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1393 )))
1394
1395 (((
1396 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.
1397 )))
1398
1399 (((
1400
1401 )))
1402
1403 (((
1404 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1405 )))
1406
1407 (((
1408 This type of sensor will output a high signal (example 24v) when active.
1409 )))
1410
1411 * (((
1412 Connect sensor’s output to DI1+
1413 )))
1414 * (((
1415 Connect sensor’s GND DI1-.
1416 )))
1417
1418 (((
1419 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1420 )))
1421
1422 (((
1423 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1424 )))
1425
1426 (((
1427 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.
1428 )))
1429
1430 (((
1431
1432 )))
1433
1434 (((
1435 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1436 )))
1437
1438 (((
1439 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1440 )))
1441
1442 * (((
1443 Connect sensor’s output to DI1+ with a serial 50K resistor
1444 )))
1445 * (((
1446 Connect sensor’s GND DI1-.
1447 )))
1448
1449 (((
1450 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1451 )))
1452
1453 (((
1454 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1455 )))
1456
1457 (((
1458 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.
1459 )))
1460
1461
1462
1463 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1464
1465 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1466
1467 [[image:1653357531600-905.png]]
1468
1469
1470
1471 === 3.6.4 Analog Input Interface ===
1472
1473 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:
1474
1475
1476 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1477
1478 [[image:1653357592296-182.png]]
1479
1480 Example to connect a 4~~20mA sensor
1481
1482 We take the wind speed sensor as an example for reference only.
1483
1484
1485 **Specifications of the wind speed sensor:**
1486
1487 Red:  12~~24v
1488
1489 Yellow:  4~~20mA
1490
1491 Black:  GND
1492
1493
1494 **Connection diagram:**
1495
1496 [[image:1653357640609-758.png]]
1497
1498 [[image:1653357648330-671.png||height="155" width="733"]]
1499
1500
1501
1502 === 3.6.5 Relay Output ===
1503
1504 (((
1505 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:
1506 )))
1507
1508 [[image:image-20220524100215-9.png]]
1509
1510 [[image:image-20220524100215-10.png||height="382" width="723"]]
1511
1512
1513
1514 == 3.7 LEDs Indicators ==
1515
1516 [[image:image-20220524100748-11.png]]
1517
1518
1519 = 4. Use AT Command =
1520
1521 == 4.1 Access AT Command ==
1522
1523 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.
1524
1525 [[image:1653358238933-385.png]]
1526
1527
1528 (((
1529 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:
1530 )))
1531
1532 [[image:1653358355238-883.png]]
1533
1534
1535 (((
1536 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/]]
1537 )))
1538
1539 (((
1540 AT+<CMD>?        : Help on <CMD>
1541 )))
1542
1543 (((
1544 AT+<CMD>         : Run <CMD>
1545 )))
1546
1547 (((
1548 AT+<CMD>=<value> : Set the value
1549 )))
1550
1551 (((
1552 AT+<CMD>=?       : Get the value
1553 )))
1554
1555 (((
1556 ATZ: Trig a reset of the MCU
1557 )))
1558
1559 (((
1560 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1561 )))
1562
1563 (((
1564 AT+DEUI: Get or Set the Device EUI
1565 )))
1566
1567 (((
1568 AT+DADDR: Get or Set the Device Address
1569 )))
1570
1571 (((
1572 AT+APPKEY: Get or Set the Application Key
1573 )))
1574
1575 (((
1576 AT+NWKSKEY: Get or Set the Network Session Key
1577 )))
1578
1579 (((
1580 AT+APPSKEY: Get or Set the Application Session Key
1581 )))
1582
1583 (((
1584 AT+APPEUI: Get or Set the Application EUI
1585 )))
1586
1587 (((
1588 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1589 )))
1590
1591 (((
1592 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1593 )))
1594
1595 (((
1596 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1597 )))
1598
1599 (((
1600 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1601 )))
1602
1603 (((
1604 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1605 )))
1606
1607 (((
1608 AT+RX2FQ: Get or Set the Rx2 window frequency
1609 )))
1610
1611 (((
1612 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1613 )))
1614
1615 (((
1616 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1617 )))
1618
1619 (((
1620 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1621 )))
1622
1623 (((
1624 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1625 )))
1626
1627 (((
1628 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1629 )))
1630
1631 (((
1632 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1633 )))
1634
1635 (((
1636 AT+NWKID: Get or Set the Network ID
1637 )))
1638
1639 (((
1640 AT+FCU: Get or Set the Frame Counter Uplink
1641 )))
1642
1643 (((
1644 AT+FCD: Get or Set the Frame Counter Downlink
1645 )))
1646
1647 (((
1648 AT+CLASS: Get or Set the Device Class
1649 )))
1650
1651 (((
1652 AT+JOIN: Join network
1653 )))
1654
1655 (((
1656 AT+NJS: Get OTAA Join Status
1657 )))
1658
1659 (((
1660 AT+SENDB: Send hexadecimal data along with the application port
1661 )))
1662
1663 (((
1664 AT+SEND: Send text data along with the application port
1665 )))
1666
1667 (((
1668 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1669 )))
1670
1671 (((
1672 AT+RECV: Print last received data in raw format
1673 )))
1674
1675 (((
1676 AT+VER: Get current image version and Frequency Band
1677 )))
1678
1679 (((
1680 AT+CFM: Get or Set the confirmation mode (0-1)
1681 )))
1682
1683 (((
1684 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1685 )))
1686
1687 (((
1688 AT+SNR: Get the SNR of the last received packet
1689 )))
1690
1691 (((
1692 AT+RSSI: Get the RSSI of the last received packet
1693 )))
1694
1695 (((
1696 AT+TDC: Get or set the application data transmission interval in ms
1697 )))
1698
1699 (((
1700 AT+PORT: Get or set the application port
1701 )))
1702
1703 (((
1704 AT+DISAT: Disable AT commands
1705 )))
1706
1707 (((
1708 AT+PWORD: Set password, max 9 digits
1709 )))
1710
1711 (((
1712 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1713 )))
1714
1715 (((
1716 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1717 )))
1718
1719 (((
1720 AT+CFG: Print all settings
1721
1722
1723 )))
1724
1725
1726
1727 == 4.2 Common AT Command Sequence ==
1728
1729 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1730
1731 (((
1732
1733
1734 **If device has not joined network yet:**
1735 )))
1736
1737 (((
1738 (% style="background-color:#dcdcdc" %)123456
1739 )))
1740
1741 (((
1742 (% style="background-color:#dcdcdc" %)AT+FDR
1743 )))
1744
1745 (((
1746 (% style="background-color:#dcdcdc" %)123456
1747 )))
1748
1749 (((
1750 (% style="background-color:#dcdcdc" %)AT+NJM=0
1751 )))
1752
1753 (((
1754 (% style="background-color:#dcdcdc" %)ATZ
1755 )))
1756
1757
1758 (((
1759 **If device already joined network:**
1760 )))
1761
1762 (((
1763 (% style="background-color:#dcdcdc" %)AT+NJM=0
1764 )))
1765
1766 (((
1767 (% style="background-color:#dcdcdc" %)ATZ
1768
1769
1770 )))
1771
1772
1773
1774 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1775
1776 (((
1777
1778
1779 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1780 )))
1781
1782 (((
1783 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1784 )))
1785
1786 (((
1787 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1788 )))
1789
1790 (((
1791 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1792 )))
1793
1794 (((
1795 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1796 )))
1797
1798 (((
1799 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1800 )))
1801
1802 (((
1803 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1804 )))
1805
1806 (((
1807 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1808 )))
1809
1810 (((
1811 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1812 )))
1813
1814 (((
1815 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1816 )))
1817
1818 (((
1819 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1820 )))
1821
1822 (((
1823 (% 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.
1824 )))
1825
1826 (((
1827 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1828
1829
1830 )))
1831
1832 (((
1833 (% style="color:red" %)**Note:**
1834 )))
1835
1836 (((
1837 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1838 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1839 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.
1840 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
1841 )))
1842
1843 (((
1844 [[image:1653359097980-169.png||height="188" width="729"]]
1845 )))
1846
1847 (((
1848
1849 )))
1850
1851
1852 === 4.2.3 Change to Class A ===
1853
1854 If sensor JOINED
1855 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1856 ATZ
1857
1858
1859 = 5. FAQ =
1860
1861 == 5.1 How to upgrade the image? ==
1862
1863
1864 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1865
1866 * Support new features
1867 * For bug fix
1868 * Change LoRaWAN bands.
1869
1870 Below shows the hardware connection for how to upload an image to the LT:
1871
1872 [[image:1653359603330-121.png]]
1873
1874
1875 (((
1876 (% 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]].
1877 (% 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/]].
1878 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1879
1880
1881 (% style="color:blue" %)**For LT-22222-L**(%%):
1882 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.
1883 )))
1884
1885 [[image:image-20220524103407-12.png]]
1886
1887 [[image:image-20220524103429-13.png]]
1888
1889 [[image:image-20220524104033-15.png]]
1890
1891
1892 (% 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:
1893
1894 [[image:1653360054704-518.png||height="186" width="745"]]
1895
1896
1897 (((
1898 (((
1899
1900
1901 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1902 )))
1903 )))
1904
1905 (((
1906 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1907 )))
1908
1909 (((
1910
1911
1912 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1913 )))
1914
1915 (((
1916 (((
1917 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1918 )))
1919 )))
1920
1921 (((
1922 (((
1923 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1924
1925
1926 )))
1927 )))
1928
1929 (((
1930 (% 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.
1931 )))
1932
1933 (((
1934 [[image:1653360231087-571.png||height="401" width="727"]]
1935 )))
1936
1937 (((
1938 (% 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.
1939 )))
1940
1941
1942 (((
1943 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1944 )))
1945
1946 (((
1947 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1948 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1949 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1950 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1951 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1952 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1953 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1954 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1955 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1956 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1957 )))
1958
1959
1960 (((
1961 As shown in below:
1962 )))
1963
1964 [[image:1653360498588-932.png||height="485" width="726"]]
1965
1966
1967 == 5.4 Can I see counting event in Serial? ==
1968
1969 (((
1970 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.
1971
1972
1973 == 5.5 Can i use point to point communication for LT-22222-L? ==
1974
1975 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1976 )))
1977
1978 (((
1979
1980
1981 = 6. Trouble Shooting =
1982 )))
1983
1984 (((
1985 (((
1986 == 6.1 Downlink doesn’t work, how to solve it? ==
1987 )))
1988 )))
1989
1990 (((
1991 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1992 )))
1993
1994 (((
1995
1996
1997 == 6.2 Have trouble to upload image. ==
1998 )))
1999
2000 (((
2001 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2002 )))
2003
2004 (((
2005
2006
2007 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2008 )))
2009
2010 (((
2011 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2012 )))
2013
2014
2015
2016 = 7. Order Info =
2017
2018
2019 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2020
2021
2022 (% style="color:#4f81bd" %)**XXX:**
2023
2024 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2025 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2026 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2027 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2028 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2029 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2030 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2031 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2032 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2033
2034 = 8. Packing Info =
2035
2036
2037 **Package Includes**:
2038
2039 * LT-22222-L I/O Controller x 1
2040 * Stick Antenna for LoRa RF part x 1
2041 * Bracket for controller x1
2042 * Program cable x 1
2043
2044 **Dimension and weight**:
2045
2046 * Device Size: 13.5 x 7 x 3 cm
2047 * Device Weight: 105g
2048 * Package Size / pcs : 14.5 x 8 x 5 cm
2049 * Weight / pcs : 170g
2050
2051 = 9. Support =
2052
2053 * (((
2054 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.
2055 )))
2056 * (((
2057 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]]
2058 )))
2059
2060 = 10. Reference​​​​​ =
2061
2062 * 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]]
2063 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2064 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2065 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]