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Version 122.3 by Xiaoling on 2023/06/08 17:13
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4
5
6 **Table of Contents:**
7
8 {{toc/}}
9
10
11
12
13
14
15
16 = 1.Introduction =
17
18 == 1.1 What is LT Series I/O Controller ==
19
20 (((
21
22
23 (((
24 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.
25 )))
26 )))
27
28 (((
29 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, building automation, and so on.
30 )))
31
32 (((
33 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
34 )))
35
36 (((
37 The use environment includes:
38 )))
39
40 (((
41 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.
42 )))
43
44 (((
45 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
46
47
48 )))
49
50 (((
51 [[image:1653295757274-912.png]]
52
53
54 )))
55
56 == 1.2  Specifications ==
57
58 (((
59
60
61 (% style="color:#037691" %)**Hardware System:**
62 )))
63
64 * (((
65 STM32L072xxxx MCU
66 )))
67 * (((
68 SX1276/78 Wireless Chip 
69 )))
70 * (((
71 (((
72 Power Consumption:
73 )))
74
75 * (((
76 Idle: 4mA@12v
77 )))
78 * (((
79 20dB Transmit: 34mA@12v
80 )))
81 )))
82
83 (((
84
85
86 (% style="color:#037691" %)**Interface for Model: LT22222-L:**
87 )))
88
89 * (((
90 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
91 )))
92 * (((
93 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
94 )))
95 * (((
96 2 x Relay Output (5A@250VAC / 30VDC)
97 )))
98 * (((
99 2 x 0~~20mA Analog Input (res:0.01mA)
100 )))
101 * (((
102 2 x 0~~30V Analog Input (res:0.01v)
103 )))
104 * (((
105 Power Input 7~~ 24V DC. 
106 )))
107
108 (((
109
110
111 (% style="color:#037691" %)**LoRa Spec:**
112 )))
113
114 * (((
115 (((
116 Frequency Range:
117 )))
118
119 * (((
120 Band 1 (HF): 862 ~~ 1020 Mhz
121 )))
122 * (((
123 Band 2 (LF): 410 ~~ 528 Mhz
124 )))
125 )))
126 * (((
127 168 dB maximum link budget.
128 )))
129 * (((
130 +20 dBm - 100 mW constant RF output vs.
131 )))
132 * (((
133 +14 dBm high efficiency PA.
134 )))
135 * (((
136 Programmable bit rate up to 300 kbps.
137 )))
138 * (((
139 High sensitivity: down to -148 dBm.
140 )))
141 * (((
142 Bullet-proof front end: IIP3 = -12.5 dBm.
143 )))
144 * (((
145 Excellent blocking immunity.
146 )))
147 * (((
148 Low RX current of 10.3 mA, 200 nA register retention.
149 )))
150 * (((
151 Fully integrated synthesizer with a resolution of 61 Hz.
152 )))
153 * (((
154 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
155 )))
156 * (((
157 Built-in bit synchronizer for clock recovery.
158 )))
159 * (((
160 Preamble detection.
161 )))
162 * (((
163 127 dB Dynamic Range RSSI.
164 )))
165 * (((
166 Automatic RF Sense and CAD with ultra-fast AFC.
167 )))
168 * (((
169 Packet engine up to 256 bytes with CRC.
170
171
172
173 )))
174
175 == 1.3 Features ==
176
177
178 * LoRaWAN Class A & Class C protocol
179
180 * Optional Customized LoRa Protocol
181
182 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
183
184 * AT Commands to change parameters
185
186 * Remote configure parameters via LoRa Downlink
187
188 * Firmware upgradable via program port
189
190 * Counting
191
192
193
194 == 1.4  Applications ==
195
196
197 * Smart Buildings & Home Automation
198
199 * Logistics and Supply Chain Management
200
201 * Smart Metering
202
203 * Smart Agriculture
204
205 * Smart Cities
206
207 * Smart Factory
208
209
210
211 == 1.5 Hardware Variants ==
212
213
214 (% border="1" style="background-color:#f2f2f2; width:500px" %)
215 |(% style="background-color:#d9e2f3; color:#0070c0; width:103px" %)**Model**|(% style="background-color:#d9e2f3; color:#0070c0; width:131px" %)**Photo**|(% style="background-color:#d9e2f3; color:#0070c0; width:334px" %)**Description**
216 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)(((
217 (% style="text-align:center" %)
218 [[image:image-20230424115112-1.png||height="106" width="58"]]
219 )))|(% style="width:334px" %)(((
220 * 2 x Digital Input (Bi-direction)
221 * 2 x Digital Output
222 * 2 x Relay Output (5A@250VAC / 30VDC)
223 * 2 x 0~~20mA Analog Input (res:0.01mA)
224 * 2 x 0~~30V Analog Input (res:0.01v)
225 * 1 x Counting Port
226 )))
227
228
229
230 = 2. Power ON Device =
231
232
233 (((
234 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.
235 )))
236
237 (((
238 PWR will on when device is properly powered.
239
240
241 )))
242
243 [[image:1653297104069-180.png]]
244
245
246 = 3. Operation Mode =
247
248 == 3.1 How it works? ==
249
250
251 (((
252 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 (% style="color:green" %)**TX LED**(%%) will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. (% style="color:green" %)**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. 
253 )))
254
255 (((
256 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.
257 )))
258
259
260 == 3.2 Example to join LoRaWAN network ==
261
262
263 (((
264 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. 
265
266
267 )))
268
269 [[image:image-20220523172350-1.png||height="266" width="864"]]
270
271
272 (((
273 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:
274
275
276 )))
277
278 (((
279 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
280 )))
281
282 (((
283 Each LT is shipped with a sticker with the default device EUI as below:
284 )))
285
286 [[image:image-20230425173427-2.png||height="246" width="530"]]
287
288
289 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
290
291 **Add APP EUI in the application.**
292
293 [[image:1653297955910-247.png||height="321" width="716"]]
294
295
296 **Add APP KEY and DEV EUI**
297
298 [[image:1653298023685-319.png]]
299
300
301
302 (((
303 (% style="color:blue" %)**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.
304
305
306 )))
307
308 [[image:1653298044601-602.png||height="405" width="709"]]
309
310
311 == 3.3 Uplink Payload ==
312
313
314 There are five working modes + one interrupt mode on LT for different type application:
315
316 * (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
317
318 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
319
320 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
321
322 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
323
324 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
325
326 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
327
328
329
330 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
331
332
333 (((
334 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
335
336 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
337 |(% style="background-color:#D9E2F3;color:#0070C0" %)**Size(bytes)**|(% style="background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="background-color:#D9E2F3;color:#0070C0" %)**1**|(% style="background-color:#D9E2F3;color:#0070C0" %)**1**|(% style="background-color:#D9E2F3;color:#0070C0" %)**1**
338 |Value|(((
339 AVI1 voltage
340 )))|(((
341 AVI2 voltage
342 )))|(((
343 ACI1 Current
344 )))|(((
345 ACI2 Current
346 )))|DIDORO*|(((
347 Reserve
348 )))|MOD
349 )))
350
351 (((
352
353
354 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
355
356 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
357 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
358 |RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
359 )))
360
361
362 * RO is for relay. ROx=1 : close，ROx=0 always open.
363 * DI is for digital input. DIx=1: high or float, DIx=0: low.
364 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
365
366 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
367
368 For example if payload is: [[image:image-20220523175847-2.png]]
369
370
371 **The value for the interface is:  **
372
373 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
374
375 AVI2 channel voltage is 0x04AC/1000=1.196V
376
377 ACI1 channel current is 0x1310/1000=4.880mA
378
379 ACI2 channel current is 0x1300/1000=4.864mA
380
381 The last byte 0xAA= 10101010(B) means
382
383 * [1] RO1 relay channel is close and the RO1 LED is ON.
384 * [0] RO2 relay channel is open and RO2 LED is OFF;
385
386 **LT22222-L:**
387
388 * [1] DI2 channel is high input and DI2 LED is ON;
389 * [0] DI1 channel is low input;
390
391 * [0] DO3 channel output state
392 ** DO3 is float in case no load between DO3 and V+.;
393 ** DO3 is high in case there is load between DO3 and V+.
394 ** DO3 LED is off in both case
395 * [1] DO2 channel output is low and DO2 LED is ON.
396 * [0] DO1 channel output state
397 ** DO1 is float in case no load between DO1 and V+.;
398 ** DO1 is high in case there is load between DO1 and V+.
399 ** DO1 LED is off in both case
400
401 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
402
403
404 (((
405 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
406 )))
407
408 (((
409 Total : 11 bytes payload
410
411 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
412 |(% style="background-color:#D9E2F3;color:#0070C0" %)**Size(bytes)**|(% style="background-color:#D9E2F3;color:#0070C0" %)**4**|(% style="background-color:#D9E2F3;color:#0070C0" %)**4**|(% style="background-color:#D9E2F3;color:#0070C0" %)**1**|(% style="background-color:#D9E2F3;color:#0070C0" %)**1**|(% style="background-color:#D9E2F3;color:#0070C0" %)**1**
413 |Value|COUNT1|COUNT2 |DIDORO*|(((
414 Reserve
415 )))|MOD
416 )))
417
418 (((
419
420
421 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
422
423 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
424 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
425 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
426
427 RO is for relay. ROx=1 : close，ROx=0 always open.
428 )))
429
430 * FIRST: Indicate this is the first packet after join network.
431 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
432
433 (((
434 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
435 )))
436
437 (((
438
439
440 **To use counting mode, please run:**
441 )))
442
443 (% class="box infomessage" %)
444 (((
445 (((
446 (((
447 **AT+MOD=2**
448 )))
449
450 (((
451 **ATZ**
452 )))
453 )))
454 )))
455
456 (((
457
458
459 (% style="color:#4f81bd" %)**AT Commands for counting:**
460
461
462 )))
463
464 (((
465 **For LT22222-L:**
466
467
468 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
469
470 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
471
472 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
473
474 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
475
476 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
477
478 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
479 )))
480
481
482 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
483
484
485 **LT22222-L**: This mode the DI1 is used as a counting pin.
486
487 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
488 |**Size(bytes)**|**4**|**2**|**2**|**1**|**1**|**1**
489 |Value|COUNT1|(((
490 ACI1 Current
491 )))|(((
492 ACI2 Current
493 )))|DIDORO*|Reserve|MOD
494
495 (((
496
497
498 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
499
500 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
501 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
502 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
503 )))
504
505
506 * RO is for relay. ROx=1 : close，ROx=0 always open.
507 * FIRST: Indicate this is the first packet after join network.
508 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
509
510 (((
511 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
512 )))
513
514
515 (((
516 **To use counting mode, please run:**
517 )))
518
519 (% class="box infomessage" %)
520 (((
521 (((
522 (((
523 **AT+MOD=3**
524 )))
525
526 (((
527 **ATZ**
528 )))
529 )))
530 )))
531
532 (((
533 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
534 )))
535
536
537 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
538
539
540 (((
541 **LT22222-L**: This mode the DI1 is used as a counting pin.
542 )))
543
544 (((
545 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.
546
547 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
548 |**Size(bytes)**|**4**|**4**|**1**|**1**|**1**
549 |Value|COUNT1|AVI1 Counting|DIDORO*|(((
550 Reserve
551
552
553 )))|MOD
554 )))
555
556
557 (((
558 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
559
560 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
561 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
562 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
563 )))
564
565
566 * RO is for relay. ROx=1 : close，ROx=0 always open.
567 * FIRST: Indicate this is the first packet after join network.
568 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
569
570 (((
571 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
572 )))
573
574 (((
575
576
577 **To use this mode, please run:**
578 )))
579
580 (% class="box infomessage" %)
581 (((
582 (((
583 (((
584 **AT+MOD=4**
585 )))
586
587 (((
588 **ATZ**
589 )))
590 )))
591 )))
592
593
594 (((
595 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
596 )))
597
598 (((
599
600
601 **Plus below command for AVI1 Counting:**
602
603
604 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
605
606 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
607
608 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
609
610 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
611 )))
612
613
614 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
615
616
617 **LT22222-L**: This mode the DI1 is used as a counting pin.
618
619 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
620 |**Size(bytes)**|**2**|**2**|**2**|**2**|**1**|**1**|**1**
621 |Value|(((
622 AVI1
623 voltage
624 )))|(((
625 AVI2
626 voltage
627 )))|(((
628 ACI1
629 Current
630 )))|COUNT1|DIDORO*|(((
631 Reserve
632 )))|MOD
633
634 (((
635
636
637 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
638
639 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
640 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
641 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
642 )))
643
644 * RO is for relay. ROx=1 : close，ROx=0 always open.
645 * FIRST: Indicate this is the first packet after join network.
646 * (((
647 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
648 )))
649
650 (((
651 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
652 )))
653
654 (((
655
656
657 **To use this mode, please run:**
658 )))
659
660 (% class="box infomessage" %)
661 (((
662 (((
663 (((
664 **AT+MOD=5**
665 )))
666
667 (((
668 **ATZ**
669 )))
670 )))
671 )))
672
673 (((
674 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
675 )))
676
677
678 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
679
680
681 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
682
683 For example, if user has configured below commands:
684
685 * **AT+MOD=1 ** **~-~->**  The normal working mode
686 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
687
688 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
689
690 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
691 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.**
692
693 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
694
695
696 (% style="color:#4f81bd" %)**Trigger base on voltage**:
697
698 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
699
700
701 **Example:**
702
703 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)
704
705 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
706
707
708
709 (% style="color:#4f81bd" %)**Trigger base on current**:
710
711 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
712
713
714 **Example:**
715
716 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
717
718
719
720 (% style="color:#4f81bd" %)**Trigger base on DI status**:
721
722 DI status trigger Flag.
723
724 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
725
726
727 **Example:**
728
729 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
730
731
732 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
733
734 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
735
736 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
737
738 AA: Code for this downlink Command:
739
740 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
741
742 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
743
744 yy2 yy2: AC1 or AV1 high limit.
745
746 yy3 yy3: AC2 or AV2 low limit.
747
748 Yy4 yy4: AC2 or AV2 high limit.
749
750
751 **Example1**: AA 00 13 88 00 00 00 00 00 00
752
753 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
754
755
756 **Example2**: AA 02 01 00
757
758 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
759
760
761
762 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
763
764 MOD6 Payload : total 11 bytes payload
765
766 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
767 |**Size(bytes)**|**1**|**1**|**1**|**6**|**1**|**1**
768 |Value|(((
769 TRI_A
770 FLAG
771 )))|(((
772 TRI_A
773 Status
774 )))|(((
775 TRI_DI
776 FLAG+STA
777 )))|Reserve|Enable/Disable MOD6|(((
778 MOD
779 (6)
780 )))
781
782 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
783
784 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
785 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
786 |(((
787 AV1_
788 LOW
789 )))|(((
790 AV1_
791 HIGH
792 )))|(((
793 AV2_
794 LOW
795 )))|(((
796 AV2_
797 HIGH
798 )))|(((
799 AC1_
800 LOW
801 )))|(((
802 AC1_
803 HIGH
804 )))|(((
805 AC2_
806 LOW
807 )))|(((
808 AC2_
809 HIGH
810 )))
811
812 * Each bits shows if the corresponding trigger has been configured.
813
814 **Example:**
815
816 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
817
818
819 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
820
821 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
822 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
823 |(((
824 AV1_
825 LOW
826 )))|(((
827 AV1_
828 HIGH
829 )))|(((
830 AV2_
831 LOW
832 )))|(((
833 AV2_
834 HIGH
835 )))|(((
836 AC1_
837 LOW
838 )))|(((
839 AC1_
840 HIGH
841 )))|(((
842 AC2_
843 LOW
844 )))|(((
845 AC2_
846 HIGH
847 )))
848
849 * Each bits shows which status has been trigger on this uplink.
850
851 **Example:**
852
853 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
854
855
856 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
857
858 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
859 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
860 |N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
861
862 * Each bits shows which status has been trigger on this uplink.
863
864 **Example:**
865
866 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
867
868 00000101: Means both DI1 and DI2 trigger are enabled.
869
870
871 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
872
873 Downlink command to poll MOD6 status:
874
875 **AB 06**
876
877 When device got this command, it will send the MOD6 payload.
878
879
880 === 3.3.7 Payload Decoder ===
881
882 (((
883
884
885 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
886 )))
887
888
889 == 3.4 ​Configure LT via AT or Downlink ==
890
891
892 (((
893 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
894 )))
895
896 (((
897 (((
898 There are two kinds of Commands:
899 )))
900 )))
901
902 * (% style="color:blue" %)**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]]
903
904 * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
905
906 === 3.4.1 Common Commands ===
907
908
909 (((
910 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]]
911 )))
912
913
914 === 3.4.2 Sensor related commands ===
915
916 ==== 3.4.2.1 Set Transmit Interval ====
917
918
919 Set device uplink interval.
920
921 * (% style="color:#037691" %)**AT Command:**
922
923 (% style="color:blue" %)**AT+TDC=N **
924
925
926 **Example: **AT+TDC=30000. Means set interval to 30 seconds
927
928
929 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
930
931 (% style="color:blue" %)**0x01 aa bb cc  **(%%)** ~/~/ Same as AT+TDC=0x(aa bb cc)**
932
933
934
935 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
936
937
938 Set work mode.
939
940 * (% style="color:#037691" %)**AT Command:**
941
942 (% style="color:blue" %)**AT+MOD=N  **
943
944
945 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
946
947
948 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
949
950 (% style="color:blue" %)**0x0A aa  **(%%)** ** ~/~/ Same as AT+MOD=aa
951
952
953
954 ==== 3.4.2.3 Poll an uplink ====
955
956
957 * (% style="color:#037691" %)**AT Command:**
958
959 There is no AT Command to poll uplink
960
961
962 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
963
964 (% style="color:blue" %)**0x08 FF  **(%%)** **~/~/ Poll an uplink
965
966
967 **Example**: 0x08FF, ask device to send an Uplink
968
969
970
971 ==== 3.4.2.4 Enable Trigger Mode ====
972
973
974 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
975
976 * (% style="color:#037691" %)**AT Command:**
977
978 (% style="color:blue" %)**AT+ADDMOD6=1 or 0**
979
980 (% style="color:red" %)**1:** (%%)Enable Trigger Mode
981
982 (% style="color:red" %)**0: **(%%)Disable Trigger Mode
983
984
985 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
986
987 (% style="color:blue" %)**0x0A 06 aa    **(%%) ~/~/ Same as AT+ADDMOD6=aa
988
989
990
991 ==== 3.4.2.5 Poll trigger settings ====
992
993
994 Poll trigger settings,
995
996 * (% style="color:#037691" %)**AT Command:**
997
998 There is no AT Command for this feature.
999
1000
1001 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
1002
1003 (% style="color:blue" %)**0xAB 06  ** (%%) ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
1004
1005
1006
1007 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
1008
1009
1010 Enable Disable DI1/DI2/DI2 as trigger,
1011
1012 * (% style="color:#037691" %)**AT Command:**
1013
1014 (% style="color:blue" %)**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
1015
1016
1017 **Example:**
1018
1019 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
1020
1021 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
1022
1023 (% style="color:blue" %)**0xAA 02 aa bb   ** (%%) ~/~/ Same as AT+DTRI=aa,bb
1024
1025
1026
1027 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
1028
1029
1030 Set DI1 or DI3(for LT-33222-L) trigger.
1031
1032 * (% style="color:#037691" %)**AT Command:**
1033
1034 (% style="color:blue" %)**AT+TRIG1=a,b**
1035
1036 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
1037
1038 (% style="color:red" %)**b :** (%%)delay timing.
1039
1040
1041 **Example:**
1042
1043 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
1044
1045
1046 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
1047
1048 (% style="color:blue" %)**0x09 01 aa bb cc    ** (%%) ~/~/ same as AT+TRIG1=aa,0x(bb cc)
1049
1050
1051
1052 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
1053
1054
1055 Set DI2 trigger.
1056
1057 * (% style="color:#037691" %)**AT Command:**
1058
1059 (% style="color:blue" %)**AT+TRIG2=a,b**
1060
1061 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
1062
1063 (% style="color:red" %)**b :** (%%)delay timing.
1064
1065
1066 **Example:**
1067
1068 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
1069
1070
1071 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
1072
1073 (% style="color:blue" %)**0x09 02 aa bb cc   ** (%%)~/~/ same as AT+TRIG2=aa,0x(bb cc)
1074
1075
1076
1077 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
1078
1079
1080 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1081
1082 * (% style="color:#037691" %)**AT Command**
1083
1084 (% style="color:blue" %)**AT+ACLIM**
1085
1086
1087 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
1088
1089 (% style="color:blue" %)**0x AA 01 aa bb cc dd ee ff gg hh        ** (%%) ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1090
1091
1092
1093 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1094
1095
1096 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1097
1098 * (% style="color:#037691" %)**AT Command**
1099
1100 (% style="color:blue" %)**AT+AVLIM    **(%%)** See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1101
1102
1103 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
1104
1105 (% style="color:blue" %)**0x AA 00 aa bb cc dd ee ff gg hh    ** (%%) ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1106
1107
1108
1109 ==== 3.4.2.11 Trigger – Set minimum interval ====
1110
1111
1112 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
1113
1114 * (% style="color:#037691" %)**AT Command**
1115
1116 (% style="color:blue" %)**AT+ATDC=5        ** (%%)Device won't response the second trigger within 5 minute after the first trigger.
1117
1118
1119 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
1120
1121 (% style="color:blue" %)**0x AC aa bb   **(%%) ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
1122
1123 (((
1124
1125
1126 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
1127 )))
1128
1129
1130
1131 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1132
1133
1134 * (% style="color:#037691" %)**AT Command**
1135
1136 There is no AT Command to control Digital Output
1137
1138
1139 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1140 * (% style="color:blue" %)**0x02 aa bb cc     ** (%%)~/~/ Set DO1/DO2/DO3 output
1141
1142 (((
1143 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1144 )))
1145
1146 (((
1147 01: Low,  00: High ,  11: No action
1148
1149 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1150 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**DO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**DO2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**DO3**
1151 |02  01  00  11|Low|High|No Action
1152 |02  00  11  01|High|No Action|Low
1153 |02  11  01  00|No Action|Low|High
1154 )))
1155
1156
1157 (((
1158 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1159 )))
1160
1161 (((
1162 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1163 )))
1164
1165
1166
1167 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1168
1169
1170 * (% style="color:#037691" %)**AT Command**
1171
1172 There is no AT Command to control Digital Output
1173
1174
1175 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1176
1177 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1178
1179
1180 This is to control the digital output time of DO pin. Include four bytes:
1181
1182 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1183
1184 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1185
1186 01: DO pins will change back to original state after timeout.
1187
1188 00: DO pins will change to an inverter state after timeout 
1189
1190
1191 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1192
1193 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1194 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1195 |0x01|DO1 set to low
1196 |0x00|DO1 set to high
1197 |0x11|DO1 NO Action
1198
1199 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1200
1201 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1202 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1203 |0x01|DO2 set to low
1204 |0x00|DO2 set to high
1205 |0x11|DO2 NO Action
1206
1207 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1208
1209 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1210 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1211 |0x01|DO3 set to low
1212 |0x00|DO3 set to high
1213 |0x11|DO3 NO Action
1214
1215 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:(%%) Latching time. Unit: ms
1216
1217
1218 (% style="color:red" %)**Note: **
1219
1220 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1221
1222 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1223
1224
1225 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1226
1227
1228 **Example payload:**
1229
1230 **~1. A9 01 01 01 01 07 D0**
1231
1232 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1233
1234 **2. A9 01 00 01 11 07 D0**
1235
1236 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1237
1238 **3. A9 00 00 00 00 07 D0**
1239
1240 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1241
1242 **4. A9 00 11 01 00 07 D0**
1243
1244 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
1245
1246
1247
1248 ==== 3.4.2. 14 Relay ~-~- Control Relay Output RO1/RO2 ====
1249
1250
1251 * (% style="color:#037691" %)**AT Command:**
1252
1253 There is no AT Command to control Relay Output
1254
1255
1256 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1257
1258 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1259
1260
1261 (((
1262 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1263 )))
1264
1265 (((
1266 01: Close ,  00: Open , 11: No action
1267
1268 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1269 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO2**
1270 |03  00  11|Open|No Action
1271 |03  01  11|Close|No Action
1272 |03  11  00|No Action|Open
1273 |03  11  01|No Action|Close
1274 |03  00  00|Open|Open
1275 |03  01  01|Close|Close
1276 |03  01  00|Close|Open
1277 |03  00  01|Open|Close
1278 )))
1279
1280 (((
1281
1282 )))
1283
1284 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1285
1286
1287
1288 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1289
1290
1291 * (% style="color:#037691" %)**AT Command:**
1292
1293 There is no AT Command to control Relay Output
1294
1295
1296 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1297
1298 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1299
1300
1301 This is to control the relay output time of relay. Include four bytes:
1302
1303 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1304
1305 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1306
1307 01: Relays will change back to original state after timeout.
1308
1309 00: Relays will change to an inverter state after timeout
1310
1311
1312 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1313
1314 [[image:image-20221008095908-1.png||height="364" width="564"]]
1315
1316
1317 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1318
1319
1320 (% style="color:red" %)**Note:**
1321
1322 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1323
1324 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1325
1326
1327 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1328
1329
1330 **Example payload:**
1331
1332 **~1. 05 01 11 07 D0**
1333
1334 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1335
1336 **2. 05 01 10 07 D0**
1337
1338 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1339
1340 **3. 05 00 01 07 D0**
1341
1342 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1343
1344 **4. 05 00 00 07 D0**
1345
1346 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1347
1348
1349
1350 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1351
1352
1353 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1354
1355 * (% style="color:#037691" %)**AT Command:**
1356
1357 (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1358
1359
1360 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1361
1362 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1363
1364
1365
1366 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1367
1368
1369 * (% style="color:#037691" %)**AT Command:**
1370
1371 (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1372
1373 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1374
1375 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1376
1377
1378 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1379
1380 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1381
1382
1383
1384 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1385
1386
1387 Clear counting for counting mode
1388
1389 * (% style="color:#037691" %)**AT Command:**
1390
1391 (% style="color:blue" %)**AT+CLRCOUNT **(%%) ~/~/ clear all counting
1392
1393
1394 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1395
1396 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1397
1398
1399
1400 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1401
1402
1403 * (% style="color:#037691" %)**AT Command:**
1404
1405 (% style="color:blue" %)**AT+COUTIME=60  **(%%)~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1406
1407
1408 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1409
1410 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1411
1412 (((
1413 range: aa bb cc:0 to 16777215,  (unit:second)
1414 )))
1415
1416
1417
1418 ==== 3.4.2.20 Reset save RO DO state ====
1419
1420
1421 * (% style="color:#037691" %)**AT Command:**
1422
1423 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1424
1425 (% style="color:blue" %)**AT+RODORESET=0    **(%%)~/~/ After the device is reset, the previously saved RODO state (only MOD2 to MOD5) is read, and its state is not changed when it is reconnected to the network.
1426
1427
1428 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1429
1430 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1431
1432
1433
1434 ==== 3.4.2.21 Encrypted payload ====
1435
1436
1437 * (% style="color:#037691" %)**AT Command:**
1438
1439 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1440
1441 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1442
1443
1444
1445 ==== 3.4.2.22 Get sensor value ====
1446
1447
1448 * (% style="color:#037691" %)**AT Command:**
1449
1450 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1451
1452 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1453
1454
1455
1456 ==== 3.4.2.23 Resets the downlink packet count ====
1457
1458
1459 * (% style="color:#037691" %)**AT Command:**
1460
1461 (% style="color:blue" %)**AT+DISFCNTCHECK=0   **(%%)~/~/ When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node will no longer receive downlink packets (default)
1462
1463 (% style="color:blue" %)**AT+DISFCNTCHECK=1   **(%%)~/~/ When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node resets the downlink packet count and keeps it consistent with the server downlink packet count.
1464
1465
1466
1467 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1468
1469
1470 * (% style="color:#037691" %)**AT Command:**
1471
1472 (% style="color:blue" %)**AT+DISMACANS=0**   (%%) ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of 11 bytes (DR0 of US915, DR2 of AS923, DR2 of AU195), the node will send a packet with a payload of 00 and a port of 4. (default)
1473
1474 (% style="color:blue" %)**AT+DISMACANS=1**  (%%) ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of the DR, the node will ignore the MACANS and not reply, and only upload the payload part.
1475
1476
1477 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1478
1479 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1480
1481
1482
1483 ==== 3.4.2.25 Copy downlink to uplink ====
1484
1485
1486 * (% style="color:#037691" %)**AT Command**(%%)**:**
1487
1488 (% style="color:blue" %)**AT+RPL=5**   (%%) ~/~/ After receiving the package from the server, it will immediately upload the content of the package to the server, the port number is 100.
1489
1490 Example：**aa xx xx xx xx**         ~/~/ aa indicates whether the configuration has changed, 00 is yes, 01 is no; xx xx xx xx are the bytes sent.
1491
1492
1493 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173747-6.png?width=1124&height=165&rev=1.1||alt="image-20220823173747-6.png"]]
1494
1495 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1496
1497
1498
1499 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173833-7.png?width=1124&height=149&rev=1.1||alt="image-20220823173833-7.png"]]
1500
1501 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1502
1503
1504
1505 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1506
1507
1508 * (((
1509 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1510
1511 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1512
1513
1514 )))
1515
1516 **Example：**
1517
1518 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173929-8.png?width=1205&height=76&rev=1.1||alt="image-20220823173929-8.png"]]
1519
1520
1521 == 3.5 Integrate with Mydevice ==
1522
1523
1524 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:
1525
1526 (((
1527 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1528 )))
1529
1530 (((
1531 (% 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:
1532
1533
1534 )))
1535
1536 [[image:image-20220719105525-1.png||height="377" width="677"]]
1537
1538
1539
1540 [[image:image-20220719110247-2.png||height="388" width="683"]]
1541
1542
1543 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1544
1545 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L) and add DevEUI.(% style="display:none" %)
1546
1547 Search under The things network
1548
1549 [[image:1653356838789-523.png||height="337" width="740"]]
1550
1551
1552
1553 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1554
1555 [[image:image-20220524094909-1.png||height="335" width="729"]]
1556
1557
1558 [[image:image-20220524094909-2.png||height="337" width="729"]]
1559
1560
1561 [[image:image-20220524094909-3.png||height="338" width="727"]]
1562
1563
1564 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1565
1566
1567 [[image:image-20220524094909-5.png||height="341" width="734"]]
1568
1569
1570 == 3.6 Interface Detail ==
1571
1572 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1573
1574
1575 Support NPN Type sensor
1576
1577 [[image:1653356991268-289.png]]
1578
1579
1580 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1581
1582
1583 (((
1584 The DI port of LT-22222-L can support NPN or PNP output sensor.
1585 )))
1586
1587 (((
1588 (((
1589 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.
1590
1591
1592 )))
1593 )))
1594
1595 [[image:1653357170703-587.png]]
1596
1597 (((
1598 (((
1599 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1600 )))
1601 )))
1602
1603 (((
1604
1605 )))
1606
1607 (((
1608 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1609 )))
1610
1611 (((
1612 This type of sensor will output a low signal GND when active.
1613 )))
1614
1615 * (((
1616 Connect sensor's output to DI1-
1617 )))
1618 * (((
1619 Connect sensor's VCC to DI1+.
1620 )))
1621
1622 (((
1623 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1624 )))
1625
1626 (((
1627 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1628 )))
1629
1630 (((
1631 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.
1632 )))
1633
1634 (((
1635
1636 )))
1637
1638 (((
1639 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1640 )))
1641
1642 (((
1643 This type of sensor will output a high signal (example 24v) when active.
1644 )))
1645
1646 * (((
1647 Connect sensor's output to DI1+
1648 )))
1649 * (((
1650 Connect sensor's GND DI1-.
1651 )))
1652
1653 (((
1654 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1655 )))
1656
1657 (((
1658 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1659 )))
1660
1661 (((
1662 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.
1663 )))
1664
1665 (((
1666
1667 )))
1668
1669 (((
1670 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1671 )))
1672
1673 (((
1674 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1675 )))
1676
1677 * (((
1678 Connect sensor's output to DI1+ with a serial 50K resistor
1679 )))
1680 * (((
1681 Connect sensor's GND DI1-.
1682 )))
1683
1684 (((
1685 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1686 )))
1687
1688 (((
1689 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1690 )))
1691
1692 (((
1693 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.
1694 )))
1695
1696
1697 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1698
1699
1700 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1701
1702 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1703
1704 [[image:1653357531600-905.png]]
1705
1706
1707 === 3.6.4 Analog Input Interface ===
1708
1709
1710 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:
1711
1712
1713 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1714
1715 [[image:1653357592296-182.png]]
1716
1717 Example to connect a 4~~20mA sensor
1718
1719 We take the wind speed sensor as an example for reference only.
1720
1721
1722 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1723
1724 (% style="color:red" %)**Red:  12~~24v**
1725
1726 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1727
1728 **Black:  GND**
1729
1730 **Connection diagram:**
1731
1732 [[image:1653357640609-758.png]]
1733
1734 [[image:1653357648330-671.png||height="155" width="733"]]
1735
1736
1737 Example connected to a regulated power supply to measure voltage
1738
1739 [[image:image-20230608101532-1.png||height="606" width="447"]]
1740
1741 [[image:image-20230608101608-2.jpeg||height="379" width="284"]]
1742
1743 [[image:image-20230608101722-3.png||height="102" width="1139"]]
1744
1745
1746 (% style="color:blue; font-weight:bold" %)**Specifications of the regulated power**(%%) (% style="color:blue" %)**:**
1747
1748 (% style="color:red" %)**Red:  12~~24v**
1749
1750 **Black:  GND**
1751
1752
1753 === 3.6.5 Relay Output ===
1754
1755
1756 (((
1757 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:
1758
1759 **Note**: RO pins go to Open(NO) when device is power off.
1760 )))
1761
1762 [[image:image-20220524100215-9.png]]
1763
1764
1765 [[image:image-20220524100215-10.png||height="382" width="723"]]
1766
1767
1768 == 3.7 LEDs Indicators ==
1769
1770
1771 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1772 |(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**LEDs**|(% style="background-color:#d9e2f3; color:#0070c0; width:470px" %)**Feature**
1773 |**PWR**|Always on if there is power
1774 |**SYS**|(((
1775 After device is powered on, the SYS will **fast blink in GREEN** for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be **on GREEN for 5 seconds. **SYS will **blink Blue** on every upload and **blink Green** once receive a downlink message.
1776 )))
1777 |**TX**|(((
1778 (((
1779 Device boot: TX blinks 5 times.
1780 )))
1781
1782 (((
1783 Successful join network: TX ON for 5 seconds.
1784 )))
1785
1786 (((
1787 Transmit a LoRa packet: TX blinks once
1788 )))
1789 )))
1790 |**RX**|RX blinks once when receive a packet.
1791 |**DO1**|
1792 |**DO2**|
1793 |**DO3**|
1794 |**DI2**|(((
1795 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1796 )))
1797 |**DI2**|(((
1798 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1799 )))
1800 |**DI2**|(((
1801 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1802 )))
1803 |**RO1**|
1804 |**RO2**|
1805
1806 = 4. Use AT Command =
1807
1808 == 4.1 Access AT Command ==
1809
1810
1811 (((
1812 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.
1813 )))
1814
1815 (((
1816
1817 )))
1818
1819 [[image:1653358238933-385.png]]
1820
1821
1822 (((
1823 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:
1824 )))
1825
1826 [[image:1653358355238-883.png]]
1827
1828
1829 (((
1830 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/]]
1831 )))
1832
1833 (((
1834 AT+<CMD>?        : Help on <CMD>
1835 )))
1836
1837 (((
1838 AT+<CMD>         : Run <CMD>
1839 )))
1840
1841 (((
1842 AT+<CMD>=<value> : Set the value
1843 )))
1844
1845 (((
1846 AT+<CMD>=?       :  Get the value
1847 )))
1848
1849 (((
1850 ATZ: Trig a reset of the MCU
1851 )))
1852
1853 (((
1854 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1855 )))
1856
1857 (((
1858 AT+DEUI: Get or Set the Device EUI
1859 )))
1860
1861 (((
1862 AT+DADDR: Get or Set the Device Address
1863 )))
1864
1865 (((
1866 AT+APPKEY: Get or Set the Application Key
1867 )))
1868
1869 (((
1870 AT+NWKSKEY: Get or Set the Network Session Key
1871 )))
1872
1873 (((
1874 AT+APPSKEY:  Get or Set the Application Session Key
1875 )))
1876
1877 (((
1878 AT+APPEUI:  Get or Set the Application EUI
1879 )))
1880
1881 (((
1882 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1883 )))
1884
1885 (((
1886 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1887 )))
1888
1889 (((
1890 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1891 )))
1892
1893 (((
1894 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1895 )))
1896
1897 (((
1898 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1899 )))
1900
1901 (((
1902 AT+RX2FQ: Get or Set the Rx2 window frequency
1903 )))
1904
1905 (((
1906 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1907 )))
1908
1909 (((
1910 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1911 )))
1912
1913 (((
1914 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1915 )))
1916
1917 (((
1918 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1919 )))
1920
1921 (((
1922 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1923 )))
1924
1925 (((
1926 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1927 )))
1928
1929 (((
1930 AT+NWKID: Get or Set the Network ID
1931 )))
1932
1933 (((
1934 AT+FCU: Get or Set the Frame Counter Uplink
1935 )))
1936
1937 (((
1938 AT+FCD: Get or Set the Frame Counter Downlink
1939 )))
1940
1941 (((
1942 AT+CLASS: Get or Set the Device Class
1943 )))
1944
1945 (((
1946 AT+JOIN: Join network
1947 )))
1948
1949 (((
1950 AT+NJS: Get OTAA Join Status
1951 )))
1952
1953 (((
1954 AT+SENDB: Send hexadecimal data along with the application port
1955 )))
1956
1957 (((
1958 AT+SEND: Send text data along with the application port
1959 )))
1960
1961 (((
1962 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1963 )))
1964
1965 (((
1966 AT+RECV: Print last received data in raw format
1967 )))
1968
1969 (((
1970 AT+VER:  Get current image version and Frequency Band
1971 )))
1972
1973 (((
1974 AT+CFM: Get or Set the confirmation mode (0-1)
1975 )))
1976
1977 (((
1978 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1979 )))
1980
1981 (((
1982 AT+SNR: Get the SNR of the last received packet
1983 )))
1984
1985 (((
1986 AT+RSSI: Get the RSSI of the last received packet
1987 )))
1988
1989 (((
1990 AT+TDC: Get or set the application data transmission interval in ms
1991 )))
1992
1993 (((
1994 AT+PORT: Get or set the application port
1995 )))
1996
1997 (((
1998 AT+DISAT: Disable AT commands
1999 )))
2000
2001 (((
2002 AT+PWORD: Set password, max 9 digits
2003 )))
2004
2005 (((
2006 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
2007 )))
2008
2009 (((
2010 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
2011 )))
2012
2013 (((
2014 AT+CFG: Print all settings
2015 )))
2016
2017
2018 == 4.2 Common AT Command Sequence ==
2019
2020 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
2021
2022 (((
2023
2024
2025 (((
2026 (% style="color:blue" %)**If device has not joined network yet:**
2027 )))
2028 )))
2029
2030 (((
2031 (% style="background-color:#dcdcdc" %)**123456**
2032 )))
2033
2034 (((
2035 (% style="background-color:#dcdcdc" %)**AT+FDR**
2036 )))
2037
2038 (((
2039 (% style="background-color:#dcdcdc" %)**123456**
2040 )))
2041
2042 (((
2043 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
2044 )))
2045
2046 (((
2047 (% style="background-color:#dcdcdc" %)**ATZ**
2048 )))
2049
2050
2051 (((
2052 (% style="color:blue" %)**If device already joined network:**
2053 )))
2054
2055 (((
2056 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
2057 )))
2058
2059 (((
2060 (% style="background-color:#dcdcdc" %)**ATZ**
2061 )))
2062
2063
2064 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
2065
2066 (((
2067
2068
2069 (((
2070 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
2071 )))
2072 )))
2073
2074 (((
2075 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
2076 )))
2077
2078 (((
2079 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
2080 )))
2081
2082 (((
2083 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
2084 )))
2085
2086 (((
2087 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
2088 )))
2089
2090 (((
2091 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
2092 )))
2093
2094 (((
2095 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
2096 )))
2097
2098 (((
2099 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
2100 )))
2101
2102 (((
2103 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
2104 )))
2105
2106 (((
2107 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
2108 )))
2109
2110 (((
2111 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
2112 )))
2113
2114 (((
2115 (% 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.
2116 )))
2117
2118 (((
2119 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2120
2121
2122 )))
2123
2124 (((
2125 (% style="color:red" %)**Note:**
2126 )))
2127
2128 (((
2129 **~1. Make sure the device is set to ABP mode in the IoT Server.**
2130
2131 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
2132
2133 **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?
2134 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2135
2136 **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.**
2137
2138
2139 )))
2140
2141 (((
2142 [[image:1653359097980-169.png||height="188" width="729"]]
2143 )))
2144
2145 (((
2146
2147 )))
2148
2149 === 4.2.3 Change to Class A ===
2150
2151
2152 (((
2153 (% style="color:blue" %)**If sensor JOINED:**
2154
2155 (% style="background-color:#dcdcdc" %)**AT+CLASS=A
2156 ATZ**
2157 )))
2158
2159
2160 = 5. Case Study =
2161
2162 == 5.1 Counting how many objects pass in Flow Line ==
2163
2164
2165 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
2166
2167
2168 = 6. FAQ =
2169
2170 == 6.1 How to upgrade the image? ==
2171
2172
2173 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2174
2175 * Support new features
2176 * For bug fix
2177 * Change LoRaWAN bands.
2178
2179 Below shows the hardware connection for how to upload an image to the LT:
2180
2181 [[image:1653359603330-121.png]]
2182
2183
2184 (((
2185 (% 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]].
2186 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:https://www.dropbox.com/sh/g99v0fxcltn9r1y/AADKXQ2v5ZT-S3sxdmbvE7UAa/LT-22222-L/image?dl=0&subfolder_nav_tracking=1]].
2187 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2188
2189
2190 (((
2191 (% style="color:blue" %)**For LT-22222-L**(%%):
2192 Hold down the PRO button and then momentarily press the RST reset button and the (% style="color:red" %)**DO1 led**(%%) will change from OFF to ON. When (% style="color:red" %)**DO1 LED**(%%) is on, it means the device is in download mode.
2193 )))
2194
2195
2196 )))
2197
2198 [[image:image-20220524103407-12.png]]
2199
2200
2201 [[image:image-20220524103429-13.png]]
2202
2203
2204 [[image:image-20220524104033-15.png]]
2205
2206
2207 (% 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:
2208
2209
2210 [[image:1653360054704-518.png||height="186" width="745"]]
2211
2212
2213 (((
2214 (((
2215 == 6.2 How to change the LoRa Frequency Bands/Region? ==
2216
2217
2218 )))
2219 )))
2220
2221 (((
2222 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2223 )))
2224
2225 (((
2226
2227
2228 == 6.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2229
2230
2231 )))
2232
2233 (((
2234 (((
2235 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2236 )))
2237 )))
2238
2239 (((
2240 (((
2241 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2242
2243
2244 )))
2245 )))
2246
2247 (((
2248 (% style="color:blue" %)**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.
2249
2250
2251 )))
2252
2253 (((
2254 [[image:1653360231087-571.png||height="401" width="727"]]
2255
2256
2257 )))
2258
2259 (((
2260 (% 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.**
2261 )))
2262
2263
2264
2265 (((
2266 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2267
2268
2269 )))
2270
2271 (((
2272 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2273 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2274 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2275 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2276 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2277 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2278 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2279 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2280 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2281 )))
2282
2283
2284 (((
2285 As shown in below:
2286 )))
2287
2288 [[image:1653360498588-932.png||height="485" width="726"]]
2289
2290
2291 == 6.4 How to change the uplink interval？ ==
2292
2293
2294 Please see this link: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/]]
2295
2296
2297 == 6.5 Can I see counting event in Serial? ==
2298
2299
2300 (((
2301 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.
2302
2303
2304 == 6.6 Can i use point to point communication for LT-22222-L? ==
2305
2306
2307 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]  ，this is [[firmware>>https://github.com/dragino/LT-22222-L/releases]].
2308
2309
2310 )))
2311
2312 (((
2313 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2314
2315
2316 If the device is not shut down, but directly powered off.
2317
2318 It will default that this is a power-off state.
2319
2320 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2321
2322 After restart, the status before power failure will be read from flash.
2323
2324
2325 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2326
2327
2328 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2329
2330
2331 [[image:image-20221006170630-1.png||height="610" width="945"]]
2332
2333
2334 == 6.9 Can LT22222-L save RO state? ==
2335
2336
2337 Firmware version needs to be no less than 1.6.0.
2338
2339
2340 = 7. Trouble Shooting =
2341 )))
2342
2343 (((
2344 (((
2345 == 7.1 Downlink doesn't work, how to solve it? ==
2346
2347
2348 )))
2349 )))
2350
2351 (((
2352 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2353 )))
2354
2355 (((
2356
2357
2358 == 7.2 Have trouble to upload image. ==
2359
2360
2361 )))
2362
2363 (((
2364 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2365 )))
2366
2367 (((
2368
2369
2370 == 7.3 Why I can't join TTN in US915 /AU915 bands? ==
2371
2372
2373 )))
2374
2375 (((
2376 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2377 )))
2378
2379
2380 = 8. Order Info =
2381
2382
2383 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2384
2385 (% style="color:#4f81bd" %)**XXX:**
2386
2387 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2388 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2389 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2390 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2391 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2392 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2393 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2394 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2395 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2396
2397 = 9. Packing Info =
2398
2399
2400 **Package Includes**:
2401
2402 * LT-22222-L I/O Controller x 1
2403 * Stick Antenna for LoRa RF part x 1
2404 * Bracket for controller x1
2405 * Program cable x 1
2406
2407 **Dimension and weight**:
2408
2409 * Device Size: 13.5 x 7 x 3 cm
2410 * Device Weight: 105g
2411 * Package Size / pcs : 14.5 x 8 x 5 cm
2412 * Weight / pcs : 170g
2413
2414 = 10. Support =
2415
2416
2417 * (((
2418 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.
2419 )))
2420 * (((
2421 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.cc>>mailto:Support@dragino.cc]]
2422
2423
2424
2425 )))
2426
2427 = 11. Reference​​​​​ =
2428
2429
2430 * 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]]
2431 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2432 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]