Version 127.2 by Xiaoling on 2023/08/21 15:27
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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" cellspacing="4" 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:266px" %)**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 (% 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.
303
304
305 )))
306
307 [[image:1653298044601-602.png||height="405" width="709"]]
308
309
310 == 3.3 Uplink Payload ==
311
312
313 There are five working modes + one interrupt mode on LT for different type application:
314
315 * (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
316
317 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
318
319 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
320
321 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
322
323 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
324
325 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
326
327
328
329 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
330
331
332 (((
333 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
334
335 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
336 |(% 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**
337 |Value|(((
338 AVI1 voltage
339 )))|(((
340 AVI2 voltage
341 )))|(((
342 ACI1 Current
343 )))|(((
344 ACI2 Current
345 )))|DIDORO*|(((
346 Reserve
347 )))|MOD
348 )))
349
350 (((
351 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
352
353 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
354 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
355 |RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
356 )))
357
358 * RO is for relay. ROx=1 : close, ROx=0 always open.
359 * DI is for digital input. DIx=1: high or float, DIx=0: low.
360 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
361
362 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
363
364 For example if payload is: [[image:image-20220523175847-2.png]]
365
366
367 **The value for the interface is:  **
368
369 AVI1 channel voltage is 0x04AB/1000=1195(DEC)/1000=1.195V
370
371 AVI2 channel voltage is 0x04AC/1000=1.196V
372
373 ACI1 channel current is 0x1310/1000=4.880mA
374
375 ACI2 channel current is 0x1300/1000=4.864mA
376
377 The last byte 0xAA= 10101010(B) means
378
379 * [1] RO1 relay channel is close and the RO1 LED is ON.
380 * [0] RO2 relay channel is open and RO2 LED is OFF;
381
382 **LT22222-L:**
383
384 * [1] DI2 channel is high input and DI2 LED is ON;
385 * [0] DI1 channel is low input;
386
387 * [0] DO3 channel output state
388 ** DO3 is float in case no load between DO3 and V+.;
389 ** DO3 is high in case there is load between DO3 and V+.
390 ** DO3 LED is off in both case
391 * [1] DO2 channel output is low and DO2 LED is ON.
392 * [0] DO1 channel output state
393 ** DO1 is float in case no load between DO1 and V+.;
394 ** DO1 is high in case there is load between DO1 and V+.
395 ** DO1 LED is off in both case
396
397
398
399 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
400
401
402 (((
403 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
404 )))
405
406 (((
407 Total : 11 bytes payload
408
409 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
410 |(% 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**
411 |Value|COUNT1|COUNT2 |DIDORO*|(((
412 Reserve
413 )))|MOD
414 )))
415
416 (((
417 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
418
419 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
420 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
421 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
422
423 RO is for relay. ROx=1 : close , ROx=0 always open.
424 )))
425
426 * FIRST: Indicate this is the first packet after join network.
427 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
428
429 (((
430 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
431
432
433 )))
434
435 (((
436 **To use counting mode, please run:**
437 )))
438
439 (((
440 (% class="box infomessage" %)
441 (((
442 **AT+MOD=2**
443
444 **ATZ**
445 )))
446 )))
447
448 (((
449
450
451 (% style="color:#4f81bd" %)**AT Commands for counting:**
452 )))
453
454 (((
455 **For LT22222-L:**
456
457 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
458
459 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
460
461 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
462
463 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
464
465 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
466
467 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
468 )))
469
470
471 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
472
473
474 **LT22222-L**: This mode the DI1 is used as a counting pin.
475
476 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
477 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0" %)**4**|(% 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**
478 |Value|COUNT1|(((
479 ACI1 Current
480 )))|(((
481 ACI2 Current
482 )))|DIDORO*|Reserve|MOD
483
484 (((
485 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
486
487 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
488 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
489 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
490 )))
491
492 * RO is for relay. ROx=1 : close, ROx=0 always open.
493 * FIRST: Indicate this is the first packet after join network.
494 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
495
496 (((
497 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
498 )))
499
500
501 (((
502 **To use counting mode, please run:**
503 )))
504
505 (((
506 (% class="box infomessage" %)
507 (((
508 **AT+MOD=3**
509
510 **ATZ**
511 )))
512 )))
513
514 (((
515 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
516 )))
517
518
519 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
520
521
522 (((
523 **LT22222-L**: This mode the DI1 is used as a counting pin.
524 )))
525
526 (((
527 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.
528
529 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
530 |(% 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**
531 |Value|COUNT1|AVI1 Counting|DIDORO*|(((
532 Reserve
533 )))|MOD
534 )))
535
536 (((
537 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
538
539 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
540 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
541 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
542 )))
543
544 * RO is for relay. ROx=1 : close, ROx=0 always open.
545 * FIRST: Indicate this is the first packet after join network.
546 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
547
548 (((
549 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
550
551
552 )))
553
554 (((
555 **To use this mode, please run:**
556 )))
557
558 (((
559 (% class="box infomessage" %)
560 (((
561 **AT+MOD=4**
562
563 **ATZ**
564 )))
565 )))
566
567 (((
568 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
569 )))
570
571 (((
572 **Plus below command for AVI1 Counting:**
573
574 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
575
576 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
577
578 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
579
580 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
581 )))
582
583
584 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
585
586
587 **LT22222-L**: This mode the DI1 is used as a counting pin.
588
589 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
590 |(% 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**
591 |Value|(((
592 AVI1 voltage
593 )))|(((
594 AVI2 voltage
595 )))|(((
596 ACI1 Current
597 )))|COUNT1|DIDORO*|(((
598 Reserve
599 )))|MOD
600
601 (((
602 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
603
604 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
605 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
606 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
607 )))
608
609 * RO is for relay. ROx=1 : close, ROx=0 always open.
610 * FIRST: Indicate this is the first packet after join network.
611 * (((
612 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
613 )))
614
615 (((
616 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
617 )))
618
619 (((
620 **To use this mode, please run:**
621 )))
622
623 (((
624 (% class="box infomessage" %)
625 (((
626 **AT+MOD=5**
627
628 **ATZ**
629 )))
630 )))
631
632 (((
633 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
634 )))
635
636
637 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
638
639
640 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
641
642 For example, if user has configured below commands:
643
644 * **AT+MOD=1 ** **~-~->**  The normal working mode
645 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
646
647 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
648
649 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
650 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.**
651
652 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
653
654
655 (% style="color:#4f81bd" %)**Trigger base on voltage**:
656
657 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
658
659
660 **Example:**
661
662 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)
663
664 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
665
666
667
668 (% style="color:#4f81bd" %)**Trigger base on current**:
669
670 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
671
672
673 **Example:**
674
675 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
676
677
678
679 (% style="color:#4f81bd" %)**Trigger base on DI status**:
680
681 DI status trigger Flag.
682
683 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
684
685
686 **Example:**
687
688 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
689
690
691 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
692
693 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
694
695 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
696
697 AA: Code for this downlink Command:
698
699 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
700
701 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
702
703 yy2 yy2: AC1 or AV1 high limit.
704
705 yy3 yy3: AC2 or AV2 low limit.
706
707 Yy4 yy4: AC2 or AV2 high limit.
708
709
710 **Example1**: AA 00 13 88 00 00 00 00 00 00
711
712 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
713
714
715 **Example2**: AA 02 01 00
716
717 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
718
719
720
721 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
722
723 MOD6 Payload : total 11 bytes payload
724
725 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
726 |(% style="background-color:#d9e2f3; color:#0070c0; width:60px" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0; width:69px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:69px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:109px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:49px" %)**6**|(% style="background-color:#d9e2f3; color:#0070c0; width:109px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**1**
727 |Value|(((
728 TRI_A FLAG
729 )))|(((
730 TRI_A Status
731 )))|(((
732 TRI_DI FLAG+STA
733 )))|Reserve|Enable/Disable MOD6|(((
734 MOD(6)
735 )))
736
737 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
738
739 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
740 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
741 |(((
742 AV1_LOW
743 )))|(((
744 AV1_HIGH
745 )))|(((
746 AV2_LOW
747 )))|(((
748 AV2_HIGH
749 )))|(((
750 AC1_LOW
751 )))|(((
752 AC1_HIGH
753 )))|(((
754 AC2_LOW
755 )))|(((
756 AC2_HIGH
757 )))
758
759 * Each bits shows if the corresponding trigger has been configured.
760
761 **Example:**
762
763 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
764
765
766 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
767
768 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
769 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
770 |(((
771 AV1_LOW
772 )))|(((
773 AV1_HIGH
774 )))|(((
775 AV2_LOW
776 )))|(((
777 AV2_HIGH
778 )))|(((
779 AC1_LOW
780 )))|(((
781 AC1_HIGH
782 )))|(((
783 AC2_LOW
784 )))|(((
785 AC2_HIGH
786 )))
787
788 * Each bits shows which status has been trigger on this uplink.
789
790 **Example:**
791
792 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
793
794
795 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
796
797 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
798 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
799 |N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
800
801 * Each bits shows which status has been trigger on this uplink.
802
803 **Example:**
804
805 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
806
807 00000101: Means both DI1 and DI2 trigger are enabled.
808
809
810 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
811
812 Downlink command to poll MOD6 status:
813
814 **AB 06**
815
816 When device got this command, it will send the MOD6 payload.
817
818
819 === 3.3.7 Payload Decoder ===
820
821 (((
822
823
824 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
825 )))
826
827
828 == 3.4 ​Configure LT via AT or Downlink ==
829
830
831 (((
832 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
833 )))
834
835 (((
836 (((
837 There are two kinds of Commands:
838 )))
839 )))
840
841 * (% 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]]
842
843 * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
844
845
846
847 === 3.4.1 Common Commands ===
848
849
850 (((
851 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]]
852 )))
853
854
855 === 3.4.2 Sensor related commands ===
856
857 ==== 3.4.2.1 Set Transmit Interval ====
858
859
860 Set device uplink interval.
861
862 * (% style="color:#037691" %)**AT Command:**
863
864 (% style="color:blue" %)**AT+TDC=N **
865
866
867 **Example: **AT+TDC=30000. Means set interval to 30 seconds
868
869
870 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
871
872 (% style="color:blue" %)**0x01 aa bb cc  **(%%)** ~/~/ Same as AT+TDC=0x(aa bb cc)**
873
874
875
876 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
877
878
879 Set work mode.
880
881 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+MOD=N  **
882
883 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
884
885 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
886
887 (% style="color:blue" %)**0x0A aa  **(%%)** ** ~/~/ Same as AT+MOD=aa
888
889
890
891 ==== 3.4.2.3 Poll an uplink ====
892
893
894 * (% style="color:#037691" %)**AT Command:**(%%) There is no AT Command to poll uplink
895
896 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
897
898 (% style="color:blue" %)**0x08 FF  **(%%)** **~/~/ Poll an uplink
899
900 **Example**: 0x08FF, ask device to send an Uplink
901
902
903
904 ==== 3.4.2.4 Enable Trigger Mode ====
905
906
907 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
908
909 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ADDMOD6=1 or 0**
910
911 (% style="color:red" %)**1:** (%%)Enable Trigger Mode
912
913 (% style="color:red" %)**0: **(%%)Disable Trigger Mode
914
915
916 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
917
918 (% style="color:blue" %)**0x0A 06 aa    **(%%) ~/~/ Same as AT+ADDMOD6=aa
919
920
921
922 ==== 3.4.2.5 Poll trigger settings ====
923
924
925 Poll trigger settings
926
927 * (% style="color:#037691" %)**AT Command:**
928
929 There is no AT Command for this feature.
930
931 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
932
933 (% style="color:blue" %)**0xAB 06  ** (%%) ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
934
935
936
937 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
938
939
940 Enable Disable DI1/DI2/DI2 as trigger,
941
942 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
943
944 **Example:** AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
945
946
947 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
948
949 (% style="color:blue" %)**0xAA 02 aa bb   ** (%%) ~/~/ Same as AT+DTRI=aa,bb
950
951
952
953 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
954
955
956 Set DI1 or DI3(for LT-33222-L) trigger.
957
958 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG1=a,b**
959
960 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
961
962 (% style="color:red" %)**b :** (%%)delay timing.
963
964 **Example:** AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
965
966
967 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
968
969 (% style="color:blue" %)**0x09 01 aa bb cc    ** (%%) ~/~/ same as AT+TRIG1=aa,0x(bb cc)
970
971
972
973 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
974
975
976 Set DI2 trigger.
977
978 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG2=a,b**
979
980 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
981
982 (% style="color:red" %)**b :** (%%)delay timing.
983
984 **Example:** AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
985
986
987 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
988
989 (% style="color:blue" %)**0x09 02 aa bb cc   ** (%%)~/~/ same as AT+TRIG2=aa,0x(bb cc)
990
991
992
993 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
994
995
996 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
997
998 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ACLIM**
999
1000 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
1001
1002 (% 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"]]
1003
1004
1005
1006 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1007
1008
1009 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1010
1011 * (% style="color:#037691" %)**AT Command**(%%): (% style="color:blue" %)**AT+AVLIM    **(%%)** See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1012
1013 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
1014
1015 (% 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"]]
1016
1017
1018
1019 ==== 3.4.2.11 Trigger – Set minimum interval ====
1020
1021
1022 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
1023
1024 * (% style="color:#037691" %)**AT Command**(%%): (% style="color:blue" %)**AT+ATDC=5        ** ~/~/ (%%)Device won't response the second trigger within 5 minute after the first trigger.
1025
1026 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
1027
1028 (% style="color:blue" %)**0x AC aa bb   **(%%) ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
1029
1030 (((
1031 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
1032 )))
1033
1034
1035
1036 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1037
1038
1039 * (% style="color:#037691" %)**AT Command**
1040
1041 There is no AT Command to control Digital Output
1042
1043
1044 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1045
1046 (% style="color:blue" %)**0x02 aa bb cc     ** (%%)~/~/ Set DO1/DO2/DO3 output
1047
1048 (((
1049 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1050 )))
1051
1052 (((
1053 01: Low,  00: High ,  11: No action
1054
1055 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1056 |(% 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**
1057 |02  01  00  11|Low|High|No Action
1058 |02  00  11  01|High|No Action|Low
1059 |02  11  01  00|No Action|Low|High
1060 )))
1061
1062 (((
1063 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1064 )))
1065
1066 (((
1067 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1068 )))
1069
1070
1071
1072 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1073
1074
1075 * (% style="color:#037691" %)**AT Command**
1076
1077 There is no AT Command to control Digital Output
1078
1079
1080 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1081
1082 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1083
1084
1085 This is to control the digital output time of DO pin. Include four bytes:
1086
1087 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1088
1089 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1090
1091 01: DO pins will change back to original state after timeout.
1092
1093 00: DO pins will change to an inverter state after timeout 
1094
1095
1096 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1097
1098 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1099 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1100 |0x01|DO1 set to low
1101 |0x00|DO1 set to high
1102 |0x11|DO1 NO Action
1103
1104 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1105
1106 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1107 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1108 |0x01|DO2 set to low
1109 |0x00|DO2 set to high
1110 |0x11|DO2 NO Action
1111
1112 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1113
1114 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1115 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1116 |0x01|DO3 set to low
1117 |0x00|DO3 set to high
1118 |0x11|DO3 NO Action
1119
1120 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:(%%) Latching time. Unit: ms
1121
1122
1123 (% style="color:red" %)**Note: **
1124
1125 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1126
1127 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1128
1129 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1130
1131
1132 **Example payload:**
1133
1134 **~1. A9 01 01 01 01 07 D0**
1135
1136 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1137
1138 **2. A9 01 00 01 11 07 D0**
1139
1140 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1141
1142 **3. A9 00 00 00 00 07 D0**
1143
1144 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1145
1146 **4. A9 00 11 01 00 07 D0**
1147
1148 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
1149
1150
1151
1152 ==== 3.4.2. 14 Relay ~-~- Control Relay Output RO1/RO2 ====
1153
1154
1155 * (% style="color:#037691" %)**AT Command:**
1156
1157 There is no AT Command to control Relay Output
1158
1159
1160 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1161
1162 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1163
1164
1165 (((
1166 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1167 )))
1168
1169 (((
1170 01: Close ,  00: Open , 11: No action
1171
1172 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1173 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO2**
1174 |03  00  11|Open|No Action
1175 |03  01  11|Close|No Action
1176 |03  11  00|No Action|Open
1177 |03  11  01|No Action|Close
1178 |03  00  00|Open|Open
1179 |03  01  01|Close|Close
1180 |03  01  00|Close|Open
1181 |03  00  01|Open|Close
1182 )))
1183
1184 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1185
1186
1187
1188 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1189
1190
1191 * (% style="color:#037691" %)**AT Command:**
1192
1193 There is no AT Command to control Relay Output
1194
1195
1196 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1197
1198 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1199
1200
1201 This is to control the relay output time of relay. Include four bytes:
1202
1203 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1204
1205 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1206
1207 01: Relays will change back to original state after timeout.
1208
1209 00: Relays will change to an inverter state after timeout
1210
1211
1212 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1213
1214 [[image:image-20221008095908-1.png||height="364" width="564"]]
1215
1216
1217 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1218
1219
1220 (% style="color:red" %)**Note:**
1221
1222 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1223
1224 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1225
1226
1227 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1228
1229
1230 **Example payload:**
1231
1232 **~1. 05 01 11 07 D0**
1233
1234 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1235
1236 **2. 05 01 10 07 D0**
1237
1238 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1239
1240 **3. 05 00 01 07 D0**
1241
1242 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1243
1244 **4. 05 00 00 07 D0**
1245
1246 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1247
1248
1249
1250 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1251
1252
1253 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1254
1255 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1256
1257 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1258
1259 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1260
1261
1262
1263 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1264
1265
1266 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1267
1268 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1269
1270 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1271
1272
1273 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1274
1275 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1276
1277
1278
1279 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1280
1281
1282 Clear counting for counting mode
1283
1284 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+CLRCOUNT         **(%%) ~/~/ clear all counting
1285
1286 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1287
1288 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1289
1290
1291
1292 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1293
1294
1295 * (% style="color:#037691" %)**AT Command:**
1296
1297 (% 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)
1298
1299
1300 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1301
1302 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1303
1304 (((
1305 range: aa bb cc:0 to 16777215,  (unit:second)
1306 )))
1307
1308
1309
1310 ==== 3.4.2.20 Reset save RO DO state ====
1311
1312
1313 * (% style="color:#037691" %)**AT Command:**
1314
1315 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1316
1317 (% 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.
1318
1319
1320 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1321
1322 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1323
1324
1325
1326 ==== 3.4.2.21 Encrypted payload ====
1327
1328
1329 * (% style="color:#037691" %)**AT Command:**
1330
1331 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1332
1333 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1334
1335
1336
1337 ==== 3.4.2.22 Get sensor value ====
1338
1339
1340 * (% style="color:#037691" %)**AT Command:**
1341
1342 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1343
1344 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1345
1346
1347
1348 ==== 3.4.2.23 Resets the downlink packet count ====
1349
1350
1351 * (% style="color:#037691" %)**AT Command:**
1352
1353 (% 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)
1354
1355 (% 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.
1356
1357
1358
1359 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1360
1361
1362 * (% style="color:#037691" %)**AT Command:**
1363
1364 (% 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)
1365
1366 (% 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.
1367
1368
1369 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1370
1371 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1372
1373
1374
1375 ==== 3.4.2.25 Copy downlink to uplink ====
1376
1377
1378 * (% style="color:#037691" %)**AT Command**(%%)**:**
1379
1380 (% 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.
1381
1382 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.
1383
1384
1385 [[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"]]
1386
1387 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1388
1389
1390
1391 [[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"]]
1392
1393 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1394
1395
1396
1397 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1398
1399
1400 * (((
1401 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1402
1403 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1404
1405
1406 )))
1407
1408 **Example：**
1409
1410 [[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"]]
1411
1412
1413 == 3.5 Integrate with Mydevice ==
1414
1415
1416 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:
1417
1418 (((
1419 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1420 )))
1421
1422 (((
1423 (% 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:
1424
1425
1426 )))
1427
1428 [[image:image-20220719105525-1.png||height="377" width="677"]]
1429
1430
1431
1432 [[image:image-20220719110247-2.png||height="388" width="683"]]
1433
1434
1435 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1436
1437 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L) and add DevEUI.(% style="display:none" %)
1438
1439 Search under The things network
1440
1441 [[image:1653356838789-523.png||height="337" width="740"]]
1442
1443
1444 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1445
1446 [[image:image-20220524094909-1.png||height="335" width="729"]]
1447
1448
1449 [[image:image-20220524094909-2.png||height="337" width="729"]]
1450
1451
1452 [[image:image-20220524094909-3.png||height="338" width="727"]]
1453
1454
1455 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1456
1457
1458 [[image:image-20220524094909-5.png||height="341" width="734"]]
1459
1460
1461 == 3.6 Interface Detail ==
1462
1463 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1464
1465
1466 Support NPN Type sensor
1467
1468 [[image:1653356991268-289.png]]
1469
1470
1471 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1472
1473
1474 (((
1475 The DI port of LT-22222-L can support **NPN** or **PNP** or **Dry Contact** output sensor.
1476 )))
1477
1478 (((
1479 (((
1480 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). (% class="mark" %)When there is active current pass NEC2501 pin1 to pin2. The DI will be active high and DI LED status will change.
1481
1482
1483 )))
1484 )))
1485
1486 [[image:1653357170703-587.png]]
1487
1488 (((
1489 (((
1490 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1491 )))
1492 )))
1493
1494 (((
1495
1496 )))
1497
1498 (((
1499 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1500 )))
1501
1502 (((
1503 This type of sensor will output a low signal GND when active.
1504 )))
1505
1506 * (((
1507 Connect sensor's output to DI1-
1508 )))
1509 * (((
1510 Connect sensor's VCC to DI1+.
1511 )))
1512
1513 (((
1514 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1515 )))
1516
1517 (((
1518 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1519 )))
1520
1521 (((
1522 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.
1523 )))
1524
1525 (((
1526
1527 )))
1528
1529 (((
1530 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1531 )))
1532
1533 (((
1534 This type of sensor will output a high signal (example 24v) when active.
1535 )))
1536
1537 * (((
1538 Connect sensor's output to DI1+
1539 )))
1540 * (((
1541 Connect sensor's GND DI1-.
1542 )))
1543
1544 (((
1545 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1546 )))
1547
1548 (((
1549 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1550 )))
1551
1552 (((
1553 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.
1554 )))
1555
1556 (((
1557
1558 )))
1559
1560 (((
1561 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1562 )))
1563
1564 (((
1565 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1566 )))
1567
1568 * (((
1569 Connect sensor's output to DI1+ with a serial 50K resistor
1570 )))
1571 * (((
1572 Connect sensor's GND DI1-.
1573 )))
1574
1575 (((
1576 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1577 )))
1578
1579 (((
1580 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1581 )))
1582
1583 (((
1584 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.
1585 )))
1586
1587
1588 (% style="color:blue" %)**Example4**(%%): Connect to Dry Contact sensor
1589
1590 From above DI ports circuit, we can see that active the photocoupler will need to have a voltage difference between DI+ and DI- port. While the Dry Contact sensor is a passive component which can't provide this voltage difference.
1591
1592 To detect a Dry Contact, we can provide a power source to one pin of the Dry Contact. Below is a reference connection.
1593
1594 [[image:image-20230616235145-1.png]]
1595
1596
1597 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1598
1599
1600 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1601
1602 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1603
1604 [[image:1653357531600-905.png]]
1605
1606
1607 === 3.6.4 Analog Input Interface ===
1608
1609
1610 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:
1611
1612
1613 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1614
1615 [[image:1653357592296-182.png]]
1616
1617 Example to connect a 4~~20mA sensor
1618
1619 We take the wind speed sensor as an example for reference only.
1620
1621
1622 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1623
1624 (% style="color:red" %)**Red:  12~~24v**
1625
1626 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1627
1628 **Black:  GND**
1629
1630 **Connection diagram:**
1631
1632 [[image:1653357640609-758.png]]
1633
1634 [[image:1653357648330-671.png||height="155" width="733"]]
1635
1636
1637 Example connected to a regulated power supply to measure voltage
1638
1639 [[image:image-20230608101532-1.png||height="606" width="447"]]
1640
1641 [[image:image-20230608101608-2.jpeg||height="379" width="284"]]
1642
1643 [[image:image-20230608101722-3.png||height="102" width="1139"]]
1644
1645
1646 (% style="color:blue; font-weight:bold" %)**Specifications of the regulated power**(%%) (% style="color:blue" %)**:**
1647
1648 (% style="color:red" %)**Red:  12~~24v**
1649
1650 **Black:  GND**
1651
1652
1653 === 3.6.5 Relay Output ===
1654
1655
1656 (((
1657 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:
1658
1659 **Note**: RO pins go to Open(NO) when device is power off.
1660 )))
1661
1662 [[image:image-20220524100215-9.png]]
1663
1664
1665 [[image:image-20220524100215-10.png||height="382" width="723"]]
1666
1667
1668 == 3.7 LEDs Indicators ==
1669
1670
1671 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1672 |(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**LEDs**|(% style="background-color:#d9e2f3; color:#0070c0; width:470px" %)**Feature**
1673 |**PWR**|Always on if there is power
1674 |**SYS**|(((
1675 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.
1676 )))
1677 |**TX**|(((
1678 (((
1679 Device boot: TX blinks 5 times.
1680 )))
1681
1682 (((
1683 Successful join network: TX ON for 5 seconds.
1684 )))
1685
1686 (((
1687 Transmit a LoRa packet: TX blinks once
1688 )))
1689 )))
1690 |**RX**|RX blinks once when receive a packet.
1691 |**DO1**|
1692 |**DO2**|
1693 |**DO3**|
1694 |**DI2**|(((
1695 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1696 )))
1697 |**DI2**|(((
1698 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1699 )))
1700 |**DI2**|(((
1701 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1702 )))
1703 |**RO1**|
1704 |**RO2**|
1705
1706
1707
1708 = 4. Use AT Command =
1709
1710 == 4.1 Access AT Command ==
1711
1712
1713 (((
1714 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.
1715 )))
1716
1717 (((
1718
1719 )))
1720
1721 [[image:1653358238933-385.png]]
1722
1723
1724 (((
1725 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:
1726 )))
1727
1728 [[image:1653358355238-883.png]]
1729
1730
1731 (((
1732 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/]]
1733 )))
1734
1735 (((
1736 AT+<CMD>?        : Help on <CMD>
1737 )))
1738
1739 (((
1740 AT+<CMD>         : Run <CMD>
1741 )))
1742
1743 (((
1744 AT+<CMD>=<value> : Set the value
1745 )))
1746
1747 (((
1748 AT+<CMD>=?       :  Get the value
1749 )))
1750
1751 (((
1752 ATZ: Trig a reset of the MCU
1753 )))
1754
1755 (((
1756 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1757 )))
1758
1759 (((
1760 AT+DEUI: Get or Set the Device EUI
1761 )))
1762
1763 (((
1764 AT+DADDR: Get or Set the Device Address
1765 )))
1766
1767 (((
1768 AT+APPKEY: Get or Set the Application Key
1769 )))
1770
1771 (((
1772 AT+NWKSKEY: Get or Set the Network Session Key
1773 )))
1774
1775 (((
1776 AT+APPSKEY:  Get or Set the Application Session Key
1777 )))
1778
1779 (((
1780 AT+APPEUI:  Get or Set the Application EUI
1781 )))
1782
1783 (((
1784 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1785 )))
1786
1787 (((
1788 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1789 )))
1790
1791 (((
1792 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1793 )))
1794
1795 (((
1796 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1797 )))
1798
1799 (((
1800 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1801 )))
1802
1803 (((
1804 AT+RX2FQ: Get or Set the Rx2 window frequency
1805 )))
1806
1807 (((
1808 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1809 )))
1810
1811 (((
1812 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1813 )))
1814
1815 (((
1816 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1817 )))
1818
1819 (((
1820 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1821 )))
1822
1823 (((
1824 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1825 )))
1826
1827 (((
1828 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1829 )))
1830
1831 (((
1832 AT+NWKID: Get or Set the Network ID
1833 )))
1834
1835 (((
1836 AT+FCU: Get or Set the Frame Counter Uplink
1837 )))
1838
1839 (((
1840 AT+FCD: Get or Set the Frame Counter Downlink
1841 )))
1842
1843 (((
1844 AT+CLASS: Get or Set the Device Class
1845 )))
1846
1847 (((
1848 AT+JOIN: Join network
1849 )))
1850
1851 (((
1852 AT+NJS: Get OTAA Join Status
1853 )))
1854
1855 (((
1856 AT+SENDB: Send hexadecimal data along with the application port
1857 )))
1858
1859 (((
1860 AT+SEND: Send text data along with the application port
1861 )))
1862
1863 (((
1864 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1865 )))
1866
1867 (((
1868 AT+RECV: Print last received data in raw format
1869 )))
1870
1871 (((
1872 AT+VER:  Get current image version and Frequency Band
1873 )))
1874
1875 (((
1876 AT+CFM: Get or Set the confirmation mode (0-1)
1877 )))
1878
1879 (((
1880 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1881 )))
1882
1883 (((
1884 AT+SNR: Get the SNR of the last received packet
1885 )))
1886
1887 (((
1888 AT+RSSI: Get the RSSI of the last received packet
1889 )))
1890
1891 (((
1892 AT+TDC: Get or set the application data transmission interval in ms
1893 )))
1894
1895 (((
1896 AT+PORT: Get or set the application port
1897 )))
1898
1899 (((
1900 AT+DISAT: Disable AT commands
1901 )))
1902
1903 (((
1904 AT+PWORD: Set password, max 9 digits
1905 )))
1906
1907 (((
1908 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1909 )))
1910
1911 (((
1912 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1913 )))
1914
1915 (((
1916 AT+CFG: Print all settings
1917 )))
1918
1919
1920 == 4.2 Common AT Command Sequence ==
1921
1922 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1923
1924 (((
1925
1926
1927 (((
1928 (% style="color:blue" %)**If device has not joined network yet:**
1929 )))
1930 )))
1931
1932 (((
1933 (% style="background-color:#dcdcdc" %)**123456**
1934 )))
1935
1936 (((
1937 (% style="background-color:#dcdcdc" %)**AT+FDR**
1938 )))
1939
1940 (((
1941 (% style="background-color:#dcdcdc" %)**123456**
1942 )))
1943
1944 (((
1945 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1946 )))
1947
1948 (((
1949 (% style="background-color:#dcdcdc" %)**ATZ**
1950 )))
1951
1952
1953 (((
1954 (% style="color:blue" %)**If device already joined network:**
1955 )))
1956
1957 (((
1958 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1959 )))
1960
1961 (((
1962 (% style="background-color:#dcdcdc" %)**ATZ**
1963 )))
1964
1965
1966 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1967
1968 (((
1969
1970
1971 (((
1972 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
1973 )))
1974 )))
1975
1976 (((
1977 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
1978 )))
1979
1980 (((
1981 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
1982 )))
1983
1984 (((
1985 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
1986 )))
1987
1988 (((
1989 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
1990 )))
1991
1992 (((
1993 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
1994 )))
1995
1996 (((
1997 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
1998 )))
1999
2000 (((
2001 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
2002 )))
2003
2004 (((
2005 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
2006 )))
2007
2008 (((
2009 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
2010 )))
2011
2012 (((
2013 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
2014 )))
2015
2016 (((
2017 (% 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.
2018 )))
2019
2020 (((
2021 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2022
2023
2024 )))
2025
2026 (((
2027 (% style="color:red" %)**Note:**
2028 )))
2029
2030 (((
2031 **~1. Make sure the device is set to ABP mode in the IoT Server.**
2032
2033 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
2034
2035 **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?
2036 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2037
2038 **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.**
2039 )))
2040
2041 (((
2042 [[image:1653359097980-169.png||height="188" width="729"]]
2043 )))
2044
2045
2046 === 4.2.3 Change to Class A ===
2047
2048
2049 (((
2050 (% style="color:blue" %)**If sensor JOINED:**
2051
2052 (% style="background-color:#dcdcdc" %)**AT+CLASS=A**
2053
2054 (% style="background-color:#dcdcdc" %)**ATZ**
2055 )))
2056
2057
2058 = 5. Case Study =
2059
2060 == 5.1 Counting how many objects pass in Flow Line ==
2061
2062
2063 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
2064
2065
2066 = 6. FAQ =
2067
2068 == 6.1 How to upgrade the image? ==
2069
2070
2071 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2072
2073 * Support new features
2074 * For bug fix
2075 * Change LoRaWAN bands.
2076
2077 Below shows the hardware connection for how to upload an image to the LT:
2078
2079 [[image:1653359603330-121.png]]
2080
2081
2082 (((
2083 (% 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]].
2084 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AACrbrDN0AqLHbBat0ViWx5Da/LT-22222-L/Firmware?dl=0&subfolder_nav_tracking=1]].
2085 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2086
2087
2088 (((
2089 (% style="color:blue" %)**For LT-22222-L**(%%):
2090 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.
2091 )))
2092
2093
2094 )))
2095
2096 [[image:image-20220524103407-12.png]]
2097
2098
2099 [[image:image-20220524103429-13.png]]
2100
2101
2102 [[image:image-20220524104033-15.png]]
2103
2104
2105 (% 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:
2106
2107 [[image:1653360054704-518.png||height="186" width="745"]]
2108
2109
2110 (((
2111 (((
2112 == 6.2 How to change the LoRa Frequency Bands/Region? ==
2113
2114
2115 )))
2116 )))
2117
2118 (((
2119 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2120 )))
2121
2122 (((
2123
2124
2125 == 6.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2126
2127
2128 )))
2129
2130 (((
2131 (((
2132 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2133 )))
2134 )))
2135
2136 (((
2137 (((
2138 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2139
2140
2141 )))
2142 )))
2143
2144 (((
2145 (% 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.
2146
2147
2148 )))
2149
2150 (((
2151 [[image:1653360231087-571.png||height="401" width="727"]]
2152
2153
2154 )))
2155
2156 (((
2157 (% 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.**
2158 )))
2159
2160
2161
2162 (((
2163 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2164
2165
2166 )))
2167
2168 (((
2169 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2170
2171 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2172
2173 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2174
2175 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2176
2177 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2178
2179 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2180
2181 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2182
2183 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2184
2185 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2186 )))
2187
2188
2189 (((
2190 As shown in below:
2191 )))
2192
2193 [[image:1653360498588-932.png||height="485" width="726"]]
2194
2195
2196 == 6.4 How to change the uplink interval? ==
2197
2198
2199 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/]]
2200
2201
2202 == 6.5 Can I see counting event in Serial? ==
2203
2204
2205 (((
2206 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.
2207
2208
2209 == 6.6 Can i use point to point communication for LT-22222-L? ==
2210
2211
2212 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]].
2213
2214
2215 )))
2216
2217 (((
2218 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2219
2220
2221 If the device is not shut down, but directly powered off.
2222
2223 It will default that this is a power-off state.
2224
2225 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2226
2227 After restart, the status before power failure will be read from flash.
2228
2229
2230 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2231
2232
2233 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2234
2235
2236 [[image:image-20221006170630-1.png||height="610" width="945"]]
2237
2238
2239 == 6.9 Can LT22222-L save RO state? ==
2240
2241
2242 Firmware version needs to be no less than 1.6.0.
2243
2244
2245 == 6.10 Why does the LT22222 always report 15.585V when measuring AVI? ==
2246
2247
2248 It is likely that the GND is not connected during the measurement, or the wire connected to the GND is loose.
2249
2250
2251 = 7. Trouble Shooting =
2252 )))
2253
2254 (((
2255 (((
2256 == 7.1 Downlink doesn't work, how to solve it? ==
2257
2258
2259 )))
2260 )))
2261
2262 (((
2263 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2264 )))
2265
2266 (((
2267
2268
2269 == 7.2 Have trouble to upload image. ==
2270
2271
2272 )))
2273
2274 (((
2275 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2276 )))
2277
2278 (((
2279
2280
2281 == 7.3 Why I can't join TTN in US915 /AU915 bands? ==
2282
2283
2284 )))
2285
2286 (((
2287 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2288 )))
2289
2290
2291 = 8. Order Info =
2292
2293
2294 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2295
2296 (% style="color:#4f81bd" %)**XXX:**
2297
2298 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2299 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2300 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2301 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2302 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2303 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2304 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2305 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2306 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2307
2308
2309
2310 = 9. Packing Info =
2311
2312
2313 **Package Includes**:
2314
2315 * LT-22222-L I/O Controller x 1
2316 * Stick Antenna for LoRa RF part x 1
2317 * Bracket for controller x1
2318 * Program cable x 1
2319
2320 **Dimension and weight**:
2321
2322 * Device Size: 13.5 x 7 x 3 cm
2323 * Device Weight: 105g
2324 * Package Size / pcs : 14.5 x 8 x 5 cm
2325 * Weight / pcs : 170g
2326
2327
2328
2329 = 10. Support =
2330
2331
2332 * (((
2333 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.
2334 )))
2335 * (((
2336 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]]
2337
2338
2339
2340 )))
2341
2342 = 11. Reference​​​​​ =
2343
2344
2345 * 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]]
2346 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2347 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2348
2349

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