Skip to Content
Version 126.12 by Xiaoling on 2023/06/19 16:04
Show last authors
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 == 1.4  Applications ==
193
194
195 * Smart Buildings & Home Automation
196
197 * Logistics and Supply Chain Management
198
199 * Smart Metering
200
201 * Smart Agriculture
202
203 * Smart Cities
204
205 * Smart Factory
206
207
208
209 == 1.5 Hardware Variants ==
210
211
212 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
213 |(% 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**
214 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)(((
215 (% style="text-align:center" %)
216 [[image:image-20230424115112-1.png||height="106" width="58"]]
217 )))|(% style="width:334px" %)(((
218 * 2 x Digital Input (Bi-direction)
219 * 2 x Digital Output
220 * 2 x Relay Output (5A@250VAC / 30VDC)
221 * 2 x 0~~20mA Analog Input (res:0.01mA)
222 * 2 x 0~~30V Analog Input (res:0.01v)
223 * 1 x Counting Port
224 )))
225
226 = 2. Power ON Device =
227
228
229 (((
230 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.
231 )))
232
233 (((
234 PWR will on when device is properly powered.
235
236
237 )))
238
239 [[image:1653297104069-180.png]]
240
241
242 = 3. Operation Mode =
243
244 == 3.1 How it works? ==
245
246
247 (((
248 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. 
249 )))
250
251 (((
252 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.
253 )))
254
255
256 == 3.2 Example to join LoRaWAN network ==
257
258
259 (((
260 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. 
261
262
263 )))
264
265 [[image:image-20220523172350-1.png||height="266" width="864"]]
266
267
268 (((
269 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:
270
271
272 )))
273
274 (((
275 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
276 )))
277
278 (((
279 Each LT is shipped with a sticker with the default device EUI as below:
280 )))
281
282 [[image:image-20230425173427-2.png||height="246" width="530"]]
283
284
285 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
286
287 **Add APP EUI in the application.**
288
289 [[image:1653297955910-247.png||height="321" width="716"]]
290
291
292 **Add APP KEY and DEV EUI**
293
294 [[image:1653298023685-319.png]]
295
296
297
298 (((
299 (% 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.
300
301
302 )))
303
304 [[image:1653298044601-602.png||height="405" width="709"]]
305
306
307 == 3.3 Uplink Payload ==
308
309
310 There are five working modes + one interrupt mode on LT for different type application:
311
312 * (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
313
314 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
315
316 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
317
318 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
319
320 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
321
322 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
323
324 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
325
326
327 (((
328 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
329
330 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
331 |(% 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**
332 |Value|(((
333 AVI1 voltage
334 )))|(((
335 AVI2 voltage
336 )))|(((
337 ACI1 Current
338 )))|(((
339 ACI2 Current
340 )))|DIDORO*|(((
341 Reserve
342 )))|MOD
343 )))
344
345 (((
346 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
347
348 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
349 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
350 |RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
351 )))
352
353 * RO is for relay. ROx=1 : close，ROx=0 always open.
354 * DI is for digital input. DIx=1: high or float, DIx=0: low.
355 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
356
357 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
358
359 For example if payload is: [[image:image-20220523175847-2.png]]
360
361
362 **The value for the interface is:  **
363
364 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
365
366 AVI2 channel voltage is 0x04AC/1000=1.196V
367
368 ACI1 channel current is 0x1310/1000=4.880mA
369
370 ACI2 channel current is 0x1300/1000=4.864mA
371
372 The last byte 0xAA= 10101010(B) means
373
374 * [1] RO1 relay channel is close and the RO1 LED is ON.
375 * [0] RO2 relay channel is open and RO2 LED is OFF;
376
377 **LT22222-L:**
378
379 * [1] DI2 channel is high input and DI2 LED is ON;
380 * [0] DI1 channel is low input;
381
382 * [0] DO3 channel output state
383 ** DO3 is float in case no load between DO3 and V+.;
384 ** DO3 is high in case there is load between DO3 and V+.
385 ** DO3 LED is off in both case
386 * [1] DO2 channel output is low and DO2 LED is ON.
387 * [0] DO1 channel output state
388 ** DO1 is float in case no load between DO1 and V+.;
389 ** DO1 is high in case there is load between DO1 and V+.
390 ** DO1 LED is off in both case
391
392
393
394 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
395
396
397 (((
398 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
399 )))
400
401 (((
402 Total : 11 bytes payload
403
404 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
405 |(% 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**
406 |Value|COUNT1|COUNT2 |DIDORO*|(((
407 Reserve
408 )))|MOD
409 )))
410
411 (((
412 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
413
414 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
415 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
416 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
417
418 RO is for relay. ROx=1 : close，ROx=0 always open.
419 )))
420
421 * FIRST: Indicate this is the first packet after join network.
422 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
423
424 (((
425 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
426 )))
427
428 (((
429 **To use counting mode, please run:**
430 )))
431
432
433 (((
434 (% class="box infomessage" %)
435 (((
436 **AT+MOD=2**
437
438 **ATZ**
439 )))
440 )))
441
442 (((
443
444
445 (% style="color:#4f81bd" %)**AT Commands for counting:**
446 )))
447
448 (((
449 **For LT22222-L:**
450
451 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
452
453 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
454
455 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
456
457 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
458
459 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
460
461 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
462 )))
463
464
465 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
466
467
468 **LT22222-L**: This mode the DI1 is used as a counting pin.
469
470 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
471 |(% 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**
472 |Value|COUNT1|(((
473 ACI1 Current
474 )))|(((
475 ACI2 Current
476 )))|DIDORO*|Reserve|MOD
477
478 (((
479 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
480
481 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
482 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
483 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
484 )))
485
486 * RO is for relay. ROx=1 : close，ROx=0 always open.
487 * FIRST: Indicate this is the first packet after join network.
488 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
489
490 (((
491 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
492 )))
493
494
495 (((
496 **To use counting mode, please run:**
497 )))
498
499 (((
500 (% class="box infomessage" %)
501 (((
502 **AT+MOD=3**
503
504 **ATZ**
505 )))
506 )))
507
508
509 (((
510 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
511 )))
512
513
514 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
515
516
517 (((
518 **LT22222-L**: This mode the DI1 is used as a counting pin.
519 )))
520
521 (((
522 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.
523
524 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
525 |(% 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**
526 |Value|COUNT1|AVI1 Counting|DIDORO*|(((
527 Reserve
528 )))|MOD
529 )))
530
531 (((
532 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
533
534 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
535 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
536 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
537 )))
538
539 * RO is for relay. ROx=1 : close，ROx=0 always open.
540 * FIRST: Indicate this is the first packet after join network.
541 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
542
543 (((
544 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
545 )))
546
547 (((
548 **To use this mode, please run:**
549 )))
550
551 (((
552 (((
553 **AT+MOD=4**
554
555 **ATZ**
556 )))
557 )))
558
559
560 (((
561 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
562 )))
563
564 (((
565 **Plus below command for AVI1 Counting:**
566
567 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
568
569 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
570
571 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
572
573 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
574 )))
575
576
577 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
578
579
580 **LT22222-L**: This mode the DI1 is used as a counting pin.
581
582 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
583 |(% 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**
584 |Value|(((
585 AVI1 voltage
586 )))|(((
587 AVI2 voltage
588 )))|(((
589 ACI1 Current
590 )))|COUNT1|DIDORO*|(((
591 Reserve
592 )))|MOD
593
594 (((
595 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
596
597 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
598 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
599 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
600 )))
601
602 * RO is for relay. ROx=1 : close，ROx=0 always open.
603 * FIRST: Indicate this is the first packet after join network.
604 * (((
605 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
606 )))
607
608 (((
609 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
610 )))
611
612 (((
613
614
615 **To use this mode, please run:**
616 )))
617
618
619 (((
620 (% class="box infomessage" %)
621 (((
622 **AT+MOD=5**
623
624 **ATZ**
625 )))
626 )))
627
628
629 (((
630 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
631 )))
632
633
634 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
635
636
637 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
638
639 For example, if user has configured below commands:
640
641 * **AT+MOD=1 ** **~-~->**  The normal working mode
642 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
643
644 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
645
646 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
647 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.**
648
649 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
650
651
652 (% style="color:#4f81bd" %)**Trigger base on voltage**:
653
654 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
655
656
657 **Example:**
658
659 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)
660
661 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
662
663
664
665 (% style="color:#4f81bd" %)**Trigger base on current**:
666
667 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
668
669
670 **Example:**
671
672 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
673
674
675
676 (% style="color:#4f81bd" %)**Trigger base on DI status**:
677
678 DI status trigger Flag.
679
680 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
681
682
683 **Example:**
684
685 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
686
687
688 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
689
690 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
691
692 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
693
694 AA: Code for this downlink Command:
695
696 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
697
698 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
699
700 yy2 yy2: AC1 or AV1 high limit.
701
702 yy3 yy3: AC2 or AV2 low limit.
703
704 Yy4 yy4: AC2 or AV2 high limit.
705
706
707 **Example1**: AA 00 13 88 00 00 00 00 00 00
708
709 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
710
711
712 **Example2**: AA 02 01 00
713
714 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
715
716
717
718 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
719
720 MOD6 Payload : total 11 bytes payload
721
722 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
723 |(% 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**
724 |Value|(((
725 TRI_A FLAG
726 )))|(((
727 TRI_A Status
728 )))|(((
729 TRI_DI FLAG+STA
730 )))|Reserve|Enable/Disable MOD6|(((
731 MOD(6)
732 )))
733
734 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
735
736 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
737 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
738 |(((
739 AV1_LOW
740 )))|(((
741 AV1_HIGH
742 )))|(((
743 AV2_LOW
744 )))|(((
745 AV2_HIGH
746 )))|(((
747 AC1_LOW
748 )))|(((
749 AC1_HIGH
750 )))|(((
751 AC2_LOW
752 )))|(((
753 AC2_HIGH
754 )))
755
756 * Each bits shows if the corresponding trigger has been configured.
757
758 **Example:**
759
760 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
761
762
763 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
764
765 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
766 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
767 |(((
768 AV1_LOW
769 )))|(((
770 AV1_HIGH
771 )))|(((
772 AV2_LOW
773 )))|(((
774 AV2_HIGH
775 )))|(((
776 AC1_LOW
777 )))|(((
778 AC1_HIGH
779 )))|(((
780 AC2_LOW
781 )))|(((
782 AC2_HIGH
783 )))
784
785 * Each bits shows which status has been trigger on this uplink.
786
787 **Example:**
788
789 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
790
791
792 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
793
794 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
795 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
796 |N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
797
798 * Each bits shows which status has been trigger on this uplink.
799
800 **Example:**
801
802 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
803
804 00000101: Means both DI1 and DI2 trigger are enabled.
805
806
807 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
808
809 Downlink command to poll MOD6 status:
810
811 **AB 06**
812
813 When device got this command, it will send the MOD6 payload.
814
815
816 === 3.3.7 Payload Decoder ===
817
818 (((
819
820
821 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
822 )))
823
824
825 == 3.4 ​Configure LT via AT or Downlink ==
826
827
828 (((
829 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
830 )))
831
832 (((
833 (((
834 There are two kinds of Commands:
835 )))
836 )))
837
838 * (% 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]]
839
840 * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
841
842 === 3.4.1 Common Commands ===
843
844
845 (((
846 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]]
847 )))
848
849
850 === 3.4.2 Sensor related commands ===
851
852 ==== 3.4.2.1 Set Transmit Interval ====
853
854
855 Set device uplink interval.
856
857 * (% style="color:#037691" %)**AT Command:**
858
859 (% style="color:blue" %)**AT+TDC=N **
860
861
862 **Example: **AT+TDC=30000. Means set interval to 30 seconds
863
864
865 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
866
867 (% style="color:blue" %)**0x01 aa bb cc  **(%%)** ~/~/ Same as AT+TDC=0x(aa bb cc)**
868
869
870
871 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
872
873
874 Set work mode.
875
876 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+MOD=N  **
877
878 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
879
880 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
881
882 (% style="color:blue" %)**0x0A aa  **(%%)** ** ~/~/ Same as AT+MOD=aa
883
884
885
886 ==== 3.4.2.3 Poll an uplink ====
887
888
889 * (% style="color:#037691" %)**AT Command:**(%%) There is no AT Command to poll uplink
890
891 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
892
893 (% style="color:blue" %)**0x08 FF  **(%%)** **~/~/ Poll an uplink
894
895 **Example**: 0x08FF, ask device to send an Uplink
896
897
898
899 ==== 3.4.2.4 Enable Trigger Mode ====
900
901
902 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
903
904 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ADDMOD6=1 or 0**
905
906 (% style="color:red" %)**1:** (%%)Enable Trigger Mode
907
908 (% style="color:red" %)**0: **(%%)Disable Trigger Mode
909
910
911 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
912
913 (% style="color:blue" %)**0x0A 06 aa    **(%%) ~/~/ Same as AT+ADDMOD6=aa
914
915
916
917 ==== 3.4.2.5 Poll trigger settings ====
918
919
920 Poll trigger settings
921
922 * (% style="color:#037691" %)**AT Command:**
923
924 There is no AT Command for this feature.
925
926 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
927
928 (% style="color:blue" %)**0xAB 06  ** (%%) ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
929
930
931
932 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
933
934
935 Enable Disable DI1/DI2/DI2 as trigger,
936
937 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
938
939 **Example:** AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
940
941
942 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
943
944 (% style="color:blue" %)**0xAA 02 aa bb   ** (%%) ~/~/ Same as AT+DTRI=aa,bb
945
946
947
948 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
949
950
951 Set DI1 or DI3(for LT-33222-L) trigger.
952
953 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG1=a,b**
954
955 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
956
957 (% style="color:red" %)**b :** (%%)delay timing.
958
959 **Example:** AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
960
961
962 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
963
964 (% style="color:blue" %)**0x09 01 aa bb cc    ** (%%) ~/~/ same as AT+TRIG1=aa,0x(bb cc)
965
966
967
968 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
969
970
971 Set DI2 trigger.
972
973 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG2=a,b**
974
975 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
976
977 (% style="color:red" %)**b :** (%%)delay timing.
978
979 **Example:** AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
980
981
982 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
983
984 (% style="color:blue" %)**0x09 02 aa bb cc   ** (%%)~/~/ same as AT+TRIG2=aa,0x(bb cc)
985
986
987
988 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
989
990
991 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
992
993 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ACLIM**
994
995 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
996
997 (% 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"]]
998
999
1000
1001 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1002
1003
1004 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1005
1006 * (% style="color:#037691" %)**AT Command**(%%): (% style="color:blue" %)**AT+AVLIM    **(%%)** See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1007
1008 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
1009
1010 (% 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"]]
1011
1012
1013
1014 ==== 3.4.2.11 Trigger – Set minimum interval ====
1015
1016
1017 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
1018
1019 * (% 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.
1020
1021 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
1022
1023 (% style="color:blue" %)**0x AC aa bb   **(%%) ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
1024
1025 (((
1026 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
1027 )))
1028
1029
1030
1031 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1032
1033
1034 * (% style="color:#037691" %)**AT Command**
1035
1036 There is no AT Command to control Digital Output
1037
1038
1039 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1040
1041 (% style="color:blue" %)**0x02 aa bb cc     ** (%%)~/~/ Set DO1/DO2/DO3 output
1042
1043 (((
1044 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1045 )))
1046
1047 (((
1048 01: Low,  00: High ,  11: No action
1049
1050 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1051 |(% 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**
1052 |02  01  00  11|Low|High|No Action
1053 |02  00  11  01|High|No Action|Low
1054 |02  11  01  00|No Action|Low|High
1055 )))
1056
1057 (((
1058 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1059 )))
1060
1061 (((
1062 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1063 )))
1064
1065
1066
1067 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1068
1069
1070 * (% style="color:#037691" %)**AT Command**
1071
1072 There is no AT Command to control Digital Output
1073
1074
1075 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1076
1077 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1078
1079
1080 This is to control the digital output time of DO pin. Include four bytes:
1081
1082 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1083
1084 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1085
1086 01: DO pins will change back to original state after timeout.
1087
1088 00: DO pins will change to an inverter state after timeout 
1089
1090
1091 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1092
1093 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1094 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1095 |0x01|DO1 set to low
1096 |0x00|DO1 set to high
1097 |0x11|DO1 NO Action
1098
1099 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1100
1101 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1102 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1103 |0x01|DO2 set to low
1104 |0x00|DO2 set to high
1105 |0x11|DO2 NO Action
1106
1107 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1108
1109 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1110 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1111 |0x01|DO3 set to low
1112 |0x00|DO3 set to high
1113 |0x11|DO3 NO Action
1114
1115 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:(%%) Latching time. Unit: ms
1116
1117
1118 (% style="color:red" %)**Note: **
1119
1120 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1121
1122 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1123
1124 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1125
1126
1127 **Example payload:**
1128
1129 **~1. A9 01 01 01 01 07 D0**
1130
1131 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1132
1133 **2. A9 01 00 01 11 07 D0**
1134
1135 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1136
1137 **3. A9 00 00 00 00 07 D0**
1138
1139 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1140
1141 **4. A9 00 11 01 00 07 D0**
1142
1143 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
1144
1145
1146
1147 ==== 3.4.2. 14 Relay ~-~- Control Relay Output RO1/RO2 ====
1148
1149
1150 * (% style="color:#037691" %)**AT Command:**
1151
1152 There is no AT Command to control Relay Output
1153
1154
1155 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1156
1157 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1158
1159
1160 (((
1161 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1162 )))
1163
1164 (((
1165 01: Close ,  00: Open , 11: No action
1166
1167 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1168 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO2**
1169 |03  00  11|Open|No Action
1170 |03  01  11|Close|No Action
1171 |03  11  00|No Action|Open
1172 |03  11  01|No Action|Close
1173 |03  00  00|Open|Open
1174 |03  01  01|Close|Close
1175 |03  01  00|Close|Open
1176 |03  00  01|Open|Close
1177 )))
1178
1179 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1180
1181
1182
1183 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1184
1185
1186 * (% style="color:#037691" %)**AT Command:**
1187
1188 There is no AT Command to control Relay Output
1189
1190
1191 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1192
1193 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1194
1195
1196 This is to control the relay output time of relay. Include four bytes:
1197
1198 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1199
1200 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1201
1202 01: Relays will change back to original state after timeout.
1203
1204 00: Relays will change to an inverter state after timeout
1205
1206
1207 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1208
1209 [[image:image-20221008095908-1.png||height="364" width="564"]]
1210
1211
1212 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1213
1214
1215 (% style="color:red" %)**Note:**
1216
1217 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1218
1219 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1220
1221
1222 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1223
1224
1225 **Example payload:**
1226
1227 **~1. 05 01 11 07 D0**
1228
1229 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1230
1231 **2. 05 01 10 07 D0**
1232
1233 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1234
1235 **3. 05 00 01 07 D0**
1236
1237 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1238
1239 **4. 05 00 00 07 D0**
1240
1241 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1242
1243
1244
1245 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1246
1247
1248 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1249
1250 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1251
1252 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1253
1254 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1255
1256
1257
1258 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1259
1260
1261 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1262
1263 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1264
1265 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1266
1267
1268 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1269
1270 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1271
1272
1273
1274 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1275
1276
1277 Clear counting for counting mode
1278
1279 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+CLRCOUNT         **(%%) ~/~/ clear all counting
1280
1281 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1282
1283 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1284
1285
1286
1287 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1288
1289
1290 * (% style="color:#037691" %)**AT Command:**
1291
1292 (% 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)
1293
1294
1295 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1296
1297 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1298
1299 (((
1300 range: aa bb cc:0 to 16777215,  (unit:second)
1301 )))
1302
1303
1304
1305 ==== 3.4.2.20 Reset save RO DO state ====
1306
1307
1308 * (% style="color:#037691" %)**AT Command:**
1309
1310 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1311
1312 (% 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.
1313
1314
1315 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1316
1317 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1318
1319
1320
1321 ==== 3.4.2.21 Encrypted payload ====
1322
1323
1324 * (% style="color:#037691" %)**AT Command:**
1325
1326 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1327
1328 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1329
1330
1331
1332 ==== 3.4.2.22 Get sensor value ====
1333
1334
1335 * (% style="color:#037691" %)**AT Command:**
1336
1337 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1338
1339 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1340
1341
1342
1343 ==== 3.4.2.23 Resets the downlink packet count ====
1344
1345
1346 * (% style="color:#037691" %)**AT Command:**
1347
1348 (% 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)
1349
1350 (% 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.
1351
1352
1353
1354 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1355
1356
1357 * (% style="color:#037691" %)**AT Command:**
1358
1359 (% 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)
1360
1361 (% 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.
1362
1363
1364 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1365
1366 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1367
1368
1369
1370 ==== 3.4.2.25 Copy downlink to uplink ====
1371
1372
1373 * (% style="color:#037691" %)**AT Command**(%%)**:**
1374
1375 (% 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.
1376
1377 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.
1378
1379
1380 [[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"]]
1381
1382 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1383
1384
1385
1386 [[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"]]
1387
1388 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1389
1390
1391
1392 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1393
1394
1395 * (((
1396 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1397
1398 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1399
1400
1401 )))
1402
1403 **Example：**
1404
1405 [[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"]]
1406
1407
1408 == 3.5 Integrate with Mydevice ==
1409
1410
1411 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:
1412
1413 (((
1414 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1415 )))
1416
1417 (((
1418 (% 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:
1419
1420
1421 )))
1422
1423 [[image:image-20220719105525-1.png||height="377" width="677"]]
1424
1425
1426
1427 [[image:image-20220719110247-2.png||height="388" width="683"]]
1428
1429
1430 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1431
1432 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L) and add DevEUI.(% style="display:none" %)
1433
1434 Search under The things network
1435
1436 [[image:1653356838789-523.png||height="337" width="740"]]
1437
1438
1439
1440 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1441
1442 [[image:image-20220524094909-1.png||height="335" width="729"]]
1443
1444
1445 [[image:image-20220524094909-2.png||height="337" width="729"]]
1446
1447
1448 [[image:image-20220524094909-3.png||height="338" width="727"]]
1449
1450
1451 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1452
1453
1454 [[image:image-20220524094909-5.png||height="341" width="734"]]
1455
1456
1457 == 3.6 Interface Detail ==
1458
1459 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1460
1461
1462 Support NPN Type sensor
1463
1464 [[image:1653356991268-289.png]]
1465
1466
1467 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1468
1469
1470 (((
1471 The DI port of LT-22222-L can support **NPN** or **PNP** or **Dry Contact** output sensor.
1472 )))
1473
1474 (((
1475 (((
1476 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.
1477
1478
1479 )))
1480 )))
1481
1482 [[image:1653357170703-587.png]]
1483
1484 (((
1485 (((
1486 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1487 )))
1488 )))
1489
1490 (((
1491
1492 )))
1493
1494 (((
1495 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1496 )))
1497
1498 (((
1499 This type of sensor will output a low signal GND when active.
1500 )))
1501
1502 * (((
1503 Connect sensor's output to DI1-
1504 )))
1505 * (((
1506 Connect sensor's VCC to DI1+.
1507 )))
1508
1509 (((
1510 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1511 )))
1512
1513 (((
1514 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1515 )))
1516
1517 (((
1518 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.
1519 )))
1520
1521 (((
1522
1523 )))
1524
1525 (((
1526 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1527 )))
1528
1529 (((
1530 This type of sensor will output a high signal (example 24v) when active.
1531 )))
1532
1533 * (((
1534 Connect sensor's output to DI1+
1535 )))
1536 * (((
1537 Connect sensor's GND DI1-.
1538 )))
1539
1540 (((
1541 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1542 )))
1543
1544 (((
1545 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1546 )))
1547
1548 (((
1549 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.
1550 )))
1551
1552 (((
1553
1554 )))
1555
1556 (((
1557 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1558 )))
1559
1560 (((
1561 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1562 )))
1563
1564 * (((
1565 Connect sensor's output to DI1+ with a serial 50K resistor
1566 )))
1567 * (((
1568 Connect sensor's GND DI1-.
1569 )))
1570
1571 (((
1572 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1573 )))
1574
1575 (((
1576 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1577 )))
1578
1579 (((
1580 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.
1581 )))
1582
1583
1584 (% style="color:blue" %)**Example4**(%%): Connect to Dry Contact sensor
1585
1586 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.
1587
1588 To detect a Dry Contact, we can provide a power source to one pin of the Dry Contact. Below is a reference connection.
1589
1590 [[image:image-20230616235145-1.png]]
1591
1592
1593
1594 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1595
1596
1597 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1598
1599 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1600
1601 [[image:1653357531600-905.png]]
1602
1603
1604 === 3.6.4 Analog Input Interface ===
1605
1606
1607 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:
1608
1609
1610 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1611
1612 [[image:1653357592296-182.png]]
1613
1614 Example to connect a 4~~20mA sensor
1615
1616 We take the wind speed sensor as an example for reference only.
1617
1618
1619 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1620
1621 (% style="color:red" %)**Red:  12~~24v**
1622
1623 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1624
1625 **Black:  GND**
1626
1627 **Connection diagram:**
1628
1629 [[image:1653357640609-758.png]]
1630
1631 [[image:1653357648330-671.png||height="155" width="733"]]
1632
1633
1634 Example connected to a regulated power supply to measure voltage
1635
1636 [[image:image-20230608101532-1.png||height="606" width="447"]]
1637
1638 [[image:image-20230608101608-2.jpeg||height="379" width="284"]]
1639
1640 [[image:image-20230608101722-3.png||height="102" width="1139"]]
1641
1642
1643 (% style="color:blue; font-weight:bold" %)**Specifications of the regulated power**(%%) (% style="color:blue" %)**:**
1644
1645 (% style="color:red" %)**Red:  12~~24v**
1646
1647 **Black:  GND**
1648
1649
1650 === 3.6.5 Relay Output ===
1651
1652
1653 (((
1654 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:
1655
1656 **Note**: RO pins go to Open(NO) when device is power off.
1657 )))
1658
1659 [[image:image-20220524100215-9.png]]
1660
1661
1662 [[image:image-20220524100215-10.png||height="382" width="723"]]
1663
1664
1665 == 3.7 LEDs Indicators ==
1666
1667
1668 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1669 |(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**LEDs**|(% style="background-color:#d9e2f3; color:#0070c0; width:470px" %)**Feature**
1670 |**PWR**|Always on if there is power
1671 |**SYS**|(((
1672 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.
1673 )))
1674 |**TX**|(((
1675 (((
1676 Device boot: TX blinks 5 times.
1677 )))
1678
1679 (((
1680 Successful join network: TX ON for 5 seconds.
1681 )))
1682
1683 (((
1684 Transmit a LoRa packet: TX blinks once
1685 )))
1686 )))
1687 |**RX**|RX blinks once when receive a packet.
1688 |**DO1**|
1689 |**DO2**|
1690 |**DO3**|
1691 |**DI2**|(((
1692 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1693 )))
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 |**RO1**|
1701 |**RO2**|
1702
1703 = 4. Use AT Command =
1704
1705 == 4.1 Access AT Command ==
1706
1707
1708 (((
1709 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.
1710 )))
1711
1712 (((
1713
1714 )))
1715
1716 [[image:1653358238933-385.png]]
1717
1718
1719 (((
1720 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:
1721 )))
1722
1723 [[image:1653358355238-883.png]]
1724
1725
1726 (((
1727 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/]]
1728 )))
1729
1730 (((
1731 AT+<CMD>?        : Help on <CMD>
1732 )))
1733
1734 (((
1735 AT+<CMD>         : Run <CMD>
1736 )))
1737
1738 (((
1739 AT+<CMD>=<value> : Set the value
1740 )))
1741
1742 (((
1743 AT+<CMD>=?       :  Get the value
1744 )))
1745
1746 (((
1747 ATZ: Trig a reset of the MCU
1748 )))
1749
1750 (((
1751 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1752 )))
1753
1754 (((
1755 AT+DEUI: Get or Set the Device EUI
1756 )))
1757
1758 (((
1759 AT+DADDR: Get or Set the Device Address
1760 )))
1761
1762 (((
1763 AT+APPKEY: Get or Set the Application Key
1764 )))
1765
1766 (((
1767 AT+NWKSKEY: Get or Set the Network Session Key
1768 )))
1769
1770 (((
1771 AT+APPSKEY:  Get or Set the Application Session Key
1772 )))
1773
1774 (((
1775 AT+APPEUI:  Get or Set the Application EUI
1776 )))
1777
1778 (((
1779 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1780 )))
1781
1782 (((
1783 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1784 )))
1785
1786 (((
1787 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1788 )))
1789
1790 (((
1791 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1792 )))
1793
1794 (((
1795 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1796 )))
1797
1798 (((
1799 AT+RX2FQ: Get or Set the Rx2 window frequency
1800 )))
1801
1802 (((
1803 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1804 )))
1805
1806 (((
1807 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1808 )))
1809
1810 (((
1811 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1812 )))
1813
1814 (((
1815 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1816 )))
1817
1818 (((
1819 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1820 )))
1821
1822 (((
1823 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1824 )))
1825
1826 (((
1827 AT+NWKID: Get or Set the Network ID
1828 )))
1829
1830 (((
1831 AT+FCU: Get or Set the Frame Counter Uplink
1832 )))
1833
1834 (((
1835 AT+FCD: Get or Set the Frame Counter Downlink
1836 )))
1837
1838 (((
1839 AT+CLASS: Get or Set the Device Class
1840 )))
1841
1842 (((
1843 AT+JOIN: Join network
1844 )))
1845
1846 (((
1847 AT+NJS: Get OTAA Join Status
1848 )))
1849
1850 (((
1851 AT+SENDB: Send hexadecimal data along with the application port
1852 )))
1853
1854 (((
1855 AT+SEND: Send text data along with the application port
1856 )))
1857
1858 (((
1859 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1860 )))
1861
1862 (((
1863 AT+RECV: Print last received data in raw format
1864 )))
1865
1866 (((
1867 AT+VER:  Get current image version and Frequency Band
1868 )))
1869
1870 (((
1871 AT+CFM: Get or Set the confirmation mode (0-1)
1872 )))
1873
1874 (((
1875 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1876 )))
1877
1878 (((
1879 AT+SNR: Get the SNR of the last received packet
1880 )))
1881
1882 (((
1883 AT+RSSI: Get the RSSI of the last received packet
1884 )))
1885
1886 (((
1887 AT+TDC: Get or set the application data transmission interval in ms
1888 )))
1889
1890 (((
1891 AT+PORT: Get or set the application port
1892 )))
1893
1894 (((
1895 AT+DISAT: Disable AT commands
1896 )))
1897
1898 (((
1899 AT+PWORD: Set password, max 9 digits
1900 )))
1901
1902 (((
1903 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1904 )))
1905
1906 (((
1907 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1908 )))
1909
1910 (((
1911 AT+CFG: Print all settings
1912 )))
1913
1914
1915 == 4.2 Common AT Command Sequence ==
1916
1917 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1918
1919 (((
1920
1921
1922 (((
1923 (% style="color:blue" %)**If device has not joined network yet:**
1924 )))
1925 )))
1926
1927 (((
1928 (% style="background-color:#dcdcdc" %)**123456**
1929 )))
1930
1931 (((
1932 (% style="background-color:#dcdcdc" %)**AT+FDR**
1933 )))
1934
1935 (((
1936 (% style="background-color:#dcdcdc" %)**123456**
1937 )))
1938
1939 (((
1940 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1941 )))
1942
1943 (((
1944 (% style="background-color:#dcdcdc" %)**ATZ**
1945 )))
1946
1947
1948 (((
1949 (% style="color:blue" %)**If device already joined network:**
1950 )))
1951
1952 (((
1953 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1954 )))
1955
1956 (((
1957 (% style="background-color:#dcdcdc" %)**ATZ**
1958 )))
1959
1960
1961 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1962
1963 (((
1964
1965
1966 (((
1967 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
1968 )))
1969 )))
1970
1971 (((
1972 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
1973 )))
1974
1975 (((
1976 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
1977 )))
1978
1979 (((
1980 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
1981 )))
1982
1983 (((
1984 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
1985 )))
1986
1987 (((
1988 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
1989 )))
1990
1991 (((
1992 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
1993 )))
1994
1995 (((
1996 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
1997 )))
1998
1999 (((
2000 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
2001 )))
2002
2003 (((
2004 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
2005 )))
2006
2007 (((
2008 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
2009 )))
2010
2011 (((
2012 (% 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.
2013 )))
2014
2015 (((
2016 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2017
2018
2019 )))
2020
2021 (((
2022 (% style="color:red" %)**Note:**
2023 )))
2024
2025 (((
2026 **~1. Make sure the device is set to ABP mode in the IoT Server.**
2027
2028 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
2029
2030 **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?
2031 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2032
2033 **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.**
2034
2035
2036 )))
2037
2038 (((
2039 [[image:1653359097980-169.png||height="188" width="729"]]
2040 )))
2041
2042 (((
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 ATZ**
2054 )))
2055
2056
2057 = 5. Case Study =
2058
2059 == 5.1 Counting how many objects pass in Flow Line ==
2060
2061
2062 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
2063
2064
2065 = 6. FAQ =
2066
2067 == 6.1 How to upgrade the image? ==
2068
2069
2070 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2071
2072 * Support new features
2073 * For bug fix
2074 * Change LoRaWAN bands.
2075
2076 Below shows the hardware connection for how to upload an image to the LT:
2077
2078 [[image:1653359603330-121.png]]
2079
2080
2081 (((
2082 (% 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]].
2083 (% 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]].
2084 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2085
2086
2087 (((
2088 (% style="color:blue" %)**For LT-22222-L**(%%):
2089 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.
2090 )))
2091
2092
2093 )))
2094
2095 [[image:image-20220524103407-12.png]]
2096
2097
2098 [[image:image-20220524103429-13.png]]
2099
2100
2101 [[image:image-20220524104033-15.png]]
2102
2103
2104 (% 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:
2105
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 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2171 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2172 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2173 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2174 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2175 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2176 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2177 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2178 )))
2179
2180
2181 (((
2182 As shown in below:
2183 )))
2184
2185 [[image:1653360498588-932.png||height="485" width="726"]]
2186
2187
2188 == 6.4 How to change the uplink interval？ ==
2189
2190
2191 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/]]
2192
2193
2194 == 6.5 Can I see counting event in Serial? ==
2195
2196
2197 (((
2198 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.
2199
2200
2201 == 6.6 Can i use point to point communication for LT-22222-L? ==
2202
2203
2204 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]].
2205
2206
2207 )))
2208
2209 (((
2210 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2211
2212
2213 If the device is not shut down, but directly powered off.
2214
2215 It will default that this is a power-off state.
2216
2217 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2218
2219 After restart, the status before power failure will be read from flash.
2220
2221
2222 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2223
2224
2225 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2226
2227
2228 [[image:image-20221006170630-1.png||height="610" width="945"]]
2229
2230
2231 == 6.9 Can LT22222-L save RO state? ==
2232
2233
2234 Firmware version needs to be no less than 1.6.0.
2235
2236
2237 = 7. Trouble Shooting =
2238 )))
2239
2240 (((
2241 (((
2242 == 7.1 Downlink doesn't work, how to solve it? ==
2243
2244
2245 )))
2246 )))
2247
2248 (((
2249 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2250 )))
2251
2252 (((
2253
2254
2255 == 7.2 Have trouble to upload image. ==
2256
2257
2258 )))
2259
2260 (((
2261 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2262 )))
2263
2264 (((
2265
2266
2267 == 7.3 Why I can't join TTN in US915 /AU915 bands? ==
2268
2269
2270 )))
2271
2272 (((
2273 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2274 )))
2275
2276
2277 = 8. Order Info =
2278
2279
2280 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2281
2282 (% style="color:#4f81bd" %)**XXX:**
2283
2284 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2285 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2286 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2287 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2288 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2289 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2290 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2291 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2292 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2293
2294 = 9. Packing Info =
2295
2296
2297 **Package Includes**:
2298
2299 * LT-22222-L I/O Controller x 1
2300 * Stick Antenna for LoRa RF part x 1
2301 * Bracket for controller x1
2302 * Program cable x 1
2303
2304 **Dimension and weight**:
2305
2306 * Device Size: 13.5 x 7 x 3 cm
2307 * Device Weight: 105g
2308 * Package Size / pcs : 14.5 x 8 x 5 cm
2309 * Weight / pcs : 170g
2310
2311 = 10. Support =
2312
2313
2314 * (((
2315 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.
2316 )))
2317 * (((
2318 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]]
2319
2320
2321
2322 )))
2323
2324 = 11. Reference​​​​​ =
2325
2326
2327 * 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]]
2328 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2329 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2330
2331