Version 128.8 by Xiaoling on 2024/01/15 16:30
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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 == 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 == 1.5 Hardware Variants ==
208
209
210 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
211 |(% style="background-color:#4f81bd; color:white; width:103px" %)**Model**|(% style="background-color:#4f81bd; color:white; width:131px" %)**Photo**|(% style="background-color:#4f81bd; color:white; width:266px" %)**Description**
212 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)(((
213 (% style="text-align:center" %)
214 [[image:image-20230424115112-1.png||height="106" width="58"]]
215 )))|(% style="width:334px" %)(((
216 * 2 x Digital Input (Bi-direction)
217 * 2 x Digital Output
218 * 2 x Relay Output (5A@250VAC / 30VDC)
219 * 2 x 0~~20mA Analog Input (res:0.01mA)
220 * 2 x 0~~30V Analog Input (res:0.01v)
221 * 1 x Counting Port
222 )))
223
224 = 2. Power ON Device =
225
226
227 (((
228 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.
229 )))
230
231 (((
232 PWR will on when device is properly powered.
233
234
235 )))
236
237 [[image:1653297104069-180.png]]
238
239
240 = 3. Operation Mode =
241
242 == 3.1 How it works? ==
243
244
245 (((
246 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. 
247 )))
248
249 (((
250 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.
251 )))
252
253
254 == 3.2 Example to join LoRaWAN network ==
255
256
257 (((
258 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. 
259
260
261 )))
262
263 [[image:image-20220523172350-1.png||height="266" width="864"]]
264
265
266 (((
267 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:
268
269
270 )))
271
272 (((
273 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
274 )))
275
276 (((
277 Each LT is shipped with a sticker with the default device EUI as below:
278 )))
279
280 [[image:image-20230425173427-2.png||height="246" width="530"]]
281
282
283 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
284
285 **Add APP EUI in the application.**
286
287 [[image:1653297955910-247.png||height="321" width="716"]]
288
289
290 **Add APP KEY and DEV EUI**
291
292 [[image:1653298023685-319.png]]
293
294
295 (((
296 (% 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.
297
298
299 )))
300
301 [[image:1653298044601-602.png||height="405" width="709"]]
302
303
304 == 3.3 Uplink Payload ==
305
306
307 There are five working modes + one interrupt mode on LT for different type application:
308
309 * (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
310
311 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
312
313 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
314
315 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
316
317 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
318
319 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
320
321 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
322
323
324 (((
325 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
326
327 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
328 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
329 |Value|(((
330 AVI1 voltage
331 )))|(((
332 AVI2 voltage
333 )))|(((
334 ACI1 Current
335 )))|(((
336 ACI2 Current
337 )))|DIDORO*|(((
338 Reserve
339 )))|MOD
340 )))
341
342 (((
343 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
344
345 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
346 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
347 |RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
348 )))
349
350 * RO is for relay. ROx=1 : close, ROx=0 always open.
351 * DI is for digital input. DIx=1: high or float, DIx=0: low.
352 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
353
354 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
355
356 For example if payload is: [[image:image-20220523175847-2.png]]
357
358
359 **The value for the interface is:  **
360
361 AVI1 channel voltage is 0x04AB/1000=1195(DEC)/1000=1.195V
362
363 AVI2 channel voltage is 0x04AC/1000=1.196V
364
365 ACI1 channel current is 0x1310/1000=4.880mA
366
367 ACI2 channel current is 0x1300/1000=4.864mA
368
369 The last byte 0xAA= 10101010(B) means
370
371 * [1] RO1 relay channel is close and the RO1 LED is ON.
372 * [0] RO2 relay channel is open and RO2 LED is OFF;
373
374 **LT22222-L:**
375
376 * [1] DI2 channel is high input and DI2 LED is ON;
377 * [0] DI1 channel is low input;
378
379 * [0] DO3 channel output state
380 ** DO3 is float in case no load between DO3 and V+.;
381 ** DO3 is high in case there is load between DO3 and V+.
382 ** DO3 LED is off in both case
383 * [1] DO2 channel output is low and DO2 LED is ON.
384 * [0] DO1 channel output state
385 ** DO1 is float in case no load between DO1 and V+.;
386 ** DO1 is high in case there is load between DO1 and V+.
387 ** DO1 LED is off in both case
388
389 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
390
391
392 (((
393 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
394 )))
395
396 (((
397 Total : 11 bytes payload
398
399 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
400 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
401 |Value|COUNT1|COUNT2 |DIDORO*|(((
402 Reserve
403 )))|MOD
404 )))
405
406 (((
407 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
408
409 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
410 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
411 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
412
413 RO is for relay. ROx=1 : close , ROx=0 always open.
414 )))
415
416 * FIRST: Indicate this is the first packet after join network.
417 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
418
419 (((
420 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
421
422
423 )))
424
425 (((
426 **To use counting mode, please run:**
427 )))
428
429 (((
430 (% class="box infomessage" %)
431 (((
432 **AT+MOD=2**
433
434 **ATZ**
435 )))
436 )))
437
438 (((
439
440
441 (% style="color:#4f81bd" %)**AT Commands for counting:**
442 )))
443
444 (((
445 **For LT22222-L:**
446
447 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
448
449 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
450
451 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
452
453 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
454
455 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
456
457 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
458 )))
459
460
461 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
462
463
464 **LT22222-L**: This mode the DI1 is used as a counting pin.
465
466 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
467 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
468 |Value|COUNT1|(((
469 ACI1 Current
470 )))|(((
471 ACI2 Current
472 )))|DIDORO*|Reserve|MOD
473
474 (((
475 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
476
477 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
478 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
479 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
480 )))
481
482 * RO is for relay. ROx=1 : close, ROx=0 always open.
483 * FIRST: Indicate this is the first packet after join network.
484 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
485
486 (((
487 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
488 )))
489
490
491 (((
492 **To use counting mode, please run:**
493 )))
494
495 (((
496 (% class="box infomessage" %)
497 (((
498 **AT+MOD=3**
499
500 **ATZ**
501 )))
502 )))
503
504 (((
505 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
506 )))
507
508
509 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
510
511
512 (((
513 **LT22222-L**: This mode the DI1 is used as a counting pin.
514 )))
515
516 (((
517 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.
518
519 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
520 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**4**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
521 |Value|COUNT1|AVI1 Counting|DIDORO*|(((
522 Reserve
523 )))|MOD
524 )))
525
526 (((
527 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
528
529 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
530 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
531 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
532 )))
533
534 * RO is for relay. ROx=1 : close, ROx=0 always open.
535 * FIRST: Indicate this is the first packet after join network.
536 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
537
538 (((
539 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
540
541
542 )))
543
544 (((
545 **To use this mode, please run:**
546 )))
547
548 (((
549 (% class="box infomessage" %)
550 (((
551 **AT+MOD=4**
552
553 **ATZ**
554 )))
555 )))
556
557 (((
558 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
559 )))
560
561 (((
562 **Plus below command for AVI1 Counting:**
563
564 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
565
566 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
567
568 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
569
570 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
571 )))
572
573
574 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
575
576
577 **LT22222-L**: This mode the DI1 is used as a counting pin.
578
579 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
580 |(% style="background-color:#4f81bd; color:white" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**2**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**|(% style="background-color:#4f81bd; color:white" %)**1**
581 |Value|(((
582 AVI1 voltage
583 )))|(((
584 AVI2 voltage
585 )))|(((
586 ACI1 Current
587 )))|COUNT1|DIDORO*|(((
588 Reserve
589 )))|MOD
590
591 (((
592 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
593
594 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
595 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
596 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
597 )))
598
599 * RO is for relay. ROx=1 : close, ROx=0 always open.
600 * FIRST: Indicate this is the first packet after join network.
601 * (((
602 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
603 )))
604
605 (((
606 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
607 )))
608
609 (((
610 **To use this mode, please run:**
611 )))
612
613 (((
614 (% class="box infomessage" %)
615 (((
616 **AT+MOD=5**
617
618 **ATZ**
619 )))
620 )))
621
622 (((
623 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
624 )))
625
626
627 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
628
629
630 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
631
632 For example, if user has configured below commands:
633
634 * **AT+MOD=1 ** **~-~->**  The normal working mode
635 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
636
637 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
638
639 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
640 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.**
641
642 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
643
644
645 (% style="color:#4f81bd" %)**Trigger base on voltage**:
646
647 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
648
649
650 **Example:**
651
652 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)
653
654 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
655
656
657
658 (% style="color:#4f81bd" %)**Trigger base on current**:
659
660 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
661
662
663 **Example:**
664
665 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
666
667
668
669 (% style="color:#4f81bd" %)**Trigger base on DI status**:
670
671 DI status trigger Flag.
672
673 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
674
675
676 **Example:**
677
678 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
679
680
681 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
682
683 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
684
685 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
686
687 AA: Code for this downlink Command:
688
689 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
690
691 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
692
693 yy2 yy2: AC1 or AV1 high limit.
694
695 yy3 yy3: AC2 or AV2 low limit.
696
697 Yy4 yy4: AC2 or AV2 high limit.
698
699
700 **Example1**: AA 00 13 88 00 00 00 00 00 00
701
702 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
703
704
705 **Example2**: AA 02 01 00
706
707 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
708
709
710
711 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
712
713 MOD6 Payload : total 11 bytes payload
714
715 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
716 |(% style="background-color:#4f81bd; color:white; width:60px" %)**Size(bytes)**|(% style="background-color:#4f81bd; color:white; width:69px" %)**1**|(% style="background-color:#4f81bd; color:white; width:69px" %)**1**|(% style="background-color:#4f81bd; color:white; width:109px" %)**1**|(% style="background-color:#4f81bd; color:white; width:49px" %)**6**|(% style="background-color:#4f81bd; color:white; width:109px" %)**1**|(% style="background-color:#4f81bd; color:white; width:50px" %)**1**
717 |Value|(((
718 TRI_A FLAG
719 )))|(((
720 TRI_A Status
721 )))|(((
722 TRI_DI FLAG+STA
723 )))|Reserve|Enable/Disable MOD6|(((
724 MOD(6)
725 )))
726
727 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
728
729 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
730 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
731 |(((
732 AV1_LOW
733 )))|(((
734 AV1_HIGH
735 )))|(((
736 AV2_LOW
737 )))|(((
738 AV2_HIGH
739 )))|(((
740 AC1_LOW
741 )))|(((
742 AC1_HIGH
743 )))|(((
744 AC2_LOW
745 )))|(((
746 AC2_HIGH
747 )))
748
749 * Each bits shows if the corresponding trigger has been configured.
750
751 **Example:**
752
753 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
754
755
756 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
757
758 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
759 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
760 |(((
761 AV1_LOW
762 )))|(((
763 AV1_HIGH
764 )))|(((
765 AV2_LOW
766 )))|(((
767 AV2_HIGH
768 )))|(((
769 AC1_LOW
770 )))|(((
771 AC1_HIGH
772 )))|(((
773 AC2_LOW
774 )))|(((
775 AC2_HIGH
776 )))
777
778 * Each bits shows which status has been trigger on this uplink.
779
780 **Example:**
781
782 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
783
784
785 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
786
787 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
788 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
789 |N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
790
791 * Each bits shows which status has been trigger on this uplink.
792
793 **Example:**
794
795 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
796
797 00000101: Means both DI1 and DI2 trigger are enabled.
798
799
800 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
801
802 Downlink command to poll MOD6 status:
803
804 **AB 06**
805
806 When device got this command, it will send the MOD6 payload.
807
808
809 === 3.3.7 Payload Decoder ===
810
811 (((
812
813
814 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
815 )))
816
817
818 == 3.4 ​Configure LT via AT or Downlink ==
819
820
821 (((
822 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
823 )))
824
825 (((
826 (((
827 There are two kinds of Commands:
828 )))
829 )))
830
831 * (% 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]]
832
833 * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
834
835 === 3.4.1 Common Commands ===
836
837
838 (((
839 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]]
840 )))
841
842
843 === 3.4.2 Sensor related commands ===
844
845 ==== 3.4.2.1 Set Transmit Interval ====
846
847
848 Set device uplink interval.
849
850 * (% style="color:#037691" %)**AT Command:**
851
852 (% style="color:blue" %)**AT+TDC=N **
853
854
855 **Example: **AT+TDC=30000. Means set interval to 30 seconds
856
857
858 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
859
860 (% style="color:blue" %)**0x01 aa bb cc  **(%%)** ~/~/ Same as AT+TDC=0x(aa bb cc)**
861
862
863
864 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
865
866
867 Set work mode.
868
869 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+MOD=N  **
870
871 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
872
873 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
874
875 (% style="color:blue" %)**0x0A aa  **(%%)** ** ~/~/ Same as AT+MOD=aa
876
877
878
879 ==== 3.4.2.3 Poll an uplink ====
880
881
882 * (% style="color:#037691" %)**AT Command:**(%%) There is no AT Command to poll uplink
883
884 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
885
886 (% style="color:blue" %)**0x08 FF  **(%%)** **~/~/ Poll an uplink
887
888 **Example**: 0x08FF, ask device to send an Uplink
889
890
891
892 ==== 3.4.2.4 Enable Trigger Mode ====
893
894
895 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
896
897 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ADDMOD6=1 or 0**
898
899 (% style="color:red" %)**1:** (%%)Enable Trigger Mode
900
901 (% style="color:red" %)**0: **(%%)Disable Trigger Mode
902
903
904 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
905
906 (% style="color:blue" %)**0x0A 06 aa    **(%%) ~/~/ Same as AT+ADDMOD6=aa
907
908
909
910 ==== 3.4.2.5 Poll trigger settings ====
911
912
913 Poll trigger settings
914
915 * (% style="color:#037691" %)**AT Command:**
916
917 There is no AT Command for this feature.
918
919 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
920
921 (% style="color:blue" %)**0xAB 06  ** (%%) ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
922
923
924
925 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
926
927
928 Enable Disable DI1/DI2/DI2 as trigger,
929
930 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
931
932 **Example:** AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
933
934
935 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
936
937 (% style="color:blue" %)**0xAA 02 aa bb   ** (%%) ~/~/ Same as AT+DTRI=aa,bb
938
939
940
941 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
942
943
944 Set DI1 or DI3(for LT-33222-L) trigger.
945
946 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG1=a,b**
947
948 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
949
950 (% style="color:red" %)**b :** (%%)delay timing.
951
952 **Example:** AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
953
954
955 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
956
957 (% style="color:blue" %)**0x09 01 aa bb cc    ** (%%) ~/~/ same as AT+TRIG1=aa,0x(bb cc)
958
959
960
961 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
962
963
964 Set DI2 trigger.
965
966 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG2=a,b**
967
968 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
969
970 (% style="color:red" %)**b :** (%%)delay timing.
971
972 **Example:** AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
973
974
975 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
976
977 (% style="color:blue" %)**0x09 02 aa bb cc   ** (%%)~/~/ same as AT+TRIG2=aa,0x(bb cc)
978
979
980
981 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
982
983
984 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
985
986 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ACLIM**
987
988 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
989
990 (% 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"]]
991
992
993
994 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
995
996
997 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
998
999 * (% style="color:#037691" %)**AT Command**(%%): (% style="color:blue" %)**AT+AVLIM    **(%%)** See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1000
1001 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
1002
1003 (% 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"]]
1004
1005
1006
1007 ==== 3.4.2.11 Trigger – Set minimum interval ====
1008
1009
1010 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
1011
1012 * (% 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.
1013
1014 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
1015
1016 (% style="color:blue" %)**0x AC aa bb   **(%%) ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
1017
1018 (((
1019 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
1020 )))
1021
1022
1023
1024 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1025
1026
1027 * (% style="color:#037691" %)**AT Command**
1028
1029 There is no AT Command to control Digital Output
1030
1031
1032 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1033
1034 (% style="color:blue" %)**0x02 aa bb cc     ** (%%)~/~/ Set DO1/DO2/DO3 output
1035
1036 (((
1037 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1038 )))
1039
1040 (((
1041 01: Low,  00: High ,  11: No action
1042
1043 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1044 |(% style="background-color:#4f81bd; color:white" %)**Downlink Code**|(% style="background-color:#4f81bd; color:white" %)**DO1**|(% style="background-color:#4f81bd; color:white" %)**DO2**|(% style="background-color:#4f81bd; color:white" %)**DO3**
1045 |02  01  00  11|Low|High|No Action
1046 |02  00  11  01|High|No Action|Low
1047 |02  11  01  00|No Action|Low|High
1048 )))
1049
1050 (((
1051 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1052 )))
1053
1054 (((
1055 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1056 )))
1057
1058
1059
1060 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1061
1062
1063 * (% style="color:#037691" %)**AT Command**
1064
1065 There is no AT Command to control Digital Output
1066
1067
1068 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1069
1070 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1071
1072
1073 This is to control the digital output time of DO pin. Include four bytes:
1074
1075 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1076
1077 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1078
1079 01: DO pins will change back to original state after timeout.
1080
1081 00: DO pins will change to an inverter state after timeout 
1082
1083
1084 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1085
1086 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1087 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1088 |0x01|DO1 set to low
1089 |0x00|DO1 set to high
1090 |0x11|DO1 NO Action
1091
1092 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1093
1094 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1095 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1096 |0x01|DO2 set to low
1097 |0x00|DO2 set to high
1098 |0x11|DO2 NO Action
1099
1100 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1101
1102 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1103 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1104 |0x01|DO3 set to low
1105 |0x00|DO3 set to high
1106 |0x11|DO3 NO Action
1107
1108 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:(%%) Latching time. Unit: ms
1109
1110
1111 (% style="color:red" %)**Note: **
1112
1113 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1114
1115 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1116
1117 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1118
1119
1120 **Example payload:**
1121
1122 **~1. A9 01 01 01 01 07 D0**
1123
1124 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1125
1126 **2. A9 01 00 01 11 07 D0**
1127
1128 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1129
1130 **3. A9 00 00 00 00 07 D0**
1131
1132 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1133
1134 **4. A9 00 11 01 00 07 D0**
1135
1136 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
1137
1138
1139
1140 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1141
1142
1143 * (% style="color:#037691" %)**AT Command:**
1144
1145 There is no AT Command to control Relay Output
1146
1147
1148 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1149
1150 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1151
1152
1153 (((
1154 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1155 )))
1156
1157 (((
1158 01: Close ,  00: Open , 11: No action
1159
1160 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1161 |(% style="background-color:#4f81bd; color:white" %)**Downlink Code**|(% style="background-color:#4f81bd; color:white" %)**RO1**|(% style="background-color:#4f81bd; color:white" %)**RO2**
1162 |03  00  11|Open|No Action
1163 |03  01  11|Close|No Action
1164 |03  11  00|No Action|Open
1165 |03  11  01|No Action|Close
1166 |03  00  00|Open|Open
1167 |03  01  01|Close|Close
1168 |03  01  00|Close|Open
1169 |03  00  01|Open|Close
1170 )))
1171
1172 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1173
1174
1175
1176 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1177
1178
1179 * (% style="color:#037691" %)**AT Command:**
1180
1181 There is no AT Command to control Relay Output
1182
1183
1184 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1185
1186 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1187
1188
1189 This is to control the relay output time of relay. Include four bytes:
1190
1191 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1192
1193 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1194
1195 01: Relays will change back to original state after timeout.
1196
1197 00: Relays will change to an inverter state after timeout
1198
1199
1200 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1201
1202 [[image:image-20221008095908-1.png||height="364" width="564"]]
1203
1204
1205 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1206
1207
1208 (% style="color:red" %)**Note:**
1209
1210 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1211
1212 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1213
1214
1215 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1216
1217
1218 **Example payload:**
1219
1220 **~1. 05 01 11 07 D0**
1221
1222 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1223
1224 **2. 05 01 10 07 D0**
1225
1226 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1227
1228 **3. 05 00 01 07 D0**
1229
1230 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1231
1232 **4. 05 00 00 07 D0**
1233
1234 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1235
1236
1237
1238 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1239
1240
1241 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1242
1243 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1244
1245 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1246
1247 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1248
1249
1250
1251 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1252
1253
1254 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1255
1256 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1257
1258 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1259
1260
1261 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1262
1263 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1264
1265
1266
1267 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1268
1269
1270 Clear counting for counting mode
1271
1272 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+CLRCOUNT         **(%%) ~/~/ clear all counting
1273
1274 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1275
1276 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1277
1278
1279
1280 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1281
1282
1283 * (% style="color:#037691" %)**AT Command:**
1284
1285 (% 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)
1286
1287
1288 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1289
1290 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1291
1292 (((
1293 range: aa bb cc:0 to 16777215,  (unit:second)
1294 )))
1295
1296
1297
1298 ==== 3.4.2.20 Reset save RO DO state ====
1299
1300
1301 * (% style="color:#037691" %)**AT Command:**
1302
1303 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1304
1305 (% 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.
1306
1307
1308 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1309
1310 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1311
1312
1313
1314 ==== 3.4.2.21 Encrypted payload ====
1315
1316
1317 * (% style="color:#037691" %)**AT Command:**
1318
1319 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1320
1321 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1322
1323
1324
1325 ==== 3.4.2.22 Get sensor value ====
1326
1327
1328 * (% style="color:#037691" %)**AT Command:**
1329
1330 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1331
1332 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1333
1334
1335
1336 ==== 3.4.2.23 Resets the downlink packet count ====
1337
1338
1339 * (% style="color:#037691" %)**AT Command:**
1340
1341 (% 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)
1342
1343 (% 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.
1344
1345
1346
1347 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1348
1349
1350 * (% style="color:#037691" %)**AT Command:**
1351
1352 (% 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)
1353
1354 (% 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.
1355
1356
1357 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1358
1359 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1360
1361
1362
1363 ==== 3.4.2.25 Copy downlink to uplink ====
1364
1365
1366 * (% style="color:#037691" %)**AT Command**(%%)**:**
1367
1368 (% 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.
1369
1370 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.
1371
1372
1373 [[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"]]
1374
1375 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1376
1377
1378
1379 [[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"]]
1380
1381 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1382
1383
1384
1385 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1386
1387
1388 * (((
1389 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1390
1391 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1392
1393
1394 )))
1395
1396 **Example：**
1397
1398 [[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"]]
1399
1400
1401 == 3.5 Integrate with Mydevice ==
1402
1403
1404 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:
1405
1406 (((
1407 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1408 )))
1409
1410 (((
1411 (% 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:
1412
1413
1414 )))
1415
1416 [[image:image-20220719105525-1.png||height="377" width="677"]]
1417
1418
1419
1420 [[image:image-20220719110247-2.png||height="388" width="683"]]
1421
1422
1423 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1424
1425 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L) and add DevEUI.(% style="display:none" %)
1426
1427 Search under The things network
1428
1429 [[image:1653356838789-523.png||height="337" width="740"]]
1430
1431
1432 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1433
1434 [[image:image-20220524094909-1.png||height="335" width="729"]]
1435
1436
1437 [[image:image-20220524094909-2.png||height="337" width="729"]]
1438
1439
1440 [[image:image-20220524094909-3.png||height="338" width="727"]]
1441
1442
1443 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1444
1445
1446 [[image:image-20220524094909-5.png||height="341" width="734"]]
1447
1448
1449 == 3.6 Interface Detail ==
1450
1451 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1452
1453
1454 Support NPN Type sensor
1455
1456 [[image:1653356991268-289.png]]
1457
1458
1459 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1460
1461
1462 (((
1463 The DI port of LT-22222-L can support **NPN** or **PNP** or **Dry Contact** output sensor.
1464 )))
1465
1466 (((
1467 (((
1468 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.
1469
1470
1471 )))
1472 )))
1473
1474 [[image:1653357170703-587.png]]
1475
1476 (((
1477 (((
1478 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1479 )))
1480 )))
1481
1482 (((
1483
1484 )))
1485
1486 (((
1487 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1488 )))
1489
1490 (((
1491 This type of sensor will output a low signal GND when active.
1492 )))
1493
1494 * (((
1495 Connect sensor's output to DI1-
1496 )))
1497 * (((
1498 Connect sensor's VCC to DI1+.
1499 )))
1500
1501 (((
1502 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1503 )))
1504
1505 (((
1506 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1507 )))
1508
1509 (((
1510 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.
1511 )))
1512
1513 (((
1514
1515 )))
1516
1517 (((
1518 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1519 )))
1520
1521 (((
1522 This type of sensor will output a high signal (example 24v) when active.
1523 )))
1524
1525 * (((
1526 Connect sensor's output to DI1+
1527 )))
1528 * (((
1529 Connect sensor's GND DI1-.
1530 )))
1531
1532 (((
1533 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1534 )))
1535
1536 (((
1537 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1538 )))
1539
1540 (((
1541 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.
1542 )))
1543
1544 (((
1545
1546 )))
1547
1548 (((
1549 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1550 )))
1551
1552 (((
1553 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1554 )))
1555
1556 * (((
1557 Connect sensor's output to DI1+ with a serial 50K resistor
1558 )))
1559 * (((
1560 Connect sensor's GND DI1-.
1561 )))
1562
1563 (((
1564 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1565 )))
1566
1567 (((
1568 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1569 )))
1570
1571 (((
1572 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.
1573 )))
1574
1575
1576 (% style="color:blue" %)**Example4**(%%): Connect to Dry Contact sensor
1577
1578 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.
1579
1580 To detect a Dry Contact, we can provide a power source to one pin of the Dry Contact. Below is a reference connection.
1581
1582 [[image:image-20230616235145-1.png]]
1583
1584
1585 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1586
1587
1588 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1589
1590 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1591
1592 [[image:1653357531600-905.png]]
1593
1594
1595 === 3.6.4 Analog Input Interface ===
1596
1597
1598 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:
1599
1600
1601 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1602
1603 [[image:1653357592296-182.png]]
1604
1605 Example to connect a 4~~20mA sensor
1606
1607 We take the wind speed sensor as an example for reference only.
1608
1609
1610 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1611
1612 (% style="color:red" %)**Red:  12~~24v**
1613
1614 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1615
1616 **Black:  GND**
1617
1618 **Connection diagram:**
1619
1620 [[image:1653357640609-758.png]]
1621
1622 [[image:1653357648330-671.png||height="155" width="733"]]
1623
1624
1625 Example connected to a regulated power supply to measure voltage
1626
1627 [[image:image-20230608101532-1.png||height="606" width="447"]]
1628
1629 [[image:image-20230608101608-2.jpeg||height="379" width="284"]]
1630
1631 [[image:image-20230608101722-3.png||height="102" width="1139"]]
1632
1633
1634 (% style="color:blue; font-weight:bold" %)**Specifications of the regulated power**(%%) (% style="color:blue" %)**:**
1635
1636 (% style="color:red" %)**Red:  12~~24v**
1637
1638 **Black:  GND**
1639
1640
1641 === 3.6.5 Relay Output ===
1642
1643
1644 (((
1645 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:
1646
1647 **Note**: RO pins go to Open(NO) when device is power off.
1648 )))
1649
1650 [[image:image-20220524100215-9.png]]
1651
1652
1653 [[image:image-20220524100215-10.png||height="382" width="723"]]
1654
1655
1656 == 3.7 LEDs Indicators ==
1657
1658
1659 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1660 |(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:470px" %)**Feature**
1661 |**PWR**|Always on if there is power
1662 |**SYS**|(((
1663 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.
1664 )))
1665 |**TX**|(((
1666 (((
1667 Device boot: TX blinks 5 times.
1668 )))
1669
1670 (((
1671 Successful join network: TX ON for 5 seconds.
1672 )))
1673
1674 (((
1675 Transmit a LoRa packet: TX blinks once
1676 )))
1677 )))
1678 |**RX**|RX blinks once when receive a packet.
1679 |**DO1**|
1680 |**DO2**|
1681 |**DO3**|
1682 |**DI2**|(((
1683 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1684 )))
1685 |**DI2**|(((
1686 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1687 )))
1688 |**DI2**|(((
1689 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1690 )))
1691 |**RO1**|
1692 |**RO2**|
1693
1694 = 4. Use AT Command =
1695
1696 == 4.1 Access AT Command ==
1697
1698
1699 (((
1700 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.
1701 )))
1702
1703 (((
1704
1705 )))
1706
1707 [[image:1653358238933-385.png]]
1708
1709
1710 (((
1711 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:
1712 )))
1713
1714 [[image:1653358355238-883.png]]
1715
1716
1717 (((
1718 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/]]
1719 )))
1720
1721 (((
1722 AT+<CMD>?        : Help on <CMD>
1723 )))
1724
1725 (((
1726 AT+<CMD>         : Run <CMD>
1727 )))
1728
1729 (((
1730 AT+<CMD>=<value> : Set the value
1731 )))
1732
1733 (((
1734 AT+<CMD>=?       :  Get the value
1735 )))
1736
1737 (((
1738 ATZ: Trig a reset of the MCU
1739 )))
1740
1741 (((
1742 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1743 )))
1744
1745 (((
1746 AT+DEUI: Get or Set the Device EUI
1747 )))
1748
1749 (((
1750 AT+DADDR: Get or Set the Device Address
1751 )))
1752
1753 (((
1754 AT+APPKEY: Get or Set the Application Key
1755 )))
1756
1757 (((
1758 AT+NWKSKEY: Get or Set the Network Session Key
1759 )))
1760
1761 (((
1762 AT+APPSKEY:  Get or Set the Application Session Key
1763 )))
1764
1765 (((
1766 AT+APPEUI:  Get or Set the Application EUI
1767 )))
1768
1769 (((
1770 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1771 )))
1772
1773 (((
1774 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1775 )))
1776
1777 (((
1778 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1779 )))
1780
1781 (((
1782 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1783 )))
1784
1785 (((
1786 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1787 )))
1788
1789 (((
1790 AT+RX2FQ: Get or Set the Rx2 window frequency
1791 )))
1792
1793 (((
1794 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1795 )))
1796
1797 (((
1798 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1799 )))
1800
1801 (((
1802 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1803 )))
1804
1805 (((
1806 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1807 )))
1808
1809 (((
1810 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1811 )))
1812
1813 (((
1814 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1815 )))
1816
1817 (((
1818 AT+NWKID: Get or Set the Network ID
1819 )))
1820
1821 (((
1822 AT+FCU: Get or Set the Frame Counter Uplink
1823 )))
1824
1825 (((
1826 AT+FCD: Get or Set the Frame Counter Downlink
1827 )))
1828
1829 (((
1830 AT+CLASS: Get or Set the Device Class
1831 )))
1832
1833 (((
1834 AT+JOIN: Join network
1835 )))
1836
1837 (((
1838 AT+NJS: Get OTAA Join Status
1839 )))
1840
1841 (((
1842 AT+SENDB: Send hexadecimal data along with the application port
1843 )))
1844
1845 (((
1846 AT+SEND: Send text data along with the application port
1847 )))
1848
1849 (((
1850 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1851 )))
1852
1853 (((
1854 AT+RECV: Print last received data in raw format
1855 )))
1856
1857 (((
1858 AT+VER:  Get current image version and Frequency Band
1859 )))
1860
1861 (((
1862 AT+CFM: Get or Set the confirmation mode (0-1)
1863 )))
1864
1865 (((
1866 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1867 )))
1868
1869 (((
1870 AT+SNR: Get the SNR of the last received packet
1871 )))
1872
1873 (((
1874 AT+RSSI: Get the RSSI of the last received packet
1875 )))
1876
1877 (((
1878 AT+TDC: Get or set the application data transmission interval in ms
1879 )))
1880
1881 (((
1882 AT+PORT: Get or set the application port
1883 )))
1884
1885 (((
1886 AT+DISAT: Disable AT commands
1887 )))
1888
1889 (((
1890 AT+PWORD: Set password, max 9 digits
1891 )))
1892
1893 (((
1894 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1895 )))
1896
1897 (((
1898 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1899 )))
1900
1901 (((
1902 AT+CFG: Print all settings
1903 )))
1904
1905
1906 == 4.2 Common AT Command Sequence ==
1907
1908 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1909
1910 (((
1911
1912
1913 (((
1914 (% style="color:blue" %)**If device has not joined network yet:**
1915 )))
1916 )))
1917
1918 (((
1919 (% style="background-color:#dcdcdc" %)**123456**
1920 )))
1921
1922 (((
1923 (% style="background-color:#dcdcdc" %)**AT+FDR**
1924 )))
1925
1926 (((
1927 (% style="background-color:#dcdcdc" %)**123456**
1928 )))
1929
1930 (((
1931 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1932 )))
1933
1934 (((
1935 (% style="background-color:#dcdcdc" %)**ATZ**
1936 )))
1937
1938
1939 (((
1940 (% style="color:blue" %)**If device already joined network:**
1941 )))
1942
1943 (((
1944 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1945 )))
1946
1947 (((
1948 (% style="background-color:#dcdcdc" %)**ATZ**
1949 )))
1950
1951
1952 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1953
1954 (((
1955
1956
1957 (((
1958 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
1959 )))
1960 )))
1961
1962 (((
1963 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
1964 )))
1965
1966 (((
1967 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
1968 )))
1969
1970 (((
1971 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
1972 )))
1973
1974 (((
1975 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
1976 )))
1977
1978 (((
1979 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
1980 )))
1981
1982 (((
1983 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
1984 )))
1985
1986 (((
1987 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
1988 )))
1989
1990 (((
1991 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
1992 )))
1993
1994 (((
1995 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
1996 )))
1997
1998 (((
1999 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
2000 )))
2001
2002 (((
2003 (% 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.
2004 )))
2005
2006 (((
2007 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2008
2009
2010 )))
2011
2012 (((
2013 (% style="color:red" %)**Note:**
2014 )))
2015
2016 (((
2017 **~1. Make sure the device is set to ABP mode in the IoT Server.**
2018
2019 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
2020
2021 **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?
2022 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2023
2024 **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.**
2025 )))
2026
2027 (((
2028 [[image:1653359097980-169.png||height="188" width="729"]]
2029 )))
2030
2031
2032 === 4.2.3 Change to Class A ===
2033
2034
2035 (((
2036 (% style="color:blue" %)**If sensor JOINED:**
2037
2038 (% style="background-color:#dcdcdc" %)**AT+CLASS=A**
2039
2040 (% style="background-color:#dcdcdc" %)**ATZ**
2041 )))
2042
2043
2044 = 5. Case Study =
2045
2046 == 5.1 Counting how many objects pass in Flow Line ==
2047
2048
2049 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
2050
2051
2052 = 6. FAQ =
2053
2054 == 6.1 How to upgrade the image? ==
2055
2056
2057 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2058
2059 * Support new features
2060 * For bug fix
2061 * Change LoRaWAN bands.
2062
2063 Below shows the hardware connection for how to upload an image to the LT:
2064
2065 [[image:1653359603330-121.png]]
2066
2067
2068 (((
2069 (% 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]].
2070 (% 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]].
2071 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2072
2073
2074 (((
2075 (% style="color:blue" %)**For LT-22222-L**(%%):
2076 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.
2077 )))
2078
2079
2080 )))
2081
2082 [[image:image-20220524103407-12.png]]
2083
2084
2085 [[image:image-20220524103429-13.png]]
2086
2087
2088 [[image:image-20220524104033-15.png]]
2089
2090
2091 (% 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:
2092
2093 [[image:1653360054704-518.png||height="186" width="745"]]
2094
2095
2096 (((
2097 (((
2098 == 6.2 How to change the LoRa Frequency Bands/Region? ==
2099
2100
2101 )))
2102 )))
2103
2104 (((
2105 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2106 )))
2107
2108 (((
2109
2110
2111 == 6.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2112
2113
2114 )))
2115
2116 (((
2117 (((
2118 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2119 )))
2120 )))
2121
2122 (((
2123 (((
2124 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2125
2126
2127 )))
2128 )))
2129
2130 (((
2131 (% 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.
2132
2133
2134 )))
2135
2136 (((
2137 [[image:1653360231087-571.png||height="401" width="727"]]
2138
2139
2140 )))
2141
2142 (((
2143 (% 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.**
2144 )))
2145
2146
2147
2148 (((
2149 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2150
2151
2152 )))
2153
2154 (((
2155 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2156
2157 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2158
2159 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2160
2161 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2162
2163 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2164
2165 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2166
2167 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2168
2169 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2170
2171 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2172 )))
2173
2174
2175 (((
2176 As shown in below:
2177 )))
2178
2179 [[image:1653360498588-932.png||height="485" width="726"]]
2180
2181
2182 == 6.4 How to change the uplink interval? ==
2183
2184
2185 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/]]
2186
2187
2188 == 6.5 Can I see counting event in Serial? ==
2189
2190
2191 (((
2192 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.
2193
2194
2195 == 6.6 Can i use point to point communication for LT-22222-L? ==
2196
2197
2198 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]].
2199
2200
2201 )))
2202
2203 (((
2204 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2205
2206
2207 If the device is not shut down, but directly powered off.
2208
2209 It will default that this is a power-off state.
2210
2211 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2212
2213 After restart, the status before power failure will be read from flash.
2214
2215
2216 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2217
2218
2219 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2220
2221
2222 [[image:image-20221006170630-1.png||height="610" width="945"]]
2223
2224
2225 == 6.9 Can LT22222-L save RO state? ==
2226
2227
2228 Firmware version needs to be no less than 1.6.0.
2229
2230
2231 == 6.10 Why does the LT22222 always report 15.585V when measuring AVI? ==
2232
2233
2234 It is likely that the GND is not connected during the measurement, or the wire connected to the GND is loose.
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 == 7.4 Why can LT22222 perform Uplink normally, but cannot receive Downlink? ==
2278
2279
2280 The FCD count of the gateway is inconsistent with the FCD count of the node, causing the downlink to remain in the queue state.
2281 Use this command to bring their counts back together: [[Resets the downlink packet count>>||anchor="H3.4.2.23Resetsthedownlinkpacketcount"]]
2282
2283
2284 = 8. Order Info =
2285
2286
2287 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2288
2289 (% style="color:#4f81bd" %)**XXX:**
2290
2291 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2292 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2293 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2294 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2295 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2296 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2297 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2298 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2299 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2300
2301 = 9. Packing Info =
2302
2303
2304 **Package Includes**:
2305
2306 * LT-22222-L I/O Controller x 1
2307 * Stick Antenna for LoRa RF part x 1
2308 * Bracket for controller x1
2309 * Program cable x 1
2310
2311 **Dimension and weight**:
2312
2313 * Device Size: 13.5 x 7 x 3 cm
2314 * Device Weight: 105g
2315 * Package Size / pcs : 14.5 x 8 x 5 cm
2316 * Weight / pcs : 170g
2317
2318 = 10. Support =
2319
2320
2321 * (((
2322 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.
2323 )))
2324 * (((
2325 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]]
2326
2327
2328
2329 )))
2330
2331 = 11. Reference​​​​​ =
2332
2333
2334 * 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]]
2335 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2336 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2337
2338

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