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Version 133.1 by Edwin Chen on 2024/05/08 22:27
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
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9
10 **Table of Contents:**
11
12 {{toc/}}
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18
19
20 = 1.Introduction =
21
22 == 1.1 What is LT Series I/O Controller ==
23
24 (((
25
26
27 (((
28 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.
29 )))
30 )))
31
32 (((
33 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.
34 )))
35
36 (((
37 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
38 )))
39
40 (((
41 The use environment includes:
42 )))
43
44 (((
45 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.
46 )))
47
48 (((
49 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
50
51
52 )))
53
54 (((
55 [[image:1653295757274-912.png]]
56
57
58 )))
59
60 == 1.2 Specifications ==
61
62 (% style="color:#037691" %)**Hardware System:**
63
64 * STM32L072xxxx MCU
65 * SX1276/78 Wireless Chip 
66 * Power Consumption:
67
68 * Idle: 4mA@12v
69 * 20dB Transmit: [[34mA@12v>>mailto:34mA@12v]]
70
71
72 (% style="color:#037691" %)**Interface for Model: LT22222-L:**
73
74 * 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
75 * 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
76 * 2 x Relay Output (5A@250VAC / 30VDC)
77 * 2 x 0~~20mA Analog Input (res:0.01mA)
78 * 2 x 0~~30V Analog Input (res:0.01v)
79 * Power Input 7~~ 24V DC. 
80
81
82 (% style="color:#037691" %)**LoRa Spec:**
83
84
85 * (((
86 (((
87 Frequency Range:
88 )))
89
90 * (((
91 Band 1 (HF): 862 ~~ 1020 Mhz
92 )))
93 * (((
94 Band 2 (LF): 410 ~~ 528 Mhz
95 )))
96 )))
97 * (((
98 168 dB maximum link budget.
99 )))
100 * (((
101 +20 dBm - 100 mW constant RF output vs.
102 )))
103 * (((
104 +14 dBm high efficiency PA.
105 )))
106 * (((
107 Programmable bit rate up to 300 kbps.
108 )))
109 * (((
110 High sensitivity: down to -148 dBm.
111 )))
112 * (((
113 Bullet-proof front end: IIP3 = -12.5 dBm.
114 )))
115 * (((
116 Excellent blocking immunity.
117 )))
118 * (((
119 Low RX current of 10.3 mA, 200 nA register retention.
120 )))
121 * (((
122 Fully integrated synthesizer with a resolution of 61 Hz.
123 )))
124 * (((
125 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
126 )))
127 * (((
128 Built-in bit synchronizer for clock recovery.
129 )))
130 * (((
131 Preamble detection.
132 )))
133 * (((
134 127 dB Dynamic Range RSSI.
135 )))
136 * (((
137 Automatic RF Sense and CAD with ultra-fast AFC.
138 )))
139 * (((
140 Packet engine up to 256 bytes with CRC.
141
142
143
144 )))
145
146 == 1.3 Features ==
147
148
149 * LoRaWAN Class A & Class C protocol
150
151 * Optional Customized LoRa Protocol
152
153 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
154
155 * AT Commands to change parameters
156
157 * Remote configure parameters via LoRa Downlink
158
159 * Firmware upgradable via program port
160
161 * Counting
162
163 == 1.4 Applications ==
164
165
166 * Smart Buildings & Home Automation
167
168 * Logistics and Supply Chain Management
169
170 * Smart Metering
171
172 * Smart Agriculture
173
174 * Smart Cities
175
176 * Smart Factory
177
178 == 1.5 Hardware Variants ==
179
180
181 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
182 |(% 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**
183 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)(((
184 (% style="text-align:center" %)
185 [[image:image-20230424115112-1.png||height="106" width="58"]]
186 )))|(% style="width:334px" %)(((
187 * 2 x Digital Input (Bi-direction)
188 * 2 x Digital Output
189 * 2 x Relay Output (5A@250VAC / 30VDC)
190 * 2 x 0~~20mA Analog Input (res:0.01mA)
191 * 2 x 0~~30V Analog Input (res:0.01v)
192 * 1 x Counting Port
193 )))
194
195 = 2. Power ON Device =
196
197
198 (((
199 The LT controller can be powered by 7 ~~ 24V DC power source. Connect VIN to Power Input V+ and GND to power input V- to power the LT controller.
200 )))
201
202 (((
203 PWR will on when device is properly powered.
204
205
206 )))
207
208 [[image:1653297104069-180.png]]
209
210
211 = 3. Operation Mode =
212
213 == 3.1 How it works? ==
214
215
216 (((
217 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. 
218 )))
219
220 (((
221 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.
222 )))
223
224
225 == 3.2 Example to join LoRaWAN network ==
226
227
228 (((
229 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. 
230
231
232 )))
233
234 [[image:image-20220523172350-1.png||height="266" width="864"]]
235
236
237 (((
238 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:
239
240
241 )))
242
243 (((
244 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
245 )))
246
247 (((
248 Each LT is shipped with a sticker with the default device EUI as below:
249 )))
250
251 [[image:image-20230425173427-2.png||height="246" width="530"]]
252
253
254 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
255
256 **Add APP EUI in the application.**
257
258 [[image:1653297955910-247.png||height="321" width="716"]]
259
260
261 **Add APP KEY and DEV EUI**
262
263 [[image:1653298023685-319.png]]
264
265
266 (((
267 (% 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.
268
269
270 )))
271
272 [[image:1653298044601-602.png||height="405" width="709"]]
273
274
275 == 3.3 Uplink Payload ==
276
277
278 There are five working modes + one interrupt mode on LT for different type application:
279
280 * (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
281
282 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
283
284 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
285
286 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
287
288 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
289
290 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
291
292 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
293
294
295 (((
296 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
297
298 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
299 |(% 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**
300 |Value|(((
301 AVI1 voltage
302 )))|(((
303 AVI2 voltage
304 )))|(((
305 ACI1 Current
306 )))|(((
307 ACI2 Current
308 )))|DIDORO*|(((
309 Reserve
310 )))|MOD
311 )))
312
313 (((
314 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
315
316 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
317 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
318 |RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
319 )))
320
321 * RO is for relay. ROx=1 : close, ROx=0 always open.
322 * DI is for digital input. DIx=1: high or float, DIx=0: low.
323 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
324
325 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
326
327 For example if payload is: [[image:image-20220523175847-2.png]]
328
329
330 **The value for the interface is:  **
331
332 AVI1 channel voltage is 0x04AB/1000=1195(DEC)/1000=1.195V
333
334 AVI2 channel voltage is 0x04AC/1000=1.196V
335
336 ACI1 channel current is 0x1310/1000=4.880mA
337
338 ACI2 channel current is 0x1300/1000=4.864mA
339
340 The last byte 0xAA= 10101010(B) means
341
342 * [1] RO1 relay channel is close and the RO1 LED is ON.
343 * [0] RO2 relay channel is open and RO2 LED is OFF;
344
345 **LT22222-L:**
346
347 * [1] DI2 channel is high input and DI2 LED is ON;
348 * [0] DI1 channel is low input;
349
350 * [0] DO3 channel output state
351 ** DO3 is float in case no load between DO3 and V+.;
352 ** DO3 is high in case there is load between DO3 and V+.
353 ** DO3 LED is off in both case
354 * [1] DO2 channel output is low and DO2 LED is ON.
355 * [0] DO1 channel output state
356 ** DO1 is float in case no load between DO1 and V+.;
357 ** DO1 is high in case there is load between DO1 and V+.
358 ** DO1 LED is off in both case
359
360 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
361
362
363 (((
364 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
365 )))
366
367 (((
368 Total : 11 bytes payload
369
370 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
371 |(% 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**
372 |Value|COUNT1|COUNT2 |DIDORO*|(((
373 Reserve
374 )))|MOD
375 )))
376
377 (((
378 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
379
380 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
381 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
382 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
383
384 RO is for relay. ROx=1 : close , ROx=0 always open.
385 )))
386
387 * FIRST: Indicate this is the first packet after join network.
388 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
389
390 (((
391 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
392
393
394 )))
395
396 (((
397 **To use counting mode, please run:**
398 )))
399
400 (((
401 (% class="box infomessage" %)
402 (((
403 **AT+MOD=2**
404
405 **ATZ**
406 )))
407 )))
408
409 (((
410
411
412 (% style="color:#4f81bd" %)**AT Commands for counting:**
413 )))
414
415 (((
416 **For LT22222-L:**
417
418 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
419
420 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
421
422 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
423
424 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
425
426 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
427
428 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
429 )))
430
431
432 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
433
434
435 **LT22222-L**: This mode the DI1 is used as a counting pin.
436
437 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
438 |(% 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**
439 |Value|COUNT1|(((
440 ACI1 Current
441 )))|(((
442 ACI2 Current
443 )))|DIDORO*|Reserve|MOD
444
445 (((
446 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
447
448 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
449 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
450 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
451 )))
452
453 * RO is for relay. ROx=1 : close, ROx=0 always open.
454 * FIRST: Indicate this is the first packet after join network.
455 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
456
457 (((
458 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
459 )))
460
461
462 (((
463 **To use counting mode, please run:**
464 )))
465
466 (((
467 (% class="box infomessage" %)
468 (((
469 **AT+MOD=3**
470
471 **ATZ**
472 )))
473 )))
474
475 (((
476 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
477 )))
478
479
480 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
481
482
483 (((
484 **LT22222-L**: This mode the DI1 is used as a counting pin.
485 )))
486
487 (((
488 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.
489
490 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
491 |(% 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**
492 |Value|COUNT1|AVI1 Counting|DIDORO*|(((
493 Reserve
494 )))|MOD
495 )))
496
497 (((
498 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
499
500 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
501 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
502 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
503 )))
504
505 * RO is for relay. ROx=1 : close, ROx=0 always open.
506 * FIRST: Indicate this is the first packet after join network.
507 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
508
509 (((
510 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
511
512
513 )))
514
515 (((
516 **To use this mode, please run:**
517 )))
518
519 (((
520 (% class="box infomessage" %)
521 (((
522 **AT+MOD=4**
523
524 **ATZ**
525 )))
526 )))
527
528 (((
529 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
530 )))
531
532 (((
533 **Plus below command for AVI1 Counting:**
534
535 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
536
537 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
538
539 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
540
541 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
542 )))
543
544
545 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
546
547
548 **LT22222-L**: This mode the DI1 is used as a counting pin.
549
550 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
551 |(% 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**
552 |Value|(((
553 AVI1 voltage
554 )))|(((
555 AVI2 voltage
556 )))|(((
557 ACI1 Current
558 )))|COUNT1|DIDORO*|(((
559 Reserve
560 )))|MOD
561
562 (((
563 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
564
565 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
566 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
567 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
568 )))
569
570 * RO is for relay. ROx=1 : close, ROx=0 always open.
571 * FIRST: Indicate this is the first packet after join network.
572 * (((
573 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
574 )))
575
576 (((
577 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
578 )))
579
580 (((
581 **To use this mode, please run:**
582 )))
583
584 (((
585 (% class="box infomessage" %)
586 (((
587 **AT+MOD=5**
588
589 **ATZ**
590 )))
591 )))
592
593 (((
594 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
595 )))
596
597
598 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
599
600
601 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
602
603 For example, if user has configured below commands:
604
605 * **AT+MOD=1 ** **~-~->**  The normal working mode
606 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
607
608 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
609
610 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
611 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.**
612
613 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
614
615
616 (% style="color:#4f81bd" %)**Trigger base on voltage**:
617
618 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
619
620
621 **Example:**
622
623 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)
624
625 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
626
627
628
629 (% style="color:#4f81bd" %)**Trigger base on current**:
630
631 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
632
633
634 **Example:**
635
636 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
637
638
639
640 (% style="color:#4f81bd" %)**Trigger base on DI status**:
641
642 DI status trigger Flag.
643
644 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
645
646
647 **Example:**
648
649 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
650
651
652 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
653
654 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
655
656 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
657
658 AA: Code for this downlink Command:
659
660 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
661
662 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
663
664 yy2 yy2: AC1 or AV1 high limit.
665
666 yy3 yy3: AC2 or AV2 low limit.
667
668 Yy4 yy4: AC2 or AV2 high limit.
669
670
671 **Example1**: AA 00 13 88 00 00 00 00 00 00
672
673 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
674
675
676 **Example2**: AA 02 01 00
677
678 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
679
680
681
682 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
683
684 MOD6 Payload : total 11 bytes payload
685
686 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
687 |(% 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**
688 |Value|(((
689 TRI_A FLAG
690 )))|(((
691 TRI_A Status
692 )))|(((
693 TRI_DI FLAG+STA
694 )))|Reserve|Enable/Disable MOD6|(((
695 MOD(6)
696 )))
697
698 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
699
700 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
701 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
702 |(((
703 AV1_LOW
704 )))|(((
705 AV1_HIGH
706 )))|(((
707 AV2_LOW
708 )))|(((
709 AV2_HIGH
710 )))|(((
711 AC1_LOW
712 )))|(((
713 AC1_HIGH
714 )))|(((
715 AC2_LOW
716 )))|(((
717 AC2_HIGH
718 )))
719
720 * Each bits shows if the corresponding trigger has been configured.
721
722 **Example:**
723
724 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
725
726
727 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. 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 which status has been trigger on this uplink.
750
751 **Example:**
752
753 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
754
755
756 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)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 |N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
761
762 * Each bits shows which status has been trigger on this uplink.
763
764 **Example:**
765
766 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
767
768 00000101: Means both DI1 and DI2 trigger are enabled.
769
770
771 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
772
773 Downlink command to poll MOD6 status:
774
775 **AB 06**
776
777 When device got this command, it will send the MOD6 payload.
778
779
780 === 3.3.7 Payload Decoder ===
781
782 (((
783
784
785 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
786 )))
787
788
789 == 3.4 ​Configure LT via AT or Downlink ==
790
791
792 (((
793 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
794 )))
795
796 (((
797 (((
798 There are two kinds of Commands:
799 )))
800 )))
801
802 * (% 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]]
803
804 * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
805
806 === 3.4.1 Common Commands ===
807
808
809 (((
810 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]]
811 )))
812
813
814 === 3.4.2 Sensor related commands ===
815
816 ==== 3.4.2.1 Set Transmit Interval ====
817
818
819 Set device uplink interval.
820
821 * (% style="color:#037691" %)**AT Command:**
822
823 (% style="color:blue" %)**AT+TDC=N **
824
825
826 **Example: **AT+TDC=30000. Means set interval to 30 seconds
827
828
829 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
830
831 (% style="color:blue" %)**0x01 aa bb cc  **(%%)** ~/~/ Same as AT+TDC=0x(aa bb cc)**
832
833
834
835 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
836
837
838 Set work mode.
839
840 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+MOD=N  **
841
842 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
843
844 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
845
846 (% style="color:blue" %)**0x0A aa  **(%%)** ** ~/~/ Same as AT+MOD=aa
847
848
849
850 ==== 3.4.2.3 Poll an uplink ====
851
852
853 * (% style="color:#037691" %)**AT Command:**(%%) There is no AT Command to poll uplink
854
855 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
856
857 (% style="color:blue" %)**0x08 FF  **(%%)** **~/~/ Poll an uplink
858
859 **Example**: 0x08FF, ask device to send an Uplink
860
861
862
863 ==== 3.4.2.4 Enable Trigger Mode ====
864
865
866 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
867
868 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ADDMOD6=1 or 0**
869
870 (% style="color:red" %)**1:** (%%)Enable Trigger Mode
871
872 (% style="color:red" %)**0: **(%%)Disable Trigger Mode
873
874
875 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
876
877 (% style="color:blue" %)**0x0A 06 aa    **(%%) ~/~/ Same as AT+ADDMOD6=aa
878
879
880
881 ==== 3.4.2.5 Poll trigger settings ====
882
883
884 Poll trigger settings
885
886 * (% style="color:#037691" %)**AT Command:**
887
888 There is no AT Command for this feature.
889
890 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
891
892 (% style="color:blue" %)**0xAB 06  ** (%%) ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
893
894
895
896 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
897
898
899 Enable Disable DI1/DI2/DI2 as trigger,
900
901 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
902
903 **Example:** AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
904
905
906 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
907
908 (% style="color:blue" %)**0xAA 02 aa bb   ** (%%) ~/~/ Same as AT+DTRI=aa,bb
909
910
911
912 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
913
914
915 Set DI1 or DI3(for LT-33222-L) trigger.
916
917 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG1=a,b**
918
919 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
920
921 (% style="color:red" %)**b :** (%%)delay timing.
922
923 **Example:** AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
924
925
926 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
927
928 (% style="color:blue" %)**0x09 01 aa bb cc    ** (%%) ~/~/ same as AT+TRIG1=aa,0x(bb cc)
929
930
931
932 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
933
934
935 Set DI2 trigger.
936
937 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG2=a,b**
938
939 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
940
941 (% style="color:red" %)**b :** (%%)delay timing.
942
943 **Example:** AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
944
945
946 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
947
948 (% style="color:blue" %)**0x09 02 aa bb cc   ** (%%)~/~/ same as AT+TRIG2=aa,0x(bb cc)
949
950
951
952 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
953
954
955 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
956
957 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ACLIM**
958
959 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
960
961 (% 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"]]
962
963
964
965 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
966
967
968 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
969
970 * (% style="color:#037691" %)**AT Command**(%%): (% style="color:blue" %)**AT+AVLIM    **(%%)** See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
971
972 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
973
974 (% 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"]]
975
976
977
978 ==== 3.4.2.11 Trigger – Set minimum interval ====
979
980
981 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
982
983 * (% 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.
984
985 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
986
987 (% style="color:blue" %)**0x AC aa bb   **(%%) ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
988
989 (((
990 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
991 )))
992
993
994
995 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
996
997
998 * (% style="color:#037691" %)**AT Command**
999
1000 There is no AT Command to control Digital Output
1001
1002
1003 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1004
1005 (% style="color:blue" %)**0x02 aa bb cc     ** (%%)~/~/ Set DO1/DO2/DO3 output
1006
1007 (((
1008 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1009 )))
1010
1011 (((
1012 01: Low,  00: High ,  11: No action
1013
1014 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1015 |(% 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**
1016 |02  01  00  11|Low|High|No Action
1017 |02  00  11  01|High|No Action|Low
1018 |02  11  01  00|No Action|Low|High
1019 )))
1020
1021 (((
1022 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1023 )))
1024
1025 (((
1026 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1027 )))
1028
1029
1030
1031 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
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 0xA9)**
1040
1041 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1042
1043
1044 This is to control the digital output time of DO pin. Include four bytes:
1045
1046 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1047
1048 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1049
1050 01: DO pins will change back to original state after timeout.
1051
1052 00: DO pins will change to an inverter state after timeout 
1053
1054
1055 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1056
1057 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1058 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1059 |0x01|DO1 set to low
1060 |0x00|DO1 set to high
1061 |0x11|DO1 NO Action
1062
1063 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1064
1065 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1066 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1067 |0x01|DO2 set to low
1068 |0x00|DO2 set to high
1069 |0x11|DO2 NO Action
1070
1071 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1072
1073 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1074 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1075 |0x01|DO3 set to low
1076 |0x00|DO3 set to high
1077 |0x11|DO3 NO Action
1078
1079 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:(%%) Latching time. Unit: ms
1080
1081
1082 (% style="color:red" %)**Note: **
1083
1084 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1085
1086 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1087
1088 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1089
1090
1091 **Example payload:**
1092
1093 **~1. A9 01 01 01 01 07 D0**
1094
1095 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1096
1097 **2. A9 01 00 01 11 07 D0**
1098
1099 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1100
1101 **3. A9 00 00 00 00 07 D0**
1102
1103 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1104
1105 **4. A9 00 11 01 00 07 D0**
1106
1107 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
1108
1109
1110
1111 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1112
1113
1114 * (% style="color:#037691" %)**AT Command:**
1115
1116 There is no AT Command to control Relay Output
1117
1118
1119 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1120
1121 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1122
1123
1124 (((
1125 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1126 )))
1127
1128 (((
1129 00: Close ,  01: Open , 11: No action
1130
1131 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1132 |(% style="background-color:#4f81bd; color:white" %)**Downlink Code**|(% style="background-color:#4f81bd; color:white" %)**RO1**|(% style="background-color:#4f81bd; color:white" %)**RO2**
1133 |03  00  11|Open|No Action
1134 |03  01  11|Close|No Action
1135 |03  11  00|No Action|Open
1136 |03  11  01|No Action|Close
1137 |03  00  00|Open|Open
1138 |03  01  01|Close|Close
1139 |03  01  00|Close|Open
1140 |03  00  01|Open|Close
1141 )))
1142
1143 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1144
1145
1146
1147 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
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 0x05):**
1156
1157 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1158
1159
1160 This is to control the relay output time of relay. Include four bytes:
1161
1162 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1163
1164 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1165
1166 01: Relays will change back to original state after timeout.
1167
1168 00: Relays will change to an inverter state after timeout
1169
1170
1171 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1172
1173 [[image:image-20221008095908-1.png||height="364" width="564"]]
1174
1175
1176 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1177
1178
1179 (% style="color:red" %)**Note:**
1180
1181 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1182
1183 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1184
1185
1186 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1187
1188
1189 **Example payload:**
1190
1191 **~1. 05 01 11 07 D0**
1192
1193 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1194
1195 **2. 05 01 10 07 D0**
1196
1197 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1198
1199 **3. 05 00 01 07 D0**
1200
1201 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1202
1203 **4. 05 00 00 07 D0**
1204
1205 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1206
1207
1208
1209 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1210
1211
1212 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1213
1214 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1215
1216 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1217
1218 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1219
1220
1221
1222 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1223
1224
1225 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1226
1227 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1228
1229 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1230
1231
1232 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1233
1234 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1235
1236
1237
1238 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1239
1240
1241 Clear counting for counting mode
1242
1243 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+CLRCOUNT         **(%%) ~/~/ clear all counting
1244
1245 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1246
1247 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1248
1249
1250
1251 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1252
1253
1254 * (% style="color:#037691" %)**AT Command:**
1255
1256 (% 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)
1257
1258
1259 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1260
1261 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1262
1263 (((
1264 range: aa bb cc:0 to 16777215,  (unit:second)
1265 )))
1266
1267
1268
1269 ==== 3.4.2.20 Reset save RO DO state ====
1270
1271
1272 * (% style="color:#037691" %)**AT Command:**
1273
1274 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1275
1276 (% 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.
1277
1278
1279 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1280
1281 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1282
1283
1284
1285 ==== 3.4.2.21 Encrypted payload ====
1286
1287
1288 * (% style="color:#037691" %)**AT Command:**
1289
1290 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1291
1292 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1293
1294
1295
1296 ==== 3.4.2.22 Get sensor value ====
1297
1298
1299 * (% style="color:#037691" %)**AT Command:**
1300
1301 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1302
1303 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1304
1305
1306
1307 ==== 3.4.2.23 Resets the downlink packet count ====
1308
1309
1310 * (% style="color:#037691" %)**AT Command:**
1311
1312 (% 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)
1313
1314 (% 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.
1315
1316
1317
1318 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1319
1320
1321 * (% style="color:#037691" %)**AT Command:**
1322
1323 (% 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)
1324
1325 (% 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.
1326
1327
1328 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1329
1330 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1331
1332
1333
1334 ==== 3.4.2.25 Copy downlink to uplink ====
1335
1336
1337 * (% style="color:#037691" %)**AT Command**(%%)**:**
1338
1339 (% 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.
1340
1341 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.
1342
1343
1344 [[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"]]
1345
1346 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1347
1348
1349
1350 [[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"]]
1351
1352 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1353
1354
1355
1356 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1357
1358
1359 * (((
1360 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1361
1362 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1363
1364
1365 )))
1366
1367 **Example：**
1368
1369 [[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"]]
1370
1371
1372 == 3.5 Integrate with Mydevice ==
1373
1374
1375 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:
1376
1377 (((
1378 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1379 )))
1380
1381 (((
1382 (% 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:
1383
1384
1385 )))
1386
1387 [[image:image-20220719105525-1.png||height="377" width="677"]]
1388
1389
1390
1391 [[image:image-20220719110247-2.png||height="388" width="683"]]
1392
1393
1394 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1395
1396 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L) and add DevEUI.(% style="display:none" %)
1397
1398 Search under The things network
1399
1400 [[image:1653356838789-523.png||height="337" width="740"]]
1401
1402
1403 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1404
1405 [[image:image-20220524094909-1.png||height="335" width="729"]]
1406
1407
1408 [[image:image-20220524094909-2.png||height="337" width="729"]]
1409
1410
1411 [[image:image-20220524094909-3.png||height="338" width="727"]]
1412
1413
1414 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1415
1416
1417 [[image:image-20220524094909-5.png||height="341" width="734"]]
1418
1419
1420 == 3.6 Interface Detail ==
1421
1422 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1423
1424
1425 Support NPN Type sensor
1426
1427 [[image:1653356991268-289.png]]
1428
1429
1430 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1431
1432
1433 (((
1434 The DI port of LT-22222-L can support **NPN** or **PNP** or **Dry Contact** output sensor.
1435 )))
1436
1437 (((
1438 (((
1439 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.
1440
1441
1442 )))
1443 )))
1444
1445 [[image:1653357170703-587.png]]
1446
1447 (((
1448 (((
1449 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1450 )))
1451 )))
1452
1453 (((
1454
1455 )))
1456
1457 (((
1458 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1459 )))
1460
1461 (((
1462 This type of sensor will output a low signal GND when active.
1463 )))
1464
1465 * (((
1466 Connect sensor's output to DI1-
1467 )))
1468 * (((
1469 Connect sensor's VCC to DI1+.
1470 )))
1471
1472 (((
1473 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1474 )))
1475
1476 (((
1477 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1478 )))
1479
1480 (((
1481 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.
1482 )))
1483
1484 (((
1485
1486 )))
1487
1488 (((
1489 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1490 )))
1491
1492 (((
1493 This type of sensor will output a high signal (example 24v) when active.
1494 )))
1495
1496 * (((
1497 Connect sensor's output to DI1+
1498 )))
1499 * (((
1500 Connect sensor's GND DI1-.
1501 )))
1502
1503 (((
1504 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1505 )))
1506
1507 (((
1508 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1509 )))
1510
1511 (((
1512 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.
1513 )))
1514
1515 (((
1516
1517 )))
1518
1519 (((
1520 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1521 )))
1522
1523 (((
1524 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1525 )))
1526
1527 * (((
1528 Connect sensor's output to DI1+ with a serial 50K resistor
1529 )))
1530 * (((
1531 Connect sensor's GND DI1-.
1532 )))
1533
1534 (((
1535 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1536 )))
1537
1538 (((
1539 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1540 )))
1541
1542 (((
1543 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.
1544 )))
1545
1546
1547 (% style="color:blue" %)**Example4**(%%): Connect to Dry Contact sensor
1548
1549 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.
1550
1551 To detect a Dry Contact, we can provide a power source to one pin of the Dry Contact. Below is a reference connection.
1552
1553 [[image:image-20230616235145-1.png]]
1554
1555 (% style="color:blue" %)**Example5**(%%): Connect to Open Colleactor
1556
1557 [[image:image-20240219115718-1.png]]
1558
1559
1560 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1561
1562
1563 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1564
1565 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1566
1567 [[image:1653357531600-905.png]]
1568
1569
1570 === 3.6.4 Analog Input Interface ===
1571
1572
1573 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:
1574
1575
1576 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1577
1578 [[image:1653357592296-182.png]]
1579
1580 Example to connect a 4~~20mA sensor
1581
1582 We take the wind speed sensor as an example for reference only.
1583
1584
1585 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1586
1587 (% style="color:red" %)**Red:  12~~24v**
1588
1589 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1590
1591 **Black:  GND**
1592
1593 **Connection diagram:**
1594
1595 [[image:1653357640609-758.png]]
1596
1597 [[image:1653357648330-671.png||height="155" width="733"]]
1598
1599
1600 Example connected to a regulated power supply to measure voltage
1601
1602 [[image:image-20230608101532-1.png||height="606" width="447"]]
1603
1604 [[image:image-20230608101608-2.jpeg||height="379" width="284"]]
1605
1606 [[image:image-20230608101722-3.png||height="102" width="1139"]]
1607
1608
1609 (% style="color:blue; font-weight:bold" %)**Specifications of the regulated power**(%%) (% style="color:blue" %)**:**
1610
1611 (% style="color:red" %)**Red:  12~~24v**
1612
1613 **Black:  GND**
1614
1615
1616 === 3.6.5 Relay Output ===
1617
1618
1619 (((
1620 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:
1621
1622 **Note**: RO pins go to Open(NO) when device is power off.
1623 )))
1624
1625 [[image:image-20220524100215-9.png]]
1626
1627
1628 [[image:image-20220524100215-10.png||height="382" width="723"]]
1629
1630
1631 == 3.7 LEDs Indicators ==
1632
1633
1634 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
1635 |(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:460px" %)**Feature**
1636 |**PWR**|Always on if there is power
1637 |**SYS**|(((
1638 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.
1639 )))
1640 |**TX**|(((
1641 (((
1642 Device boot: TX blinks 5 times.
1643 )))
1644
1645 (((
1646 Successful join network: TX ON for 5 seconds.
1647 )))
1648
1649 (((
1650 Transmit a LoRa packet: TX blinks once
1651 )))
1652 )))
1653 |**RX**|RX blinks once when receive a packet.
1654 |**DO1**|
1655 |**DO2**|
1656 |**DO3**|
1657 |**DI2**|(((
1658 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1659 )))
1660 |**DI2**|(((
1661 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1662 )))
1663 |**DI2**|(((
1664 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1665 )))
1666 |**RO1**|
1667 |**RO2**|
1668
1669 = 4. Use AT Command =
1670
1671 == 4.1 Access AT Command ==
1672
1673
1674 (((
1675 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.
1676 )))
1677
1678 [[image:1653358238933-385.png]]
1679
1680
1681 (((
1682 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:
1683 )))
1684
1685 [[image:1653358355238-883.png]]
1686
1687
1688 (((
1689 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/]]
1690 )))
1691
1692 (((
1693 AT+<CMD>?        : Help on <CMD>
1694 )))
1695
1696 (((
1697 AT+<CMD>         : Run <CMD>
1698 )))
1699
1700 (((
1701 AT+<CMD>=<value> : Set the value
1702 )))
1703
1704 (((
1705 AT+<CMD>=?       :  Get the value
1706 )))
1707
1708 (((
1709 ATZ: Trig a reset of the MCU
1710 )))
1711
1712 (((
1713 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1714 )))
1715
1716 (((
1717 AT+DEUI: Get or Set the Device EUI
1718 )))
1719
1720 (((
1721 AT+DADDR: Get or Set the Device Address
1722 )))
1723
1724 (((
1725 AT+APPKEY: Get or Set the Application Key
1726 )))
1727
1728 (((
1729 AT+NWKSKEY: Get or Set the Network Session Key
1730 )))
1731
1732 (((
1733 AT+APPSKEY:  Get or Set the Application Session Key
1734 )))
1735
1736 (((
1737 AT+APPEUI:  Get or Set the Application EUI
1738 )))
1739
1740 (((
1741 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1742 )))
1743
1744 (((
1745 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1746 )))
1747
1748 (((
1749 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1750 )))
1751
1752 (((
1753 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1754 )))
1755
1756 (((
1757 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1758 )))
1759
1760 (((
1761 AT+RX2FQ: Get or Set the Rx2 window frequency
1762 )))
1763
1764 (((
1765 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1766 )))
1767
1768 (((
1769 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1770 )))
1771
1772 (((
1773 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1774 )))
1775
1776 (((
1777 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1778 )))
1779
1780 (((
1781 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1782 )))
1783
1784 (((
1785 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1786 )))
1787
1788 (((
1789 AT+NWKID: Get or Set the Network ID
1790 )))
1791
1792 (((
1793 AT+FCU: Get or Set the Frame Counter Uplink
1794 )))
1795
1796 (((
1797 AT+FCD: Get or Set the Frame Counter Downlink
1798 )))
1799
1800 (((
1801 AT+CLASS: Get or Set the Device Class
1802 )))
1803
1804 (((
1805 AT+JOIN: Join network
1806 )))
1807
1808 (((
1809 AT+NJS: Get OTAA Join Status
1810 )))
1811
1812 (((
1813 AT+SENDB: Send hexadecimal data along with the application port
1814 )))
1815
1816 (((
1817 AT+SEND: Send text data along with the application port
1818 )))
1819
1820 (((
1821 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1822 )))
1823
1824 (((
1825 AT+RECV: Print last received data in raw format
1826 )))
1827
1828 (((
1829 AT+VER:  Get current image version and Frequency Band
1830 )))
1831
1832 (((
1833 AT+CFM: Get or Set the confirmation mode (0-1)
1834 )))
1835
1836 (((
1837 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1838 )))
1839
1840 (((
1841 AT+SNR: Get the SNR of the last received packet
1842 )))
1843
1844 (((
1845 AT+RSSI: Get the RSSI of the last received packet
1846 )))
1847
1848 (((
1849 AT+TDC: Get or set the application data transmission interval in ms
1850 )))
1851
1852 (((
1853 AT+PORT: Get or set the application port
1854 )))
1855
1856 (((
1857 AT+DISAT: Disable AT commands
1858 )))
1859
1860 (((
1861 AT+PWORD: Set password, max 9 digits
1862 )))
1863
1864 (((
1865 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1866 )))
1867
1868 (((
1869 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1870 )))
1871
1872 (((
1873 AT+CFG: Print all settings
1874 )))
1875
1876
1877 == 4.2 Common AT Command Sequence ==
1878
1879 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1880
1881 (((
1882
1883
1884 (((
1885 (% style="color:blue" %)**If device has not joined network yet:**
1886 )))
1887 )))
1888
1889 (((
1890 (% style="background-color:#dcdcdc" %)**123456**
1891 )))
1892
1893 (((
1894 (% style="background-color:#dcdcdc" %)**AT+FDR**
1895 )))
1896
1897 (((
1898 (% style="background-color:#dcdcdc" %)**123456**
1899 )))
1900
1901 (((
1902 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1903 )))
1904
1905 (((
1906 (% style="background-color:#dcdcdc" %)**ATZ**
1907 )))
1908
1909
1910 (((
1911 (% style="color:blue" %)**If device already joined network:**
1912 )))
1913
1914 (((
1915 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1916 )))
1917
1918 (((
1919 (% style="background-color:#dcdcdc" %)**ATZ**
1920 )))
1921
1922
1923 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1924
1925 (((
1926
1927
1928 (((
1929 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
1930 )))
1931 )))
1932
1933 (((
1934 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
1935 )))
1936
1937 (((
1938 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
1939 )))
1940
1941 (((
1942 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
1943 )))
1944
1945 (((
1946 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
1947 )))
1948
1949 (((
1950 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
1951 )))
1952
1953 (((
1954 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
1955 )))
1956
1957 (((
1958 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
1959 )))
1960
1961 (((
1962 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
1963 )))
1964
1965 (((
1966 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
1967 )))
1968
1969 (((
1970 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
1971 )))
1972
1973 (((
1974 (% 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.
1975 )))
1976
1977 (((
1978 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
1979
1980
1981 )))
1982
1983 (((
1984 (% style="color:red" %)**Note:**
1985 )))
1986
1987 (((
1988 **~1. Make sure the device is set to ABP mode in the IoT Server.**
1989
1990 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
1991
1992 **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?
1993 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
1994
1995 **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.**
1996 )))
1997
1998 (((
1999 [[image:1653359097980-169.png||height="188" width="729"]]
2000 )))
2001
2002
2003 === 4.2.3 Change to Class A ===
2004
2005
2006 (((
2007 (% style="color:blue" %)**If sensor JOINED:**
2008
2009 (% style="background-color:#dcdcdc" %)**AT+CLASS=A**
2010
2011 (% style="background-color:#dcdcdc" %)**ATZ**
2012 )))
2013
2014
2015 = 5. Case Study =
2016
2017 == 5.1 Counting how many objects pass in Flow Line ==
2018
2019
2020 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
2021
2022
2023 = 6. FAQ =
2024
2025 == 6.1 How to upgrade the image? ==
2026
2027
2028 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2029
2030 * Support new features
2031 * For bug fix
2032 * Change LoRaWAN bands.
2033
2034 Below shows the hardware connection for how to upload an image to the LT:
2035
2036 [[image:1653359603330-121.png]]
2037
2038
2039 (((
2040 (% 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]].
2041 (% 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]].
2042 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2043
2044
2045 (((
2046 (% style="color:blue" %)**For LT-22222-L**(%%):
2047 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.
2048 )))
2049
2050
2051 )))
2052
2053 [[image:image-20220524103407-12.png]]
2054
2055
2056 [[image:image-20220524103429-13.png]]
2057
2058
2059 [[image:image-20220524104033-15.png]]
2060
2061
2062 (% 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:
2063
2064 [[image:1653360054704-518.png||height="186" width="745"]]
2065
2066
2067 (((
2068 (((
2069 == 6.2 How to change the LoRa Frequency Bands/Region? ==
2070
2071
2072 )))
2073 )))
2074
2075 (((
2076 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2077 )))
2078
2079 (((
2080
2081
2082 == 6.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2083
2084
2085 )))
2086
2087 (((
2088 (((
2089 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2090 )))
2091 )))
2092
2093 (((
2094 (((
2095 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2096
2097
2098 )))
2099 )))
2100
2101 (((
2102 (% 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.
2103
2104
2105 )))
2106
2107 (((
2108 [[image:1653360231087-571.png||height="401" width="727"]]
2109
2110
2111 )))
2112
2113 (((
2114 (% 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.**
2115 )))
2116
2117
2118
2119 (((
2120 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2121
2122
2123 )))
2124
2125 (((
2126 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2127
2128 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2129
2130 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2131
2132 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2133
2134 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2135
2136 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2137
2138 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2139
2140 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2141
2142 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2143 )))
2144
2145
2146 (((
2147 As shown in below:
2148 )))
2149
2150 [[image:1653360498588-932.png||height="485" width="726"]]
2151
2152
2153 == 6.4 How to change the uplink interval? ==
2154
2155
2156 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/]]
2157
2158
2159 == 6.5 Can I see counting event in Serial? ==
2160
2161
2162 (((
2163 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.
2164
2165
2166 == 6.6 Can i use point to point communication for LT-22222-L? ==
2167
2168
2169 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]].
2170
2171
2172 )))
2173
2174 (((
2175 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2176
2177
2178 If the device is not shut down, but directly powered off.
2179
2180 It will default that this is a power-off state.
2181
2182 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2183
2184 After restart, the status before power failure will be read from flash.
2185
2186
2187 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2188
2189
2190 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2191
2192
2193 [[image:image-20221006170630-1.png||height="610" width="945"]]
2194
2195
2196 == 6.9 Can LT22222-L save RO state? ==
2197
2198
2199 Firmware version needs to be no less than 1.6.0.
2200
2201
2202 == 6.10 Why does the LT22222 always report 15.585V when measuring AVI? ==
2203
2204
2205 It is likely that the GND is not connected during the measurement, or the wire connected to the GND is loose.
2206
2207
2208 = 7. Trouble Shooting =
2209 )))
2210
2211 (((
2212 (((
2213 == 7.1 Downlink doesn't work, how to solve it? ==
2214
2215
2216 )))
2217 )))
2218
2219 (((
2220 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2221 )))
2222
2223 (((
2224
2225
2226 == 7.2 Have trouble to upload image. ==
2227
2228
2229 )))
2230
2231 (((
2232 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2233 )))
2234
2235 (((
2236
2237
2238 == 7.3 Why I can't join TTN in US915 /AU915 bands? ==
2239
2240
2241 )))
2242
2243 (((
2244 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2245 )))
2246
2247
2248 == 7.4 Why can LT22222 perform Uplink normally, but cannot receive Downlink? ==
2249
2250
2251 The FCD count of the gateway is inconsistent with the FCD count of the node, causing the downlink to remain in the queue state.
2252 Use this command to bring their counts back together: [[Resets the downlink packet count>>||anchor="H3.4.2.23Resetsthedownlinkpacketcount"]]
2253
2254
2255 = 8. Order Info =
2256
2257
2258 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2259
2260 (% style="color:#4f81bd" %)**XXX:**
2261
2262 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2263 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2264 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2265 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2266 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2267 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2268 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2269 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2270 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2271
2272 = 9. Packing Info =
2273
2274
2275 **Package Includes**:
2276
2277 * LT-22222-L I/O Controller x 1
2278 * Stick Antenna for LoRa RF part x 1
2279 * Bracket for controller x1
2280 * Program cable x 1
2281
2282 **Dimension and weight**:
2283
2284 * Device Size: 13.5 x 7 x 3 cm
2285 * Device Weight: 105g
2286 * Package Size / pcs : 14.5 x 8 x 5 cm
2287 * Weight / pcs : 170g
2288
2289 = 10. Support =
2290
2291
2292 * (((
2293 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.
2294 )))
2295 * (((
2296 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]]
2297
2298
2299
2300 )))
2301
2302 = 11. Reference​​​​​ =
2303
2304
2305 * 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]]
2306 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2307 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]