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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/}}
13
14
15
16
17
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 (((
63
64
65 (% style="color:#037691" %)**Hardware System:**
66 )))
67
68 * (((
69 STM32L072xxxx MCU
70 )))
71 * (((
72 SX1276/78 Wireless Chip 
73 )))
74 * (((
75 (((
76 Power Consumption:
77 )))
78
79 * (((
80 Idle: 4mA@12v
81 )))
82 * (((
83 20dB Transmit: 34mA@12v
84 )))
85 )))
86
87 (((
88
89
90 (% style="color:#037691" %)**Interface for Model: LT22222-L:**
91 )))
92
93 * (((
94 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
95 )))
96 * (((
97 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
98 )))
99 * (((
100 2 x Relay Output (5A@250VAC / 30VDC)
101 )))
102 * (((
103 2 x 0~~20mA Analog Input (res:0.01mA)
104 )))
105 * (((
106 2 x 0~~30V Analog Input (res:0.01v)
107 )))
108 * (((
109 Power Input 7~~ 24V DC. 
110 )))
111
112 (((
113
114
115 (% style="color:#037691" %)**LoRa Spec:**
116 )))
117
118 * (((
119 (((
120 Frequency Range:
121 )))
122
123 * (((
124 Band 1 (HF): 862 ~~ 1020 Mhz
125 )))
126 * (((
127 Band 2 (LF): 410 ~~ 528 Mhz
128 )))
129 )))
130 * (((
131 168 dB maximum link budget.
132 )))
133 * (((
134 +20 dBm - 100 mW constant RF output vs.
135 )))
136 * (((
137 +14 dBm high efficiency PA.
138 )))
139 * (((
140 Programmable bit rate up to 300 kbps.
141 )))
142 * (((
143 High sensitivity: down to -148 dBm.
144 )))
145 * (((
146 Bullet-proof front end: IIP3 = -12.5 dBm.
147 )))
148 * (((
149 Excellent blocking immunity.
150 )))
151 * (((
152 Low RX current of 10.3 mA, 200 nA register retention.
153 )))
154 * (((
155 Fully integrated synthesizer with a resolution of 61 Hz.
156 )))
157 * (((
158 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
159 )))
160 * (((
161 Built-in bit synchronizer for clock recovery.
162 )))
163 * (((
164 Preamble detection.
165 )))
166 * (((
167 127 dB Dynamic Range RSSI.
168 )))
169 * (((
170 Automatic RF Sense and CAD with ultra-fast AFC.
171 )))
172 * (((
173 Packet engine up to 256 bytes with CRC.
174
175
176
177 )))
178
179 == 1.3 Features ==
180
181
182 * LoRaWAN Class A & Class C protocol
183
184 * Optional Customized LoRa Protocol
185
186 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
187
188 * AT Commands to change parameters
189
190 * Remote configure parameters via LoRa Downlink
191
192 * Firmware upgradable via program port
193
194 * Counting
195
196 == 1.4 Applications ==
197
198
199 * Smart Buildings & Home Automation
200
201 * Logistics and Supply Chain Management
202
203 * Smart Metering
204
205 * Smart Agriculture
206
207 * Smart Cities
208
209 * Smart Factory
210
211 == 1.5 Hardware Variants ==
212
213
214 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:500px" %)
215 |(% 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**
216 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)(((
217 (% style="text-align:center" %)
218 [[image:image-20230424115112-1.png||height="106" width="58"]]
219 )))|(% style="width:334px" %)(((
220 * 2 x Digital Input (Bi-direction)
221 * 2 x Digital Output
222 * 2 x Relay Output (5A@250VAC / 30VDC)
223 * 2 x 0~~20mA Analog Input (res:0.01mA)
224 * 2 x 0~~30V Analog Input (res:0.01v)
225 * 1 x Counting Port
226 )))
227
228 = 2. Power ON Device =
229
230
231 (((
232 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.
233 )))
234
235 (((
236 PWR will on when device is properly powered.
237
238
239 )))
240
241 [[image:1653297104069-180.png]]
242
243
244 = 3. Operation Mode =
245
246 == 3.1 How it works? ==
247
248
249 (((
250 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. 
251 )))
252
253 (((
254 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.
255 )))
256
257
258 == 3.2 Example to join LoRaWAN network ==
259
260
261 (((
262 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. 
263
264
265 )))
266
267 [[image:image-20220523172350-1.png||height="266" width="864"]]
268
269
270 (((
271 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:
272
273
274 )))
275
276 (((
277 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
278 )))
279
280 (((
281 Each LT is shipped with a sticker with the default device EUI as below:
282 )))
283
284 [[image:image-20230425173427-2.png||height="246" width="530"]]
285
286
287 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
288
289 **Add APP EUI in the application.**
290
291 [[image:1653297955910-247.png||height="321" width="716"]]
292
293
294 **Add APP KEY and DEV EUI**
295
296 [[image:1653298023685-319.png]]
297
298
299 (((
300 (% 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.
301
302
303 )))
304
305 [[image:1653298044601-602.png||height="405" width="709"]]
306
307
308 == 3.3 Uplink Payload ==
309
310
311 There are five working modes + one interrupt mode on LT for different type application:
312
313 * (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
314
315 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
316
317 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
318
319 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
320
321 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
322
323 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
324
325 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
326
327
328 (((
329 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
330
331 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
332 |(% 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**
333 |Value|(((
334 AVI1 voltage
335 )))|(((
336 AVI2 voltage
337 )))|(((
338 ACI1 Current
339 )))|(((
340 ACI2 Current
341 )))|DIDORO*|(((
342 Reserve
343 )))|MOD
344 )))
345
346 (((
347 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
348
349 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
350 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
351 |RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
352 )))
353
354 * RO is for relay. ROx=1 : close, ROx=0 always open.
355 * DI is for digital input. DIx=1: high or float, DIx=0: low.
356 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
357
358 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
359
360 For example if payload is: [[image:image-20220523175847-2.png]]
361
362
363 **The value for the interface is:  **
364
365 AVI1 channel voltage is 0x04AB/1000=1195(DEC)/1000=1.195V
366
367 AVI2 channel voltage is 0x04AC/1000=1.196V
368
369 ACI1 channel current is 0x1310/1000=4.880mA
370
371 ACI2 channel current is 0x1300/1000=4.864mA
372
373 The last byte 0xAA= 10101010(B) means
374
375 * [1] RO1 relay channel is close and the RO1 LED is ON.
376 * [0] RO2 relay channel is open and RO2 LED is OFF;
377
378 **LT22222-L:**
379
380 * [1] DI2 channel is high input and DI2 LED is ON;
381 * [0] DI1 channel is low input;
382
383 * [0] DO3 channel output state
384 ** DO3 is float in case no load between DO3 and V+.;
385 ** DO3 is high in case there is load between DO3 and V+.
386 ** DO3 LED is off in both case
387 * [1] DO2 channel output is low and DO2 LED is ON.
388 * [0] DO1 channel output state
389 ** DO1 is float in case no load between DO1 and V+.;
390 ** DO1 is high in case there is load between DO1 and V+.
391 ** DO1 LED is off in both case
392
393 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
394
395
396 (((
397 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
398 )))
399
400 (((
401 Total : 11 bytes payload
402
403 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
404 |(% 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**
405 |Value|COUNT1|COUNT2 |DIDORO*|(((
406 Reserve
407 )))|MOD
408 )))
409
410 (((
411 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
412
413 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
414 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
415 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
416
417 RO is for relay. ROx=1 : close , ROx=0 always open.
418 )))
419
420 * FIRST: Indicate this is the first packet after join network.
421 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
422
423 (((
424 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
425
426
427 )))
428
429 (((
430 **To use counting mode, please run:**
431 )))
432
433 (((
434 (% class="box infomessage" %)
435 (((
436 **AT+MOD=2**
437
438 **ATZ**
439 )))
440 )))
441
442 (((
443
444
445 (% style="color:#4f81bd" %)**AT Commands for counting:**
446 )))
447
448 (((
449 **For LT22222-L:**
450
451 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
452
453 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
454
455 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
456
457 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
458
459 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
460
461 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
462 )))
463
464
465 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
466
467
468 **LT22222-L**: This mode the DI1 is used as a counting pin.
469
470 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
471 |(% style="background-color:#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**
472 |Value|COUNT1|(((
473 ACI1 Current
474 )))|(((
475 ACI2 Current
476 )))|DIDORO*|Reserve|MOD
477
478 (((
479 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
480
481 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
482 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
483 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
484 )))
485
486 * RO is for relay. ROx=1 : close, ROx=0 always open.
487 * FIRST: Indicate this is the first packet after join network.
488 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
489
490 (((
491 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
492 )))
493
494
495 (((
496 **To use counting mode, please run:**
497 )))
498
499 (((
500 (% class="box infomessage" %)
501 (((
502 **AT+MOD=3**
503
504 **ATZ**
505 )))
506 )))
507
508 (((
509 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
510 )))
511
512
513 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
514
515
516 (((
517 **LT22222-L**: This mode the DI1 is used as a counting pin.
518 )))
519
520 (((
521 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.
522
523 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
524 |(% 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**
525 |Value|COUNT1|AVI1 Counting|DIDORO*|(((
526 Reserve
527 )))|MOD
528 )))
529
530 (((
531 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
532
533 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
534 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
535 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
536 )))
537
538 * RO is for relay. ROx=1 : close, ROx=0 always open.
539 * FIRST: Indicate this is the first packet after join network.
540 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
541
542 (((
543 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
544
545
546 )))
547
548 (((
549 **To use this mode, please run:**
550 )))
551
552 (((
553 (% class="box infomessage" %)
554 (((
555 **AT+MOD=4**
556
557 **ATZ**
558 )))
559 )))
560
561 (((
562 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
563 )))
564
565 (((
566 **Plus below command for AVI1 Counting:**
567
568 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
569
570 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
571
572 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
573
574 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
575 )))
576
577
578 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
579
580
581 **LT22222-L**: This mode the DI1 is used as a counting pin.
582
583 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
584 |(% 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**
585 |Value|(((
586 AVI1 voltage
587 )))|(((
588 AVI2 voltage
589 )))|(((
590 ACI1 Current
591 )))|COUNT1|DIDORO*|(((
592 Reserve
593 )))|MOD
594
595 (((
596 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
597
598 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
599 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
600 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
601 )))
602
603 * RO is for relay. ROx=1 : close, ROx=0 always open.
604 * FIRST: Indicate this is the first packet after join network.
605 * (((
606 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
607 )))
608
609 (((
610 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
611 )))
612
613 (((
614 **To use this mode, please run:**
615 )))
616
617 (((
618 (% class="box infomessage" %)
619 (((
620 **AT+MOD=5**
621
622 **ATZ**
623 )))
624 )))
625
626 (((
627 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
628 )))
629
630
631 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
632
633
634 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
635
636 For example, if user has configured below commands:
637
638 * **AT+MOD=1 ** **~-~->**  The normal working mode
639 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
640
641 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
642
643 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
644 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.**
645
646 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
647
648
649 (% style="color:#4f81bd" %)**Trigger base on voltage**:
650
651 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
652
653
654 **Example:**
655
656 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)
657
658 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
659
660
661
662 (% style="color:#4f81bd" %)**Trigger base on current**:
663
664 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
665
666
667 **Example:**
668
669 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
670
671
672
673 (% style="color:#4f81bd" %)**Trigger base on DI status**:
674
675 DI status trigger Flag.
676
677 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
678
679
680 **Example:**
681
682 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
683
684
685 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
686
687 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
688
689 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
690
691 AA: Code for this downlink Command:
692
693 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
694
695 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
696
697 yy2 yy2: AC1 or AV1 high limit.
698
699 yy3 yy3: AC2 or AV2 low limit.
700
701 Yy4 yy4: AC2 or AV2 high limit.
702
703
704 **Example1**: AA 00 13 88 00 00 00 00 00 00
705
706 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
707
708
709 **Example2**: AA 02 01 00
710
711 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
712
713
714
715 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
716
717 MOD6 Payload : total 11 bytes payload
718
719 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
720 |(% 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**
721 |Value|(((
722 TRI_A FLAG
723 )))|(((
724 TRI_A Status
725 )))|(((
726 TRI_DI FLAG+STA
727 )))|Reserve|Enable/Disable MOD6|(((
728 MOD(6)
729 )))
730
731 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
732
733 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
734 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
735 |(((
736 AV1_LOW
737 )))|(((
738 AV1_HIGH
739 )))|(((
740 AV2_LOW
741 )))|(((
742 AV2_HIGH
743 )))|(((
744 AC1_LOW
745 )))|(((
746 AC1_HIGH
747 )))|(((
748 AC2_LOW
749 )))|(((
750 AC2_HIGH
751 )))
752
753 * Each bits shows if the corresponding trigger has been configured.
754
755 **Example:**
756
757 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
758
759
760 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
761
762 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
763 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
764 |(((
765 AV1_LOW
766 )))|(((
767 AV1_HIGH
768 )))|(((
769 AV2_LOW
770 )))|(((
771 AV2_HIGH
772 )))|(((
773 AC1_LOW
774 )))|(((
775 AC1_HIGH
776 )))|(((
777 AC2_LOW
778 )))|(((
779 AC2_HIGH
780 )))
781
782 * Each bits shows which status has been trigger on this uplink.
783
784 **Example:**
785
786 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
787
788
789 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
790
791 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:515px" %)
792 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
793 |N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
794
795 * Each bits shows which status has been trigger on this uplink.
796
797 **Example:**
798
799 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
800
801 00000101: Means both DI1 and DI2 trigger are enabled.
802
803
804 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
805
806 Downlink command to poll MOD6 status:
807
808 **AB 06**
809
810 When device got this command, it will send the MOD6 payload.
811
812
813 === 3.3.7 Payload Decoder ===
814
815 (((
816
817
818 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
819 )))
820
821
822 == 3.4 ​Configure LT via AT or Downlink ==
823
824
825 (((
826 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
827 )))
828
829 (((
830 (((
831 There are two kinds of Commands:
832 )))
833 )))
834
835 * (% 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]]
836
837 * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
838
839 === 3.4.1 Common Commands ===
840
841
842 (((
843 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]]
844 )))
845
846
847 === 3.4.2 Sensor related commands ===
848
849 ==== 3.4.2.1 Set Transmit Interval ====
850
851
852 Set device uplink interval.
853
854 * (% style="color:#037691" %)**AT Command:**
855
856 (% style="color:blue" %)**AT+TDC=N **
857
858
859 **Example: **AT+TDC=30000. Means set interval to 30 seconds
860
861
862 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
863
864 (% style="color:blue" %)**0x01 aa bb cc  **(%%)** ~/~/ Same as AT+TDC=0x(aa bb cc)**
865
866
867
868 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
869
870
871 Set work mode.
872
873 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+MOD=N  **
874
875 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
876
877 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
878
879 (% style="color:blue" %)**0x0A aa  **(%%)** ** ~/~/ Same as AT+MOD=aa
880
881
882
883 ==== 3.4.2.3 Poll an uplink ====
884
885
886 * (% style="color:#037691" %)**AT Command:**(%%) There is no AT Command to poll uplink
887
888 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
889
890 (% style="color:blue" %)**0x08 FF  **(%%)** **~/~/ Poll an uplink
891
892 **Example**: 0x08FF, ask device to send an Uplink
893
894
895
896 ==== 3.4.2.4 Enable Trigger Mode ====
897
898
899 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
900
901 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ADDMOD6=1 or 0**
902
903 (% style="color:red" %)**1:** (%%)Enable Trigger Mode
904
905 (% style="color:red" %)**0: **(%%)Disable Trigger Mode
906
907
908 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
909
910 (% style="color:blue" %)**0x0A 06 aa    **(%%) ~/~/ Same as AT+ADDMOD6=aa
911
912
913
914 ==== 3.4.2.5 Poll trigger settings ====
915
916
917 Poll trigger settings
918
919 * (% style="color:#037691" %)**AT Command:**
920
921 There is no AT Command for this feature.
922
923 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
924
925 (% style="color:blue" %)**0xAB 06  ** (%%) ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
926
927
928
929 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
930
931
932 Enable Disable DI1/DI2/DI2 as trigger,
933
934 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
935
936 **Example:** AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
937
938
939 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
940
941 (% style="color:blue" %)**0xAA 02 aa bb   ** (%%) ~/~/ Same as AT+DTRI=aa,bb
942
943
944
945 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
946
947
948 Set DI1 or DI3(for LT-33222-L) trigger.
949
950 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG1=a,b**
951
952 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
953
954 (% style="color:red" %)**b :** (%%)delay timing.
955
956 **Example:** AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
957
958
959 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
960
961 (% style="color:blue" %)**0x09 01 aa bb cc    ** (%%) ~/~/ same as AT+TRIG1=aa,0x(bb cc)
962
963
964
965 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
966
967
968 Set DI2 trigger.
969
970 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+TRIG2=a,b**
971
972 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
973
974 (% style="color:red" %)**b :** (%%)delay timing.
975
976 **Example:** AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
977
978
979 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
980
981 (% style="color:blue" %)**0x09 02 aa bb cc   ** (%%)~/~/ same as AT+TRIG2=aa,0x(bb cc)
982
983
984
985 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
986
987
988 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
989
990 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+ACLIM**
991
992 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
993
994 (% 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"]]
995
996
997
998 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
999
1000
1001 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1002
1003 * (% style="color:#037691" %)**AT Command**(%%): (% style="color:blue" %)**AT+AVLIM    **(%%)** See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1004
1005 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
1006
1007 (% 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"]]
1008
1009
1010
1011 ==== 3.4.2.11 Trigger – Set minimum interval ====
1012
1013
1014 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
1015
1016 * (% 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.
1017
1018 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
1019
1020 (% style="color:blue" %)**0x AC aa bb   **(%%) ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
1021
1022 (((
1023 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
1024 )))
1025
1026
1027
1028 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1029
1030
1031 * (% style="color:#037691" %)**AT Command**
1032
1033 There is no AT Command to control Digital Output
1034
1035
1036 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1037
1038 (% style="color:blue" %)**0x02 aa bb cc     ** (%%)~/~/ Set DO1/DO2/DO3 output
1039
1040 (((
1041 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1042 )))
1043
1044 (((
1045 01: Low,  00: High ,  11: No action
1046
1047 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1048 |(% 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**
1049 |02  01  00  11|Low|High|No Action
1050 |02  00  11  01|High|No Action|Low
1051 |02  11  01  00|No Action|Low|High
1052 )))
1053
1054 (((
1055 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1056 )))
1057
1058 (((
1059 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1060 )))
1061
1062
1063
1064 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1065
1066
1067 * (% style="color:#037691" %)**AT Command**
1068
1069 There is no AT Command to control Digital Output
1070
1071
1072 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1073
1074 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1075
1076
1077 This is to control the digital output time of DO pin. Include four bytes:
1078
1079 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1080
1081 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1082
1083 01: DO pins will change back to original state after timeout.
1084
1085 00: DO pins will change to an inverter state after timeout 
1086
1087
1088 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1089
1090 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1091 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1092 |0x01|DO1 set to low
1093 |0x00|DO1 set to high
1094 |0x11|DO1 NO Action
1095
1096 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1097
1098 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1099 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1100 |0x01|DO2 set to low
1101 |0x00|DO2 set to high
1102 |0x11|DO2 NO Action
1103
1104 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1105
1106 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1107 |(% style="background-color:#4f81bd; color:white" %)**Second Byte**|(% style="background-color:#4f81bd; color:white" %)**Status**
1108 |0x01|DO3 set to low
1109 |0x00|DO3 set to high
1110 |0x11|DO3 NO Action
1111
1112 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:(%%) Latching time. Unit: ms
1113
1114
1115 (% style="color:red" %)**Note: **
1116
1117 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1118
1119 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1120
1121 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1122
1123
1124 **Example payload:**
1125
1126 **~1. A9 01 01 01 01 07 D0**
1127
1128 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1129
1130 **2. A9 01 00 01 11 07 D0**
1131
1132 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1133
1134 **3. A9 00 00 00 00 07 D0**
1135
1136 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1137
1138 **4. A9 00 11 01 00 07 D0**
1139
1140 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
1141
1142
1143
1144 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1145
1146
1147 * (% style="color:#037691" %)**AT Command:**
1148
1149 There is no AT Command to control Relay Output
1150
1151
1152 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1153
1154 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1155
1156
1157 (((
1158 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1159 )))
1160
1161 (((
1162 00: Close ,  01: Open , 11: No action
1163
1164 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1165 |(% style="background-color:#4f81bd; color:white" %)**Downlink Code**|(% style="background-color:#4f81bd; color:white" %)**RO1**|(% style="background-color:#4f81bd; color:white" %)**RO2**
1166 |03  00  11|Open|No Action
1167 |03  01  11|Close|No Action
1168 |03  11  00|No Action|Open
1169 |03  11  01|No Action|Close
1170 |03  00  00|Open|Open
1171 |03  01  01|Close|Close
1172 |03  01  00|Close|Open
1173 |03  00  01|Open|Close
1174 )))
1175
1176 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1177
1178
1179
1180 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1181
1182
1183 * (% style="color:#037691" %)**AT Command:**
1184
1185 There is no AT Command to control Relay Output
1186
1187
1188 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1189
1190 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1191
1192
1193 This is to control the relay output time of relay. Include four bytes:
1194
1195 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1196
1197 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1198
1199 01: Relays will change back to original state after timeout.
1200
1201 00: Relays will change to an inverter state after timeout
1202
1203
1204 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1205
1206 [[image:image-20221008095908-1.png||height="364" width="564"]]
1207
1208
1209 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1210
1211
1212 (% style="color:red" %)**Note:**
1213
1214 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1215
1216 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1217
1218
1219 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1220
1221
1222 **Example payload:**
1223
1224 **~1. 05 01 11 07 D0**
1225
1226 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1227
1228 **2. 05 01 10 07 D0**
1229
1230 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1231
1232 **3. 05 00 01 07 D0**
1233
1234 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1235
1236 **4. 05 00 00 07 D0**
1237
1238 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1239
1240
1241
1242 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1243
1244
1245 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1246
1247 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1248
1249 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1250
1251 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1252
1253
1254
1255 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1256
1257
1258 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1259
1260 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1261
1262 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1263
1264
1265 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1266
1267 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1268
1269
1270
1271 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1272
1273
1274 Clear counting for counting mode
1275
1276 * (% style="color:#037691" %)**AT Command:**(%%) (% style="color:blue" %)**AT+CLRCOUNT         **(%%) ~/~/ clear all counting
1277
1278 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1279
1280 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1281
1282
1283
1284 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1285
1286
1287 * (% style="color:#037691" %)**AT Command:**
1288
1289 (% 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)
1290
1291
1292 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1293
1294 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1295
1296 (((
1297 range: aa bb cc:0 to 16777215,  (unit:second)
1298 )))
1299
1300
1301
1302 ==== 3.4.2.20 Reset save RO DO state ====
1303
1304
1305 * (% style="color:#037691" %)**AT Command:**
1306
1307 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1308
1309 (% 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.
1310
1311
1312 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1313
1314 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1315
1316
1317
1318 ==== 3.4.2.21 Encrypted payload ====
1319
1320
1321 * (% style="color:#037691" %)**AT Command:**
1322
1323 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1324
1325 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1326
1327
1328
1329 ==== 3.4.2.22 Get sensor value ====
1330
1331
1332 * (% style="color:#037691" %)**AT Command:**
1333
1334 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1335
1336 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1337
1338
1339
1340 ==== 3.4.2.23 Resets the downlink packet count ====
1341
1342
1343 * (% style="color:#037691" %)**AT Command:**
1344
1345 (% 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)
1346
1347 (% 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.
1348
1349
1350
1351 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1352
1353
1354 * (% style="color:#037691" %)**AT Command:**
1355
1356 (% 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)
1357
1358 (% 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.
1359
1360
1361 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1362
1363 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1364
1365
1366
1367 ==== 3.4.2.25 Copy downlink to uplink ====
1368
1369
1370 * (% style="color:#037691" %)**AT Command**(%%)**:**
1371
1372 (% 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.
1373
1374 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.
1375
1376
1377 [[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"]]
1378
1379 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1380
1381
1382
1383 [[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"]]
1384
1385 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1386
1387
1388
1389 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1390
1391
1392 * (((
1393 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1394
1395 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1396
1397
1398 )))
1399
1400 **Example:**
1401
1402 [[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"]]
1403
1404
1405 == 3.5 Integrate with Mydevice ==
1406
1407
1408 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:
1409
1410 (((
1411 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1412 )))
1413
1414 (((
1415 (% 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:
1416
1417
1418 )))
1419
1420 [[image:image-20220719105525-1.png||height="377" width="677"]]
1421
1422
1423
1424 [[image:image-20220719110247-2.png||height="388" width="683"]]
1425
1426
1427 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1428
1429 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L) and add DevEUI.(% style="display:none" %)
1430
1431 Search under The things network
1432
1433 [[image:1653356838789-523.png||height="337" width="740"]]
1434
1435
1436 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1437
1438 [[image:image-20220524094909-1.png||height="335" width="729"]]
1439
1440
1441 [[image:image-20220524094909-2.png||height="337" width="729"]]
1442
1443
1444 [[image:image-20220524094909-3.png||height="338" width="727"]]
1445
1446
1447 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1448
1449
1450 [[image:image-20220524094909-5.png||height="341" width="734"]]
1451
1452
1453 == 3.6 Interface Detail ==
1454
1455 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1456
1457
1458 Support NPN Type sensor
1459
1460 [[image:1653356991268-289.png]]
1461
1462
1463 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1464
1465
1466 (((
1467 The DI port of LT-22222-L can support **NPN** or **PNP** or **Dry Contact** output sensor.
1468 )))
1469
1470 (((
1471 (((
1472 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.
1473
1474
1475 )))
1476 )))
1477
1478 [[image:1653357170703-587.png]]
1479
1480 (((
1481 (((
1482 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1483 )))
1484 )))
1485
1486 (((
1487
1488 )))
1489
1490 (((
1491 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1492 )))
1493
1494 (((
1495 This type of sensor will output a low signal GND when active.
1496 )))
1497
1498 * (((
1499 Connect sensor's output to DI1-
1500 )))
1501 * (((
1502 Connect sensor's VCC to DI1+.
1503 )))
1504
1505 (((
1506 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1507 )))
1508
1509 (((
1510 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1511 )))
1512
1513 (((
1514 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.
1515 )))
1516
1517 (((
1518
1519 )))
1520
1521 (((
1522 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1523 )))
1524
1525 (((
1526 This type of sensor will output a high signal (example 24v) when active.
1527 )))
1528
1529 * (((
1530 Connect sensor's output to DI1+
1531 )))
1532 * (((
1533 Connect sensor's GND DI1-.
1534 )))
1535
1536 (((
1537 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1538 )))
1539
1540 (((
1541 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1542 )))
1543
1544 (((
1545 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.
1546 )))
1547
1548 (((
1549
1550 )))
1551
1552 (((
1553 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1554 )))
1555
1556 (((
1557 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1558 )))
1559
1560 * (((
1561 Connect sensor's output to DI1+ with a serial 50K resistor
1562 )))
1563 * (((
1564 Connect sensor's GND DI1-.
1565 )))
1566
1567 (((
1568 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1569 )))
1570
1571 (((
1572 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1573 )))
1574
1575 (((
1576 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.
1577 )))
1578
1579
1580 (% style="color:blue" %)**Example4**(%%): Connect to Dry Contact sensor
1581
1582 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.
1583
1584 To detect a Dry Contact, we can provide a power source to one pin of the Dry Contact. Below is a reference connection.
1585
1586 [[image:image-20230616235145-1.png]]
1587
1588 (% style="color:blue" %)**Example5**(%%): Connect to Open Colleactor
1589
1590 [[image:image-20240219115718-1.png]]
1591
1592
1593 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1594
1595
1596 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1597
1598 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1599
1600 [[image:1653357531600-905.png]]
1601
1602
1603 === 3.6.4 Analog Input Interface ===
1604
1605
1606 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:
1607
1608
1609 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1610
1611 [[image:1653357592296-182.png]]
1612
1613 Example to connect a 4~~20mA sensor
1614
1615 We take the wind speed sensor as an example for reference only.
1616
1617
1618 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1619
1620 (% style="color:red" %)**Red:  12~~24v**
1621
1622 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1623
1624 **Black:  GND**
1625
1626 **Connection diagram:**
1627
1628 [[image:1653357640609-758.png]]
1629
1630 [[image:1653357648330-671.png||height="155" width="733"]]
1631
1632
1633 Example connected to a regulated power supply to measure voltage
1634
1635 [[image:image-20230608101532-1.png||height="606" width="447"]]
1636
1637 [[image:image-20230608101608-2.jpeg||height="379" width="284"]]
1638
1639 [[image:image-20230608101722-3.png||height="102" width="1139"]]
1640
1641
1642 (% style="color:blue; font-weight:bold" %)**Specifications of the regulated power**(%%) (% style="color:blue" %)**:**
1643
1644 (% style="color:red" %)**Red:  12~~24v**
1645
1646 **Black:  GND**
1647
1648
1649 === 3.6.5 Relay Output ===
1650
1651
1652 (((
1653 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:
1654
1655 **Note**: RO pins go to Open(NO) when device is power off.
1656 )))
1657
1658 [[image:image-20220524100215-9.png]]
1659
1660
1661 [[image:image-20220524100215-10.png||height="382" width="723"]]
1662
1663
1664 == 3.7 LEDs Indicators ==
1665
1666
1667 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
1668 |(% style="background-color:#4f81bd; color:white; width:50px" %)**LEDs**|(% style="background-color:#4f81bd; color:white; width:460px" %)**Feature**
1669 |**PWR**|Always on if there is power
1670 |**SYS**|(((
1671 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.
1672 )))
1673 |**TX**|(((
1674 (((
1675 Device boot: TX blinks 5 times.
1676 )))
1677
1678 (((
1679 Successful join network: TX ON for 5 seconds.
1680 )))
1681
1682 (((
1683 Transmit a LoRa packet: TX blinks once
1684 )))
1685 )))
1686 |**RX**|RX blinks once when receive a packet.
1687 |**DO1**|
1688 |**DO2**|
1689 |**DO3**|
1690 |**DI2**|(((
1691 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1692 )))
1693 |**DI2**|(((
1694 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1695 )))
1696 |**DI2**|(((
1697 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1698 )))
1699 |**RO1**|
1700 |**RO2**|
1701
1702 = 4. Use AT Command =
1703
1704 == 4.1 Access AT Command ==
1705
1706
1707 (((
1708 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.
1709 )))
1710
1711 [[image:1653358238933-385.png]]
1712
1713
1714 (((
1715 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:
1716 )))
1717
1718 [[image:1653358355238-883.png]]
1719
1720
1721 (((
1722 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/]]
1723 )))
1724
1725 (((
1726 AT+<CMD>?        : Help on <CMD>
1727 )))
1728
1729 (((
1730 AT+<CMD>         : Run <CMD>
1731 )))
1732
1733 (((
1734 AT+<CMD>=<value> : Set the value
1735 )))
1736
1737 (((
1738 AT+<CMD>=?       :  Get the value
1739 )))
1740
1741 (((
1742 ATZ: Trig a reset of the MCU
1743 )))
1744
1745 (((
1746 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1747 )))
1748
1749 (((
1750 AT+DEUI: Get or Set the Device EUI
1751 )))
1752
1753 (((
1754 AT+DADDR: Get or Set the Device Address
1755 )))
1756
1757 (((
1758 AT+APPKEY: Get or Set the Application Key
1759 )))
1760
1761 (((
1762 AT+NWKSKEY: Get or Set the Network Session Key
1763 )))
1764
1765 (((
1766 AT+APPSKEY:  Get or Set the Application Session Key
1767 )))
1768
1769 (((
1770 AT+APPEUI:  Get or Set the Application EUI
1771 )))
1772
1773 (((
1774 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1775 )))
1776
1777 (((
1778 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1779 )))
1780
1781 (((
1782 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1783 )))
1784
1785 (((
1786 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1787 )))
1788
1789 (((
1790 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1791 )))
1792
1793 (((
1794 AT+RX2FQ: Get or Set the Rx2 window frequency
1795 )))
1796
1797 (((
1798 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1799 )))
1800
1801 (((
1802 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1803 )))
1804
1805 (((
1806 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1807 )))
1808
1809 (((
1810 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1811 )))
1812
1813 (((
1814 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1815 )))
1816
1817 (((
1818 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1819 )))
1820
1821 (((
1822 AT+NWKID: Get or Set the Network ID
1823 )))
1824
1825 (((
1826 AT+FCU: Get or Set the Frame Counter Uplink
1827 )))
1828
1829 (((
1830 AT+FCD: Get or Set the Frame Counter Downlink
1831 )))
1832
1833 (((
1834 AT+CLASS: Get or Set the Device Class
1835 )))
1836
1837 (((
1838 AT+JOIN: Join network
1839 )))
1840
1841 (((
1842 AT+NJS: Get OTAA Join Status
1843 )))
1844
1845 (((
1846 AT+SENDB: Send hexadecimal data along with the application port
1847 )))
1848
1849 (((
1850 AT+SEND: Send text data along with the application port
1851 )))
1852
1853 (((
1854 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1855 )))
1856
1857 (((
1858 AT+RECV: Print last received data in raw format
1859 )))
1860
1861 (((
1862 AT+VER:  Get current image version and Frequency Band
1863 )))
1864
1865 (((
1866 AT+CFM: Get or Set the confirmation mode (0-1)
1867 )))
1868
1869 (((
1870 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1871 )))
1872
1873 (((
1874 AT+SNR: Get the SNR of the last received packet
1875 )))
1876
1877 (((
1878 AT+RSSI: Get the RSSI of the last received packet
1879 )))
1880
1881 (((
1882 AT+TDC: Get or set the application data transmission interval in ms
1883 )))
1884
1885 (((
1886 AT+PORT: Get or set the application port
1887 )))
1888
1889 (((
1890 AT+DISAT: Disable AT commands
1891 )))
1892
1893 (((
1894 AT+PWORD: Set password, max 9 digits
1895 )))
1896
1897 (((
1898 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1899 )))
1900
1901 (((
1902 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1903 )))
1904
1905 (((
1906 AT+CFG: Print all settings
1907 )))
1908
1909
1910 == 4.2 Common AT Command Sequence ==
1911
1912 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1913
1914 (((
1915
1916
1917 (((
1918 (% style="color:blue" %)**If device has not joined network yet:**
1919 )))
1920 )))
1921
1922 (((
1923 (% style="background-color:#dcdcdc" %)**123456**
1924 )))
1925
1926 (((
1927 (% style="background-color:#dcdcdc" %)**AT+FDR**
1928 )))
1929
1930 (((
1931 (% style="background-color:#dcdcdc" %)**123456**
1932 )))
1933
1934 (((
1935 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1936 )))
1937
1938 (((
1939 (% style="background-color:#dcdcdc" %)**ATZ**
1940 )))
1941
1942
1943 (((
1944 (% style="color:blue" %)**If device already joined network:**
1945 )))
1946
1947 (((
1948 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1949 )))
1950
1951 (((
1952 (% style="background-color:#dcdcdc" %)**ATZ**
1953 )))
1954
1955
1956 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1957
1958 (((
1959
1960
1961 (((
1962 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
1963 )))
1964 )))
1965
1966 (((
1967 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
1968 )))
1969
1970 (((
1971 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
1972 )))
1973
1974 (((
1975 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
1976 )))
1977
1978 (((
1979 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
1980 )))
1981
1982 (((
1983 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
1984 )))
1985
1986 (((
1987 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
1988 )))
1989
1990 (((
1991 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
1992 )))
1993
1994 (((
1995 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
1996 )))
1997
1998 (((
1999 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
2000 )))
2001
2002 (((
2003 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
2004 )))
2005
2006 (((
2007 (% 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.
2008 )))
2009
2010 (((
2011 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2012
2013
2014 )))
2015
2016 (((
2017 (% style="color:red" %)**Note:**
2018 )))
2019
2020 (((
2021 **~1. Make sure the device is set to ABP mode in the IoT Server.**
2022
2023 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
2024
2025 **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?
2026 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2027
2028 **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.**
2029 )))
2030
2031 (((
2032 [[image:1653359097980-169.png||height="188" width="729"]]
2033 )))
2034
2035
2036 === 4.2.3 Change to Class A ===
2037
2038
2039 (((
2040 (% style="color:blue" %)**If sensor JOINED:**
2041
2042 (% style="background-color:#dcdcdc" %)**AT+CLASS=A**
2043
2044 (% style="background-color:#dcdcdc" %)**ATZ**
2045 )))
2046
2047
2048 = 5. Case Study =
2049
2050 == 5.1 Counting how many objects pass in Flow Line ==
2051
2052
2053 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
2054
2055
2056 = 6. FAQ =
2057
2058 == 6.1 How to upgrade the image? ==
2059
2060
2061 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2062
2063 * Support new features
2064 * For bug fix
2065 * Change LoRaWAN bands.
2066
2067 Below shows the hardware connection for how to upload an image to the LT:
2068
2069 [[image:1653359603330-121.png]]
2070
2071
2072 (((
2073 (% 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]].
2074 (% 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]].
2075 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2076
2077
2078 (((
2079 (% style="color:blue" %)**For LT-22222-L**(%%):
2080 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.
2081 )))
2082
2083
2084 )))
2085
2086 [[image:image-20220524103407-12.png]]
2087
2088
2089 [[image:image-20220524103429-13.png]]
2090
2091
2092 [[image:image-20220524104033-15.png]]
2093
2094
2095 (% 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:
2096
2097 [[image:1653360054704-518.png||height="186" width="745"]]
2098
2099
2100 (((
2101 (((
2102 == 6.2 How to change the LoRa Frequency Bands/Region? ==
2103
2104
2105 )))
2106 )))
2107
2108 (((
2109 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2110 )))
2111
2112 (((
2113
2114
2115 == 6.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2116
2117
2118 )))
2119
2120 (((
2121 (((
2122 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2123 )))
2124 )))
2125
2126 (((
2127 (((
2128 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2129
2130
2131 )))
2132 )))
2133
2134 (((
2135 (% 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.
2136
2137
2138 )))
2139
2140 (((
2141 [[image:1653360231087-571.png||height="401" width="727"]]
2142
2143
2144 )))
2145
2146 (((
2147 (% 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.**
2148 )))
2149
2150
2151
2152 (((
2153 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2154
2155
2156 )))
2157
2158 (((
2159 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2160
2161 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2162
2163 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2164
2165 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2166
2167 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2168
2169 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2170
2171 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2172
2173 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2174
2175 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2176 )))
2177
2178
2179 (((
2180 As shown in below:
2181 )))
2182
2183 [[image:1653360498588-932.png||height="485" width="726"]]
2184
2185
2186 == 6.4 How to change the uplink interval? ==
2187
2188
2189 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/]]
2190
2191
2192 == 6.5 Can I see counting event in Serial? ==
2193
2194
2195 (((
2196 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.
2197
2198
2199 == 6.6 Can i use point to point communication for LT-22222-L? ==
2200
2201
2202 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]].
2203
2204
2205 )))
2206
2207 (((
2208 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2209
2210
2211 If the device is not shut down, but directly powered off.
2212
2213 It will default that this is a power-off state.
2214
2215 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2216
2217 After restart, the status before power failure will be read from flash.
2218
2219
2220 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2221
2222
2223 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2224
2225
2226 [[image:image-20221006170630-1.png||height="610" width="945"]]
2227
2228
2229 == 6.9 Can LT22222-L save RO state? ==
2230
2231
2232 Firmware version needs to be no less than 1.6.0.
2233
2234
2235 == 6.10 Why does the LT22222 always report 15.585V when measuring AVI? ==
2236
2237
2238 It is likely that the GND is not connected during the measurement, or the wire connected to the GND is loose.
2239
2240
2241 = 7. Trouble Shooting =
2242 )))
2243
2244 (((
2245 (((
2246 == 7.1 Downlink doesn't work, how to solve it? ==
2247
2248
2249 )))
2250 )))
2251
2252 (((
2253 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2254 )))
2255
2256 (((
2257
2258
2259 == 7.2 Have trouble to upload image. ==
2260
2261
2262 )))
2263
2264 (((
2265 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2266 )))
2267
2268 (((
2269
2270
2271 == 7.3 Why I can't join TTN in US915 /AU915 bands? ==
2272
2273
2274 )))
2275
2276 (((
2277 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2278 )))
2279
2280
2281 == 7.4 Why can LT22222 perform Uplink normally, but cannot receive Downlink? ==
2282
2283
2284 The FCD count of the gateway is inconsistent with the FCD count of the node, causing the downlink to remain in the queue state.
2285 Use this command to bring their counts back together: [[Resets the downlink packet count>>||anchor="H3.4.2.23Resetsthedownlinkpacketcount"]]
2286
2287
2288 = 8. Order Info =
2289
2290
2291 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2292
2293 (% style="color:#4f81bd" %)**XXX:**
2294
2295 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2296 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2297 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2298 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2299 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2300 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2301 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2302 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2303 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2304
2305 = 9. Packing Info =
2306
2307
2308 **Package Includes**:
2309
2310 * LT-22222-L I/O Controller x 1
2311 * Stick Antenna for LoRa RF part x 1
2312 * Bracket for controller x1
2313 * Program cable x 1
2314
2315 **Dimension and weight**:
2316
2317 * Device Size: 13.5 x 7 x 3 cm
2318 * Device Weight: 105g
2319 * Package Size / pcs : 14.5 x 8 x 5 cm
2320 * Weight / pcs : 170g
2321
2322 = 10. Support =
2323
2324
2325 * (((
2326 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.
2327 )))
2328 * (((
2329 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]]
2330
2331
2332
2333 )))
2334
2335 = 11. Reference​​​​​ =
2336
2337
2338 * 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]]
2339 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2340 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
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