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Version 122.1 by Bei Jinggeng on 2023/06/08 10:19
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4
5
6 **Table of Contents:**
7
8 {{toc/}}
9
10
11
12
13
14
15
16 = 1.Introduction =
17
18 == 1.1 What is LT Series I/O Controller ==
19
20 (((
21
22
23 (((
24 The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
25 )))
26 )))
27
28 (((
29 The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
30 )))
31
32 (((
33 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
34 )))
35
36 (((
37 The use environment includes:
38 )))
39
40 (((
41 1) If user's area has LoRaWAN service coverage, they can just install the I/O controller and configure it to connect the LoRaWAN provider via wireless.
42 )))
43
44 (((
45 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
46
47
48 )))
49
50 (((
51 [[image:1653295757274-912.png]]
52
53
54 )))
55
56 == 1.2  Specifications ==
57
58 (((
59
60
61 (% style="color:#037691" %)**Hardware System:**
62 )))
63
64 * (((
65 STM32L072xxxx MCU
66 )))
67 * (((
68 SX1276/78 Wireless Chip 
69 )))
70 * (((
71 (((
72 Power Consumption:
73 )))
74
75 * (((
76 Idle: 4mA@12v
77 )))
78 * (((
79 20dB Transmit: 34mA@12v
80 )))
81 )))
82
83 (((
84
85
86 (% style="color:#037691" %)**Interface for Model: LT22222-L:**
87 )))
88
89 * (((
90 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
91 )))
92 * (((
93 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
94 )))
95 * (((
96 2 x Relay Output (5A@250VAC / 30VDC)
97 )))
98 * (((
99 2 x 0~~20mA Analog Input (res:0.01mA)
100 )))
101 * (((
102 2 x 0~~30V Analog Input (res:0.01v)
103 )))
104 * (((
105 Power Input 7~~ 24V DC. 
106 )))
107
108 (((
109
110
111 (% style="color:#037691" %)**LoRa Spec:**
112 )))
113
114 * (((
115 (((
116 Frequency Range:
117 )))
118
119 * (((
120 Band 1 (HF): 862 ~~ 1020 Mhz
121 )))
122 * (((
123 Band 2 (LF): 410 ~~ 528 Mhz
124 )))
125 )))
126 * (((
127 168 dB maximum link budget.
128 )))
129 * (((
130 +20 dBm - 100 mW constant RF output vs.
131 )))
132 * (((
133 +14 dBm high efficiency PA.
134 )))
135 * (((
136 Programmable bit rate up to 300 kbps.
137 )))
138 * (((
139 High sensitivity: down to -148 dBm.
140 )))
141 * (((
142 Bullet-proof front end: IIP3 = -12.5 dBm.
143 )))
144 * (((
145 Excellent blocking immunity.
146 )))
147 * (((
148 Low RX current of 10.3 mA, 200 nA register retention.
149 )))
150 * (((
151 Fully integrated synthesizer with a resolution of 61 Hz.
152 )))
153 * (((
154 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
155 )))
156 * (((
157 Built-in bit synchronizer for clock recovery.
158 )))
159 * (((
160 Preamble detection.
161 )))
162 * (((
163 127 dB Dynamic Range RSSI.
164 )))
165 * (((
166 Automatic RF Sense and CAD with ultra-fast AFC.
167 )))
168 * (((
169 Packet engine up to 256 bytes with CRC.
170
171
172
173 )))
174
175 == 1.3 Features ==
176
177
178 * LoRaWAN Class A & Class C protocol
179
180 * Optional Customized LoRa Protocol
181
182 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
183
184 * AT Commands to change parameters
185
186 * Remote configure parameters via LoRa Downlink
187
188 * Firmware upgradable via program port
189
190 * Counting
191
192
193 == 1.4  Applications ==
194
195
196 * Smart Buildings & Home Automation
197
198 * Logistics and Supply Chain Management
199
200 * Smart Metering
201
202 * Smart Agriculture
203
204 * Smart Cities
205
206 * Smart Factory
207
208
209 == 1.5 Hardware Variants ==
210
211
212 (% border="1" style="background-color:#f2f2f2; width:500px" %)
213 |(% style="background-color:#d9e2f3; color:#0070c0; width:103px" %)**Model**|(% style="background-color:#d9e2f3; color:#0070c0; width:131px" %)**Photo**|(% style="background-color:#d9e2f3; color:#0070c0; width:334px" %)**Description**
214 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)(((
215 (% style="text-align:center" %)
216 [[image:image-20230424115112-1.png||height="106" width="58"]]
217 )))|(% style="width:334px" %)(((
218 * 2 x Digital Input (Bi-direction)
219 * 2 x Digital Output
220 * 2 x Relay Output (5A@250VAC / 30VDC)
221 * 2 x 0~~20mA Analog Input (res:0.01mA)
222 * 2 x 0~~30V Analog Input (res:0.01v)
223 * 1 x Counting Port
224 )))
225
226
227 = 2. Power ON Device =
228
229
230 (((
231 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.
232 )))
233
234 (((
235 PWR will on when device is properly powered.
236
237
238 )))
239
240 [[image:1653297104069-180.png]]
241
242
243 = 3. Operation Mode =
244
245 == 3.1 How it works? ==
246
247
248 (((
249 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. 
250 )))
251
252 (((
253 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.
254 )))
255
256
257 == 3.2 Example to join LoRaWAN network ==
258
259
260 (((
261 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. 
262
263
264 )))
265
266 [[image:image-20220523172350-1.png||height="266" width="864"]]
267
268
269 (((
270 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:
271
272
273 )))
274
275 (((
276 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
277 )))
278
279 (((
280 Each LT is shipped with a sticker with the default device EUI as below:
281 )))
282
283 [[image:image-20230425173427-2.png||height="246" width="530"]]
284
285
286 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
287
288 **Add APP EUI in the application.**
289
290 [[image:1653297955910-247.png||height="321" width="716"]]
291
292
293 **Add APP KEY and DEV EUI**
294
295 [[image:1653298023685-319.png]]
296
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 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
315 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
316 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
317 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
318 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
319
320
321 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
322
323
324 (((
325 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
326
327 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
328 |**Size(bytes)(% style="display:none" %) (%%)**|**2**|**2**|**2**|**2**|**1**|**1**|**1**
329 |Value|(((
330 AVI1
331 voltage
332 )))|(((
333 AVI2
334 voltage
335 )))|(((
336 ACI1
337 Current
338 )))|(((
339 ACI2
340 Current
341 )))|DIDORO*|(((
342 Reserve
343 )))|MOD
344 )))
345
346 (((
347
348
349 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
350
351 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
352 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
353 |RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
354 )))
355
356
357 * RO is for relay. ROx=1 : close，ROx=0 always open.
358 * DI is for digital input. DIx=1: high or float, DIx=0: low.
359 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
360
361 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
362
363 For example if payload is: [[image:image-20220523175847-2.png]]
364
365
366 **The value for the interface is:  **
367
368 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
369
370 AVI2 channel voltage is 0x04AC/1000=1.196V
371
372 ACI1 channel current is 0x1310/1000=4.880mA
373
374 ACI2 channel current is 0x1300/1000=4.864mA
375
376 The last byte 0xAA= 10101010(B) means
377
378 * [1] RO1 relay channel is close and the RO1 LED is ON.
379 * [0] RO2 relay channel is open and RO2 LED is OFF;
380
381 **LT22222-L:**
382
383 * [1] DI2 channel is high input and DI2 LED is ON;
384 * [0] DI1 channel is low input;
385
386 * [0] DO3 channel output state
387 ** DO3 is float in case no load between DO3 and V+.;
388 ** DO3 is high in case there is load between DO3 and V+.
389 ** DO3 LED is off in both case
390 * [1] DO2 channel output is low and DO2 LED is ON.
391 * [0] DO1 channel output state
392 ** DO1 is float in case no load between DO1 and V+.;
393 ** DO1 is high in case there is load between DO1 and V+.
394 ** DO1 LED is off in both case
395
396
397 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
398
399
400 (((
401 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
402 )))
403
404 (((
405 Total : 11 bytes payload
406
407 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
408 |**Size(bytes)**|**4**|**4**|**1**|**1**|**1**
409 |Value|COUNT1|COUNT2 |DIDORO*|(((
410 Reserve
411
412
413 )))|MOD
414 )))
415
416 (((
417
418
419 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
420
421 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
422 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
423 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
424
425 RO is for relay. ROx=1 : close，ROx=0 always open.
426 )))
427
428 * FIRST: Indicate this is the first packet after join network.
429 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
430
431 (((
432 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
433 )))
434
435 (((
436
437
438 **To use counting mode, please run:**
439 )))
440
441 (% class="box infomessage" %)
442 (((
443 (((
444 (((
445 **AT+MOD=2**
446 )))
447
448 (((
449 **ATZ**
450 )))
451 )))
452 )))
453
454 (((
455
456
457 (% style="color:#4f81bd" %)**AT Commands for counting:**
458
459
460 )))
461
462 (((
463 **For LT22222-L:**
464
465
466 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
467
468 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
469
470 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
471
472 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
473
474 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
475
476 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
477 )))
478
479
480 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
481
482
483 **LT22222-L**: This mode the DI1 is used as a counting pin.
484
485 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
486 |**Size(bytes)**|**4**|**2**|**2**|**1**|**1**|**1**
487 |Value|COUNT1|(((
488 ACI1 Current
489 )))|(((
490 ACI2 Current
491 )))|DIDORO*|Reserve|MOD
492
493 (((
494
495
496 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
497
498 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
499 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
500 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
501 )))
502
503
504 * RO is for relay. ROx=1 : close，ROx=0 always open.
505 * FIRST: Indicate this is the first packet after join network.
506 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
507
508 (((
509 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
510 )))
511
512
513 (((
514 **To use counting mode, please run:**
515 )))
516
517 (% class="box infomessage" %)
518 (((
519 (((
520 (((
521 **AT+MOD=3**
522 )))
523
524 (((
525 **ATZ**
526 )))
527 )))
528 )))
529
530 (((
531 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
532 )))
533
534
535 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
536
537
538 (((
539 **LT22222-L**: This mode the DI1 is used as a counting pin.
540 )))
541
542 (((
543 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.
544
545 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
546 |**Size(bytes)**|**4**|**4**|**1**|**1**|**1**
547 |Value|COUNT1|AVI1 Counting|DIDORO*|(((
548 Reserve
549
550
551 )))|MOD
552 )))
553
554
555 (((
556 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
557
558 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
559 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
560 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
561 )))
562
563
564 * RO is for relay. ROx=1 : close，ROx=0 always open.
565 * FIRST: Indicate this is the first packet after join network.
566 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
567
568 (((
569 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
570 )))
571
572 (((
573
574
575 **To use this mode, please run:**
576 )))
577
578 (% class="box infomessage" %)
579 (((
580 (((
581 (((
582 **AT+MOD=4**
583 )))
584
585 (((
586 **ATZ**
587 )))
588 )))
589 )))
590
591
592 (((
593 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
594 )))
595
596 (((
597
598
599 **Plus below command for AVI1 Counting:**
600
601
602 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
603
604 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
605
606 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
607
608 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
609 )))
610
611
612 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
613
614
615 **LT22222-L**: This mode the DI1 is used as a counting pin.
616
617 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
618 |**Size(bytes)**|**2**|**2**|**2**|**2**|**1**|**1**|**1**
619 |Value|(((
620 AVI1
621 voltage
622 )))|(((
623 AVI2
624 voltage
625 )))|(((
626 ACI1
627 Current
628 )))|COUNT1|DIDORO*|(((
629 Reserve
630 )))|MOD
631
632 (((
633
634
635 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
636
637 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
638 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
639 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
640 )))
641
642 * RO is for relay. ROx=1 : close，ROx=0 always open.
643 * FIRST: Indicate this is the first packet after join network.
644 * (((
645 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
646 )))
647
648 (((
649 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
650 )))
651
652 (((
653
654
655 **To use this mode, please run:**
656 )))
657
658 (% class="box infomessage" %)
659 (((
660 (((
661 (((
662 **AT+MOD=5**
663 )))
664
665 (((
666 **ATZ**
667 )))
668 )))
669 )))
670
671 (((
672 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
673 )))
674
675
676 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
677
678
679 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
680
681 For example, if user has configured below commands:
682
683 * **AT+MOD=1 ** **~-~->**  The normal working mode
684 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
685
686 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
687
688 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
689 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.**
690
691 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
692
693
694 (% style="color:#4f81bd" %)**Trigger base on voltage**:
695
696 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
697
698
699 **Example:**
700
701 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)
702
703 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
704
705
706
707 (% style="color:#4f81bd" %)**Trigger base on current**:
708
709 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
710
711
712 **Example:**
713
714 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
715
716
717
718 (% style="color:#4f81bd" %)**Trigger base on DI status**:
719
720 DI status trigger Flag.
721
722 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
723
724
725 **Example:**
726
727 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
728
729
730 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
731
732 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
733
734 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
735
736 AA: Code for this downlink Command:
737
738 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
739
740 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
741
742 yy2 yy2: AC1 or AV1 high limit.
743
744 yy3 yy3: AC2 or AV2 low limit.
745
746 Yy4 yy4: AC2 or AV2 high limit.
747
748
749 **Example1**: AA 00 13 88 00 00 00 00 00 00
750
751 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
752
753
754 **Example2**: AA 02 01 00
755
756 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
757
758
759
760 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
761
762 MOD6 Payload : total 11 bytes payload
763
764 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
765 |**Size(bytes)**|**1**|**1**|**1**|**6**|**1**|**1**
766 |Value|(((
767 TRI_A
768 FLAG
769 )))|(((
770 TRI_A
771 Status
772 )))|(((
773 TRI_DI
774 FLAG+STA
775 )))|Reserve|Enable/Disable MOD6|(((
776 MOD
777 (6)
778 )))
779
780 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
781
782 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
783 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
784 |(((
785 AV1_
786 LOW
787 )))|(((
788 AV1_
789 HIGH
790 )))|(((
791 AV2_
792 LOW
793 )))|(((
794 AV2_
795 HIGH
796 )))|(((
797 AC1_
798 LOW
799 )))|(((
800 AC1_
801 HIGH
802 )))|(((
803 AC2_
804 LOW
805 )))|(((
806 AC2_
807 HIGH
808 )))
809
810 * Each bits shows if the corresponding trigger has been configured.
811
812 **Example:**
813
814 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
815
816
817 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
818
819 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
820 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
821 |(((
822 AV1_
823 LOW
824 )))|(((
825 AV1_
826 HIGH
827 )))|(((
828 AV2_
829 LOW
830 )))|(((
831 AV2_
832 HIGH
833 )))|(((
834 AC1_
835 LOW
836 )))|(((
837 AC1_
838 HIGH
839 )))|(((
840 AC2_
841 LOW
842 )))|(((
843 AC2_
844 HIGH
845 )))
846
847 * Each bits shows which status has been trigger on this uplink.
848
849 **Example:**
850
851 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
852
853
854 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
855
856 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
857 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
858 |N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
859
860 * Each bits shows which status has been trigger on this uplink.
861
862 **Example:**
863
864 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
865
866 00000101: Means both DI1 and DI2 trigger are enabled.
867
868
869 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
870
871 Downlink command to poll MOD6 status:
872
873 **AB 06**
874
875 When device got this command, it will send the MOD6 payload.
876
877
878 === 3.3.7 Payload Decoder ===
879
880 (((
881
882
883 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
884 )))
885
886
887 == 3.4 ​Configure LT via AT or Downlink ==
888
889
890 (((
891 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
892 )))
893
894 (((
895 (((
896 There are two kinds of Commands:
897 )))
898 )))
899
900 * (% 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]]
901
902 * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
903
904
905 === 3.4.1 Common Commands ===
906
907
908 (((
909 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]]
910 )))
911
912
913 === 3.4.2 Sensor related commands ===
914
915 ==== 3.4.2.1 Set Transmit Interval ====
916
917
918 Set device uplink interval.
919
920 * (% style="color:#037691" %)**AT Command:**
921
922 (% style="color:blue" %)**AT+TDC=N **
923
924
925 **Example: **AT+TDC=30000. Means set interval to 30 seconds
926
927
928 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
929
930 (% style="color:blue" %)**0x01 aa bb cc  **(%%)** ~/~/ Same as AT+TDC=0x(aa bb cc)**
931
932
933
934 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
935
936
937 Set work mode.
938
939 * (% style="color:#037691" %)**AT Command:**
940
941 (% style="color:blue" %)**AT+MOD=N  **
942
943
944 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
945
946
947 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
948
949 (% style="color:blue" %)**0x0A aa  **(%%)** ** ~/~/ Same as AT+MOD=aa
950
951
952
953 ==== 3.4.2.3 Poll an uplink ====
954
955
956 * (% style="color:#037691" %)**AT Command:**
957
958 There is no AT Command to poll uplink
959
960
961 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
962
963 (% style="color:blue" %)**0x08 FF  **(%%)** **~/~/ Poll an uplink
964
965
966 **Example**: 0x08FF, ask device to send an Uplink
967
968
969
970 ==== 3.4.2.4 Enable Trigger Mode ====
971
972
973 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
974
975 * (% style="color:#037691" %)**AT Command:**
976
977 (% style="color:blue" %)**AT+ADDMOD6=1 or 0**
978
979 (% style="color:red" %)**1:** (%%)Enable Trigger Mode
980
981 (% style="color:red" %)**0: **(%%)Disable Trigger Mode
982
983
984 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
985
986 (% style="color:blue" %)**0x0A 06 aa    **(%%) ~/~/ Same as AT+ADDMOD6=aa
987
988
989
990 ==== 3.4.2.5 Poll trigger settings ====
991
992
993 Poll trigger settings,
994
995 * (% style="color:#037691" %)**AT Command:**
996
997 There is no AT Command for this feature.
998
999
1000 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
1001
1002 (% style="color:blue" %)**0xAB 06  ** (%%) ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
1003
1004
1005
1006 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
1007
1008
1009 Enable Disable DI1/DI2/DI2 as trigger,
1010
1011 * (% style="color:#037691" %)**AT Command:**
1012
1013 (% style="color:blue" %)**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
1014
1015
1016 **Example:**
1017
1018 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
1019
1020 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
1021
1022 (% style="color:blue" %)**0xAA 02 aa bb   ** (%%) ~/~/ Same as AT+DTRI=aa,bb
1023
1024
1025
1026 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
1027
1028
1029 Set DI1 or DI3(for LT-33222-L) trigger.
1030
1031 * (% style="color:#037691" %)**AT Command:**
1032
1033 (% style="color:blue" %)**AT+TRIG1=a,b**
1034
1035 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
1036
1037 (% style="color:red" %)**b :** (%%)delay timing.
1038
1039
1040 **Example:**
1041
1042 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
1043
1044
1045 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
1046
1047 (% style="color:blue" %)**0x09 01 aa bb cc    ** (%%) ~/~/ same as AT+TRIG1=aa,0x(bb cc)
1048
1049
1050
1051 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
1052
1053
1054 Set DI2 trigger.
1055
1056 * (% style="color:#037691" %)**AT Command:**
1057
1058 (% style="color:blue" %)**AT+TRIG2=a,b**
1059
1060 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
1061
1062 (% style="color:red" %)**b :** (%%)delay timing.
1063
1064
1065 **Example:**
1066
1067 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
1068
1069
1070 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
1071
1072 (% style="color:blue" %)**0x09 02 aa bb cc   ** (%%)~/~/ same as AT+TRIG2=aa,0x(bb cc)
1073
1074
1075
1076 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
1077
1078
1079 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1080
1081 * (% style="color:#037691" %)**AT Command**
1082
1083 (% style="color:blue" %)**AT+ACLIM**
1084
1085
1086 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
1087
1088 (% 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"]]
1089
1090
1091
1092 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1093
1094
1095 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1096
1097 * (% style="color:#037691" %)**AT Command**
1098
1099 (% style="color:blue" %)**AT+AVLIM    **(%%)** See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1100
1101
1102 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
1103
1104 (% 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"]]
1105
1106
1107
1108 ==== 3.4.2.11 Trigger – Set minimum interval ====
1109
1110
1111 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
1112
1113 * (% style="color:#037691" %)**AT Command**
1114
1115 (% style="color:blue" %)**AT+ATDC=5        ** (%%)Device won't response the second trigger within 5 minute after the first trigger.
1116
1117
1118 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
1119
1120 (% style="color:blue" %)**0x AC aa bb   **(%%) ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
1121
1122 (((
1123
1124
1125 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
1126 )))
1127
1128
1129
1130 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1131
1132
1133 * (% style="color:#037691" %)**AT Command**
1134
1135 There is no AT Command to control Digital Output
1136
1137
1138 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1139 * (% style="color:blue" %)**0x02 aa bb cc     ** (%%)~/~/ Set DO1/DO2/DO3 output
1140
1141 (((
1142 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1143 )))
1144
1145 (((
1146 01: Low,  00: High ,  11: No action
1147
1148 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1149 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**DO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**DO2**|(% style="background-color:#d9e2f3; color:#0070c0" %)**DO3**
1150 |02  01  00  11|Low|High|No Action
1151 |02  00  11  01|High|No Action|Low
1152 |02  11  01  00|No Action|Low|High
1153 )))
1154
1155
1156 (((
1157 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1158 )))
1159
1160 (((
1161 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1162 )))
1163
1164
1165
1166 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1167
1168
1169 * (% style="color:#037691" %)**AT Command**
1170
1171 There is no AT Command to control Digital Output
1172
1173
1174 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1175
1176 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1177
1178
1179 This is to control the digital output time of DO pin. Include four bytes:
1180
1181 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1182
1183 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1184
1185 01: DO pins will change back to original state after timeout.
1186
1187 00: DO pins will change to an inverter state after timeout 
1188
1189
1190 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1191
1192 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1193 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1194 |0x01|DO1 set to low
1195 |0x00|DO1 set to high
1196 |0x11|DO1 NO Action
1197
1198 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1199
1200 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1201 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1202 |0x01|DO2 set to low
1203 |0x00|DO2 set to high
1204 |0x11|DO2 NO Action
1205
1206 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1207
1208 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1209 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1210 |0x01|DO3 set to low
1211 |0x00|DO3 set to high
1212 |0x11|DO3 NO Action
1213
1214 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:(%%) Latching time. Unit: ms
1215
1216
1217 (% style="color:red" %)**Note: **
1218
1219 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1220
1221 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1222
1223
1224 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1225
1226
1227 **Example payload:**
1228
1229 **~1. A9 01 01 01 01 07 D0**
1230
1231 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1232
1233 **2. A9 01 00 01 11 07 D0**
1234
1235 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1236
1237 **3. A9 00 00 00 00 07 D0**
1238
1239 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1240
1241 **4. A9 00 11 01 00 07 D0**
1242
1243 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
1244
1245
1246
1247 ==== 3.4.2. 14 Relay ~-~- Control Relay Output RO1/RO2 ====
1248
1249
1250 * (% style="color:#037691" %)**AT Command:**
1251
1252 There is no AT Command to control Relay Output
1253
1254
1255 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1256
1257 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1258
1259
1260 (((
1261 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1262 )))
1263
1264 (((
1265 01: Close ,  00: Open , 11: No action
1266
1267 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1268 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO2**
1269 |03  00  11|Open|No Action
1270 |03  01  11|Close|No Action
1271 |03  11  00|No Action|Open
1272 |03  11  01|No Action|Close
1273 |03  00  00|Open|Open
1274 |03  01  01|Close|Close
1275 |03  01  00|Close|Open
1276 |03  00  01|Open|Close
1277 )))
1278
1279 (((
1280
1281 )))
1282
1283 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1284
1285
1286
1287 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1288
1289
1290 * (% style="color:#037691" %)**AT Command:**
1291
1292 There is no AT Command to control Relay Output
1293
1294
1295 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1296
1297 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1298
1299
1300 This is to control the relay output time of relay. Include four bytes:
1301
1302 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1303
1304 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1305
1306 01: Relays will change back to original state after timeout.
1307
1308 00: Relays will change to an inverter state after timeout
1309
1310
1311 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1312
1313 [[image:image-20221008095908-1.png||height="364" width="564"]]
1314
1315
1316 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1317
1318
1319 (% style="color:red" %)**Note:**
1320
1321 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1322
1323 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1324
1325
1326 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1327
1328
1329 **Example payload:**
1330
1331 **~1. 05 01 11 07 D0**
1332
1333 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1334
1335 **2. 05 01 10 07 D0**
1336
1337 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1338
1339 **3. 05 00 01 07 D0**
1340
1341 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1342
1343 **4. 05 00 00 07 D0**
1344
1345 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1346
1347
1348
1349 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1350
1351
1352 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1353
1354 * (% style="color:#037691" %)**AT Command:**
1355
1356 (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1357
1358
1359 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1360
1361 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1362
1363
1364
1365 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1366
1367
1368 * (% style="color:#037691" %)**AT Command:**
1369
1370 (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1371
1372 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1373
1374 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1375
1376
1377 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1378
1379 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1380
1381
1382
1383 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1384
1385
1386 Clear counting for counting mode
1387
1388 * (% style="color:#037691" %)**AT Command:**
1389
1390 (% style="color:blue" %)**AT+CLRCOUNT **(%%) ~/~/ clear all counting
1391
1392
1393 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1394
1395 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1396
1397
1398
1399 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1400
1401
1402 * (% style="color:#037691" %)**AT Command:**
1403
1404 (% 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)
1405
1406
1407 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1408
1409 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1410
1411 (((
1412 range: aa bb cc:0 to 16777215,  (unit:second)
1413 )))
1414
1415
1416
1417 ==== 3.4.2.20 Reset save RO DO state ====
1418
1419
1420 * (% style="color:#037691" %)**AT Command:**
1421
1422 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1423
1424 (% 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.
1425
1426
1427 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1428
1429 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1430
1431
1432
1433 ==== 3.4.2.21 Encrypted payload ====
1434
1435
1436 * (% style="color:#037691" %)**AT Command:**
1437
1438 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1439
1440 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1441
1442
1443
1444 ==== 3.4.2.22 Get sensor value ====
1445
1446
1447 * (% style="color:#037691" %)**AT Command:**
1448
1449 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1450
1451 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1452
1453
1454
1455 ==== 3.4.2.23 Resets the downlink packet count ====
1456
1457
1458 * (% style="color:#037691" %)**AT Command:**
1459
1460 (% 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)
1461
1462 (% 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.
1463
1464
1465
1466 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1467
1468
1469 * (% style="color:#037691" %)**AT Command:**
1470
1471 (% 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)
1472
1473 (% 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.
1474
1475
1476 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1477
1478 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1479
1480
1481
1482 ==== 3.4.2.25 Copy downlink to uplink ====
1483
1484
1485 * (% style="color:#037691" %)**AT Command**(%%)**:**
1486
1487 (% 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.
1488
1489 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.
1490
1491
1492 [[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"]]
1493
1494 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1495
1496
1497
1498 [[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"]]
1499
1500 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1501
1502
1503
1504 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1505
1506
1507 * (((
1508 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1509
1510 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1511
1512
1513 )))
1514
1515 **Example：**
1516
1517 [[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"]]
1518
1519
1520 == 3.5 Integrate with Mydevice ==
1521
1522
1523 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:
1524
1525 (((
1526 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1527 )))
1528
1529 (((
1530 (% 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:
1531
1532
1533 )))
1534
1535 [[image:image-20220719105525-1.png||height="377" width="677"]]
1536
1537
1538
1539 [[image:image-20220719110247-2.png||height="388" width="683"]]
1540
1541
1542 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1543
1544 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L) and add DevEUI.(% style="display:none" %)
1545
1546 Search under The things network
1547
1548 [[image:1653356838789-523.png||height="337" width="740"]]
1549
1550
1551
1552 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1553
1554 [[image:image-20220524094909-1.png||height="335" width="729"]]
1555
1556
1557 [[image:image-20220524094909-2.png||height="337" width="729"]]
1558
1559
1560 [[image:image-20220524094909-3.png||height="338" width="727"]]
1561
1562
1563 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1564
1565
1566 [[image:image-20220524094909-5.png||height="341" width="734"]]
1567
1568
1569 == 3.6 Interface Detail ==
1570
1571 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1572
1573
1574 Support NPN Type sensor
1575
1576 [[image:1653356991268-289.png]]
1577
1578
1579 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1580
1581
1582 (((
1583 The DI port of LT-22222-L can support NPN or PNP output sensor.
1584 )))
1585
1586 (((
1587 (((
1588 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. When there is active current pass NEC2501 pin1 to pin2. The DI will be active high.
1589
1590
1591 )))
1592 )))
1593
1594 [[image:1653357170703-587.png]]
1595
1596 (((
1597 (((
1598 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1599 )))
1600 )))
1601
1602 (((
1603
1604 )))
1605
1606 (((
1607 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1608 )))
1609
1610 (((
1611 This type of sensor will output a low signal GND when active.
1612 )))
1613
1614 * (((
1615 Connect sensor's output to DI1-
1616 )))
1617 * (((
1618 Connect sensor's VCC to DI1+.
1619 )))
1620
1621 (((
1622 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1623 )))
1624
1625 (((
1626 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1627 )))
1628
1629 (((
1630 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.
1631 )))
1632
1633 (((
1634
1635 )))
1636
1637 (((
1638 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1639 )))
1640
1641 (((
1642 This type of sensor will output a high signal (example 24v) when active.
1643 )))
1644
1645 * (((
1646 Connect sensor's output to DI1+
1647 )))
1648 * (((
1649 Connect sensor's GND DI1-.
1650 )))
1651
1652 (((
1653 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1654 )))
1655
1656 (((
1657 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1658 )))
1659
1660 (((
1661 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.
1662 )))
1663
1664 (((
1665
1666 )))
1667
1668 (((
1669 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1670 )))
1671
1672 (((
1673 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1674 )))
1675
1676 * (((
1677 Connect sensor's output to DI1+ with a serial 50K resistor
1678 )))
1679 * (((
1680 Connect sensor's GND DI1-.
1681 )))
1682
1683 (((
1684 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1685 )))
1686
1687 (((
1688 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1689 )))
1690
1691 (((
1692 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.
1693 )))
1694
1695
1696 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1697
1698
1699 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1700
1701 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1702
1703 [[image:1653357531600-905.png]]
1704
1705
1706 === 3.6.4 Analog Input Interface ===
1707
1708
1709 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:
1710
1711
1712 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1713
1714 [[image:1653357592296-182.png]]
1715
1716 Example to connect a 4~~20mA sensor
1717
1718 We take the wind speed sensor as an example for reference only.
1719
1720
1721 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1722
1723 (% style="color:red" %)**Red:  12~~24v**
1724
1725 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1726
1727 **Black:  GND**
1728
1729 **Connection diagram:**
1730
1731 [[image:1653357640609-758.png]]
1732
1733 [[image:1653357648330-671.png||height="155" width="733"]]
1734
1735
1736 Example connected to a regulated power supply to measure voltage
1737
1738 [[image:image-20230608101532-1.png||height="606" width="447"]]
1739
1740 [[image:image-20230608101608-2.jpeg||height="379" width="284"]]
1741
1742 [[image:image-20230608101722-3.png||height="102" width="1139"]]
1743
1744
1745 (% style="color:blue; font-weight:bold" %)**Specifications of the regulated power**(%%) (% style="color:blue" %)**:**
1746
1747 (% style="color:red" %)**Red:  12~~24v**
1748
1749 **Black:  GND**
1750
1751
1752 === 3.6.5 Relay Output ===
1753
1754
1755 (((
1756 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:
1757
1758 **Note**: RO pins go to Open(NO) when device is power off.
1759 )))
1760
1761 [[image:image-20220524100215-9.png]]
1762
1763
1764 [[image:image-20220524100215-10.png||height="382" width="723"]]
1765
1766
1767 == 3.7 LEDs Indicators ==
1768
1769
1770 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1771 |(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**LEDs**|(% style="background-color:#d9e2f3; color:#0070c0; width:470px" %)**Feature**
1772 |**PWR**|Always on if there is power
1773 |**SYS**|(((
1774 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.
1775 )))
1776 |**TX**|(((
1777 (((
1778 Device boot: TX blinks 5 times.
1779 )))
1780
1781 (((
1782 Successful join network: TX ON for 5 seconds.
1783 )))
1784
1785 (((
1786 Transmit a LoRa packet: TX blinks once
1787 )))
1788 )))
1789 |**RX**|RX blinks once when receive a packet.
1790 |**DO1**|
1791 |**DO2**|
1792 |**DO3**|
1793 |**DI2**|(((
1794 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1795 )))
1796 |**DI2**|(((
1797 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1798 )))
1799 |**DI2**|(((
1800 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1801 )))
1802 |**RO1**|
1803 |**RO2**|
1804
1805
1806 = 4. Use AT Command =
1807
1808 == 4.1 Access AT Command ==
1809
1810
1811 (((
1812 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.
1813 )))
1814
1815 (((
1816
1817 )))
1818
1819 [[image:1653358238933-385.png]]
1820
1821
1822 (((
1823 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:
1824 )))
1825
1826 [[image:1653358355238-883.png]]
1827
1828
1829 (((
1830 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/]]
1831 )))
1832
1833 (((
1834 AT+<CMD>?        : Help on <CMD>
1835 )))
1836
1837 (((
1838 AT+<CMD>         : Run <CMD>
1839 )))
1840
1841 (((
1842 AT+<CMD>=<value> : Set the value
1843 )))
1844
1845 (((
1846 AT+<CMD>=?       :  Get the value
1847 )))
1848
1849 (((
1850 ATZ: Trig a reset of the MCU
1851 )))
1852
1853 (((
1854 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1855 )))
1856
1857 (((
1858 AT+DEUI: Get or Set the Device EUI
1859 )))
1860
1861 (((
1862 AT+DADDR: Get or Set the Device Address
1863 )))
1864
1865 (((
1866 AT+APPKEY: Get or Set the Application Key
1867 )))
1868
1869 (((
1870 AT+NWKSKEY: Get or Set the Network Session Key
1871 )))
1872
1873 (((
1874 AT+APPSKEY:  Get or Set the Application Session Key
1875 )))
1876
1877 (((
1878 AT+APPEUI:  Get or Set the Application EUI
1879 )))
1880
1881 (((
1882 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1883 )))
1884
1885 (((
1886 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1887 )))
1888
1889 (((
1890 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1891 )))
1892
1893 (((
1894 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1895 )))
1896
1897 (((
1898 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1899 )))
1900
1901 (((
1902 AT+RX2FQ: Get or Set the Rx2 window frequency
1903 )))
1904
1905 (((
1906 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1907 )))
1908
1909 (((
1910 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1911 )))
1912
1913 (((
1914 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1915 )))
1916
1917 (((
1918 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1919 )))
1920
1921 (((
1922 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1923 )))
1924
1925 (((
1926 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1927 )))
1928
1929 (((
1930 AT+NWKID: Get or Set the Network ID
1931 )))
1932
1933 (((
1934 AT+FCU: Get or Set the Frame Counter Uplink
1935 )))
1936
1937 (((
1938 AT+FCD: Get or Set the Frame Counter Downlink
1939 )))
1940
1941 (((
1942 AT+CLASS: Get or Set the Device Class
1943 )))
1944
1945 (((
1946 AT+JOIN: Join network
1947 )))
1948
1949 (((
1950 AT+NJS: Get OTAA Join Status
1951 )))
1952
1953 (((
1954 AT+SENDB: Send hexadecimal data along with the application port
1955 )))
1956
1957 (((
1958 AT+SEND: Send text data along with the application port
1959 )))
1960
1961 (((
1962 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1963 )))
1964
1965 (((
1966 AT+RECV: Print last received data in raw format
1967 )))
1968
1969 (((
1970 AT+VER:  Get current image version and Frequency Band
1971 )))
1972
1973 (((
1974 AT+CFM: Get or Set the confirmation mode (0-1)
1975 )))
1976
1977 (((
1978 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1979 )))
1980
1981 (((
1982 AT+SNR: Get the SNR of the last received packet
1983 )))
1984
1985 (((
1986 AT+RSSI: Get the RSSI of the last received packet
1987 )))
1988
1989 (((
1990 AT+TDC: Get or set the application data transmission interval in ms
1991 )))
1992
1993 (((
1994 AT+PORT: Get or set the application port
1995 )))
1996
1997 (((
1998 AT+DISAT: Disable AT commands
1999 )))
2000
2001 (((
2002 AT+PWORD: Set password, max 9 digits
2003 )))
2004
2005 (((
2006 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
2007 )))
2008
2009 (((
2010 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
2011 )))
2012
2013 (((
2014 AT+CFG: Print all settings
2015 )))
2016
2017
2018 == 4.2 Common AT Command Sequence ==
2019
2020 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
2021
2022 (((
2023
2024
2025 (((
2026 (% style="color:blue" %)**If device has not joined network yet:**
2027 )))
2028 )))
2029
2030 (((
2031 (% style="background-color:#dcdcdc" %)**123456**
2032 )))
2033
2034 (((
2035 (% style="background-color:#dcdcdc" %)**AT+FDR**
2036 )))
2037
2038 (((
2039 (% style="background-color:#dcdcdc" %)**123456**
2040 )))
2041
2042 (((
2043 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
2044 )))
2045
2046 (((
2047 (% style="background-color:#dcdcdc" %)**ATZ**
2048 )))
2049
2050
2051 (((
2052 (% style="color:blue" %)**If device already joined network:**
2053 )))
2054
2055 (((
2056 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
2057 )))
2058
2059 (((
2060 (% style="background-color:#dcdcdc" %)**ATZ**
2061 )))
2062
2063
2064 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
2065
2066 (((
2067
2068
2069 (((
2070 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
2071 )))
2072 )))
2073
2074 (((
2075 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
2076 )))
2077
2078 (((
2079 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
2080 )))
2081
2082 (((
2083 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
2084 )))
2085
2086 (((
2087 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
2088 )))
2089
2090 (((
2091 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
2092 )))
2093
2094 (((
2095 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
2096 )))
2097
2098 (((
2099 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
2100 )))
2101
2102 (((
2103 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
2104 )))
2105
2106 (((
2107 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
2108 )))
2109
2110 (((
2111 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
2112 )))
2113
2114 (((
2115 (% 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.
2116 )))
2117
2118 (((
2119 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2120
2121
2122 )))
2123
2124 (((
2125 (% style="color:red" %)**Note:**
2126 )))
2127
2128 (((
2129 **~1. Make sure the device is set to ABP mode in the IoT Server.**
2130
2131 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
2132
2133 **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?
2134 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2135
2136 **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.**
2137
2138
2139 )))
2140
2141 (((
2142 [[image:1653359097980-169.png||height="188" width="729"]]
2143 )))
2144
2145 (((
2146
2147 )))
2148
2149 === 4.2.3 Change to Class A ===
2150
2151
2152 (((
2153 (% style="color:blue" %)**If sensor JOINED:**
2154
2155 (% style="background-color:#dcdcdc" %)**AT+CLASS=A
2156 ATZ**
2157 )))
2158
2159
2160 = 5. Case Study =
2161
2162 == 5.1 Counting how many objects pass in Flow Line ==
2163
2164
2165 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
2166
2167
2168 = 6. FAQ =
2169
2170 == 6.1 How to upgrade the image? ==
2171
2172
2173 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2174
2175 * Support new features
2176 * For bug fix
2177 * Change LoRaWAN bands.
2178
2179 Below shows the hardware connection for how to upload an image to the LT:
2180
2181 [[image:1653359603330-121.png]]
2182
2183
2184 (((
2185 (% 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]].
2186 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:https://www.dropbox.com/sh/g99v0fxcltn9r1y/AADKXQ2v5ZT-S3sxdmbvE7UAa/LT-22222-L/image?dl=0&subfolder_nav_tracking=1]].
2187 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2188
2189
2190 (((
2191 (% style="color:blue" %)**For LT-22222-L**(%%):
2192 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.
2193 )))
2194
2195
2196 )))
2197
2198 [[image:image-20220524103407-12.png]]
2199
2200
2201 [[image:image-20220524103429-13.png]]
2202
2203
2204 [[image:image-20220524104033-15.png]]
2205
2206
2207 (% 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:
2208
2209
2210 [[image:1653360054704-518.png||height="186" width="745"]]
2211
2212
2213 (((
2214 (((
2215 == 6.2 How to change the LoRa Frequency Bands/Region? ==
2216
2217
2218 )))
2219 )))
2220
2221 (((
2222 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2223 )))
2224
2225 (((
2226
2227
2228 == 6.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2229
2230
2231 )))
2232
2233 (((
2234 (((
2235 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2236 )))
2237 )))
2238
2239 (((
2240 (((
2241 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2242
2243
2244 )))
2245 )))
2246
2247 (((
2248 (% 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.
2249
2250
2251 )))
2252
2253 (((
2254 [[image:1653360231087-571.png||height="401" width="727"]]
2255
2256
2257 )))
2258
2259 (((
2260 (% 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.**
2261 )))
2262
2263
2264
2265 (((
2266 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2267
2268
2269 )))
2270
2271 (((
2272 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2273 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2274 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2275 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2276 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2277 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2278 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2279 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2280 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2281 )))
2282
2283
2284 (((
2285 As shown in below:
2286 )))
2287
2288 [[image:1653360498588-932.png||height="485" width="726"]]
2289
2290
2291 == 6.4 How to change the uplink interval？ ==
2292
2293
2294 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/]]
2295
2296
2297 == 6.5 Can I see counting event in Serial? ==
2298
2299
2300 (((
2301 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.
2302
2303
2304 == 6.6 Can i use point to point communication for LT-22222-L? ==
2305
2306
2307 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]].
2308
2309
2310 )))
2311
2312 (((
2313 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2314
2315
2316 If the device is not shut down, but directly powered off.
2317
2318 It will default that this is a power-off state.
2319
2320 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2321
2322 After restart, the status before power failure will be read from flash.
2323
2324
2325 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2326
2327
2328 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2329
2330
2331 [[image:image-20221006170630-1.png||height="610" width="945"]]
2332
2333
2334 == 6.9 Can LT22222-L save RO state? ==
2335
2336
2337 Firmware version needs to be no less than 1.6.0.
2338
2339
2340 = 7. Trouble Shooting =
2341 )))
2342
2343 (((
2344 (((
2345 == 7.1 Downlink doesn't work, how to solve it? ==
2346
2347
2348 )))
2349 )))
2350
2351 (((
2352 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2353 )))
2354
2355 (((
2356
2357
2358 == 7.2 Have trouble to upload image. ==
2359
2360
2361 )))
2362
2363 (((
2364 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2365 )))
2366
2367 (((
2368
2369
2370 == 7.3 Why I can't join TTN in US915 /AU915 bands? ==
2371
2372
2373 )))
2374
2375 (((
2376 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2377 )))
2378
2379
2380 = 8. Order Info =
2381
2382
2383 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2384
2385 (% style="color:#4f81bd" %)**XXX:**
2386
2387 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2388 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2389 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2390 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2391 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2392 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2393 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2394 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2395 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2396
2397
2398 = 9. Packing Info =
2399
2400
2401 **Package Includes**:
2402
2403 * LT-22222-L I/O Controller x 1
2404 * Stick Antenna for LoRa RF part x 1
2405 * Bracket for controller x1
2406 * Program cable x 1
2407
2408 **Dimension and weight**:
2409
2410 * Device Size: 13.5 x 7 x 3 cm
2411 * Device Weight: 105g
2412 * Package Size / pcs : 14.5 x 8 x 5 cm
2413 * Weight / pcs : 170g
2414
2415
2416 = 10. Support =
2417
2418
2419 * (((
2420 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.
2421 )))
2422 * (((
2423 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]]
2424
2425
2426
2427 )))
2428
2429 = 11. Reference​​​​​ =
2430
2431
2432 * 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]]
2433 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2434 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]