Version 121.1 by Bei Jinggeng on 2023/06/08 10:17
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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
194 == 1.4  Applications ==
195
196
197 * Smart Buildings & Home Automation
198
199 * Logistics and Supply Chain Management
200
201 * Smart Metering
202
203 * Smart Agriculture
204
205 * Smart Cities
206
207 * Smart Factory
208
209
210
211 == 1.5 Hardware Variants ==
212
213
214 (% border="1" style="background-color:#f2f2f2; width:500px" %)
215 |(% 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**
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
229
230 = 2. Power ON Device =
231
232
233 (((
234 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.
235 )))
236
237 (((
238 PWR will on when device is properly powered.
239
240
241 )))
242
243 [[image:1653297104069-180.png]]
244
245
246 = 3. Operation Mode =
247
248 == 3.1 How it works? ==
249
250
251 (((
252 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. 
253 )))
254
255 (((
256 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.
257 )))
258
259
260 == 3.2 Example to join LoRaWAN network ==
261
262
263 (((
264 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. 
265
266
267 )))
268
269 [[image:image-20220523172350-1.png||height="266" width="864"]]
270
271
272 (((
273 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:
274
275
276 )))
277
278 (((
279 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
280 )))
281
282 (((
283 Each LT is shipped with a sticker with the default device EUI as below:
284 )))
285
286 [[image:image-20230425173427-2.png||height="246" width="530"]]
287
288
289 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
290
291 **Add APP EUI in the application.**
292
293 [[image:1653297955910-247.png||height="321" width="716"]]
294
295
296 **Add APP KEY and DEV EUI**
297
298 [[image:1653298023685-319.png]]
299
300
301
302 (((
303 (% 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.
304
305
306 )))
307
308 [[image:1653298044601-602.png||height="405" width="709"]]
309
310
311 == 3.3 Uplink Payload ==
312
313
314 There are five working modes + one interrupt mode on LT for different type application:
315
316 * (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
317 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
318 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
319 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
320 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
321 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
322
323
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:520px" %)
332 |**Size(bytes)(% style="display:none" %) (%%)**|**2**|**2**|**2**|**2**|**1**|**1**|**1**
333 |Value|(((
334 AVI1
335 voltage
336 )))|(((
337 AVI2
338 voltage
339 )))|(((
340 ACI1
341 Current
342 )))|(((
343 ACI2
344 Current
345 )))|DIDORO*|(((
346 Reserve
347 )))|MOD
348 )))
349
350 (((
351
352
353 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
354
355 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
356 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
357 |RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
358 )))
359
360
361 * RO is for relay. ROx=1 : close，ROx=0 always open.
362 * DI is for digital input. DIx=1: high or float, DIx=0: low.
363 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
364
365 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
366
367 For example if payload is: [[image:image-20220523175847-2.png]]
368
369
370 **The value for the interface is:  **
371
372 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
373
374 AVI2 channel voltage is 0x04AC/1000=1.196V
375
376 ACI1 channel current is 0x1310/1000=4.880mA
377
378 ACI2 channel current is 0x1300/1000=4.864mA
379
380 The last byte 0xAA= 10101010(B) means
381
382 * [1] RO1 relay channel is close and the RO1 LED is ON.
383 * [0] RO2 relay channel is open and RO2 LED is OFF;
384
385 **LT22222-L:**
386
387 * [1] DI2 channel is high input and DI2 LED is ON;
388 * [0] DI1 channel is low input;
389
390 * [0] DO3 channel output state
391 ** DO3 is float in case no load between DO3 and V+.;
392 ** DO3 is high in case there is load between DO3 and V+.
393 ** DO3 LED is off in both case
394 * [1] DO2 channel output is low and DO2 LED is ON.
395 * [0] DO1 channel output state
396 ** DO1 is float in case no load between DO1 and V+.;
397 ** DO1 is high in case there is load between DO1 and V+.
398 ** DO1 LED is off in both case
399
400
401
402 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
403
404
405 (((
406 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
407 )))
408
409 (((
410 Total : 11 bytes payload
411
412 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
413 |**Size(bytes)**|**4**|**4**|**1**|**1**|**1**
414 |Value|COUNT1|COUNT2 |DIDORO*|(((
415 Reserve
416
417
418 )))|MOD
419 )))
420
421 (((
422
423
424 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
425
426 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
427 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
428 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
429
430 RO is for relay. ROx=1 : close，ROx=0 always open.
431 )))
432
433 * FIRST: Indicate this is the first packet after join network.
434 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
435
436 (((
437 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
438 )))
439
440 (((
441
442
443 **To use counting mode, please run:**
444 )))
445
446 (% class="box infomessage" %)
447 (((
448 (((
449 (((
450 **AT+MOD=2**
451 )))
452
453 (((
454 **ATZ**
455 )))
456 )))
457 )))
458
459 (((
460
461
462 (% style="color:#4f81bd" %)**AT Commands for counting:**
463
464
465 )))
466
467 (((
468 **For LT22222-L:**
469
470
471 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
472
473 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
474
475 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
476
477 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
478
479 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
480
481 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
482 )))
483
484
485 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
486
487
488 **LT22222-L**: This mode the DI1 is used as a counting pin.
489
490 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
491 |**Size(bytes)**|**4**|**2**|**2**|**1**|**1**|**1**
492 |Value|COUNT1|(((
493 ACI1 Current
494 )))|(((
495 ACI2 Current
496 )))|DIDORO*|Reserve|MOD
497
498 (((
499
500
501 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
502
503 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
504 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
505 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
506 )))
507
508
509 * RO is for relay. ROx=1 : close，ROx=0 always open.
510 * FIRST: Indicate this is the first packet after join network.
511 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
512
513 (((
514 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
515 )))
516
517
518 (((
519 **To use counting mode, please run:**
520 )))
521
522 (% class="box infomessage" %)
523 (((
524 (((
525 (((
526 **AT+MOD=3**
527 )))
528
529 (((
530 **ATZ**
531 )))
532 )))
533 )))
534
535 (((
536 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
537 )))
538
539
540 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
541
542
543 (((
544 **LT22222-L**: This mode the DI1 is used as a counting pin.
545 )))
546
547 (((
548 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.
549
550 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
551 |**Size(bytes)**|**4**|**4**|**1**|**1**|**1**
552 |Value|COUNT1|AVI1 Counting|DIDORO*|(((
553 Reserve
554
555
556 )))|MOD
557 )))
558
559
560 (((
561 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
562
563 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
564 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
565 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
566 )))
567
568
569 * RO is for relay. ROx=1 : close，ROx=0 always open.
570 * FIRST: Indicate this is the first packet after join network.
571 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
572
573 (((
574 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
575 )))
576
577 (((
578
579
580 **To use this mode, please run:**
581 )))
582
583 (% class="box infomessage" %)
584 (((
585 (((
586 (((
587 **AT+MOD=4**
588 )))
589
590 (((
591 **ATZ**
592 )))
593 )))
594 )))
595
596
597 (((
598 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
599 )))
600
601 (((
602
603
604 **Plus below command for AVI1 Counting:**
605
606
607 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
608
609 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
610
611 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
612
613 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
614 )))
615
616
617 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
618
619
620 **LT22222-L**: This mode the DI1 is used as a counting pin.
621
622 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
623 |**Size(bytes)**|**2**|**2**|**2**|**2**|**1**|**1**|**1**
624 |Value|(((
625 AVI1
626 voltage
627 )))|(((
628 AVI2
629 voltage
630 )))|(((
631 ACI1
632 Current
633 )))|COUNT1|DIDORO*|(((
634 Reserve
635 )))|MOD
636
637 (((
638
639
640 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
641
642 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
643 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
644 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
645 )))
646
647 * RO is for relay. ROx=1 : close，ROx=0 always open.
648 * FIRST: Indicate this is the first packet after join network.
649 * (((
650 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
651 )))
652
653 (((
654 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
655 )))
656
657 (((
658
659
660 **To use this mode, please run:**
661 )))
662
663 (% class="box infomessage" %)
664 (((
665 (((
666 (((
667 **AT+MOD=5**
668 )))
669
670 (((
671 **ATZ**
672 )))
673 )))
674 )))
675
676 (((
677 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
678 )))
679
680
681 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
682
683
684 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
685
686 For example, if user has configured below commands:
687
688 * **AT+MOD=1 ** **~-~->**  The normal working mode
689 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
690
691 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
692
693 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
694 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.**
695
696 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
697
698
699 (% style="color:#4f81bd" %)**Trigger base on voltage**:
700
701 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
702
703
704 **Example:**
705
706 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)
707
708 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
709
710
711
712 (% style="color:#4f81bd" %)**Trigger base on current**:
713
714 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
715
716
717 **Example:**
718
719 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
720
721
722
723 (% style="color:#4f81bd" %)**Trigger base on DI status**:
724
725 DI status trigger Flag.
726
727 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
728
729
730 **Example:**
731
732 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
733
734
735 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
736
737 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
738
739 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
740
741 AA: Code for this downlink Command:
742
743 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
744
745 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
746
747 yy2 yy2: AC1 or AV1 high limit.
748
749 yy3 yy3: AC2 or AV2 low limit.
750
751 Yy4 yy4: AC2 or AV2 high limit.
752
753
754 **Example1**: AA 00 13 88 00 00 00 00 00 00
755
756 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
757
758
759 **Example2**: AA 02 01 00
760
761 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
762
763
764
765 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
766
767 MOD6 Payload : total 11 bytes payload
768
769 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
770 |**Size(bytes)**|**1**|**1**|**1**|**6**|**1**|**1**
771 |Value|(((
772 TRI_A
773 FLAG
774 )))|(((
775 TRI_A
776 Status
777 )))|(((
778 TRI_DI
779 FLAG+STA
780 )))|Reserve|Enable/Disable MOD6|(((
781 MOD
782 (6)
783 )))
784
785
786 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
787
788 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
789 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
790 |(((
791 AV1_
792 LOW
793 )))|(((
794 AV1_
795 HIGH
796 )))|(((
797 AV2_
798 LOW
799 )))|(((
800 AV2_
801 HIGH
802 )))|(((
803 AC1_
804 LOW
805 )))|(((
806 AC1_
807 HIGH
808 )))|(((
809 AC2_
810 LOW
811 )))|(((
812 AC2_
813 HIGH
814 )))
815
816 * Each bits shows if the corresponding trigger has been configured.
817
818 **Example:**
819
820 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
821
822
823 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
824
825 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
826 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
827 |(((
828 AV1_
829 LOW
830 )))|(((
831 AV1_
832 HIGH
833 )))|(((
834 AV2_
835 LOW
836 )))|(((
837 AV2_
838 HIGH
839 )))|(((
840 AC1_
841 LOW
842 )))|(((
843 AC1_
844 HIGH
845 )))|(((
846 AC2_
847 LOW
848 )))|(((
849 AC2_
850 HIGH
851 )))
852
853 * Each bits shows which status has been trigger on this uplink.
854
855 **Example:**
856
857 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
858
859
860 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
861
862 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
863 |**bit7**|**bit6**|**bit5**|**bit4**|**bit3**|**bit2**|**bit1**|**bit0**
864 |N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
865
866 * Each bits shows which status has been trigger on this uplink.
867
868 **Example:**
869
870 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
871
872 00000101: Means both DI1 and DI2 trigger are enabled.
873
874
875 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
876
877 Downlink command to poll MOD6 status:
878
879 **AB 06**
880
881 When device got this command, it will send the MOD6 payload.
882
883
884 === 3.3.7 Payload Decoder ===
885
886 (((
887
888
889 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
890 )))
891
892
893 == 3.4 ​Configure LT via AT or Downlink ==
894
895
896 (((
897 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
898 )))
899
900 (((
901 (((
902 There are two kinds of Commands:
903 )))
904 )))
905
906 * (% 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]]
907
908 * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
909
910
911
912 === 3.4.1 Common Commands ===
913
914
915 (((
916 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]]
917 )))
918
919
920 === 3.4.2 Sensor related commands ===
921
922 ==== 3.4.2.1 Set Transmit Interval ====
923
924
925 Set device uplink interval.
926
927 * (% style="color:#037691" %)**AT Command:**
928
929 (% style="color:blue" %)**AT+TDC=N **
930
931
932 **Example: **AT+TDC=30000. Means set interval to 30 seconds
933
934
935 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
936
937 (% style="color:blue" %)**0x01 aa bb cc  **(%%)** ~/~/ Same as AT+TDC=0x(aa bb cc)**
938
939
940
941 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
942
943
944 Set work mode.
945
946 * (% style="color:#037691" %)**AT Command:**
947
948 (% style="color:blue" %)**AT+MOD=N  **
949
950
951 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
952
953
954 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
955
956 (% style="color:blue" %)**0x0A aa  **(%%)** ** ~/~/ Same as AT+MOD=aa
957
958
959
960 ==== 3.4.2.3 Poll an uplink ====
961
962
963 * (% style="color:#037691" %)**AT Command:**
964
965 There is no AT Command to poll uplink
966
967
968 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
969
970 (% style="color:blue" %)**0x08 FF  **(%%)** **~/~/ Poll an uplink
971
972
973 **Example**: 0x08FF, ask device to send an Uplink
974
975
976
977 ==== 3.4.2.4 Enable Trigger Mode ====
978
979
980 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
981
982 * (% style="color:#037691" %)**AT Command:**
983
984 (% style="color:blue" %)**AT+ADDMOD6=1 or 0**
985
986 (% style="color:red" %)**1:** (%%)Enable Trigger Mode
987
988 (% style="color:red" %)**0: **(%%)Disable Trigger Mode
989
990
991 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
992
993 (% style="color:blue" %)**0x0A 06 aa    **(%%) ~/~/ Same as AT+ADDMOD6=aa
994
995
996
997 ==== 3.4.2.5 Poll trigger settings ====
998
999
1000 Poll trigger settings,
1001
1002 * (% style="color:#037691" %)**AT Command:**
1003
1004 There is no AT Command for this feature.
1005
1006
1007 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
1008
1009 (% style="color:blue" %)**0xAB 06  ** (%%) ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
1010
1011
1012
1013 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
1014
1015
1016 Enable Disable DI1/DI2/DI2 as trigger,
1017
1018 * (% style="color:#037691" %)**AT Command:**
1019
1020 (% style="color:blue" %)**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
1021
1022
1023 **Example:**
1024
1025 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
1026
1027 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
1028
1029 (% style="color:blue" %)**0xAA 02 aa bb   ** (%%) ~/~/ Same as AT+DTRI=aa,bb
1030
1031
1032
1033 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
1034
1035
1036 Set DI1 or DI3(for LT-33222-L) trigger.
1037
1038 * (% style="color:#037691" %)**AT Command:**
1039
1040 (% style="color:blue" %)**AT+TRIG1=a,b**
1041
1042 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
1043
1044 (% style="color:red" %)**b :** (%%)delay timing.
1045
1046
1047 **Example:**
1048
1049 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
1050
1051
1052 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
1053
1054 (% style="color:blue" %)**0x09 01 aa bb cc    ** (%%) ~/~/ same as AT+TRIG1=aa,0x(bb cc)
1055
1056
1057
1058 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
1059
1060
1061 Set DI2 trigger.
1062
1063 * (% style="color:#037691" %)**AT Command:**
1064
1065 (% style="color:blue" %)**AT+TRIG2=a,b**
1066
1067 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
1068
1069 (% style="color:red" %)**b :** (%%)delay timing.
1070
1071
1072 **Example:**
1073
1074 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
1075
1076
1077 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
1078
1079 (% style="color:blue" %)**0x09 02 aa bb cc   ** (%%)~/~/ same as AT+TRIG2=aa,0x(bb cc)
1080
1081
1082
1083 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
1084
1085
1086 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1087
1088 * (% style="color:#037691" %)**AT Command**
1089
1090 (% style="color:blue" %)**AT+ACLIM**
1091
1092
1093 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
1094
1095 (% 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"]]
1096
1097
1098
1099 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1100
1101
1102 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1103
1104 * (% style="color:#037691" %)**AT Command**
1105
1106 (% style="color:blue" %)**AT+AVLIM    **(%%)** See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1107
1108
1109 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
1110
1111 (% 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"]]
1112
1113
1114
1115 ==== 3.4.2.11 Trigger – Set minimum interval ====
1116
1117
1118 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
1119
1120 * (% style="color:#037691" %)**AT Command**
1121
1122 (% style="color:blue" %)**AT+ATDC=5        ** (%%)Device won't response the second trigger within 5 minute after the first trigger.
1123
1124
1125 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
1126
1127 (% style="color:blue" %)**0x AC aa bb   **(%%) ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
1128
1129 (((
1130
1131
1132 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
1133 )))
1134
1135
1136
1137 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1138
1139
1140 * (% style="color:#037691" %)**AT Command**
1141
1142 There is no AT Command to control Digital Output
1143
1144
1145 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1146 * (% style="color:blue" %)**0x02 aa bb cc     ** (%%)~/~/ Set DO1/DO2/DO3 output
1147
1148 (((
1149 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1150 )))
1151
1152 (((
1153 01: Low,  00: High ,  11: No action
1154
1155 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1156 |(% 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**
1157 |02  01  00  11|Low|High|No Action
1158 |02  00  11  01|High|No Action|Low
1159 |02  11  01  00|No Action|Low|High
1160 )))
1161
1162
1163 (((
1164 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1165 )))
1166
1167 (((
1168 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1169 )))
1170
1171
1172
1173 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1174
1175
1176 * (% style="color:#037691" %)**AT Command**
1177
1178 There is no AT Command to control Digital Output
1179
1180
1181 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1182
1183 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1184
1185
1186 This is to control the digital output time of DO pin. Include four bytes:
1187
1188 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1189
1190 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1191
1192 01: DO pins will change back to original state after timeout.
1193
1194 00: DO pins will change to an inverter state after timeout 
1195
1196
1197 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1198
1199 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1200 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1201 |0x01|DO1 set to low
1202 |0x00|DO1 set to high
1203 |0x11|DO1 NO Action
1204
1205 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1206
1207 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1208 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1209 |0x01|DO2 set to low
1210 |0x00|DO2 set to high
1211 |0x11|DO2 NO Action
1212
1213 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1214
1215 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1216 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1217 |0x01|DO3 set to low
1218 |0x00|DO3 set to high
1219 |0x11|DO3 NO Action
1220
1221 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:(%%) Latching time. Unit: ms
1222
1223
1224 (% style="color:red" %)**Note: **
1225
1226 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1227
1228 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1229
1230
1231 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1232
1233
1234 **Example payload:**
1235
1236 **~1. A9 01 01 01 01 07 D0**
1237
1238 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1239
1240 **2. A9 01 00 01 11 07 D0**
1241
1242 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1243
1244 **3. A9 00 00 00 00 07 D0**
1245
1246 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1247
1248 **4. A9 00 11 01 00 07 D0**
1249
1250 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
1251
1252
1253
1254 ==== 3.4.2. 14 Relay ~-~- Control Relay Output RO1/RO2 ====
1255
1256
1257 * (% style="color:#037691" %)**AT Command:**
1258
1259 There is no AT Command to control Relay Output
1260
1261
1262 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1263
1264 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1265
1266
1267 (((
1268 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1269 )))
1270
1271 (((
1272 01: Close ,  00: Open , 11: No action
1273
1274 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1275 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO2**
1276 |03  00  11|Open|No Action
1277 |03  01  11|Close|No Action
1278 |03  11  00|No Action|Open
1279 |03  11  01|No Action|Close
1280 |03  00  00|Open|Open
1281 |03  01  01|Close|Close
1282 |03  01  00|Close|Open
1283 |03  00  01|Open|Close
1284 )))
1285
1286 (((
1287
1288 )))
1289
1290 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1291
1292
1293
1294 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1295
1296
1297 * (% style="color:#037691" %)**AT Command:**
1298
1299 There is no AT Command to control Relay Output
1300
1301
1302 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1303
1304 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1305
1306
1307 This is to control the relay output time of relay. Include four bytes:
1308
1309 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1310
1311 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1312
1313 01: Relays will change back to original state after timeout.
1314
1315 00: Relays will change to an inverter state after timeout
1316
1317
1318 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1319
1320 [[image:image-20221008095908-1.png||height="364" width="564"]]
1321
1322
1323 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1324
1325
1326 (% style="color:red" %)**Note:**
1327
1328 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1329
1330 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1331
1332
1333 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1334
1335
1336 **Example payload:**
1337
1338 **~1. 05 01 11 07 D0**
1339
1340 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1341
1342 **2. 05 01 10 07 D0**
1343
1344 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1345
1346 **3. 05 00 01 07 D0**
1347
1348 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1349
1350 **4. 05 00 00 07 D0**
1351
1352 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1353
1354
1355
1356 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1357
1358
1359 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1360
1361 * (% style="color:#037691" %)**AT Command:**
1362
1363 (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1364
1365
1366 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1367
1368 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1369
1370
1371
1372 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1373
1374
1375 * (% style="color:#037691" %)**AT Command:**
1376
1377 (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1378
1379 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1380
1381 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1382
1383
1384 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1385
1386 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1387
1388
1389
1390 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1391
1392
1393 Clear counting for counting mode
1394
1395 * (% style="color:#037691" %)**AT Command:**
1396
1397 (% style="color:blue" %)**AT+CLRCOUNT **(%%) ~/~/ clear all counting
1398
1399
1400 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1401
1402 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1403
1404
1405
1406 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1407
1408
1409 * (% style="color:#037691" %)**AT Command:**
1410
1411 (% 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)
1412
1413
1414 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1415
1416 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1417
1418 (((
1419 range: aa bb cc:0 to 16777215,  (unit:second)
1420 )))
1421
1422
1423
1424 ==== 3.4.2.20 Reset save RO DO state ====
1425
1426
1427 * (% style="color:#037691" %)**AT Command:**
1428
1429 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1430
1431 (% 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.
1432
1433
1434 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1435
1436 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1437
1438
1439
1440 ==== 3.4.2.21 Encrypted payload ====
1441
1442
1443 * (% style="color:#037691" %)**AT Command:**
1444
1445 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1446
1447 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1448
1449
1450
1451 ==== 3.4.2.22 Get sensor value ====
1452
1453
1454 * (% style="color:#037691" %)**AT Command:**
1455
1456 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1457
1458 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1459
1460
1461
1462 ==== 3.4.2.23 Resets the downlink packet count ====
1463
1464
1465 * (% style="color:#037691" %)**AT Command:**
1466
1467 (% 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)
1468
1469 (% 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.
1470
1471
1472
1473 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1474
1475
1476 * (% style="color:#037691" %)**AT Command:**
1477
1478 (% 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)
1479
1480 (% 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.
1481
1482
1483 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1484
1485 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1486
1487
1488
1489 ==== 3.4.2.25 Copy downlink to uplink ====
1490
1491
1492 * (% style="color:#037691" %)**AT Command**(%%)**:**
1493
1494 (% 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.
1495
1496 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.
1497
1498
1499 [[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"]]
1500
1501 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1502
1503
1504
1505 [[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"]]
1506
1507 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1508
1509
1510
1511 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1512
1513
1514 * (((
1515 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1516
1517 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1518
1519
1520 )))
1521
1522 **Example：**
1523
1524 [[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"]]
1525
1526
1527 == 3.5 Integrate with Mydevice ==
1528
1529
1530 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:
1531
1532 (((
1533 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1534 )))
1535
1536 (((
1537 (% 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:
1538
1539
1540 )))
1541
1542 [[image:image-20220719105525-1.png||height="377" width="677"]]
1543
1544
1545
1546 [[image:image-20220719110247-2.png||height="388" width="683"]]
1547
1548
1549 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1550
1551 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L) and add DevEUI.(% style="display:none" %)
1552
1553 Search under The things network
1554
1555 [[image:1653356838789-523.png||height="337" width="740"]]
1556
1557
1558
1559 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1560
1561 [[image:image-20220524094909-1.png||height="335" width="729"]]
1562
1563
1564 [[image:image-20220524094909-2.png||height="337" width="729"]]
1565
1566
1567 [[image:image-20220524094909-3.png||height="338" width="727"]]
1568
1569
1570 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1571
1572
1573 [[image:image-20220524094909-5.png||height="341" width="734"]]
1574
1575
1576 == 3.6 Interface Detail ==
1577
1578 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1579
1580
1581 Support NPN Type sensor
1582
1583 [[image:1653356991268-289.png]]
1584
1585
1586 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1587
1588
1589 (((
1590 The DI port of LT-22222-L can support NPN or PNP output sensor.
1591 )))
1592
1593 (((
1594 (((
1595 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.
1596
1597
1598 )))
1599 )))
1600
1601 [[image:1653357170703-587.png]]
1602
1603 (((
1604 (((
1605 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1606 )))
1607 )))
1608
1609 (((
1610
1611 )))
1612
1613 (((
1614 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1615 )))
1616
1617 (((
1618 This type of sensor will output a low signal GND when active.
1619 )))
1620
1621 * (((
1622 Connect sensor's output to DI1-
1623 )))
1624 * (((
1625 Connect sensor's VCC to DI1+.
1626 )))
1627
1628 (((
1629 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1630 )))
1631
1632 (((
1633 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1634 )))
1635
1636 (((
1637 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.
1638 )))
1639
1640 (((
1641
1642 )))
1643
1644 (((
1645 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1646 )))
1647
1648 (((
1649 This type of sensor will output a high signal (example 24v) when active.
1650 )))
1651
1652 * (((
1653 Connect sensor's output to DI1+
1654 )))
1655 * (((
1656 Connect sensor's GND DI1-.
1657 )))
1658
1659 (((
1660 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1661 )))
1662
1663 (((
1664 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1665 )))
1666
1667 (((
1668 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.
1669 )))
1670
1671 (((
1672
1673 )))
1674
1675 (((
1676 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1677 )))
1678
1679 (((
1680 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1681 )))
1682
1683 * (((
1684 Connect sensor's output to DI1+ with a serial 50K resistor
1685 )))
1686 * (((
1687 Connect sensor's GND DI1-.
1688 )))
1689
1690 (((
1691 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1692 )))
1693
1694 (((
1695 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1696 )))
1697
1698 (((
1699 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.
1700 )))
1701
1702
1703 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1704
1705
1706 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1707
1708 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1709
1710 [[image:1653357531600-905.png]]
1711
1712
1713 === 3.6.4 Analog Input Interface ===
1714
1715
1716 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:
1717
1718
1719 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1720
1721 [[image:1653357592296-182.png]]
1722
1723 Example to connect a 4~~20mA sensor
1724
1725 We take the wind speed sensor as an example for reference only.
1726
1727
1728 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1729
1730 (% style="color:red" %)**Red:  12~~24v**
1731
1732 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1733
1734 **Black:  GND**
1735
1736
1737 **Connection diagram:**
1738
1739 [[image:1653357640609-758.png]]
1740
1741 [[image:1653357648330-671.png||height="155" width="733"]]
1742
1743
1744 === 3.6.5 Relay Output ===
1745
1746
1747 (((
1748 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:
1749
1750 **Note**: RO pins go to Open(NO) when device is power off.
1751 )))
1752
1753 [[image:image-20220524100215-9.png]]
1754
1755
1756 [[image:image-20220524100215-10.png||height="382" width="723"]]
1757
1758
1759 == 3.7 LEDs Indicators ==
1760
1761
1762 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1763 |(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**LEDs**|(% style="background-color:#d9e2f3; color:#0070c0; width:470px" %)**Feature**
1764 |**PWR**|Always on if there is power
1765 |**SYS**|(((
1766 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.
1767 )))
1768 |**TX**|(((
1769 (((
1770 Device boot: TX blinks 5 times.
1771 )))
1772
1773 (((
1774 Successful join network: TX ON for 5 seconds.
1775 )))
1776
1777 (((
1778 Transmit a LoRa packet: TX blinks once
1779 )))
1780 )))
1781 |**RX**|RX blinks once when receive a packet.
1782 |**DO1**|
1783 |**DO2**|
1784 |**DO3**|
1785 |**DI2**|(((
1786 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1787 )))
1788 |**DI2**|(((
1789 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1790 )))
1791 |**DI2**|(((
1792 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1793 )))
1794 |**RO1**|
1795 |**RO2**|
1796
1797
1798
1799 = 4. Use AT Command =
1800
1801 == 4.1 Access AT Command ==
1802
1803
1804 (((
1805 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.
1806 )))
1807
1808 (((
1809
1810 )))
1811
1812 [[image:1653358238933-385.png]]
1813
1814
1815 (((
1816 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:
1817 )))
1818
1819 [[image:1653358355238-883.png]]
1820
1821
1822 (((
1823 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/]]
1824 )))
1825
1826 (((
1827 AT+<CMD>?        : Help on <CMD>
1828 )))
1829
1830 (((
1831 AT+<CMD>         : Run <CMD>
1832 )))
1833
1834 (((
1835 AT+<CMD>=<value> : Set the value
1836 )))
1837
1838 (((
1839 AT+<CMD>=?       :  Get the value
1840 )))
1841
1842 (((
1843 ATZ: Trig a reset of the MCU
1844 )))
1845
1846 (((
1847 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1848 )))
1849
1850 (((
1851 AT+DEUI: Get or Set the Device EUI
1852 )))
1853
1854 (((
1855 AT+DADDR: Get or Set the Device Address
1856 )))
1857
1858 (((
1859 AT+APPKEY: Get or Set the Application Key
1860 )))
1861
1862 (((
1863 AT+NWKSKEY: Get or Set the Network Session Key
1864 )))
1865
1866 (((
1867 AT+APPSKEY:  Get or Set the Application Session Key
1868 )))
1869
1870 (((
1871 AT+APPEUI:  Get or Set the Application EUI
1872 )))
1873
1874 (((
1875 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1876 )))
1877
1878 (((
1879 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1880 )))
1881
1882 (((
1883 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1884 )))
1885
1886 (((
1887 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1888 )))
1889
1890 (((
1891 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1892 )))
1893
1894 (((
1895 AT+RX2FQ: Get or Set the Rx2 window frequency
1896 )))
1897
1898 (((
1899 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1900 )))
1901
1902 (((
1903 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1904 )))
1905
1906 (((
1907 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1908 )))
1909
1910 (((
1911 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1912 )))
1913
1914 (((
1915 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1916 )))
1917
1918 (((
1919 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1920 )))
1921
1922 (((
1923 AT+NWKID: Get or Set the Network ID
1924 )))
1925
1926 (((
1927 AT+FCU: Get or Set the Frame Counter Uplink
1928 )))
1929
1930 (((
1931 AT+FCD: Get or Set the Frame Counter Downlink
1932 )))
1933
1934 (((
1935 AT+CLASS: Get or Set the Device Class
1936 )))
1937
1938 (((
1939 AT+JOIN: Join network
1940 )))
1941
1942 (((
1943 AT+NJS: Get OTAA Join Status
1944 )))
1945
1946 (((
1947 AT+SENDB: Send hexadecimal data along with the application port
1948 )))
1949
1950 (((
1951 AT+SEND: Send text data along with the application port
1952 )))
1953
1954 (((
1955 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1956 )))
1957
1958 (((
1959 AT+RECV: Print last received data in raw format
1960 )))
1961
1962 (((
1963 AT+VER:  Get current image version and Frequency Band
1964 )))
1965
1966 (((
1967 AT+CFM: Get or Set the confirmation mode (0-1)
1968 )))
1969
1970 (((
1971 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1972 )))
1973
1974 (((
1975 AT+SNR: Get the SNR of the last received packet
1976 )))
1977
1978 (((
1979 AT+RSSI: Get the RSSI of the last received packet
1980 )))
1981
1982 (((
1983 AT+TDC: Get or set the application data transmission interval in ms
1984 )))
1985
1986 (((
1987 AT+PORT: Get or set the application port
1988 )))
1989
1990 (((
1991 AT+DISAT: Disable AT commands
1992 )))
1993
1994 (((
1995 AT+PWORD: Set password, max 9 digits
1996 )))
1997
1998 (((
1999 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
2000 )))
2001
2002 (((
2003 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
2004 )))
2005
2006 (((
2007 AT+CFG: Print all settings
2008 )))
2009
2010
2011 == 4.2 Common AT Command Sequence ==
2012
2013 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
2014
2015 (((
2016
2017
2018 (((
2019 (% style="color:blue" %)**If device has not joined network yet:**
2020 )))
2021 )))
2022
2023 (((
2024 (% style="background-color:#dcdcdc" %)**123456**
2025 )))
2026
2027 (((
2028 (% style="background-color:#dcdcdc" %)**AT+FDR**
2029 )))
2030
2031 (((
2032 (% style="background-color:#dcdcdc" %)**123456**
2033 )))
2034
2035 (((
2036 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
2037 )))
2038
2039 (((
2040 (% style="background-color:#dcdcdc" %)**ATZ**
2041 )))
2042
2043
2044 (((
2045 (% style="color:blue" %)**If device already joined network:**
2046 )))
2047
2048 (((
2049 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
2050 )))
2051
2052 (((
2053 (% style="background-color:#dcdcdc" %)**ATZ**
2054 )))
2055
2056
2057 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
2058
2059 (((
2060
2061
2062 (((
2063 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
2064 )))
2065 )))
2066
2067 (((
2068 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
2069 )))
2070
2071 (((
2072 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
2073 )))
2074
2075 (((
2076 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
2077 )))
2078
2079 (((
2080 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
2081 )))
2082
2083 (((
2084 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
2085 )))
2086
2087 (((
2088 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
2089 )))
2090
2091 (((
2092 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
2093 )))
2094
2095 (((
2096 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
2097 )))
2098
2099 (((
2100 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
2101 )))
2102
2103 (((
2104 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
2105 )))
2106
2107 (((
2108 (% 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.
2109 )))
2110
2111 (((
2112 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2113
2114
2115 )))
2116
2117 (((
2118 (% style="color:red" %)**Note:**
2119 )))
2120
2121 (((
2122 **~1. Make sure the device is set to ABP mode in the IoT Server.**
2123
2124 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
2125
2126 **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?
2127 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2128
2129 **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.**
2130
2131
2132 )))
2133
2134 (((
2135 [[image:1653359097980-169.png||height="188" width="729"]]
2136 )))
2137
2138 (((
2139
2140 )))
2141
2142 === 4.2.3 Change to Class A ===
2143
2144
2145 (((
2146 (% style="color:blue" %)**If sensor JOINED:**
2147
2148 (% style="background-color:#dcdcdc" %)**AT+CLASS=A
2149 ATZ**
2150 )))
2151
2152
2153 = 5. Case Study =
2154
2155 == 5.1 Counting how many objects pass in Flow Line ==
2156
2157
2158 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
2159
2160
2161 = 6. FAQ =
2162
2163 == 6.1 How to upgrade the image? ==
2164
2165
2166 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2167
2168 * Support new features
2169 * For bug fix
2170 * Change LoRaWAN bands.
2171
2172 Below shows the hardware connection for how to upload an image to the LT:
2173
2174 [[image:1653359603330-121.png]]
2175
2176
2177 (((
2178 (% 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]].
2179 (% 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]].
2180 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2181
2182
2183 (((
2184 (% style="color:blue" %)**For LT-22222-L**(%%):
2185 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.
2186 )))
2187
2188
2189 )))
2190
2191 [[image:image-20220524103407-12.png]]
2192
2193
2194 [[image:image-20220524103429-13.png]]
2195
2196
2197 [[image:image-20220524104033-15.png]]
2198
2199
2200 (% 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:
2201
2202
2203 [[image:1653360054704-518.png||height="186" width="745"]]
2204
2205
2206 (((
2207 (((
2208 == 6.2 How to change the LoRa Frequency Bands/Region? ==
2209
2210
2211 )))
2212 )))
2213
2214 (((
2215 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2216 )))
2217
2218 (((
2219
2220
2221 == 6.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2222
2223
2224 )))
2225
2226 (((
2227 (((
2228 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2229 )))
2230 )))
2231
2232 (((
2233 (((
2234 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2235
2236
2237 )))
2238 )))
2239
2240 (((
2241 (% 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.
2242
2243
2244 )))
2245
2246 (((
2247 [[image:1653360231087-571.png||height="401" width="727"]]
2248
2249
2250 )))
2251
2252 (((
2253 (% 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.**
2254 )))
2255
2256
2257
2258 (((
2259 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2260
2261
2262 )))
2263
2264 (((
2265 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2266 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2267 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2268 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2269 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2270 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2271 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2272 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2273 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2274 )))
2275
2276
2277 (((
2278 As shown in below:
2279 )))
2280
2281 [[image:1653360498588-932.png||height="485" width="726"]]
2282
2283
2284 == 6.4 How to change the uplink interval？ ==
2285
2286
2287 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/]]
2288
2289
2290 == 6.5 Can I see counting event in Serial? ==
2291
2292
2293 (((
2294 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.
2295
2296
2297 == 6.6 Can i use point to point communication for LT-22222-L? ==
2298
2299
2300 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]].
2301
2302
2303 )))
2304
2305 (((
2306 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2307
2308
2309 If the device is not shut down, but directly powered off.
2310
2311 It will default that this is a power-off state.
2312
2313 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2314
2315 After restart, the status before power failure will be read from flash.
2316
2317
2318 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2319
2320
2321 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2322
2323
2324 [[image:image-20221006170630-1.png||height="610" width="945"]]
2325
2326
2327 == 6.9 Can LT22222-L save RO state? ==
2328
2329
2330 Firmware version needs to be no less than 1.6.0.
2331
2332
2333 = 7. Trouble Shooting =
2334 )))
2335
2336 (((
2337 (((
2338 == 7.1 Downlink doesn't work, how to solve it? ==
2339
2340
2341 )))
2342 )))
2343
2344 (((
2345 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2346 )))
2347
2348 (((
2349
2350
2351 == 7.2 Have trouble to upload image. ==
2352
2353
2354 )))
2355
2356 (((
2357 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2358 )))
2359
2360 (((
2361
2362
2363 == 7.3 Why I can't join TTN in US915 /AU915 bands? ==
2364
2365
2366 )))
2367
2368 (((
2369 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2370 )))
2371
2372
2373 = 8. Order Info =
2374
2375
2376 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2377
2378 (% style="color:#4f81bd" %)**XXX:**
2379
2380 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2381 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2382 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2383 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2384 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2385 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2386 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2387 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2388 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2389
2390
2391
2392 = 9. Packing Info =
2393
2394
2395 **Package Includes**:
2396
2397 * LT-22222-L I/O Controller x 1
2398 * Stick Antenna for LoRa RF part x 1
2399 * Bracket for controller x1
2400 * Program cable x 1
2401
2402 **Dimension and weight**:
2403
2404 * Device Size: 13.5 x 7 x 3 cm
2405 * Device Weight: 105g
2406 * Package Size / pcs : 14.5 x 8 x 5 cm
2407 * Weight / pcs : 170g
2408
2409
2410
2411 = 10. Support =
2412
2413
2414 * (((
2415 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.
2416 )))
2417 * (((
2418 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]]
2419
2420
2421
2422 )))
2423
2424 = 11. Reference​​​​​ =
2425
2426
2427 * 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]]
2428 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2429 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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