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Version 118.14 by Xiaoling on 2023/05/17 11:39
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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
1206 (% style="color:#4f81bd" %)**Fourth 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|DO2 set to low
1211 |0x00|DO2 set to high
1212 |0x11|DO2 NO Action
1213
1214
1215 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1216
1217 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:300px" %)
1218 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Second Byte**|(% style="background-color:#d9e2f3; color:#0070c0" %)**Status**
1219 |0x01|DO3 set to low
1220 |0x00|DO3 set to high
1221 |0x11|DO3 NO Action
1222
1223
1224 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:
1225
1226 Latching time. Unit: ms
1227
1228
1229 (% style="color:red" %)**Note: **
1230
1231 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1232
1233 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1234
1235
1236 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1237
1238
1239 **Example payload:**
1240
1241 **~1. A9 01 01 01 01 07 D0**
1242
1243 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1244
1245 **2. A9 01 00 01 11 07 D0**
1246
1247 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1248
1249 **3. A9 00 00 00 00 07 D0**
1250
1251 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1252
1253 **4. A9 00 11 01 00 07 D0**
1254
1255 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
1256
1257
1258
1259 ==== 3.4.2. 14 Relay ~-~- Control Relay Output RO1/RO2 ====
1260
1261
1262 * (% style="color:#037691" %)**AT Command:**
1263
1264 There is no AT Command to control Relay Output
1265
1266
1267 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1268
1269 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1270
1271
1272 (((
1273 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1274 )))
1275
1276 (((
1277 01: Close ,  00: Open , 11: No action
1278
1279 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:320px" %)
1280 |(% style="background-color:#d9e2f3; color:#0070c0" %)**Downlink Code**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO1**|(% style="background-color:#d9e2f3; color:#0070c0" %)**RO2**
1281 |03  00  11|Open|No Action
1282 |03  01  11|Close|No Action
1283 |03  11  00|No Action|Open
1284 |03  11  01|No Action|Close
1285 |03  00  00|Open|Open
1286 |03  01  01|Close|Close
1287 |03  01  00|Close|Open
1288 |03  00  01|Open|Close
1289 )))
1290
1291 (((
1292
1293 )))
1294
1295 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1296
1297
1298
1299 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1300
1301
1302 * (% style="color:#037691" %)**AT Command:**
1303
1304 There is no AT Command to control Relay Output
1305
1306
1307 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1308
1309 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1310
1311
1312 This is to control the relay output time of relay. Include four bytes:
1313
1314 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1315
1316 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1317
1318 01: Relays will change back to original state after timeout.
1319
1320 00: Relays will change to an inverter state after timeout
1321
1322
1323 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1324
1325 [[image:image-20221008095908-1.png||height="364" width="564"]]
1326
1327
1328 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1329
1330
1331 (% style="color:red" %)**Note:**
1332
1333 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1334
1335 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1336
1337
1338 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1339
1340
1341 **Example payload:**
1342
1343 **~1. 05 01 11 07 D0**
1344
1345 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1346
1347 **2. 05 01 10 07 D0**
1348
1349 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1350
1351 **3. 05 00 01 07 D0**
1352
1353 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1354
1355 **4. 05 00 00 07 D0**
1356
1357 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1358
1359
1360
1361 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1362
1363
1364 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1365
1366 * (% style="color:#037691" %)**AT Command:**
1367
1368 (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1369
1370
1371 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1372
1373 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1374
1375
1376
1377 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1378
1379
1380 * (% style="color:#037691" %)**AT Command:**
1381
1382 (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1383
1384 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1385
1386 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1387
1388
1389 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1390
1391 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1392
1393
1394
1395 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1396
1397
1398 Clear counting for counting mode
1399
1400 * (% style="color:#037691" %)**AT Command:**
1401
1402 (% style="color:blue" %)**AT+CLRCOUNT **(%%) ~/~/ clear all counting
1403
1404
1405 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1406
1407 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1408
1409
1410
1411 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1412
1413
1414 * (% style="color:#037691" %)**AT Command:**
1415
1416 (% 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)
1417
1418
1419 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1420
1421 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1422
1423 (((
1424 range: aa bb cc:0 to 16777215,  (unit:second)
1425 )))
1426
1427
1428
1429 ==== 3.4.2.20 Reset save RO DO state ====
1430
1431
1432 * (% style="color:#037691" %)**AT Command:**
1433
1434 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1435
1436 (% 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.
1437
1438
1439 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1440
1441 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1442
1443
1444
1445 ==== 3.4.2.21 Encrypted payload ====
1446
1447
1448 * (% style="color:#037691" %)**AT Command:**
1449
1450 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1451
1452 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1453
1454
1455
1456 ==== 3.4.2.22 Get sensor value ====
1457
1458
1459 * (% style="color:#037691" %)**AT Command:**
1460
1461 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1462
1463 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1464
1465
1466
1467 ==== 3.4.2.23 Resets the downlink packet count ====
1468
1469
1470 * (% style="color:#037691" %)**AT Command:**
1471
1472 (% 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)
1473
1474 (% 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.
1475
1476
1477
1478 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1479
1480
1481 * (% style="color:#037691" %)**AT Command:**
1482
1483 (% 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)
1484
1485 (% 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.
1486
1487
1488 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1489
1490 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1491
1492
1493
1494 ==== 3.4.2.25 Copy downlink to uplink ====
1495
1496
1497 * (% style="color:#037691" %)**AT Command**(%%)**:**
1498
1499 (% 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.
1500
1501 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.
1502
1503
1504 [[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"]]
1505
1506 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1507
1508
1509
1510 [[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"]]
1511
1512 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1513
1514
1515
1516 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1517
1518
1519 * (((
1520 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1521
1522 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1523
1524
1525 )))
1526
1527 **Example：**
1528
1529 [[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"]]
1530
1531
1532 == 3.5 Integrate with Mydevice ==
1533
1534
1535 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:
1536
1537 (((
1538 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1539 )))
1540
1541 (((
1542 (% 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:
1543
1544
1545 )))
1546
1547 [[image:image-20220719105525-1.png||height="377" width="677"]]
1548
1549
1550
1551 [[image:image-20220719110247-2.png||height="388" width="683"]]
1552
1553
1554 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1555
1556 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1557
1558 Search under The things network
1559
1560 [[image:1653356838789-523.png||height="337" width="740"]]
1561
1562
1563
1564 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1565
1566 [[image:image-20220524094909-1.png||height="335" width="729"]]
1567
1568
1569 [[image:image-20220524094909-2.png||height="337" width="729"]]
1570
1571
1572 [[image:image-20220524094909-3.png||height="338" width="727"]]
1573
1574
1575 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1576
1577
1578 [[image:image-20220524094909-5.png||height="341" width="734"]]
1579
1580
1581 == 3.6 Interface Detail ==
1582
1583 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1584
1585
1586 Support NPN Type sensor
1587
1588 [[image:1653356991268-289.png]]
1589
1590
1591 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1592
1593
1594 (((
1595 The DI port of LT-22222-L can support NPN or PNP output sensor.
1596 )))
1597
1598 (((
1599 (((
1600 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.
1601
1602
1603 )))
1604 )))
1605
1606 [[image:1653357170703-587.png]]
1607
1608 (((
1609 (((
1610 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1611 )))
1612 )))
1613
1614 (((
1615
1616 )))
1617
1618 (((
1619 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1620 )))
1621
1622 (((
1623 This type of sensor will output a low signal GND when active.
1624 )))
1625
1626 * (((
1627 Connect sensor's output to DI1-
1628 )))
1629 * (((
1630 Connect sensor's VCC to DI1+.
1631 )))
1632
1633 (((
1634 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1635 )))
1636
1637 (((
1638 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1639 )))
1640
1641 (((
1642 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.
1643 )))
1644
1645 (((
1646
1647 )))
1648
1649 (((
1650 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1651 )))
1652
1653 (((
1654 This type of sensor will output a high signal (example 24v) when active.
1655 )))
1656
1657 * (((
1658 Connect sensor's output to DI1+
1659 )))
1660 * (((
1661 Connect sensor's GND DI1-.
1662 )))
1663
1664 (((
1665 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1666 )))
1667
1668 (((
1669 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1670 )))
1671
1672 (((
1673 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.
1674 )))
1675
1676 (((
1677
1678 )))
1679
1680 (((
1681 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1682 )))
1683
1684 (((
1685 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1686 )))
1687
1688 * (((
1689 Connect sensor's output to DI1+ with a serial 50K resistor
1690 )))
1691 * (((
1692 Connect sensor's GND DI1-.
1693 )))
1694
1695 (((
1696 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1697 )))
1698
1699 (((
1700 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1701 )))
1702
1703 (((
1704 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.
1705 )))
1706
1707
1708 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1709
1710
1711 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1712
1713 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1714
1715 [[image:1653357531600-905.png]]
1716
1717
1718 === 3.6.4 Analog Input Interface ===
1719
1720
1721 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:
1722
1723
1724 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1725
1726 [[image:1653357592296-182.png]]
1727
1728 Example to connect a 4~~20mA sensor
1729
1730 We take the wind speed sensor as an example for reference only.
1731
1732
1733 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1734
1735 (% style="color:red" %)**Red:  12~~24v**
1736
1737 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1738
1739 **Black:  GND**
1740
1741
1742 **Connection diagram:**
1743
1744 [[image:1653357640609-758.png]]
1745
1746 [[image:1653357648330-671.png||height="155" width="733"]]
1747
1748
1749 === 3.6.5 Relay Output ===
1750
1751
1752 (((
1753 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:
1754
1755 **Note**: RO pins go to Open(NO) when device is power off.
1756 )))
1757
1758 [[image:image-20220524100215-9.png]]
1759
1760
1761 [[image:image-20220524100215-10.png||height="382" width="723"]]
1762
1763
1764 == 3.7 LEDs Indicators ==
1765
1766
1767 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
1768 |(% style="background-color:#d9e2f3; color:#0070c0;width:50px" %)**LEDs**|(% style="background-color:#d9e2f3; color:#0070c0;width:470px" %)**Feature**
1769 |**PWR**|Always on if there is power
1770 |**SYS**|(((
1771 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.
1772 )))
1773 |**TX**|(((
1774 (((
1775 Device boot: TX blinks 5 times.
1776 )))
1777
1778 (((
1779 Successful join network: TX ON for 5 seconds.
1780 )))
1781
1782 (((
1783 Transmit a LoRa packet: TX blinks once
1784 )))
1785 )))
1786 |**RX**|RX blinks once when receive a packet.
1787 |**DO1**|
1788 |**DO2**|
1789 |**DO3**|
1790 |**DI2**|(((
1791 For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1792 )))
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 |**RO1**|
1800 |**RO2**|
1801
1802
1803
1804
1805 = 4. Use AT Command =
1806
1807 == 4.1 Access AT Command ==
1808
1809
1810 (((
1811 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.
1812 )))
1813
1814 (((
1815
1816 )))
1817
1818 [[image:1653358238933-385.png]]
1819
1820
1821 (((
1822 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:
1823 )))
1824
1825 [[image:1653358355238-883.png]]
1826
1827
1828 (((
1829 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/]]
1830 )))
1831
1832 (((
1833 AT+<CMD>?        : Help on <CMD>
1834 )))
1835
1836 (((
1837 AT+<CMD>         : Run <CMD>
1838 )))
1839
1840 (((
1841 AT+<CMD>=<value> : Set the value
1842 )))
1843
1844 (((
1845 AT+<CMD>=?       :  Get the value
1846 )))
1847
1848 (((
1849 ATZ: Trig a reset of the MCU
1850 )))
1851
1852 (((
1853 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1854 )))
1855
1856 (((
1857 AT+DEUI: Get or Set the Device EUI
1858 )))
1859
1860 (((
1861 AT+DADDR: Get or Set the Device Address
1862 )))
1863
1864 (((
1865 AT+APPKEY: Get or Set the Application Key
1866 )))
1867
1868 (((
1869 AT+NWKSKEY: Get or Set the Network Session Key
1870 )))
1871
1872 (((
1873 AT+APPSKEY:  Get or Set the Application Session Key
1874 )))
1875
1876 (((
1877 AT+APPEUI:  Get or Set the Application EUI
1878 )))
1879
1880 (((
1881 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1882 )))
1883
1884 (((
1885 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1886 )))
1887
1888 (((
1889 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1890 )))
1891
1892 (((
1893 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1894 )))
1895
1896 (((
1897 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1898 )))
1899
1900 (((
1901 AT+RX2FQ: Get or Set the Rx2 window frequency
1902 )))
1903
1904 (((
1905 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1906 )))
1907
1908 (((
1909 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1910 )))
1911
1912 (((
1913 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1914 )))
1915
1916 (((
1917 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1918 )))
1919
1920 (((
1921 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1922 )))
1923
1924 (((
1925 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1926 )))
1927
1928 (((
1929 AT+NWKID: Get or Set the Network ID
1930 )))
1931
1932 (((
1933 AT+FCU: Get or Set the Frame Counter Uplink
1934 )))
1935
1936 (((
1937 AT+FCD: Get or Set the Frame Counter Downlink
1938 )))
1939
1940 (((
1941 AT+CLASS: Get or Set the Device Class
1942 )))
1943
1944 (((
1945 AT+JOIN: Join network
1946 )))
1947
1948 (((
1949 AT+NJS: Get OTAA Join Status
1950 )))
1951
1952 (((
1953 AT+SENDB: Send hexadecimal data along with the application port
1954 )))
1955
1956 (((
1957 AT+SEND: Send text data along with the application port
1958 )))
1959
1960 (((
1961 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1962 )))
1963
1964 (((
1965 AT+RECV: Print last received data in raw format
1966 )))
1967
1968 (((
1969 AT+VER:  Get current image version and Frequency Band
1970 )))
1971
1972 (((
1973 AT+CFM: Get or Set the confirmation mode (0-1)
1974 )))
1975
1976 (((
1977 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1978 )))
1979
1980 (((
1981 AT+SNR: Get the SNR of the last received packet
1982 )))
1983
1984 (((
1985 AT+RSSI: Get the RSSI of the last received packet
1986 )))
1987
1988 (((
1989 AT+TDC: Get or set the application data transmission interval in ms
1990 )))
1991
1992 (((
1993 AT+PORT: Get or set the application port
1994 )))
1995
1996 (((
1997 AT+DISAT: Disable AT commands
1998 )))
1999
2000 (((
2001 AT+PWORD: Set password, max 9 digits
2002 )))
2003
2004 (((
2005 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
2006 )))
2007
2008 (((
2009 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
2010 )))
2011
2012 (((
2013 AT+CFG: Print all settings
2014 )))
2015
2016
2017 == 4.2 Common AT Command Sequence ==
2018
2019 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
2020
2021 (((
2022
2023
2024 (((
2025 (% style="color:blue" %)**If device has not joined network yet:**
2026 )))
2027 )))
2028
2029 (((
2030 (% style="background-color:#dcdcdc" %)**123456**
2031 )))
2032
2033 (((
2034 (% style="background-color:#dcdcdc" %)**AT+FDR**
2035 )))
2036
2037 (((
2038 (% style="background-color:#dcdcdc" %)**123456**
2039 )))
2040
2041 (((
2042 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
2043 )))
2044
2045 (((
2046 (% style="background-color:#dcdcdc" %)**ATZ**
2047 )))
2048
2049
2050 (((
2051 (% style="color:blue" %)**If device already joined network:**
2052 )))
2053
2054 (((
2055 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
2056 )))
2057
2058 (((
2059 (% style="background-color:#dcdcdc" %)**ATZ**
2060 )))
2061
2062
2063 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
2064
2065 (((
2066
2067
2068 (((
2069 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
2070 )))
2071 )))
2072
2073 (((
2074 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
2075 )))
2076
2077 (((
2078 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
2079 )))
2080
2081 (((
2082 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
2083 )))
2084
2085 (((
2086 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
2087 )))
2088
2089 (((
2090 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
2091 )))
2092
2093 (((
2094 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
2095 )))
2096
2097 (((
2098 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
2099 )))
2100
2101 (((
2102 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
2103 )))
2104
2105 (((
2106 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
2107 )))
2108
2109 (((
2110 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
2111 )))
2112
2113 (((
2114 (% 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.
2115 )))
2116
2117 (((
2118 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2119
2120
2121 )))
2122
2123 (((
2124 (% style="color:red" %)**Note:**
2125 )))
2126
2127 (((
2128 **~1. Make sure the device is set to ABP mode in the IoT Server.**
2129
2130 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
2131
2132 **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?
2133 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
2134
2135 **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.**
2136
2137
2138 )))
2139
2140 (((
2141 [[image:1653359097980-169.png||height="188" width="729"]]
2142 )))
2143
2144 (((
2145
2146 )))
2147
2148 === 4.2.3 Change to Class A ===
2149
2150
2151 (((
2152 (% style="color:blue" %)**If sensor JOINED:**
2153
2154 (% style="background-color:#dcdcdc" %)**AT+CLASS=A
2155 ATZ**
2156 )))
2157
2158
2159 = 5. Case Study =
2160
2161 == 5.1 Counting how many objects pass in Flow Line ==
2162
2163
2164 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
2165
2166
2167 = 6. FAQ =
2168
2169 == 6.1 How to upgrade the image? ==
2170
2171
2172 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2173
2174 * Support new features
2175 * For bug fix
2176 * Change LoRaWAN bands.
2177
2178 Below shows the hardware connection for how to upload an image to the LT:
2179
2180 [[image:1653359603330-121.png]]
2181
2182
2183 (((
2184 (% 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]].
2185 (% 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]].
2186 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2187
2188
2189 (((
2190 (% style="color:blue" %)**For LT-22222-L**(%%):
2191 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.
2192 )))
2193
2194
2195 )))
2196
2197 [[image:image-20220524103407-12.png]]
2198
2199
2200 [[image:image-20220524103429-13.png]]
2201
2202
2203 [[image:image-20220524104033-15.png]]
2204
2205
2206 (% 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:
2207
2208
2209 [[image:1653360054704-518.png||height="186" width="745"]]
2210
2211
2212 (((
2213 (((
2214 == 6.2 How to change the LoRa Frequency Bands/Region? ==
2215
2216
2217 )))
2218 )))
2219
2220 (((
2221 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2222 )))
2223
2224 (((
2225
2226
2227 == 6.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2228
2229
2230 )))
2231
2232 (((
2233 (((
2234 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2235 )))
2236 )))
2237
2238 (((
2239 (((
2240 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2241
2242
2243 )))
2244 )))
2245
2246 (((
2247 (% 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.
2248
2249
2250 )))
2251
2252 (((
2253 [[image:1653360231087-571.png||height="401" width="727"]]
2254
2255
2256 )))
2257
2258 (((
2259 (% 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.**
2260 )))
2261
2262
2263
2264 (((
2265 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2266
2267
2268 )))
2269
2270 (((
2271 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2272 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2273 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2274 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2275 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2276 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2277 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2278 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2279 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2280 )))
2281
2282
2283 (((
2284 As shown in below:
2285 )))
2286
2287 [[image:1653360498588-932.png||height="485" width="726"]]
2288
2289
2290 == 6.4 How to change the uplink interval？ ==
2291
2292
2293 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/]]
2294
2295
2296 == 6.5 Can I see counting event in Serial? ==
2297
2298
2299 (((
2300 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.
2301
2302
2303 == 6.6 Can i use point to point communication for LT-22222-L? ==
2304
2305
2306 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]].
2307
2308
2309 )))
2310
2311 (((
2312 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2313
2314
2315 If the device is not shut down, but directly powered off.
2316
2317 It will default that this is a power-off state.
2318
2319 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2320
2321 After restart, the status before power failure will be read from flash.
2322
2323
2324 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2325
2326
2327 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2328
2329
2330 [[image:image-20221006170630-1.png||height="610" width="945"]]
2331
2332
2333 == 6.9 Can LT22222-L save RO state? ==
2334
2335
2336 Firmware version needs to be no less than 1.6.0.
2337
2338
2339 = 7. Trouble Shooting =
2340 )))
2341
2342 (((
2343 (((
2344 == 7.1 Downlink doesn't work, how to solve it? ==
2345
2346
2347 )))
2348 )))
2349
2350 (((
2351 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2352 )))
2353
2354 (((
2355
2356
2357 == 7.2 Have trouble to upload image. ==
2358
2359
2360 )))
2361
2362 (((
2363 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2364 )))
2365
2366 (((
2367
2368
2369 == 7.3 Why I can't join TTN in US915 /AU915 bands? ==
2370
2371
2372 )))
2373
2374 (((
2375 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2376 )))
2377
2378
2379 = 8. Order Info =
2380
2381
2382 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2383
2384 (% style="color:#4f81bd" %)**XXX:**
2385
2386 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2387 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2388 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2389 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2390 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2391 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2392 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2393 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2394 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2395
2396 = 9. Packing Info =
2397
2398
2399 **Package Includes**:
2400
2401 * LT-22222-L I/O Controller x 1
2402 * Stick Antenna for LoRa RF part x 1
2403 * Bracket for controller x1
2404 * Program cable x 1
2405
2406 **Dimension and weight**:
2407
2408 * Device Size: 13.5 x 7 x 3 cm
2409 * Device Weight: 105g
2410 * Package Size / pcs : 14.5 x 8 x 5 cm
2411 * Weight / pcs : 170g
2412
2413 = 10. Support =
2414
2415
2416 * (((
2417 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.
2418 )))
2419 * (((
2420 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.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2421
2422
2423
2424 )))
2425
2426 = 11. Reference​​​​​ =
2427
2428
2429 * 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]]
2430 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2431 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]