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Version 118.5 by Xiaoling on 2023/05/17 10:51
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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 == 1.4  Applications ==
193
194
195 * Smart Buildings & Home Automation
196
197 * Logistics and Supply Chain Management
198
199 * Smart Metering
200
201 * Smart Agriculture
202
203 * Smart Cities
204
205 * Smart Factory
206
207 == 1.5 Hardware Variants ==
208
209
210 (% border="1" style="background-color:#f2f2f2; width:500px" %)
211 |(% 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**
212 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)(((
213 (% style="text-align:center" %)
214 [[image:image-20230424115112-1.png||height="106" width="58"]]
215 )))|(% style="width:334px" %)(((
216 * 2 x Digital Input (Bi-direction)
217 * 2 x Digital Output
218 * 2 x Relay Output (5A@250VAC / 30VDC)
219 * 2 x 0~~20mA Analog Input (res:0.01mA)
220 * 2 x 0~~30V Analog Input (res:0.01v)
221 * 1 x Counting Port
222 )))
223
224 = 2. Power ON Device =
225
226
227 (((
228 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.
229 )))
230
231 (((
232 PWR will on when device is properly powered.
233
234
235 )))
236
237 [[image:1653297104069-180.png]]
238
239
240 = 3. Operation Mode =
241
242 == 3.1 How it works? ==
243
244
245 (((
246 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. 
247 )))
248
249 (((
250 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.
251 )))
252
253
254 == 3.2 Example to join LoRaWAN network ==
255
256
257 (((
258 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. 
259
260
261 )))
262
263 [[image:image-20220523172350-1.png||height="266" width="864"]]
264
265
266 (((
267 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:
268
269
270 )))
271
272 (((
273 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
274 )))
275
276 (((
277 Each LT is shipped with a sticker with the default device EUI as below:
278 )))
279
280 [[image:image-20230425173427-2.png||height="246" width="530"]]
281
282
283 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
284
285 **Add APP EUI in the application.**
286
287 [[image:1653297955910-247.png||height="321" width="716"]]
288
289
290 **Add APP KEY and DEV EUI**
291
292 [[image:1653298023685-319.png]]
293
294
295
296 (((
297 (% 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.
298
299
300 )))
301
302 [[image:1653298044601-602.png||height="405" width="709"]]
303
304
305 == 3.3 Uplink Payload ==
306
307
308 There are five working modes + one interrupt mode on LT for different type application:
309
310 * (% style="color:blue" %)**MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
311 * (% style="color:blue" %)**MOD2**(%%): Double DI Counting + DO + RO
312 * (% style="color:blue" %)**MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
313 * (% style="color:blue" %)**MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
314 * (% style="color:blue" %)**MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
315 * (% style="color:blue" %)**ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
316
317 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
318
319
320 (((
321 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default. (% style="display:none" %)
322
323 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
324 |Size(bytes)(% style="display:none" %) |2|2|2|2|1|1|1
325 |Value|(((
326 AVI1
327 voltage
328 )))|(((
329 AVI2
330 voltage
331 )))|(((
332 ACI1
333 Current
334 )))|(((
335 ACI2
336 Current
337 )))|DIDORO*|(((
338 Reserve
339 )))|MOD
340 )))
341
342
343 (((
344
345
346 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
347
348 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
349 |bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
350 |RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
351 )))
352
353
354 * RO is for relay. ROx=1 : close，ROx=0 always open.
355 * DI is for digital input. DIx=1: high or float, DIx=0: low.
356 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
357
358 (% style="color:red" %)**Note: DI3 and DO3 bit are not valid for LT-22222-L**
359
360 For example if payload is: [[image:image-20220523175847-2.png]]
361
362
363 **The value for the interface is:  **
364
365 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
366
367 AVI2 channel voltage is 0x04AC/1000=1.196V
368
369 ACI1 channel current is 0x1310/1000=4.880mA
370
371 ACI2 channel current is 0x1300/1000=4.864mA
372
373 The last byte 0xAA= 10101010(B) means
374
375 * [1] RO1 relay channel is close and the RO1 LED is ON.
376 * [0] RO2 relay channel is open and RO2 LED is OFF;
377
378 **LT22222-L:**
379
380 * [1] DI2 channel is high input and DI2 LED is ON;
381 * [0] DI1 channel is low input;
382
383 * [0] DO3 channel output state
384 ** DO3 is float in case no load between DO3 and V+.;
385 ** DO3 is high in case there is load between DO3 and V+.
386 ** DO3 LED is off in both case
387 * [1] DO2 channel output is low and DO2 LED is ON.
388 * [0] DO1 channel output state
389 ** DO1 is float in case no load between DO1 and V+.;
390 ** DO1 is high in case there is load between DO1 and V+.
391 ** DO1 LED is off in both case
392
393 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
394
395
396 (((
397 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
398 )))
399
400 (((
401 Total : 11 bytes payload
402
403 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
404 |Size(bytes)|4|4|1|1|1
405 |Value|COUNT1|COUNT2 |DIDORO*|(((
406 Reserve
407
408
409 )))|MOD
410 )))
411
412 (((
413
414
415 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
416
417 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
418 |bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
419 |RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
420
421 RO is for relay. ROx=1 : close，ROx=0 always open.
422 )))
423
424 * FIRST: Indicate this is the first packet after join network.
425 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
426
427 (((
428 (% style="color:red" %)**Note: DO3 bit is not valid for LT-22222-L.**
429 )))
430
431 (((
432
433
434 **To use counting mode, please run:**
435 )))
436
437 (% class="box infomessage" %)
438 (((
439 (((
440 (((
441 **AT+MOD=2**
442 )))
443
444 (((
445 **ATZ**
446 )))
447 )))
448 )))
449
450 (((
451
452
453 (% style="color:#4f81bd" %)**AT Commands for counting:**
454
455
456 )))
457
458 (((
459 **For LT22222-L:**
460
461
462 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
463
464 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
465
466 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
467
468 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
469
470 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
471
472 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
473 )))
474
475
476 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
477
478
479 **LT22222-L**: This mode the DI1 is used as a counting pin.
480
481 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
482 |Size(bytes)|4|2|2|1|1|1
483 |Value|COUNT1|(((
484 ACI1 Current
485 )))|(((
486 ACI2 Current
487 )))|DIDORO*|Reserve|MOD
488
489 [[image:image-20220523181246-5.png]]
490
491 (((
492
493
494 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
495 )))
496
497 [[image:image-20220523181301-6.png]]
498
499 * RO is for relay. ROx=1 : close，ROx=0 always open.
500 * FIRST: Indicate this is the first packet after join network.
501 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
502
503 (((
504 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
505 )))
506
507
508 (((
509 **To use counting mode, please run:**
510 )))
511
512 (% class="box infomessage" %)
513 (((
514 (((
515 (((
516 **AT+MOD=3**
517 )))
518
519 (((
520 **ATZ**
521 )))
522 )))
523 )))
524
525 (((
526 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
527 )))
528
529
530 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
531
532
533 (((
534 **LT22222-L**: This mode the DI1 is used as a counting pin.
535 )))
536
537 (((
538 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.
539 )))
540
541 [[image:image-20220523181903-8.png]]
542
543
544 (((
545 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
546 )))
547
548 [[image:image-20220523181727-7.png]]
549
550 * RO is for relay. ROx=1 : close，ROx=0 always open.
551 * FIRST: Indicate this is the first packet after join network.
552 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
553
554 (((
555 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
556 )))
557
558 (((
559
560
561 **To use this mode, please run:**
562 )))
563
564 (% class="box infomessage" %)
565 (((
566 (((
567 (((
568 **AT+MOD=4**
569 )))
570
571 (((
572 **ATZ**
573 )))
574 )))
575 )))
576
577
578 (((
579 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
580 )))
581
582 (((
583
584
585 **Plus below command for AVI1 Counting:**
586
587
588 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
589
590 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
591
592 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
593
594 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
595 )))
596
597
598 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
599
600
601 **LT22222-L**: This mode the DI1 is used as a counting pin.
602
603 [[image:image-20220523182334-9.png]]
604
605 (((
606
607
608 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
609 )))
610
611 * RO is for relay. ROx=1 : close，ROx=0 always open.
612 * FIRST: Indicate this is the first packet after join network.
613 * (((
614 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
615 )))
616
617 (((
618 (% style="color:red" %)**Note: DO3 is not valid for LT-22222-L.**
619 )))
620
621 (((
622
623
624 **To use this mode, please run:**
625 )))
626
627 (% class="box infomessage" %)
628 (((
629 (((
630 (((
631 **AT+MOD=5**
632 )))
633
634 (((
635 **ATZ**
636 )))
637 )))
638 )))
639
640 (((
641 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
642 )))
643
644
645 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
646
647
648 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
649
650 For example, if user has configured below commands:
651
652 * **AT+MOD=1 ** **~-~->**  The normal working mode
653 * **AT+ADDMOD6=1**   **~-~->**  Enable trigger
654
655 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
656
657 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
658 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.**
659
660 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
661
662
663 (% style="color:#4f81bd" %)**Trigger base on voltage**:
664
665 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
666
667
668 **Example:**
669
670 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)
671
672 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
673
674
675
676 (% style="color:#4f81bd" %)**Trigger base on current**:
677
678 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
679
680
681 **Example:**
682
683 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
684
685
686
687 (% style="color:#4f81bd" %)**Trigger base on DI status**:
688
689 DI status trigger Flag.
690
691 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
692
693
694 **Example:**
695
696 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
697
698
699 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
700
701 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
702
703 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
704
705 AA: Code for this downlink Command:
706
707 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
708
709 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
710
711 yy2 yy2: AC1 or AV1 high limit.
712
713 yy3 yy3: AC2 or AV2 low limit.
714
715 Yy4 yy4: AC2 or AV2 high limit.
716
717
718 **Example1**: AA 00 13 88 00 00 00 00 00 00
719
720 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
721
722
723 **Example2**: AA 02 01 00
724
725 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
726
727
728
729 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
730
731 MOD6 Payload : total 11 bytes payload
732
733 [[image:image-20220524085923-1.png]]
734
735
736 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
737
738 [[image:image-20220524090106-2.png]]
739
740 * Each bits shows if the corresponding trigger has been configured.
741
742 **Example:**
743
744 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
745
746
747
748 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
749
750 [[image:image-20220524090249-3.png]]
751
752 * Each bits shows which status has been trigger on this uplink.
753
754 **Example:**
755
756 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
757
758
759 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
760
761 [[image:image-20220524090456-4.png]]
762
763 * Each bits shows which status has been trigger on this uplink.
764
765 **Example:**
766
767 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
768
769 00000101: Means both DI1 and DI2 trigger are enabled.
770
771
772 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
773
774 Downlink command to poll MOD6 status:
775
776 **AB 06**
777
778 When device got this command, it will send the MOD6 payload.
779
780
781 === 3.3.7 Payload Decoder ===
782
783 (((
784
785
786 **Decoder for TTN/loraserver/ChirpStack**:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
787 )))
788
789
790 == 3.4 ​Configure LT via AT or Downlink ==
791
792
793 (((
794 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
795 )))
796
797 (((
798 (((
799 There are two kinds of Commands:
800 )))
801 )))
802
803 * (% 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]]
804
805 * (% style="color:blue" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
806
807 === 3.4.1 Common Commands ===
808
809
810 (((
811 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]]
812 )))
813
814
815 === 3.4.2 Sensor related commands ===
816
817 ==== 3.4.2.1 Set Transmit Interval ====
818
819
820 Set device uplink interval.
821
822 * (% style="color:#037691" %)**AT Command:**
823
824 (% style="color:blue" %)**AT+TDC=N **
825
826
827 **Example: **AT+TDC=30000. Means set interval to 30 seconds
828
829
830 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
831
832 (% style="color:blue" %)**0x01 aa bb cc  **(%%)** ~/~/ Same as AT+TDC=0x(aa bb cc)**
833
834
835
836 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
837
838
839 Set work mode.
840
841 * (% style="color:#037691" %)**AT Command:**
842
843 (% style="color:blue" %)**AT+MOD=N  **
844
845
846 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
847
848
849 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
850
851 (% style="color:blue" %)**0x0A aa  **(%%)** ** ~/~/ Same as AT+MOD=aa
852
853
854
855 ==== 3.4.2.3 Poll an uplink ====
856
857
858 * (% style="color:#037691" %)**AT Command:**
859
860 There is no AT Command to poll uplink
861
862
863 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
864
865 (% style="color:blue" %)**0x08 FF  **(%%)** **~/~/ Poll an uplink
866
867
868 **Example**: 0x08FF, ask device to send an Uplink
869
870
871
872 ==== 3.4.2.4 Enable Trigger Mode ====
873
874
875 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
876
877 * (% style="color:#037691" %)**AT Command:**
878
879 (% style="color:blue" %)**AT+ADDMOD6=1 or 0**
880
881 (% style="color:red" %)**1:** (%%)Enable Trigger Mode
882
883 (% style="color:red" %)**0: **(%%)Disable Trigger Mode
884
885
886 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
887
888 (% style="color:blue" %)**0x0A 06 aa    **(%%) ~/~/ Same as AT+ADDMOD6=aa
889
890
891
892 ==== 3.4.2.5 Poll trigger settings ====
893
894
895 Poll trigger settings,
896
897 * (% style="color:#037691" %)**AT Command:**
898
899 There is no AT Command for this feature.
900
901
902 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
903
904 (% style="color:blue" %)**0xAB 06  ** (%%) ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
905
906
907
908 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
909
910
911 Enable Disable DI1/DI2/DI2 as trigger,
912
913 * (% style="color:#037691" %)**AT Command:**
914
915 (% style="color:blue" %)**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
916
917
918 **Example:**
919
920 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
921
922 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
923
924 (% style="color:blue" %)**0xAA 02 aa bb   ** (%%) ~/~/ Same as AT+DTRI=aa,bb
925
926
927
928 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
929
930
931 Set DI1 or DI3(for LT-33222-L) trigger.
932
933 * (% style="color:#037691" %)**AT Command:**
934
935 (% style="color:blue" %)**AT+TRIG1=a,b**
936
937 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
938
939 (% style="color:red" %)**b :** (%%)delay timing.
940
941
942 **Example:**
943
944 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
945
946
947 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
948
949 (% style="color:blue" %)**0x09 01 aa bb cc    ** (%%) ~/~/ same as AT+TRIG1=aa,0x(bb cc)
950
951
952
953 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
954
955
956 Set DI2 trigger.
957
958 * (% style="color:#037691" %)**AT Command:**
959
960 (% style="color:blue" %)**AT+TRIG2=a,b**
961
962 (% style="color:red" %)**a :** (%%)Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
963
964 (% style="color:red" %)**b :** (%%)delay timing.
965
966
967 **Example:**
968
969 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
970
971
972 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
973
974 (% style="color:blue" %)**0x09 02 aa bb cc   ** (%%)~/~/ same as AT+TRIG2=aa,0x(bb cc)
975
976
977
978 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
979
980
981 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
982
983 * (% style="color:#037691" %)**AT Command**
984
985 (% style="color:blue" %)**AT+ACLIM**
986
987
988 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
989
990 (% 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"]]
991
992
993
994 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
995
996
997 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
998
999 * (% style="color:#037691" %)**AT Command**
1000
1001 (% style="color:blue" %)**AT+AVLIM    **(%%)** See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1002
1003
1004 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
1005
1006 (% 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"]]
1007
1008
1009
1010 ==== 3.4.2.11 Trigger – Set minimum interval ====
1011
1012
1013 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
1014
1015 * (% style="color:#037691" %)**AT Command**
1016
1017 (% style="color:blue" %)**AT+ATDC=5        ** (%%)Device won't response the second trigger within 5 minute after the first trigger.
1018
1019
1020 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
1021
1022 (% style="color:blue" %)**0x AC aa bb   **(%%) ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
1023
1024 (((
1025
1026
1027 (% style="color:red" %)**Note: ATDC setting must be more than 5min**
1028 )))
1029
1030
1031
1032 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1033
1034
1035 * (% style="color:#037691" %)**AT Command**
1036
1037 There is no AT Command to control Digital Output
1038
1039
1040 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
1041 * (% style="color:blue" %)**0x02 aa bb cc     ** (%%)~/~/ Set DO1/DO2/DO3 output
1042
1043 (((
1044 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1045 )))
1046
1047 (((
1048 01: Low,  00: High ,  11: No action
1049 )))
1050
1051 [[image:image-20220524092754-5.png]]
1052
1053 (((
1054 (% style="color:red" %)**Note: For LT-22222-L, there is no DO3, the last byte can use any value.**
1055 )))
1056
1057 (((
1058 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1059 )))
1060
1061
1062
1063 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1064
1065
1066 * (% style="color:#037691" %)**AT Command**
1067
1068 There is no AT Command to control Digital Output
1069
1070
1071 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
1072
1073 (% style="color:blue" %)**0xA9 aa bb cc     **(%%) ~/~/ Set DO1/DO2/DO3 output with time control
1074
1075
1076 This is to control the digital output time of DO pin. Include four bytes:
1077
1078 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1079
1080 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1081
1082 01: DO pins will change back to original state after timeout.
1083
1084 00: DO pins will change to an inverter state after timeout 
1085
1086
1087 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1088
1089 [[image:image-20220524093238-6.png]]
1090
1091
1092 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1093
1094 [[image:image-20220524093328-7.png]]
1095
1096
1097 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1098
1099 [[image:image-20220524093351-8.png]]
1100
1101
1102 (% style="color:#4f81bd" %)**Sixth and Seventh and Eighth and Ninth Byte**:
1103
1104 Latching time. Unit: ms
1105
1106
1107 (% style="color:red" %)**Note: **
1108
1109 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1110
1111 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1112
1113
1114 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1115
1116
1117 **Example payload:**
1118
1119 **~1. A9 01 01 01 01 07 D0**
1120
1121 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1122
1123 **2. A9 01 00 01 11 07 D0**
1124
1125 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1126
1127 **3. A9 00 00 00 00 07 D0**
1128
1129 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1130
1131 **4. A9 00 11 01 00 07 D0**
1132
1133 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
1134
1135
1136
1137 ==== 3.4.2. 14 Relay ~-~- Control Relay Output RO1/RO2 ====
1138
1139
1140 * (% style="color:#037691" %)**AT Command:**
1141
1142 There is no AT Command to control Relay Output
1143
1144
1145 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1146
1147 (% style="color:blue" %)**0x03 aa bb     ** (%%)~/~/ Set RO1/RO2 output
1148
1149
1150 (((
1151 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1152 )))
1153
1154 (((
1155 01: Close ,  00: Open , 11: No action
1156 )))
1157
1158 (((
1159 [[image:image-20230426161322-1.png]]
1160 )))
1161
1162 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1163
1164
1165
1166 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1167
1168
1169 * (% style="color:#037691" %)**AT Command:**
1170
1171 There is no AT Command to control Relay Output
1172
1173
1174 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1175
1176 (% style="color:blue" %)**0x05 aa bb cc dd     ** (%%)~/~/ Set RO1/RO2 relay with time control
1177
1178
1179 This is to control the relay output time of relay. Include four bytes:
1180
1181 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1182
1183 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1184
1185 01: Relays will change back to original state after timeout.
1186
1187 00: Relays will change to an inverter state after timeout
1188
1189
1190 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1191
1192 [[image:image-20221008095908-1.png||height="364" width="564"]]
1193
1194
1195 (% style="color:#4f81bd" %)**Fourth/Fifth/Sixth/Seventh Bytes(cc)**(%%): Latching time. Unit: ms
1196
1197
1198 (% style="color:red" %)**Note:**
1199
1200 Since Firmware v1.6.0, the latch time support 4 bytes and 2 bytes
1201
1202 Before Firmwre v1.6.0 the latch time only suport 2 bytes.
1203
1204
1205 (% style="color:red" %)**Device will upload a packet if downlink code executes successfully.**
1206
1207
1208 **Example payload:**
1209
1210 **~1. 05 01 11 07 D0**
1211
1212 Relay1 and Relay 2 will be set to NC , last 2 seconds, then change back to original state.
1213
1214 **2. 05 01 10 07 D0**
1215
1216 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then both change back to original state.
1217
1218 **3. 05 00 01 07 D0**
1219
1220 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then relay change to NC,Relay2 change to NO.
1221
1222 **4. 05 00 00 07 D0**
1223
1224 Relay 1 & relay2 will change to NO, last 2 seconds, then both change to NC.
1225
1226
1227
1228 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1229
1230
1231 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1232
1233 * (% style="color:#037691" %)**AT Command:**
1234
1235 (% style="color:blue" %)**AT+VOLMAX   ** (%%)~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1236
1237
1238 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1239
1240 (% style="color:blue" %)**0xA5 aa bb cc   ** (%%)~/~/ Same as AT+VOLMAX=(aa bb),cc
1241
1242
1243
1244 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1245
1246
1247 * (% style="color:#037691" %)**AT Command:**
1248
1249 (% style="color:blue" %)**AT+SETCNT=aa,(bb cc dd ee) **
1250
1251 (% style="color:red" %)**aa:**(%%) 1: Set count1; 2: Set count2; 3: Set AV1 count
1252
1253 (% style="color:red" %)**bb cc dd ee: **(%%)number to be set
1254
1255
1256 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1257
1258 (% style="color:blue" %)**0x A8 aa bb cc dd ee     ** (%%)~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1259
1260
1261
1262 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1263
1264
1265 Clear counting for counting mode
1266
1267 * (% style="color:#037691" %)**AT Command:**
1268
1269 (% style="color:blue" %)**AT+CLRCOUNT **(%%) ~/~/ clear all counting
1270
1271
1272 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1273
1274 (% style="color:blue" %)**0x A6 01    ** (%%)~/~/ clear all counting
1275
1276
1277
1278 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1279
1280
1281 * (% style="color:#037691" %)**AT Command:**
1282
1283 (% 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)
1284
1285
1286 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1287
1288 (% style="color:blue" %)**0x A7 aa bb cc     ** (%%)~/~/ same as AT+COUTIME =aa bb cc,
1289
1290 (((
1291 range: aa bb cc:0 to 16777215,  (unit:second)
1292 )))
1293
1294
1295
1296 ==== 3.4.2.20 Reset save RO DO state ====
1297
1298
1299 * (% style="color:#037691" %)**AT Command:**
1300
1301 (% style="color:blue" %)**AT+RODORESET=1    **(%%)~/~/ RODO will close when the device joining the network. (default)
1302
1303 (% 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.
1304
1305
1306 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAD):**
1307
1308 (% style="color:blue" %)**0x AD aa      ** (%%)~/~/ same as AT+RODORET =aa
1309
1310
1311
1312 ==== 3.4.2.21 Encrypted payload ====
1313
1314
1315 * (% style="color:#037691" %)**AT Command:**
1316
1317 (% style="color:blue" %)**AT+DECRYPT=1  ** (%%)~/~/ The payload is uploaded without encryption
1318
1319 (% style="color:blue" %)**AT+DECRYPT=0    **(%%)~/~/  Encrypt when uploading payload (default)
1320
1321
1322
1323 ==== 3.4.2.22 Get sensor value ====
1324
1325
1326 * (% style="color:#037691" %)**AT Command:**
1327
1328 (% style="color:blue" %)**AT+GETSENSORVALUE=0    **(%%)~/~/ The serial port gets the reading of the current sensor
1329
1330 (% style="color:blue" %)**AT+GETSENSORVALUE=1    **(%%)~/~/ The serial port gets the current sensor reading and uploads it.
1331
1332
1333
1334 ==== 3.4.2.23 Resets the downlink packet count ====
1335
1336
1337 * (% style="color:#037691" %)**AT Command:**
1338
1339 (% 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)
1340
1341 (% 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.
1342
1343
1344
1345 ==== 3.4.2.24 When the limit bytes are exceeded, upload in batches ====
1346
1347
1348 * (% style="color:#037691" %)**AT Command:**
1349
1350 (% 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)
1351
1352 (% 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.
1353
1354
1355 * (% style="color:#037691" %)**Downlink Payload **(%%)**:**
1356
1357 (% style="color:blue" %)**0x21 00 01 ** (%%) ~/~/ Set  the DISMACANS=1
1358
1359
1360
1361 ==== 3.4.2.25 Copy downlink to uplink ====
1362
1363
1364 * (% style="color:#037691" %)**AT Command**(%%)**:**
1365
1366 (% 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.
1367
1368 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.
1369
1370
1371 [[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"]]
1372
1373 For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.
1374
1375
1376
1377 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173833-7.png?width=1124&height=149&rev=1.1||alt="image-20220823173833-7.png"]]
1378
1379 For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.
1380
1381
1382
1383 ==== 3.4.2.26 Query version number and frequency band 、TDC ====
1384
1385
1386 * (((
1387 (% style="color:#037691" %)**Downlink Payload**(%%)**:**
1388
1389 (% style="color:blue" %)**26 01  ** (%%) ~/~/  Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.
1390
1391
1392 )))
1393
1394 **Example：**
1395
1396 [[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"]]
1397
1398
1399 == 3.5 Integrate with Mydevice ==
1400
1401
1402 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:
1403
1404 (((
1405 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1406 )))
1407
1408 (((
1409 (% 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:
1410
1411
1412 )))
1413
1414 [[image:image-20220719105525-1.png||height="377" width="677"]]
1415
1416
1417
1418 [[image:image-20220719110247-2.png||height="388" width="683"]]
1419
1420
1421 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1422
1423 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1424
1425 Search under The things network
1426
1427 [[image:1653356838789-523.png||height="337" width="740"]]
1428
1429
1430
1431 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1432
1433 [[image:image-20220524094909-1.png||height="335" width="729"]]
1434
1435
1436 [[image:image-20220524094909-2.png||height="337" width="729"]]
1437
1438
1439 [[image:image-20220524094909-3.png||height="338" width="727"]]
1440
1441
1442 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1443
1444
1445 [[image:image-20220524094909-5.png||height="341" width="734"]]
1446
1447
1448 == 3.6 Interface Detail ==
1449
1450 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1451
1452
1453 Support NPN Type sensor
1454
1455 [[image:1653356991268-289.png]]
1456
1457
1458 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1459
1460
1461 (((
1462 The DI port of LT-22222-L can support NPN or PNP output sensor.
1463 )))
1464
1465 (((
1466 (((
1467 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.
1468
1469
1470 )))
1471 )))
1472
1473 [[image:1653357170703-587.png]]
1474
1475 (((
1476 (((
1477 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1478 )))
1479 )))
1480
1481 (((
1482
1483 )))
1484
1485 (((
1486 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1487 )))
1488
1489 (((
1490 This type of sensor will output a low signal GND when active.
1491 )))
1492
1493 * (((
1494 Connect sensor's output to DI1-
1495 )))
1496 * (((
1497 Connect sensor's VCC to DI1+.
1498 )))
1499
1500 (((
1501 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1502 )))
1503
1504 (((
1505 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1**+** / 1K.**
1506 )))
1507
1508 (((
1509 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.
1510 )))
1511
1512 (((
1513
1514 )))
1515
1516 (((
1517 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1518 )))
1519
1520 (((
1521 This type of sensor will output a high signal (example 24v) when active.
1522 )))
1523
1524 * (((
1525 Connect sensor's output to DI1+
1526 )))
1527 * (((
1528 Connect sensor's GND DI1-.
1529 )))
1530
1531 (((
1532 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1533 )))
1534
1535 (((
1536 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1537 )))
1538
1539 (((
1540 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.
1541 )))
1542
1543 (((
1544
1545 )))
1546
1547 (((
1548 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1549 )))
1550
1551 (((
1552 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1553 )))
1554
1555 * (((
1556 Connect sensor's output to DI1+ with a serial 50K resistor
1557 )))
1558 * (((
1559 Connect sensor's GND DI1-.
1560 )))
1561
1562 (((
1563 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1564 )))
1565
1566 (((
1567 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1568 )))
1569
1570 (((
1571 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.
1572 )))
1573
1574
1575 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1576
1577
1578 (% style="color:blue" %)**NPN output**(%%): GND or Float. Max voltage can apply to output pin is 36v.
1579
1580 (% style="color:red" %)**Note: DO pins go to float when device is power off.**
1581
1582 [[image:1653357531600-905.png]]
1583
1584
1585 === 3.6.4 Analog Input Interface ===
1586
1587
1588 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:
1589
1590
1591 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1592
1593 [[image:1653357592296-182.png]]
1594
1595 Example to connect a 4~~20mA sensor
1596
1597 We take the wind speed sensor as an example for reference only.
1598
1599
1600 (% style="color:blue" %)**Specifications of the wind speed sensor:**
1601
1602 (% style="color:red" %)**Red:  12~~24v**
1603
1604 (% style="color:#ffc000" %)**Yellow:  4~~20mA**
1605
1606 **Black:  GND**
1607
1608
1609 **Connection diagram:**
1610
1611 [[image:1653357640609-758.png]]
1612
1613 [[image:1653357648330-671.png||height="155" width="733"]]
1614
1615
1616 === 3.6.5 Relay Output ===
1617
1618
1619 (((
1620 The LT serial controller has two relay interfaces; each interface uses two pins of the screw terminal. User can connect other device's Power Line to in serial of RO1_1 and RO_2. Such as below:
1621
1622 **Note**: RO pins go to Open(NO) when device is power off.
1623 )))
1624
1625 [[image:image-20220524100215-9.png]]
1626
1627
1628 [[image:image-20220524100215-10.png||height="382" width="723"]]
1629
1630
1631 == 3.7 LEDs Indicators ==
1632
1633
1634 [[image:image-20220524100748-11.png]]
1635
1636
1637 = 4. Use AT Command =
1638
1639 == 4.1 Access AT Command ==
1640
1641
1642 (((
1643 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.
1644 )))
1645
1646 (((
1647
1648 )))
1649
1650 [[image:1653358238933-385.png]]
1651
1652
1653 (((
1654 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:
1655 )))
1656
1657 [[image:1653358355238-883.png]]
1658
1659
1660 (((
1661 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/]]
1662 )))
1663
1664 (((
1665 AT+<CMD>?        : Help on <CMD>
1666 )))
1667
1668 (((
1669 AT+<CMD>         : Run <CMD>
1670 )))
1671
1672 (((
1673 AT+<CMD>=<value> : Set the value
1674 )))
1675
1676 (((
1677 AT+<CMD>=?       :  Get the value
1678 )))
1679
1680 (((
1681 ATZ: Trig a reset of the MCU
1682 )))
1683
1684 (((
1685 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1686 )))
1687
1688 (((
1689 AT+DEUI: Get or Set the Device EUI
1690 )))
1691
1692 (((
1693 AT+DADDR: Get or Set the Device Address
1694 )))
1695
1696 (((
1697 AT+APPKEY: Get or Set the Application Key
1698 )))
1699
1700 (((
1701 AT+NWKSKEY: Get or Set the Network Session Key
1702 )))
1703
1704 (((
1705 AT+APPSKEY:  Get or Set the Application Session Key
1706 )))
1707
1708 (((
1709 AT+APPEUI:  Get or Set the Application EUI
1710 )))
1711
1712 (((
1713 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1714 )))
1715
1716 (((
1717 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1718 )))
1719
1720 (((
1721 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1722 )))
1723
1724 (((
1725 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1726 )))
1727
1728 (((
1729 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1730 )))
1731
1732 (((
1733 AT+RX2FQ: Get or Set the Rx2 window frequency
1734 )))
1735
1736 (((
1737 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1738 )))
1739
1740 (((
1741 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1742 )))
1743
1744 (((
1745 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1746 )))
1747
1748 (((
1749 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1750 )))
1751
1752 (((
1753 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1754 )))
1755
1756 (((
1757 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1758 )))
1759
1760 (((
1761 AT+NWKID: Get or Set the Network ID
1762 )))
1763
1764 (((
1765 AT+FCU: Get or Set the Frame Counter Uplink
1766 )))
1767
1768 (((
1769 AT+FCD: Get or Set the Frame Counter Downlink
1770 )))
1771
1772 (((
1773 AT+CLASS: Get or Set the Device Class
1774 )))
1775
1776 (((
1777 AT+JOIN: Join network
1778 )))
1779
1780 (((
1781 AT+NJS: Get OTAA Join Status
1782 )))
1783
1784 (((
1785 AT+SENDB: Send hexadecimal data along with the application port
1786 )))
1787
1788 (((
1789 AT+SEND: Send text data along with the application port
1790 )))
1791
1792 (((
1793 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1794 )))
1795
1796 (((
1797 AT+RECV: Print last received data in raw format
1798 )))
1799
1800 (((
1801 AT+VER:  Get current image version and Frequency Band
1802 )))
1803
1804 (((
1805 AT+CFM: Get or Set the confirmation mode (0-1)
1806 )))
1807
1808 (((
1809 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1810 )))
1811
1812 (((
1813 AT+SNR: Get the SNR of the last received packet
1814 )))
1815
1816 (((
1817 AT+RSSI: Get the RSSI of the last received packet
1818 )))
1819
1820 (((
1821 AT+TDC: Get or set the application data transmission interval in ms
1822 )))
1823
1824 (((
1825 AT+PORT: Get or set the application port
1826 )))
1827
1828 (((
1829 AT+DISAT: Disable AT commands
1830 )))
1831
1832 (((
1833 AT+PWORD: Set password, max 9 digits
1834 )))
1835
1836 (((
1837 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1838 )))
1839
1840 (((
1841 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1842 )))
1843
1844 (((
1845 AT+CFG: Print all settings
1846 )))
1847
1848
1849 == 4.2 Common AT Command Sequence ==
1850
1851 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1852
1853 (((
1854
1855
1856 (((
1857 (% style="color:blue" %)**If device has not joined network yet:**
1858 )))
1859 )))
1860
1861 (((
1862 (% style="background-color:#dcdcdc" %)**123456**
1863 )))
1864
1865 (((
1866 (% style="background-color:#dcdcdc" %)**AT+FDR**
1867 )))
1868
1869 (((
1870 (% style="background-color:#dcdcdc" %)**123456**
1871 )))
1872
1873 (((
1874 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1875 )))
1876
1877 (((
1878 (% style="background-color:#dcdcdc" %)**ATZ**
1879 )))
1880
1881
1882 (((
1883 (% style="color:blue" %)**If device already joined network:**
1884 )))
1885
1886 (((
1887 (% style="background-color:#dcdcdc" %)**AT+NJM=0**
1888 )))
1889
1890 (((
1891 (% style="background-color:#dcdcdc" %)**ATZ**
1892 )))
1893
1894
1895 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1896
1897 (((
1898
1899
1900 (((
1901 (% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter Password to have AT access.
1902 )))
1903 )))
1904
1905 (((
1906 (% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset Parameters to Factory Default, Keys Reserve
1907 )))
1908
1909 (((
1910 (% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter Password to have AT access.
1911 )))
1912
1913 (((
1914 (% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to work in CLASS C
1915 )))
1916
1917 (((
1918 (% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
1919 )))
1920
1921 (((
1922 (% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
1923 )))
1924
1925 (((
1926 (% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
1927 )))
1928
1929 (((
1930 (% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
1931 )))
1932
1933 (((
1934 (% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4Mhz
1935 )))
1936
1937 (((
1938 (% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2Frequency to 868.4Mhz (according to the result from server)
1939 )))
1940
1941 (((
1942 (% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2DR to match the downlink DR from server. see below
1943 )))
1944
1945 (((
1946 (% 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.
1947 )))
1948
1949 (((
1950 (% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
1951
1952
1953 )))
1954
1955 (((
1956 (% style="color:red" %)**Note:**
1957 )))
1958
1959 (((
1960 **~1. Make sure the device is set to ABP mode in the IoT Server.**
1961
1962 **2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.**
1963
1964 **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?
1965 dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
1966
1967 **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.**
1968
1969
1970 )))
1971
1972 (((
1973 [[image:1653359097980-169.png||height="188" width="729"]]
1974 )))
1975
1976 (((
1977
1978 )))
1979
1980 === 4.2.3 Change to Class A ===
1981
1982
1983 (((
1984 (% style="color:blue" %)**If sensor JOINED:**
1985
1986 (% style="background-color:#dcdcdc" %)**AT+CLASS=A
1987 ATZ**
1988 )))
1989
1990
1991 = 5. Case Study =
1992
1993 == 5.1 Counting how many objects pass in Flow Line ==
1994
1995
1996 Reference Link: [[How to set up to count objects pass in flow line>>How to set up to count objects pass in flow line]]?
1997
1998
1999 = 6. FAQ =
2000
2001 == 6.1 How to upgrade the image? ==
2002
2003
2004 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
2005
2006 * Support new features
2007 * For bug fix
2008 * Change LoRaWAN bands.
2009
2010 Below shows the hardware connection for how to upload an image to the LT:
2011
2012 [[image:1653359603330-121.png]]
2013
2014
2015 (((
2016 (% 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]].
2017 (% 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]].
2018 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
2019
2020
2021 (((
2022 (% style="color:blue" %)**For LT-22222-L**(%%):
2023 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.
2024 )))
2025
2026
2027 )))
2028
2029 [[image:image-20220524103407-12.png]]
2030
2031
2032 [[image:image-20220524103429-13.png]]
2033
2034
2035 [[image:image-20220524104033-15.png]]
2036
2037
2038 (% 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:
2039
2040
2041 [[image:1653360054704-518.png||height="186" width="745"]]
2042
2043
2044 (((
2045 (((
2046 == 6.2 How to change the LoRa Frequency Bands/Region? ==
2047
2048
2049 )))
2050 )))
2051
2052 (((
2053 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
2054 )))
2055
2056 (((
2057
2058
2059 == 6.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
2060
2061
2062 )))
2063
2064 (((
2065 (((
2066 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
2067 )))
2068 )))
2069
2070 (((
2071 (((
2072 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
2073
2074
2075 )))
2076 )))
2077
2078 (((
2079 (% 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.
2080
2081
2082 )))
2083
2084 (((
2085 [[image:1653360231087-571.png||height="401" width="727"]]
2086
2087
2088 )))
2089
2090 (((
2091 (% 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.**
2092 )))
2093
2094
2095
2096 (((
2097 (% style="color:blue" %)**Step2**(%%)**:  **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
2098
2099
2100 )))
2101
2102 (((
2103 (% style="background-color:#dcdcdc" %)**123456** (%%) :  Enter Password to have AT access.
2104 (% style="background-color:#dcdcdc" %)**AT+FDR**(%%)  :  Reset Parameters to Factory Default, Keys Reserve
2105 (% style="background-color:#dcdcdc" %)**AT+NJM=0** (%%) :  Set to ABP mode
2106 (% style="background-color:#dcdcdc" %)**AT+ADR=0** (%%) :  Set the Adaptive Data Rate Off
2107 (% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) :  Set Data Rate (Set AT+DR=3 for 915 band)
2108 (% style="background-color:#dcdcdc" %)**AT+TDC=60000 **(%%) :  Set transmit interval to 60 seconds
2109 (% style="background-color:#dcdcdc" %)**AT+CHS=868400000**(%%) : Set transmit frequency to 868.4Mhz
2110 (% style="background-color:#dcdcdc" %)**AT+DADDR=26 01 1A F1**(%%)  :  Set Device Address to 26 01 1A F1
2111 (% style="background-color:#dcdcdc" %)**ATZ**        (%%) :  Reset MCU
2112 )))
2113
2114
2115 (((
2116 As shown in below:
2117 )))
2118
2119 [[image:1653360498588-932.png||height="485" width="726"]]
2120
2121
2122 == 6.4 How to change the uplink interval？ ==
2123
2124
2125 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/]]
2126
2127
2128 == 6.5 Can I see counting event in Serial? ==
2129
2130
2131 (((
2132 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.
2133
2134
2135 == 6.6 Can i use point to point communication for LT-22222-L? ==
2136
2137
2138 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]].
2139
2140
2141 )))
2142
2143 (((
2144 == 6.7 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2145
2146
2147 If the device is not shut down, but directly powered off.
2148
2149 It will default that this is a power-off state.
2150
2151 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2152
2153 After restart, the status before power failure will be read from flash.
2154
2155
2156 == 6.8 Can i set up LT-22222-L as a NC(Normal Close) Relay? ==
2157
2158
2159 LT-22222-L built-in relay is NO (Normal Open). User can use an external relay to achieve Normal Close purpose. Diagram as below:
2160
2161
2162 [[image:image-20221006170630-1.png||height="610" width="945"]]
2163
2164
2165 == 6.9 Can LT22222-L save RO state? ==
2166
2167
2168 Firmware version needs to be no less than 1.6.0.
2169
2170
2171 = 7. Trouble Shooting =
2172 )))
2173
2174 (((
2175 (((
2176 == 7.1 Downlink doesn't work, how to solve it? ==
2177
2178
2179 )))
2180 )))
2181
2182 (((
2183 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2184 )))
2185
2186 (((
2187
2188
2189 == 7.2 Have trouble to upload image. ==
2190
2191
2192 )))
2193
2194 (((
2195 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2196 )))
2197
2198 (((
2199
2200
2201 == 7.3 Why I can't join TTN in US915 /AU915 bands? ==
2202
2203
2204 )))
2205
2206 (((
2207 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2208 )))
2209
2210
2211 = 8. Order Info =
2212
2213
2214 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2215
2216 (% style="color:#4f81bd" %)**XXX:**
2217
2218 * (% style="color:red" %)**EU433**(%%):  LT with frequency bands EU433
2219 * (% style="color:red" %)**EU868**(%%):  LT with frequency bands EU868
2220 * (% style="color:red" %)**KR920**(%%):  LT with frequency bands KR920
2221 * (% style="color:red" %)**CN470**(%%):  LT with frequency bands CN470
2222 * (% style="color:red" %)**AS923**(%%):  LT with frequency bands AS923
2223 * (% style="color:red" %)**AU915**(%%):  LT with frequency bands AU915
2224 * (% style="color:red" %)**US915**(%%):  LT with frequency bands US915
2225 * (% style="color:red" %)**IN865**(%%):  LT with frequency bands IN865
2226 * (% style="color:red" %)**CN779**(%%):  LT with frequency bands CN779
2227
2228 = 9. Packing Info =
2229
2230
2231 **Package Includes**:
2232
2233 * LT-22222-L I/O Controller x 1
2234 * Stick Antenna for LoRa RF part x 1
2235 * Bracket for controller x1
2236 * Program cable x 1
2237
2238 **Dimension and weight**:
2239
2240 * Device Size: 13.5 x 7 x 3 cm
2241 * Device Weight: 105g
2242 * Package Size / pcs : 14.5 x 8 x 5 cm
2243 * Weight / pcs : 170g
2244
2245 = 10. Support =
2246
2247
2248 * (((
2249 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.
2250 )))
2251 * (((
2252 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]]
2253
2254
2255
2256 )))
2257
2258 = 11. Reference​​​​​ =
2259
2260
2261 * 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]]
2262 * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2263 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]