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Version 82.7 by Xiaoling on 2022/06/20 11:17
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14
15
16
17 = 1.Introduction =
18
19 == 1.1 What is LT Series I/O Controller ==
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 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, smartphone detection, building automation, and so on.
29 )))
30
31 (((
32 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
33 )))
34
35 (((
36 The use environment includes:
37 )))
38
39 (((
40 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.
41 )))
42
43 (((
44 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
45 )))
46
47 (((
48 [[image:1653295757274-912.png]]
49
50
51 )))
52
53
54 == 1.2  Specifications ==
55
56 (((
57
58
59 **Hardware System:**
60 )))
61
62 * (((
63 STM32L072CZT6 MCU
64 )))
65 * (((
66 SX1276/78 Wireless Chip 
67 )))
68 * (((
69 (((
70 Power Consumption:
71 )))
72
73 * (((
74 Idle: 4mA@12v
75 )))
76 * (((
77 20dB Transmit: 34mA@12v
78 )))
79 )))
80
81 (((
82
83
84 **Interface for Model: LT22222-L:**
85 )))
86
87 * (((
88 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
89 )))
90 * (((
91 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
92 )))
93 * (((
94 2 x Relay Output (5A@250VAC / 30VDC)
95 )))
96 * (((
97 2 x 0~~20mA Analog Input (res:0.01mA)
98 )))
99 * (((
100 2 x 0~~30V Analog Input (res:0.01v)
101 )))
102 * (((
103 Power Input 7~~ 24V DC. 
104 )))
105
106 (((
107
108
109 **LoRa Spec:**
110 )))
111
112 * (((
113 (((
114 Frequency Range:
115 )))
116
117 * (((
118 Band 1 (HF): 862 ~~ 1020 Mhz
119 )))
120 * (((
121 Band 2 (LF): 410 ~~ 528 Mhz
122 )))
123 )))
124 * (((
125 168 dB maximum link budget.
126 )))
127 * (((
128 +20 dBm - 100 mW constant RF output vs.
129 )))
130 * (((
131 +14 dBm high efficiency PA.
132 )))
133 * (((
134 Programmable bit rate up to 300 kbps.
135 )))
136 * (((
137 High sensitivity: down to -148 dBm.
138 )))
139 * (((
140 Bullet-proof front end: IIP3 = -12.5 dBm.
141 )))
142 * (((
143 Excellent blocking immunity.
144 )))
145 * (((
146 Low RX current of 10.3 mA, 200 nA register retention.
147 )))
148 * (((
149 Fully integrated synthesizer with a resolution of 61 Hz.
150 )))
151 * (((
152 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
153 )))
154 * (((
155 Built-in bit synchronizer for clock recovery.
156 )))
157 * (((
158 Preamble detection.
159 )))
160 * (((
161 127 dB Dynamic Range RSSI.
162 )))
163 * (((
164 Automatic RF Sense and CAD with ultra-fast AFC.
165 )))
166 * (((
167 Packet engine up to 256 bytes with CRC.
168
169
170
171
172 )))
173
174 == 1.3 Features ==
175
176 * LoRaWAN Class A & Class C protocol
177 * Optional Customized LoRa Protocol
178 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
179 * AT Commands to change parameters
180 * Remote configure parameters via LoRa Downlink
181 * Firmware upgradable via program port
182 * Counting
183
184
185
186
187 == 1.4  Applications ==
188
189 * Smart Buildings & Home Automation
190 * Logistics and Supply Chain Management
191 * Smart Metering
192 * Smart Agriculture
193 * Smart Cities
194 * Smart Factory
195
196
197
198
199 == 1.5 Hardware Variants ==
200
201 (% border="1" style="background-color:#f7faff; width:500px" %)
202 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
203 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
204 * 2 x Digital Input (Bi-direction)
205 * 2 x Digital Output
206 * 2 x Relay Output (5A@250VAC / 30VDC)
207 * 2 x 0~~20mA Analog Input (res:0.01mA)
208 * 2 x 0~~30V Analog Input (res:0.01v)
209 * 1 x Counting Port
210 )))
211
212
213
214 = 2. Power ON Device =
215
216 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.
217
218 (((
219 PWR will on when device is properly powered.
220 )))
221
222 [[image:1653297104069-180.png]]
223
224
225
226 = 3. Operation Mode =
227
228 == 3.1 How it works? ==
229
230 (((
231 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 **TX LED** will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. **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. 
232 )))
233
234 (((
235 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.
236 )))
237
238
239 == 3.2 Example to join LoRaWAN network ==
240
241 (((
242 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. 
243 )))
244
245 [[image:image-20220523172350-1.png||height="266" width="864"]]
246
247
248 (((
249 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:
250 )))
251
252 (((
253 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
254 )))
255
256 (((
257 Each LT is shipped with a sticker with the default device EUI as below:
258 )))
259
260 [[image:1653297924498-393.png]]
261
262
263 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
264
265 Add APP EUI in the application.
266
267 [[image:1653297955910-247.png||height="321" width="716"]]
268
269
270 Add APP KEY and DEV EUI
271
272 [[image:1653298023685-319.png]]
273
274
275 (((
276 (% 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.
277 )))
278
279 [[image:1653298044601-602.png||height="405" width="709"]]
280
281
282
283 == 3.3 Uplink Payload ==
284
285 There are five working modes + one interrupt mode on LT for different type application:
286
287 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
288 * **MOD2**: Double DI Counting + DO + RO
289 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
290 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
291 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
292 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
293
294 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
295
296 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
297
298 [[image:image-20220523174024-3.png]]
299
300 (((
301
302
303 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
304 )))
305
306 [[image:image-20220523174254-4.png]]
307
308 * RO is for relay. ROx=1 : close，ROx=0 always open.
309 * DI is for digital input. DIx=1: high or float, DIx=0: low.
310 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
311
312 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
313
314 For example if payload is: [[image:image-20220523175847-2.png]]
315
316
317 **The value for the interface is:  **
318
319 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
320
321 AVI2 channel voltage is 0x04AC/1000=1.196V
322
323 ACI1 channel current is 0x1310/1000=4.880mA
324
325 ACI2 channel current is 0x1300/1000=4.864mA
326
327 The last byte 0xAA= 10101010(B) means
328
329 * [1] RO1 relay channel is close and the RO1 LED is ON.
330 * [0] RO2 relay channel is open and RO2 LED is OFF;
331
332 **LT22222-L:**
333
334 * [1] DI2 channel is high input and DI2 LED is ON;
335 * [0] DI1 channel is low input;
336
337 * [0] DO3 channel output state
338 ** DO3 is float in case no load between DO3 and V+.;
339 ** DO3 is high in case there is load between DO3 and V+.
340 ** DO3 LED is off in both case
341 * [1] DO2 channel output is low and DO2 LED is ON.
342 * [0] DO1 channel output state
343 ** DO1 is float in case no load between DO1 and V+.;
344 ** DO1 is high in case there is load between DO1 and V+.
345 ** DO1 LED is off in both case
346
347 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
348
349
350 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
351
352 (((
353 Total : 11 bytes payload
354 )))
355
356 [[image:image-20220523180452-3.png]]
357
358
359 (((
360 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
361 )))
362
363 [[image:image-20220523180506-4.png]]
364
365 * RO is for relay. ROx=1 : close，ROx=0 always open.
366 * FIRST: Indicate this is the first packet after join network.
367 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
368
369 (((
370 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
371 )))
372
373 (((
374
375
376 **To use counting mode, please run:**
377 )))
378
379 (% class="box infomessage" %)
380 (((
381 (((
382 **AT+MOD=2**
383 )))
384 )))
385
386 (% class="box infomessage" %)
387 (((
388 (((
389 **ATZ**
390 )))
391 )))
392
393 (((
394
395
396 (% style="color:#4f81bd" %)**AT Commands for counting:**
397 )))
398
399 (((
400 **For LT22222-L:**
401 )))
402
403 (% class="box infomessage" %)
404 (((
405 (((
406 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
407 )))
408 )))
409
410 (% class="box infomessage" %)
411 (((
412 (((
413 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
414 )))
415 )))
416
417 (% class="box infomessage" %)
418 (((
419 (((
420 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
421 )))
422 )))
423
424 (% class="box infomessage" %)
425 (((
426 (((
427 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
428 )))
429 )))
430
431 (% class="box infomessage" %)
432 (((
433 (((
434 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
435 )))
436 )))
437
438 (% class="box infomessage" %)
439 (((
440 (((
441 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
442 )))
443 )))
444
445
446
447 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
448
449 **LT22222-L**: This mode the DI1 is used as a counting pin.
450
451 [[image:image-20220523181246-5.png]]
452
453 (((
454 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
455 )))
456
457 [[image:image-20220523181301-6.png]]
458
459 * RO is for relay. ROx=1 : close，ROx=0 always open.
460 * FIRST: Indicate this is the first packet after join network.
461 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
462
463 (((
464 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
465 )))
466
467 (((
468 **To use counting mode, please run:**
469 )))
470
471 (% class="box infomessage" %)
472 (((
473 (((
474 **AT+MOD=3**
475 )))
476 )))
477
478 (% class="box infomessage" %)
479 (((
480 (((
481 **ATZ**
482 )))
483 )))
484
485 (((
486 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
487 )))
488
489
490
491 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
492
493
494 **LT22222-L**: This mode the DI1 is used as a counting pin.
495
496 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.
497
498 [[image:image-20220523181903-8.png]]
499
500
501 (((
502 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
503 )))
504
505 [[image:image-20220523181727-7.png]]
506
507 * RO is for relay. ROx=1 : close，ROx=0 always open.
508 * FIRST: Indicate this is the first packet after join network.
509 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
510
511 (((
512 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
513 )))
514
515 (((
516
517
518 **To use this mode, please run:**
519 )))
520
521 (% class="box infomessage" %)
522 (((
523 (((
524 **AT+MOD=4**
525 )))
526 )))
527
528 (% class="box infomessage" %)
529 (((
530 (((
531 **ATZ**
532 )))
533 )))
534
535 (((
536
537 )))
538
539 (((
540 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
541 )))
542
543 (((
544
545
546 **Plus below command for AVI1 Counting:**
547 )))
548
549 (% class="box infomessage" %)
550 (((
551 (((
552 **AT+SETCNT=3,60   (set AVI Count to 60)**
553 )))
554 )))
555
556 (% class="box infomessage" %)
557 (((
558 (((
559 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
560 )))
561 )))
562
563 (% class="box infomessage" %)
564 (((
565 (((
566 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
567 )))
568 )))
569
570 (% class="box infomessage" %)
571 (((
572 (((
573 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
574 )))
575 )))
576
577
578
579 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
580
581
582 **LT22222-L**: This mode the DI1 is used as a counting pin.
583
584 [[image:image-20220523182334-9.png]]
585
586 (((
587
588
589 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
590 )))
591
592 * RO is for relay. ROx=1 : close，ROx=0 always open.
593 * FIRST: Indicate this is the first packet after join network.
594 * (((
595 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
596 )))
597
598 (((
599 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
600 )))
601
602 (((
603
604
605 **To use this mode, please run:**
606 )))
607
608 (% class="box infomessage" %)
609 (((
610 (((
611 **AT+MOD=5**
612 )))
613 )))
614
615 (% class="box infomessage" %)
616 (((
617 (((
618 **ATZ**
619 )))
620 )))
621
622 (((
623 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
624 )))
625
626
627
628 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
629
630
631 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
632
633 For example, if user has configured below commands:
634
635 * **AT+MOD=1 ** **~-~->** The normal working mode
636 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
637
638 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
639
640 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
641 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.**
642
643 **AT Command to set Trigger Condition**:
644
645 (% style="color:#4f81bd" %)**Trigger base on voltage**:
646
647 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
648
649 **Example:**
650
651 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)
652
653 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
654
655
656
657 (% style="color:#4f81bd" %)**Trigger base on current**:
658
659 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
660
661 **Example:**
662
663 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
664
665
666
667 (% style="color:#4f81bd" %)**Trigger base on DI status**:
668
669 DI status trigger Flag.
670
671 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
672
673
674 **Example:**
675
676 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
677
678
679 **Downlink Command to set Trigger Condition:**
680
681 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
682
683 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
684
685 AA: Code for this downlink Command:
686
687 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
688
689 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
690
691 yy2 yy2: AC1 or AV1 high limit.
692
693 yy3 yy3: AC2 or AV2 low limit.
694
695 Yy4 yy4: AC2 or AV2 high limit.
696
697
698 **Example1**: AA 00 13 88 00 00 00 00 00 00
699
700 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
701
702
703 **Example2**: AA 02 01 00
704
705 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
706
707
708
709 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
710
711 MOD6 Payload : total 11 bytes payload
712
713 [[image:image-20220524085923-1.png]]
714
715
716 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
717
718 [[image:image-20220524090106-2.png]]
719
720 * Each bits shows if the corresponding trigger has been configured.
721
722 **Example:**
723
724 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
725
726
727 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
728
729 [[image:image-20220524090249-3.png]]
730
731 * Each bits shows which status has been trigger on this uplink.
732
733 **Example:**
734
735 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
736
737
738 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
739
740 [[image:image-20220524090456-4.png]]
741
742 * Each bits shows which status has been trigger on this uplink.
743
744 **Example:**
745
746 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
747
748 00000101: Means both DI1 and DI2 trigger are enabled.
749
750
751 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
752
753 Downlink command to poll MOD6 status:
754
755 **AB 06**
756
757 When device got this command, it will send the MOD6 payload.
758
759
760
761 === 3.3.7 Payload Decoder ===
762
763 (((
764
765
766 **Decoder for TTN/loraserver/ChirpStack**: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/]]
767
768
769 )))
770
771
772 == 3.4 ​Configure LT via AT or Downlink ==
773
774 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
775
776 (((
777 There are two kinds of Commands:
778 )))
779
780 * (% style="color:#4f81bd" %)**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]]
781
782 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
783
784 === 3.4.1 Common Commands ===
785
786 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]]
787
788
789
790 === 3.4.2 Sensor related commands ===
791
792 ==== 3.4.2.1 Set Transmit Interval ====
793
794 Set device uplink interval.
795
796 * AT Command:
797
798 (% class="box infomessage" %)
799 (((
800 **AT+TDC=N **
801 )))
802
803 **Example: **AT+TDC=30000. Means set interval to 30 seconds
804
805
806 * Downlink Payload (prefix 0x01):
807
808 (% class="box infomessage" %)
809 (((
810 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
811 )))
812
813
814
815 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
816
817 Set work mode.
818
819 * AT Command:
820
821 (% class="box infomessage" %)
822 (((
823 **AT+MOD=N  **
824 )))
825
826 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
827
828
829 * Downlink Payload (prefix 0x0A):
830
831 (% class="box infomessage" %)
832 (((
833 **0x0A aa     ~/~/ Same as AT+MOD=aa**
834 )))
835
836
837
838 ==== 3.4.2.3 Poll an uplink ====
839
840 * AT Command:
841
842 There is no AT Command to poll uplink
843
844
845 * Downlink Payload (prefix 0x08):
846
847 (% class="box infomessage" %)
848 (((
849 **0x08 FF     ~/~/ Poll an uplink,**
850 )))
851
852 **Example**: 0x08FF, ask device to send an Uplink
853
854
855
856 ==== 3.4.2.4 Enable Trigger Mode ====
857
858 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
859
860 * AT Command:
861
862 (% class="box infomessage" %)
863 (((
864 **AT+ADDMOD6=1 or 0**
865 )))
866
867 1: Enable Trigger Mode
868
869 0: Disable Trigger Mode
870
871
872 * Downlink Payload (prefix 0x0A 06):
873
874 (% class="box infomessage" %)
875 (((
876 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
877 )))
878
879
880
881 ==== 3.4.2.5 Poll trigger settings ====
882
883 Poll trigger settings,
884
885 * AT Command:
886
887 There is no AT Command for this feature.
888
889
890 * Downlink Payload (prefix 0x AB 06):
891
892 (% class="box infomessage" %)
893 (((
894 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
895 )))
896
897
898
899 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
900
901 Enable Disable DI1/DI2/DI2 as trigger,
902
903 * AT Command:
904
905 (% class="box infomessage" %)
906 (((
907 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
908 )))
909
910
911 **Example:**
912
913 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
914
915 * Downlink Payload (prefix 0xAA 02):
916
917 (% class="box infomessage" %)
918 (((
919 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
920 )))
921
922
923
924 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
925
926 Set DI1 or DI3(for LT-33222-L) trigger.
927
928 * AT Command:
929
930 (% class="box infomessage" %)
931 (((
932 **AT+TRIG1=a,b**
933 )))
934
935 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
936
937 b : delay timing.
938
939
940 **Example:**
941
942 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
943
944
945 * Downlink Payload (prefix 0x09 01 ):
946
947 (% class="box infomessage" %)
948 (((
949 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
950 )))
951
952
953
954 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
955
956 Set DI2 trigger.
957
958 * AT Command:
959
960 (% class="box infomessage" %)
961 (((
962 **AT+TRIG2=a,b**
963 )))
964
965 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
966
967 b : delay timing.
968
969
970 **Example:**
971
972 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
973
974
975 * Downlink Payload (prefix 0x09 02 ):
976
977 (% class="box infomessage" %)
978 (((
979 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
980 )))
981
982
983
984 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
985
986 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
987
988 * AT Command:
989
990 (% class="box infomessage" %)
991 (((
992 **AT+ACLIM. **
993 )))
994
995
996 * Downlink Payload (prefix 0xAA 01 ):
997
998 (% class="box infomessage" %)
999 (((
1000 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1001 )))
1002
1003
1004
1005 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1006
1007 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1008
1009 * AT Command:
1010
1011 (% class="box infomessage" %)
1012 (((
1013 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1014 )))
1015
1016
1017 * Downlink Payload (prefix 0xAA 00 ):
1018
1019 (% class="box infomessage" %)
1020 (((
1021 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1022 )))
1023
1024
1025
1026 ==== 3.4.2.11 Trigger – Set minimum interval ====
1027
1028 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1029
1030 * AT Command:
1031
1032 (% class="box infomessage" %)
1033 (((
1034 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1035 )))
1036
1037
1038 * Downlink Payload (prefix 0xAC ):
1039
1040 (% class="box infomessage" %)
1041 (((
1042 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1043 )))
1044
1045
1046
1047 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1048
1049 * AT Command:
1050
1051 There is no AT Command to control Digital Output
1052
1053
1054 * Downlink Payload (prefix 0x02):
1055
1056 (% class="box infomessage" %)
1057 (((
1058 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1059 )))
1060
1061 (((
1062 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1063 )))
1064
1065 (((
1066 01: Low,  00: High ,  11: No action
1067 )))
1068
1069 [[image:image-20220524092754-5.png]]
1070
1071 (((
1072 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1073 )))
1074
1075 (((
1076 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1077 )))
1078
1079
1080
1081 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1082
1083 * AT Command:
1084
1085 There is no AT Command to control Digital Output
1086
1087
1088 * Downlink Payload (prefix 0xA9):
1089
1090 (% class="box infomessage" %)
1091 (((
1092 (((
1093 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1094 )))
1095 )))
1096
1097 This is to control the digital output time of DO pin. Include four bytes:
1098
1099 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1100
1101 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1102
1103 01: DO pins will change back to original state after timeout.
1104
1105 00: DO pins will change to an inverter state after timeout 
1106
1107
1108 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1109
1110 [[image:image-20220524093238-6.png]]
1111
1112
1113 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1114
1115 [[image:image-20220524093328-7.png]]
1116
1117
1118 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1119
1120 [[image:image-20220524093351-8.png]]
1121
1122
1123 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1124
1125 Latching time. Unit: ms
1126
1127 Device will upload a packet if downlink code executes successfully.
1128
1129
1130 **Example payload:**
1131
1132 **~1. A9 01 01 01 01 07 D0**
1133
1134 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1135
1136 **2. A9 01 00 01 11 07 D0**
1137
1138 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1139
1140 **3. A9 00 00 00 00 07 D0**
1141
1142 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1143
1144 **4. A9 00 11 01 00 07 D0**
1145
1146 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
1147
1148
1149
1150 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1151
1152 * AT Command:
1153
1154 There is no AT Command to control Relay Output
1155
1156
1157 * Downlink Payload (prefix 0x03):
1158
1159 (% class="box infomessage" %)
1160 (((
1161 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1162 )))
1163
1164 (((
1165 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1166 )))
1167
1168 (((
1169 01: Close ,  00: Open , 11: No action
1170 )))
1171
1172 (((
1173 [[image:image-20220524093724-9.png]]
1174 )))
1175
1176 Device will upload a packet if downlink code executes successfully.
1177
1178
1179
1180 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1181
1182 * AT Command:
1183
1184 There is no AT Command to control Relay Output
1185
1186
1187 * Downlink Payload (prefix 0x05):
1188
1189 (% class="box infomessage" %)
1190 (((
1191 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1192 )))
1193
1194 This is to control the relay output time of relay. Include four bytes:
1195
1196 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1197
1198 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1199
1200 01: Relays will change back to original state after timeout.
1201
1202 00: Relays will change to an inverter state after timeout
1203
1204
1205 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1206
1207 [[image:image-20220524093831-10.png]]
1208
1209
1210 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1211
1212 Device will upload a packet if downlink code executes successfully.
1213
1214
1215 **Example payload:**
1216
1217 **~1. 05 01 11 07 D0**
1218
1219 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1220
1221 **2. 05 01 10 07 D0**
1222
1223 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1224
1225 **3. 05 00 01 07 D0**
1226
1227 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1228
1229 **4. 05 00 00 07 D0**
1230
1231 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1232
1233
1234
1235 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1236
1237 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1238
1239 * AT Command:
1240
1241 (% class="box infomessage" %)
1242 (((
1243 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1244 )))
1245
1246
1247 * Downlink Payload (prefix 0xA5):
1248
1249 (% class="box infomessage" %)
1250 (((
1251 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1252 )))
1253
1254
1255
1256 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1257
1258 * AT Command:
1259
1260 (% class="box infomessage" %)
1261 (((
1262 **AT+SETCNT=aa,(bb cc dd ee) **
1263 )))
1264
1265 aa: 1: Set count1,
1266
1267 2: Set count2,
1268
1269 3: Set AV1 count
1270
1271 Bb cc dd ee: number to be set
1272
1273
1274 * Downlink Payload (prefix 0xA8):
1275
1276 (% class="box infomessage" %)
1277 (((
1278 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1279 )))
1280
1281
1282
1283 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1284
1285 Clear counting for counting mode
1286
1287 * AT Command:
1288
1289 (% class="box infomessage" %)
1290 (((
1291 **AT+CLRCOUNT ~/~/ clear all counting**
1292 )))
1293
1294 * Downlink Payload (prefix 0xA6):
1295
1296 (% class="box infomessage" %)
1297 (((
1298 **0x A6 01     ~/~/ clear all counting,**
1299 )))
1300
1301
1302
1303 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1304
1305 * AT Command:
1306
1307 (% class="box infomessage" %)
1308 (((
1309 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1310 )))
1311
1312 * Downlink Payload (prefix 0xA7):
1313
1314 (% class="box infomessage" %)
1315 (((
1316 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1317 )))
1318
1319 (((
1320 range: aa bb cc:0 to 16777215,  (unit:second)
1321
1322
1323 )))
1324
1325
1326 == 3.5 Integrate with Mydevice ==
1327
1328 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:
1329
1330 (((
1331 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1332 )))
1333
1334 (((
1335 (% 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:
1336 )))
1337
1338 [[image:1653356737703-362.png||height="232" width="732"]]
1339
1340 [[image:image-20220524094641-11.png||height="390" width="723"]]
1341
1342
1343 [[image:image-20220524094641-12.png||height="402" width="718"]]
1344
1345
1346 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1347
1348 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1349
1350 Search under The things network
1351
1352 [[image:1653356838789-523.png||height="337" width="740"]]
1353
1354
1355
1356 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1357
1358 [[image:image-20220524094909-1.png||height="335" width="729"]]
1359
1360
1361 [[image:image-20220524094909-2.png||height="337" width="729"]]
1362
1363
1364 [[image:image-20220524094909-3.png||height="338" width="727"]]
1365
1366
1367 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1368
1369
1370 [[image:image-20220524094909-5.png||height="341" width="734"]]
1371
1372
1373
1374 == 3.6 Interface Detail ==
1375
1376 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1377
1378 Support NPN Type sensor
1379
1380 [[image:1653356991268-289.png]]
1381
1382
1383
1384 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1385
1386 (((
1387 The DI port of LT-22222-L can support NPN or PNP output sensor.
1388 )))
1389
1390 (((
1391 (((
1392 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
1393 )))
1394 )))
1395
1396 [[image:1653357170703-587.png]]
1397
1398 (((
1399 (((
1400 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1401 )))
1402 )))
1403
1404 (((
1405
1406 )))
1407
1408 (((
1409 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1410 )))
1411
1412 (((
1413 This type of sensor will output a low signal GND when active.
1414 )))
1415
1416 * (((
1417 Connect sensor’s output to DI1-
1418 )))
1419 * (((
1420 Connect sensor’s VCC to DI1+.
1421 )))
1422
1423 (((
1424 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1425 )))
1426
1427 (((
1428 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1429 )))
1430
1431 (((
1432 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.
1433 )))
1434
1435 (((
1436
1437 )))
1438
1439 (((
1440 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1441 )))
1442
1443 (((
1444 This type of sensor will output a high signal (example 24v) when active.
1445 )))
1446
1447 * (((
1448 Connect sensor’s output to DI1+
1449 )))
1450 * (((
1451 Connect sensor’s GND DI1-.
1452 )))
1453
1454 (((
1455 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1456 )))
1457
1458 (((
1459 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1460 )))
1461
1462 (((
1463 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.
1464 )))
1465
1466 (((
1467
1468 )))
1469
1470 (((
1471 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1472 )))
1473
1474 (((
1475 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1476 )))
1477
1478 * (((
1479 Connect sensor’s output to DI1+ with a serial 50K resistor
1480 )))
1481 * (((
1482 Connect sensor’s GND DI1-.
1483 )))
1484
1485 (((
1486 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1487 )))
1488
1489 (((
1490 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1491 )))
1492
1493 (((
1494 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.
1495 )))
1496
1497
1498
1499 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1500
1501 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1502
1503 [[image:1653357531600-905.png]]
1504
1505
1506
1507 === 3.6.4 Analog Input Interface ===
1508
1509 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:
1510
1511
1512 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1513
1514 [[image:1653357592296-182.png]]
1515
1516 Example to connect a 4~~20mA sensor
1517
1518 We take the wind speed sensor as an example for reference only.
1519
1520
1521 **Specifications of the wind speed sensor:**
1522
1523 Red:  12~~24v
1524
1525 Yellow:  4~~20mA
1526
1527 Black:  GND
1528
1529
1530 **Connection diagram:**
1531
1532 [[image:1653357640609-758.png]]
1533
1534 [[image:1653357648330-671.png||height="155" width="733"]]
1535
1536
1537
1538 === 3.6.5 Relay Output ===
1539
1540 (((
1541 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:
1542 )))
1543
1544 [[image:image-20220524100215-9.png]]
1545
1546 [[image:image-20220524100215-10.png||height="382" width="723"]]
1547
1548
1549
1550 == 3.7 LEDs Indicators ==
1551
1552 [[image:image-20220524100748-11.png]]
1553
1554
1555 = 4. Use AT Command =
1556
1557 == 4.1 Access AT Command ==
1558
1559 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.
1560
1561 [[image:1653358238933-385.png]]
1562
1563
1564 (((
1565 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:
1566 )))
1567
1568 [[image:1653358355238-883.png]]
1569
1570
1571 (((
1572 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/]]
1573 )))
1574
1575 (((
1576 AT+<CMD>?        : Help on <CMD>
1577 )))
1578
1579 (((
1580 AT+<CMD>         : Run <CMD>
1581 )))
1582
1583 (((
1584 AT+<CMD>=<value> : Set the value
1585 )))
1586
1587 (((
1588 AT+<CMD>=?       : Get the value
1589 )))
1590
1591 (((
1592 ATZ: Trig a reset of the MCU
1593 )))
1594
1595 (((
1596 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1597 )))
1598
1599 (((
1600 AT+DEUI: Get or Set the Device EUI
1601 )))
1602
1603 (((
1604 AT+DADDR: Get or Set the Device Address
1605 )))
1606
1607 (((
1608 AT+APPKEY: Get or Set the Application Key
1609 )))
1610
1611 (((
1612 AT+NWKSKEY: Get or Set the Network Session Key
1613 )))
1614
1615 (((
1616 AT+APPSKEY: Get or Set the Application Session Key
1617 )))
1618
1619 (((
1620 AT+APPEUI: Get or Set the Application EUI
1621 )))
1622
1623 (((
1624 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1625 )))
1626
1627 (((
1628 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1629 )))
1630
1631 (((
1632 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1633 )))
1634
1635 (((
1636 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1637 )))
1638
1639 (((
1640 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1641 )))
1642
1643 (((
1644 AT+RX2FQ: Get or Set the Rx2 window frequency
1645 )))
1646
1647 (((
1648 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1649 )))
1650
1651 (((
1652 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1653 )))
1654
1655 (((
1656 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1657 )))
1658
1659 (((
1660 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1661 )))
1662
1663 (((
1664 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1665 )))
1666
1667 (((
1668 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1669 )))
1670
1671 (((
1672 AT+NWKID: Get or Set the Network ID
1673 )))
1674
1675 (((
1676 AT+FCU: Get or Set the Frame Counter Uplink
1677 )))
1678
1679 (((
1680 AT+FCD: Get or Set the Frame Counter Downlink
1681 )))
1682
1683 (((
1684 AT+CLASS: Get or Set the Device Class
1685 )))
1686
1687 (((
1688 AT+JOIN: Join network
1689 )))
1690
1691 (((
1692 AT+NJS: Get OTAA Join Status
1693 )))
1694
1695 (((
1696 AT+SENDB: Send hexadecimal data along with the application port
1697 )))
1698
1699 (((
1700 AT+SEND: Send text data along with the application port
1701 )))
1702
1703 (((
1704 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1705 )))
1706
1707 (((
1708 AT+RECV: Print last received data in raw format
1709 )))
1710
1711 (((
1712 AT+VER: Get current image version and Frequency Band
1713 )))
1714
1715 (((
1716 AT+CFM: Get or Set the confirmation mode (0-1)
1717 )))
1718
1719 (((
1720 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1721 )))
1722
1723 (((
1724 AT+SNR: Get the SNR of the last received packet
1725 )))
1726
1727 (((
1728 AT+RSSI: Get the RSSI of the last received packet
1729 )))
1730
1731 (((
1732 AT+TDC: Get or set the application data transmission interval in ms
1733 )))
1734
1735 (((
1736 AT+PORT: Get or set the application port
1737 )))
1738
1739 (((
1740 AT+DISAT: Disable AT commands
1741 )))
1742
1743 (((
1744 AT+PWORD: Set password, max 9 digits
1745 )))
1746
1747 (((
1748 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1749 )))
1750
1751 (((
1752 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1753 )))
1754
1755 (((
1756 AT+CFG: Print all settings
1757
1758
1759 )))
1760
1761
1762
1763 == 4.2 Common AT Command Sequence ==
1764
1765 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1766
1767 (((
1768
1769
1770 **If device has not joined network yet:**
1771 )))
1772
1773 (((
1774 (% style="background-color:#dcdcdc" %)123456
1775 )))
1776
1777 (((
1778 (% style="background-color:#dcdcdc" %)AT+FDR
1779 )))
1780
1781 (((
1782 (% style="background-color:#dcdcdc" %)123456
1783 )))
1784
1785 (((
1786 (% style="background-color:#dcdcdc" %)AT+NJM=0
1787 )))
1788
1789 (((
1790 (% style="background-color:#dcdcdc" %)ATZ
1791 )))
1792
1793
1794 (((
1795 **If device already joined network:**
1796 )))
1797
1798 (((
1799 (% style="background-color:#dcdcdc" %)AT+NJM=0
1800 )))
1801
1802 (((
1803 (% style="background-color:#dcdcdc" %)ATZ
1804
1805
1806 )))
1807
1808
1809
1810 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1811
1812 (((
1813
1814
1815 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1816 )))
1817
1818 (((
1819 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1820 )))
1821
1822 (((
1823 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1824 )))
1825
1826 (((
1827 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1828 )))
1829
1830 (((
1831 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1832 )))
1833
1834 (((
1835 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1836 )))
1837
1838 (((
1839 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1840 )))
1841
1842 (((
1843 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1844 )))
1845
1846 (((
1847 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1848 )))
1849
1850 (((
1851 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1852 )))
1853
1854 (((
1855 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1856 )))
1857
1858 (((
1859 (% 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.
1860 )))
1861
1862 (((
1863 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1864
1865
1866 )))
1867
1868 (((
1869 (% style="color:red" %)**Note:**
1870 )))
1871
1872 (((
1873 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1874 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1875 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?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
1876 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
1877 )))
1878
1879 (((
1880 [[image:1653359097980-169.png||height="188" width="729"]]
1881 )))
1882
1883 (((
1884
1885 )))
1886
1887
1888 === 4.2.3 Change to Class A ===
1889
1890 If sensor JOINED
1891 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1892 ATZ
1893
1894
1895 = 5. FAQ =
1896
1897 == 5.1 How to upgrade the image? ==
1898
1899
1900 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1901
1902 * Support new features
1903 * For bug fix
1904 * Change LoRaWAN bands.
1905
1906 Below shows the hardware connection for how to upload an image to the LT:
1907
1908 [[image:1653359603330-121.png]]
1909
1910
1911 (((
1912 (% 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]].
1913 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1914 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1915
1916
1917 (% style="color:blue" %)**For LT-22222-L**(%%):
1918 Hold down the PRO button and then momentarily press the RST reset button and the **DO1 led** will change from OFF to ON. When **DO1 LED** is on, it means the device is in download mode.
1919 )))
1920
1921 [[image:image-20220524103407-12.png]]
1922
1923 [[image:image-20220524103429-13.png]]
1924
1925 [[image:image-20220524104033-15.png]]
1926
1927
1928 (% 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:
1929
1930 [[image:1653360054704-518.png||height="186" width="745"]]
1931
1932
1933 (((
1934 (((
1935
1936
1937 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1938 )))
1939 )))
1940
1941 (((
1942 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1943 )))
1944
1945 (((
1946
1947
1948 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1949 )))
1950
1951 (((
1952 (((
1953 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1954 )))
1955 )))
1956
1957 (((
1958 (((
1959 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1960
1961
1962 )))
1963 )))
1964
1965 (((
1966 (% style="color:#4f81bd" %)**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.
1967 )))
1968
1969 (((
1970 [[image:1653360231087-571.png||height="401" width="727"]]
1971 )))
1972
1973 (((
1974 (% 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.
1975 )))
1976
1977
1978 (((
1979 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1980 )))
1981
1982 (((
1983 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1984 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1985 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1986 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1987 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1988 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1989 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1990 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1991 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1992 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1993 )))
1994
1995
1996 (((
1997 As shown in below:
1998 )))
1999
2000 [[image:1653360498588-932.png||height="485" width="726"]]
2001
2002
2003 == 5.4 Can I see counting event in Serial? ==
2004
2005 (((
2006 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.
2007
2008
2009 == 5.5 Can i use point to point communication for LT-22222-L? ==
2010
2011 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2012 )))
2013
2014 (((
2015 == 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2016
2017 If the device is not shut down, but directly powered off.
2018
2019 It will default that this is a power-off state.
2020
2021 In modes 2 to 5, DO RO status and pulse count are saved in flash.
2022
2023 After restart, the status before power failure will be read from flash.
2024
2025 = 6. Trouble Shooting =
2026 )))
2027
2028 (((
2029 (((
2030 == 6.1 Downlink doesn’t work, how to solve it? ==
2031 )))
2032 )))
2033
2034 (((
2035 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2036 )))
2037
2038 (((
2039
2040
2041 == 6.2 Have trouble to upload image. ==
2042 )))
2043
2044 (((
2045 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2046 )))
2047
2048 (((
2049
2050
2051 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2052 )))
2053
2054 (((
2055 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2056 )))
2057
2058
2059
2060 = 7. Order Info =
2061
2062
2063 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2064
2065
2066 (% style="color:#4f81bd" %)**XXX:**
2067
2068 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2069 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2070 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2071 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2072 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2073 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2074 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2075 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2076 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2077
2078 = 8. Packing Info =
2079
2080
2081 **Package Includes**:
2082
2083 * LT-22222-L I/O Controller x 1
2084 * Stick Antenna for LoRa RF part x 1
2085 * Bracket for controller x1
2086 * Program cable x 1
2087
2088 **Dimension and weight**:
2089
2090 * Device Size: 13.5 x 7 x 3 cm
2091 * Device Weight: 105g
2092 * Package Size / pcs : 14.5 x 8 x 5 cm
2093 * Weight / pcs : 170g
2094
2095 = 9. Support =
2096
2097 * (((
2098 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.
2099 )))
2100 * (((
2101 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]]
2102 )))
2103
2104 = 10. Reference​​​​​ =
2105
2106 * 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]]
2107 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2108 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2109 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]