Version 77.114 by Xiaoling on 2022/06/10 09:37
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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 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.
23 )))
24
25 (((
26 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.
27 )))
28
29 (((
30 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
31 )))
32
33 (((
34 The use environment includes:
35 )))
36
37 (((
38 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.
39 )))
40
41 (((
42 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
43 )))
44
45 (((
46 [[image:1653295757274-912.png]]
47
48
49 )))
50
51 == 1.2  Specifications ==
52
53 (((
54
55
56 **Hardware System:**
57 )))
58
59 * (((
60 STM32L072CZT6 MCU
61 )))
62 * (((
63 SX1276/78 Wireless Chip 
64 )))
65 * (((
66 (((
67 Power Consumption:
68 )))
69
70 * (((
71 Idle: 4mA@12v
72 )))
73 * (((
74 20dB Transmit: 34mA@12v
75 )))
76 )))
77
78 (((
79
80
81 **Interface for Model: LT22222-L:**
82 )))
83
84 * (((
85 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
86 )))
87 * (((
88 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
89 )))
90 * (((
91 2 x Relay Output (5A@250VAC / 30VDC)
92 )))
93 * (((
94 2 x 0~~20mA Analog Input (res:0.01mA)
95 )))
96 * (((
97 2 x 0~~30V Analog Input (res:0.01v)
98 )))
99 * (((
100 Power Input 7~~ 24V DC. 
101 )))
102
103 (((
104
105
106 **LoRa Spec:**
107 )))
108
109 * (((
110 (((
111 Frequency Range:
112 )))
113
114 * (((
115 Band 1 (HF): 862 ~~ 1020 Mhz
116 )))
117 * (((
118 Band 2 (LF): 410 ~~ 528 Mhz
119 )))
120 )))
121 * (((
122 168 dB maximum link budget.
123 )))
124 * (((
125 +20 dBm - 100 mW constant RF output vs.
126 )))
127 * (((
128 +14 dBm high efficiency PA.
129 )))
130 * (((
131 Programmable bit rate up to 300 kbps.
132 )))
133 * (((
134 High sensitivity: down to -148 dBm.
135 )))
136 * (((
137 Bullet-proof front end: IIP3 = -12.5 dBm.
138 )))
139 * (((
140 Excellent blocking immunity.
141 )))
142 * (((
143 Low RX current of 10.3 mA, 200 nA register retention.
144 )))
145 * (((
146 Fully integrated synthesizer with a resolution of 61 Hz.
147 )))
148 * (((
149 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
150 )))
151 * (((
152 Built-in bit synchronizer for clock recovery.
153 )))
154 * (((
155 Preamble detection.
156 )))
157 * (((
158 127 dB Dynamic Range RSSI.
159 )))
160 * (((
161 Automatic RF Sense and CAD with ultra-fast AFC.
162 )))
163 * (((
164 Packet engine up to 256 bytes with CRC.
165 )))
166
167
168
169 == 1.3 Features ==
170
171 * LoRaWAN Class A & Class C protocol
172 * Optional Customized LoRa Protocol
173 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
174 * AT Commands to change parameters
175 * Remote configure parameters via LoRa Downlink
176 * Firmware upgradable via program port
177 * Counting
178
179
180
181 == 1.4  Applications ==
182
183 * Smart Buildings & Home Automation
184 * Logistics and Supply Chain Management
185 * Smart Metering
186 * Smart Agriculture
187 * Smart Cities
188 * Smart Factory
189
190
191
192 == 1.5 Hardware Variants ==
193
194 (% border="1" style="background-color:#f7faff; width:500px" %)
195 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
196 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
197 * 2 x Digital Input (Bi-direction)
198 * 2 x Digital Output
199 * 2 x Relay Output (5A@250VAC / 30VDC)
200 * 2 x 0~~20mA Analog Input (res:0.01mA)
201 * 2 x 0~~30V Analog Input (res:0.01v)
202 * 1 x Counting Port
203 )))
204
205
206 = 2. Power ON Device =
207
208 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.
209
210 (((
211 PWR will on when device is properly powered.
212 )))
213
214 [[image:1653297104069-180.png]]
215
216
217
218 = 3. Operation Mode =
219
220 == 3.1 How it works? ==
221
222 (((
223 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. 
224 )))
225
226 (((
227 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.
228 )))
229
230
231 == 3.2 Example to join LoRaWAN network ==
232
233 (((
234 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. 
235 )))
236
237 [[image:image-20220523172350-1.png||height="266" width="864"]]
238
239
240 (((
241 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:
242 )))
243
244 (((
245 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
246 )))
247
248 (((
249 Each LT is shipped with a sticker with the default device EUI as below:
250 )))
251
252 [[image:1653297924498-393.png]]
253
254
255 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
256
257 Add APP EUI in the application.
258
259 [[image:1653297955910-247.png||height="321" width="716"]]
260
261
262 Add APP KEY and DEV EUI
263
264 [[image:1653298023685-319.png]]
265
266
267 (((
268 (% 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.
269 )))
270
271 [[image:1653298044601-602.png||height="405" width="709"]]
272
273
274
275 == 3.3 Uplink Payload ==
276
277 There are five working modes + one interrupt mode on LT for different type application:
278
279 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
280 * **MOD2**: Double DI Counting + DO + RO
281 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
282 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
283 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
284 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
285
286
287 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
288
289 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
290
291 [[image:image-20220523174024-3.png]]
292
293 (((
294
295
296 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
297 )))
298
299 [[image:image-20220523174254-4.png]]
300
301 * RO is for relay. ROx=1 : close，ROx=0 always open.
302 * DI is for digital input. DIx=1: high or float, DIx=0: low.
303 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
304
305 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
306
307 For example if payload is: [[image:image-20220523175847-2.png]]
308
309
310 **The value for the interface is:  **
311
312 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
313
314 AVI2 channel voltage is 0x04AC/1000=1.196V
315
316 ACI1 channel current is 0x1310/1000=4.880mA
317
318 ACI2 channel current is 0x1300/1000=4.864mA
319
320 The last byte 0xAA= 10101010(B) means
321
322 * [1] RO1 relay channel is close and the RO1 LED is ON.
323 * [0] RO2 relay channel is open and RO2 LED is OFF;
324
325 **LT22222-L:**
326
327 * [1] DI2 channel is high input and DI2 LED is ON;
328 * [0] DI1 channel is low input;
329
330 * [0] DO3 channel output state
331 ** DO3 is float in case no load between DO3 and V+.;
332 ** DO3 is high in case there is load between DO3 and V+.
333 ** DO3 LED is off in both case
334 * [1] DO2 channel output is low and DO2 LED is ON.
335 * [0] DO1 channel output state
336 ** DO1 is float in case no load between DO1 and V+.;
337 ** DO1 is high in case there is load between DO1 and V+.
338 ** DO1 LED is off in both case
339
340
341 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
342
343
344 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
345
346 (((
347 Total : 11 bytes payload
348 )))
349
350 [[image:image-20220523180452-3.png]]
351
352
353 (((
354 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
355 )))
356
357 [[image:image-20220523180506-4.png]]
358
359 * RO is for relay. ROx=1 : close，ROx=0 always open.
360 * FIRST: Indicate this is the first packet after join network.
361 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
362
363 (((
364 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
365 )))
366
367 (((
368
369
370 **To use counting mode, please run:**
371 )))
372
373 (% class="box infomessage" %)
374 (((
375 (((
376 **AT+MOD=2**
377 )))
378 )))
379
380 (% class="box infomessage" %)
381 (((
382 (((
383 **ATZ**
384 )))
385 )))
386
387 (((
388
389
390 (% style="color:#4f81bd" %)**AT Commands for counting:**
391 )))
392
393 (((
394 **For LT22222-L:**
395 )))
396
397 (% class="box infomessage" %)
398 (((
399 (((
400 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
401 )))
402 )))
403
404 (% class="box infomessage" %)
405 (((
406 (((
407 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
408 )))
409 )))
410
411 (% class="box infomessage" %)
412 (((
413 (((
414 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
415 )))
416 )))
417
418 (% class="box infomessage" %)
419 (((
420 (((
421 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
422 )))
423 )))
424
425 (% class="box infomessage" %)
426 (((
427 (((
428 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
429 )))
430 )))
431
432 (% class="box infomessage" %)
433 (((
434 (((
435 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
436 )))
437 )))
438
439
440
441 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
442
443 **LT22222-L**: This mode the DI1 is used as a counting pin.
444
445 [[image:image-20220523181246-5.png]]
446
447 (((
448 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
449 )))
450
451 [[image:image-20220523181301-6.png]]
452
453 * RO is for relay. ROx=1 : close，ROx=0 always open.
454 * FIRST: Indicate this is the first packet after join network.
455 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
456
457 (((
458 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
459 )))
460
461 (((
462 **To use counting mode, please run:**
463 )))
464
465 (% class="box infomessage" %)
466 (((
467 (((
468 **AT+MOD=3**
469 )))
470 )))
471
472 (% class="box infomessage" %)
473 (((
474 (((
475 **ATZ**
476 )))
477 )))
478
479 (((
480 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
481
482
483 )))
484
485
486 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
487
488
489 **LT22222-L**: This mode the DI1 is used as a counting pin.
490
491 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.
492
493 [[image:image-20220523181903-8.png]]
494
495
496 (((
497 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
498 )))
499
500 [[image:image-20220523181727-7.png]]
501
502 * RO is for relay. ROx=1 : close，ROx=0 always open.
503 * FIRST: Indicate this is the first packet after join network.
504 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
505
506 (((
507 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
508 )))
509
510 (((
511
512
513 **To use this mode, please run:**
514 )))
515
516 (% class="box infomessage" %)
517 (((
518 (((
519 **AT+MOD=4**
520 )))
521 )))
522
523 (% class="box infomessage" %)
524 (((
525 (((
526 **ATZ**
527 )))
528 )))
529
530 (((
531
532 )))
533
534 (((
535 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
536 )))
537
538 (((
539
540
541 **Plus below command for AVI1 Counting:**
542 )))
543
544 (% class="box infomessage" %)
545 (((
546 (((
547 **AT+SETCNT=3,60   (set AVI Count to 60)**
548 )))
549 )))
550
551 (% class="box infomessage" %)
552 (((
553 (((
554 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
555 )))
556 )))
557
558 (% class="box infomessage" %)
559 (((
560 (((
561 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
562 )))
563 )))
564
565 (% class="box infomessage" %)
566 (((
567 (((
568 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
569 )))
570 )))
571
572
573
574 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
575
576
577 **LT22222-L**: This mode the DI1 is used as a counting pin.
578
579 [[image:image-20220523182334-9.png]]
580
581 (((
582
583
584 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
585 )))
586
587 * RO is for relay. ROx=1 : close，ROx=0 always open.
588 * FIRST: Indicate this is the first packet after join network.
589 * (((
590 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
591 )))
592
593 (((
594 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
595 )))
596
597 (((
598
599
600 **To use this mode, please run:**
601 )))
602
603 (% class="box infomessage" %)
604 (((
605 (((
606 **AT+MOD=5**
607 )))
608 )))
609
610 (% class="box infomessage" %)
611 (((
612 (((
613 **ATZ**
614 )))
615 )))
616
617 (((
618 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
619 )))
620
621
622
623 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
624
625
626 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
627
628 For example, if user has configured below commands:
629
630 * **AT+MOD=1 ** **~-~->** The normal working mode
631 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
632
633 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
634
635 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
636 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.**
637
638 **AT Command to set Trigger Condition**:
639
640 (% style="color:#4f81bd" %)**Trigger base on voltage**:
641
642 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
643
644 **Example:**
645
646 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)
647
648 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
649
650
651
652 (% style="color:#4f81bd" %)**Trigger base on current**:
653
654 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
655
656 **Example:**
657
658 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
659
660
661
662 (% style="color:#4f81bd" %)**Trigger base on DI status**:
663
664 DI status trigger Flag.
665
666 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
667
668
669 **Example:**
670
671 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
672
673
674 **Downlink Command to set Trigger Condition:**
675
676 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
677
678 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
679
680 AA: Code for this downlink Command:
681
682 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
683
684 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
685
686 yy2 yy2: AC1 or AV1 high limit.
687
688 yy3 yy3: AC2 or AV2 low limit.
689
690 Yy4 yy4: AC2 or AV2 high limit.
691
692
693 **Example1**: AA 00 13 88 00 00 00 00 00 00
694
695 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
696
697
698 **Example2**: AA 02 01 00
699
700 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
701
702
703
704 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
705
706 MOD6 Payload : total 11 bytes payload
707
708 [[image:image-20220524085923-1.png]]
709
710
711 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
712
713 [[image:image-20220524090106-2.png]]
714
715 * Each bits shows if the corresponding trigger has been configured.
716
717 **Example:**
718
719 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
720
721
722 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
723
724 [[image:image-20220524090249-3.png]]
725
726 * Each bits shows which status has been trigger on this uplink.
727
728 **Example:**
729
730 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
731
732
733 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
734
735 [[image:image-20220524090456-4.png]]
736
737 * Each bits shows which status has been trigger on this uplink.
738
739 **Example:**
740
741 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
742
743 00000101: Means both DI1 and DI2 trigger are enabled.
744
745
746 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
747
748 Downlink command to poll MOD6 status:
749
750 **AB 06**
751
752 When device got this command, it will send the MOD6 payload.
753
754
755
756 === 3.3.7 Payload Decoder ===
757
758 (((
759
760
761 **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/]]
762
763
764 )))
765
766
767
768 == 3.4 ​Configure LT via AT or Downlink ==
769
770 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
771
772 (((
773 There are two kinds of Commands:
774 )))
775
776 * (% 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]]
777
778 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
779
780 === 3.4.1 Common Commands ===
781
782 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]]
783
784
785
786 === 3.4.2 Sensor related commands ===
787
788 ==== 3.4.2.1 Set Transmit Interval ====
789
790 Set device uplink interval.
791
792 * AT Command:
793
794 (% class="box infomessage" %)
795 (((
796 **AT+TDC=N **
797 )))
798
799 **Example: **AT+TDC=30000. Means set interval to 30 seconds
800
801
802 * Downlink Payload (prefix 0x01):
803
804 (% class="box infomessage" %)
805 (((
806 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
807 )))
808
809
810
811 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
812
813 Set work mode.
814
815 * AT Command:
816
817 (% class="box infomessage" %)
818 (((
819 **AT+MOD=N  **
820 )))
821
822 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
823
824
825 * Downlink Payload (prefix 0x0A):
826
827 (% class="box infomessage" %)
828 (((
829 **0x0A aa     ~/~/ Same as AT+MOD=aa**
830 )))
831
832
833
834 ==== 3.4.2.3 Poll an uplink ====
835
836 * AT Command:
837
838 There is no AT Command to poll uplink
839
840
841 * Downlink Payload (prefix 0x08):
842
843 (% class="box infomessage" %)
844 (((
845 **0x08 FF     ~/~/ Poll an uplink,**
846 )))
847
848 **Example**: 0x08FF, ask device to send an Uplink
849
850
851
852 ==== 3.4.2.4 Enable Trigger Mode ====
853
854 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
855
856 * AT Command:
857
858 (% class="box infomessage" %)
859 (((
860 **AT+ADDMOD6=1 or 0**
861 )))
862
863 1: Enable Trigger Mode
864
865 0: Disable Trigger Mode
866
867
868 * Downlink Payload (prefix 0x0A 06):
869
870 (% class="box infomessage" %)
871 (((
872 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
873 )))
874
875
876
877 ==== 3.4.2.5 Poll trigger settings ====
878
879 Poll trigger settings,
880
881 * AT Command:
882
883 There is no AT Command for this feature.
884
885
886 * Downlink Payload (prefix 0x AB 06):
887
888 (% class="box infomessage" %)
889 (((
890 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
891 )))
892
893
894
895 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
896
897 Enable Disable DI1/DI2/DI2 as trigger,
898
899 * AT Command:
900
901 (% class="box infomessage" %)
902 (((
903 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
904 )))
905
906
907 **Example:**
908
909 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
910
911 * Downlink Payload (prefix 0xAA 02):
912
913 (% class="box infomessage" %)
914 (((
915 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
916 )))
917
918
919
920 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
921
922 Set DI1 or DI3(for LT-33222-L) trigger.
923
924 * AT Command:
925
926 (% class="box infomessage" %)
927 (((
928 **AT+TRIG1=a,b**
929 )))
930
931 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
932
933 b : delay timing.
934
935
936 **Example:**
937
938 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
939
940
941 * Downlink Payload (prefix 0x09 01 ):
942
943 (% class="box infomessage" %)
944 (((
945 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
946 )))
947
948
949
950 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
951
952 Set DI2 trigger.
953
954 * AT Command:
955
956 (% class="box infomessage" %)
957 (((
958 **AT+TRIG2=a,b**
959 )))
960
961 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
962
963 b : delay timing.
964
965
966 **Example:**
967
968 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
969
970
971 * Downlink Payload (prefix 0x09 02 ):
972
973 (% class="box infomessage" %)
974 (((
975 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
976 )))
977
978
979
980 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
981
982 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
983
984 * AT Command:
985
986 (% class="box infomessage" %)
987 (((
988 **AT+ACLIM. **
989 )))
990
991
992 * Downlink Payload (prefix 0xAA 01 ):
993
994 (% class="box infomessage" %)
995 (((
996 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
997 )))
998
999
1000
1001 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1002
1003 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1004
1005 * AT Command:
1006
1007 (% class="box infomessage" %)
1008 (((
1009 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1010 )))
1011
1012
1013 * Downlink Payload (prefix 0xAA 00 ):
1014
1015 (% class="box infomessage" %)
1016 (((
1017 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1018 )))
1019
1020
1021
1022 ==== 3.4.2.11 Trigger – Set minimum interval ====
1023
1024 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1025
1026 * AT Command:
1027
1028 (% class="box infomessage" %)
1029 (((
1030 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1031 )))
1032
1033
1034 * Downlink Payload (prefix 0xAC ):
1035
1036 (% class="box infomessage" %)
1037 (((
1038 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1039 )))
1040
1041
1042
1043 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1044
1045 * AT Command:
1046
1047 There is no AT Command to control Digital Output
1048
1049
1050 * Downlink Payload (prefix 0x02):
1051
1052 (% class="box infomessage" %)
1053 (((
1054 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1055 )))
1056
1057 (((
1058 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1059 )))
1060
1061 (((
1062 01: Low,  00: High ,  11: No action
1063 )))
1064
1065 [[image:image-20220524092754-5.png]]
1066
1067 (((
1068 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1069 )))
1070
1071 (((
1072 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1073 )))
1074
1075
1076
1077 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1078
1079 * AT Command:
1080
1081 There is no AT Command to control Digital Output
1082
1083
1084 * Downlink Payload (prefix 0xA9):
1085
1086 (% class="box infomessage" %)
1087 (((
1088 (((
1089 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1090 )))
1091 )))
1092
1093 This is to control the digital output time of DO pin. Include four bytes:
1094
1095 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1096
1097 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1098
1099 01: DO pins will change back to original state after timeout.
1100
1101 00: DO pins will change to an inverter state after timeout 
1102
1103
1104 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1105
1106 [[image:image-20220524093238-6.png]]
1107
1108
1109 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1110
1111 [[image:image-20220524093328-7.png]]
1112
1113
1114 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1115
1116 [[image:image-20220524093351-8.png]]
1117
1118
1119 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1120
1121 Latching time. Unit: ms
1122
1123 Device will upload a packet if downlink code executes successfully.
1124
1125
1126 **Example payload:**
1127
1128 **~1. A9 01 01 01 01 07 D0**
1129
1130 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1131
1132 **2. A9 01 00 01 11 07 D0**
1133
1134 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1135
1136 **3. A9 00 00 00 00 07 D0**
1137
1138 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1139
1140 **4. A9 00 11 01 00 07 D0**
1141
1142 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
1143
1144
1145
1146 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1147
1148 * AT Command:
1149
1150 There is no AT Command to control Relay Output
1151
1152
1153 * Downlink Payload (prefix 0x03):
1154
1155 (% class="box infomessage" %)
1156 (((
1157 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1158 )))
1159
1160 (((
1161 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1162 )))
1163
1164 (((
1165 01: Close ,  00: Open , 11: No action
1166 )))
1167
1168 (((
1169 [[image:image-20220524093724-9.png]]
1170 )))
1171
1172 Device will upload a packet if downlink code executes successfully.
1173
1174
1175
1176 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1177
1178 * AT Command:
1179
1180 There is no AT Command to control Relay Output
1181
1182
1183 * Downlink Payload (prefix 0x05):
1184
1185 (% class="box infomessage" %)
1186 (((
1187 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1188 )))
1189
1190 This is to control the relay output time of relay. Include four bytes:
1191
1192 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1193
1194 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1195
1196 01: Relays will change back to original state after timeout.
1197
1198 00: Relays will change to an inverter state after timeout
1199
1200
1201 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1202
1203 [[image:image-20220524093831-10.png]]
1204
1205
1206 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1207
1208 Device will upload a packet if downlink code executes successfully.
1209
1210
1211 **Example payload:**
1212
1213 **~1. 05 01 11 07 D0**
1214
1215 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1216
1217 **2. 05 01 10 07 D0**
1218
1219 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1220
1221 **3. 05 00 01 07 D0**
1222
1223 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1224
1225 **4. 05 00 00 07 D0**
1226
1227 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1228
1229
1230
1231 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1232
1233 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1234
1235 * AT Command:
1236
1237 (% class="box infomessage" %)
1238 (((
1239 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1240 )))
1241
1242
1243 * Downlink Payload (prefix 0xA5):
1244
1245 (% class="box infomessage" %)
1246 (((
1247 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1248 )))
1249
1250
1251
1252 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1253
1254 * AT Command:
1255
1256 (% class="box infomessage" %)
1257 (((
1258 **AT+SETCNT=aa,(bb cc dd ee) **
1259 )))
1260
1261 aa: 1: Set count1,
1262
1263 2: Set count2,
1264
1265 3: Set AV1 count
1266
1267 Bb cc dd ee: number to be set
1268
1269
1270 * Downlink Payload (prefix 0xA8):
1271
1272 (% class="box infomessage" %)
1273 (((
1274 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1275 )))
1276
1277
1278
1279 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1280
1281 Clear counting for counting mode
1282
1283 * AT Command:
1284
1285 (% class="box infomessage" %)
1286 (((
1287 **AT+CLRCOUNT ~/~/ clear all counting**
1288 )))
1289
1290 * Downlink Payload (prefix 0xA6):
1291
1292 (% class="box infomessage" %)
1293 (((
1294 **0x A6 01     ~/~/ clear all counting,**
1295 )))
1296
1297
1298
1299 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1300
1301 * AT Command:
1302
1303 (% class="box infomessage" %)
1304 (((
1305 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1306 )))
1307
1308 * Downlink Payload (prefix 0xA7):
1309
1310 (% class="box infomessage" %)
1311 (((
1312 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1313 )))
1314
1315 (((
1316 range: aa bb cc:0 to 16777215,  (unit:second)
1317
1318
1319 )))
1320
1321
1322 == 3.5 Integrate with Mydevice ==
1323
1324 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:
1325
1326 (((
1327 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1328 )))
1329
1330 (((
1331 (% 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:
1332 )))
1333
1334 [[image:1653356737703-362.png||height="232" width="732"]]
1335
1336 [[image:image-20220524094641-11.png||height="390" width="723"]]
1337
1338
1339 [[image:image-20220524094641-12.png||height="402" width="718"]]
1340
1341
1342 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1343
1344 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1345
1346 Search under The things network
1347
1348 [[image:1653356838789-523.png||height="337" width="740"]]
1349
1350
1351
1352 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1353
1354 [[image:image-20220524094909-1.png||height="335" width="729"]]
1355
1356
1357 [[image:image-20220524094909-2.png||height="337" width="729"]]
1358
1359
1360 [[image:image-20220524094909-3.png||height="338" width="727"]]
1361
1362
1363 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1364
1365
1366 [[image:image-20220524094909-5.png||height="341" width="734"]]
1367
1368
1369
1370 == 3.6 Interface Detail ==
1371
1372 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1373
1374 Support NPN Type sensor
1375
1376 [[image:1653356991268-289.png]]
1377
1378
1379
1380 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1381
1382 (((
1383 The DI port of LT-22222-L can support NPN or PNP output sensor.
1384 )))
1385
1386 (((
1387 (((
1388 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
1389 )))
1390 )))
1391
1392 [[image:1653357170703-587.png]]
1393
1394 (((
1395 (((
1396 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1397 )))
1398 )))
1399
1400 (((
1401
1402 )))
1403
1404 (((
1405 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1406 )))
1407
1408 (((
1409 This type of sensor will output a low signal GND when active.
1410 )))
1411
1412 * (((
1413 Connect sensor’s output to DI1-
1414 )))
1415 * (((
1416 Connect sensor’s VCC to DI1+.
1417 )))
1418
1419 (((
1420 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1421 )))
1422
1423 (((
1424 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1425 )))
1426
1427 (((
1428 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.
1429 )))
1430
1431 (((
1432
1433 )))
1434
1435 (((
1436 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1437 )))
1438
1439 (((
1440 This type of sensor will output a high signal (example 24v) when active.
1441 )))
1442
1443 * (((
1444 Connect sensor’s output to DI1+
1445 )))
1446 * (((
1447 Connect sensor’s GND DI1-.
1448 )))
1449
1450 (((
1451 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1452 )))
1453
1454 (((
1455 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1456 )))
1457
1458 (((
1459 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.
1460 )))
1461
1462 (((
1463
1464 )))
1465
1466 (((
1467 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1468 )))
1469
1470 (((
1471 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1472 )))
1473
1474 * (((
1475 Connect sensor’s output to DI1+ with a serial 50K resistor
1476 )))
1477 * (((
1478 Connect sensor’s GND DI1-.
1479 )))
1480
1481 (((
1482 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1483 )))
1484
1485 (((
1486 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1487 )))
1488
1489 (((
1490 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.
1491 )))
1492
1493
1494
1495 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1496
1497 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1498
1499 [[image:1653357531600-905.png]]
1500
1501
1502
1503 === 3.6.4 Analog Input Interface ===
1504
1505 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:
1506
1507
1508 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1509
1510 [[image:1653357592296-182.png]]
1511
1512 Example to connect a 4~~20mA sensor
1513
1514 We take the wind speed sensor as an example for reference only.
1515
1516
1517 **Specifications of the wind speed sensor:**
1518
1519 Red:  12~~24v
1520
1521 Yellow:  4~~20mA
1522
1523 Black:  GND
1524
1525
1526 **Connection diagram:**
1527
1528 [[image:1653357640609-758.png]]
1529
1530 [[image:1653357648330-671.png||height="155" width="733"]]
1531
1532
1533
1534 === 3.6.5 Relay Output ===
1535
1536 (((
1537 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:
1538 )))
1539
1540 [[image:image-20220524100215-9.png]]
1541
1542 [[image:image-20220524100215-10.png||height="382" width="723"]]
1543
1544
1545
1546 == 3.7 LEDs Indicators ==
1547
1548 [[image:image-20220524100748-11.png]]
1549
1550
1551 = 4. Use AT Command =
1552
1553 == 4.1 Access AT Command ==
1554
1555 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.
1556
1557 [[image:1653358238933-385.png]]
1558
1559
1560 (((
1561 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:
1562 )))
1563
1564 [[image:1653358355238-883.png]]
1565
1566
1567 (((
1568 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/]]
1569 )))
1570
1571 (((
1572 AT+<CMD>?        : Help on <CMD>
1573 )))
1574
1575 (((
1576 AT+<CMD>         : Run <CMD>
1577 )))
1578
1579 (((
1580 AT+<CMD>=<value> : Set the value
1581 )))
1582
1583 (((
1584 AT+<CMD>=?       : Get the value
1585 )))
1586
1587 (((
1588 ATZ: Trig a reset of the MCU
1589 )))
1590
1591 (((
1592 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1593 )))
1594
1595 (((
1596 AT+DEUI: Get or Set the Device EUI
1597 )))
1598
1599 (((
1600 AT+DADDR: Get or Set the Device Address
1601 )))
1602
1603 (((
1604 AT+APPKEY: Get or Set the Application Key
1605 )))
1606
1607 (((
1608 AT+NWKSKEY: Get or Set the Network Session Key
1609 )))
1610
1611 (((
1612 AT+APPSKEY: Get or Set the Application Session Key
1613 )))
1614
1615 (((
1616 AT+APPEUI: Get or Set the Application EUI
1617 )))
1618
1619 (((
1620 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1621 )))
1622
1623 (((
1624 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1625 )))
1626
1627 (((
1628 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1629 )))
1630
1631 (((
1632 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1633 )))
1634
1635 (((
1636 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1637 )))
1638
1639 (((
1640 AT+RX2FQ: Get or Set the Rx2 window frequency
1641 )))
1642
1643 (((
1644 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1645 )))
1646
1647 (((
1648 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1649 )))
1650
1651 (((
1652 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1653 )))
1654
1655 (((
1656 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1657 )))
1658
1659 (((
1660 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1661 )))
1662
1663 (((
1664 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1665 )))
1666
1667 (((
1668 AT+NWKID: Get or Set the Network ID
1669 )))
1670
1671 (((
1672 AT+FCU: Get or Set the Frame Counter Uplink
1673 )))
1674
1675 (((
1676 AT+FCD: Get or Set the Frame Counter Downlink
1677 )))
1678
1679 (((
1680 AT+CLASS: Get or Set the Device Class
1681 )))
1682
1683 (((
1684 AT+JOIN: Join network
1685 )))
1686
1687 (((
1688 AT+NJS: Get OTAA Join Status
1689 )))
1690
1691 (((
1692 AT+SENDB: Send hexadecimal data along with the application port
1693 )))
1694
1695 (((
1696 AT+SEND: Send text data along with the application port
1697 )))
1698
1699 (((
1700 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1701 )))
1702
1703 (((
1704 AT+RECV: Print last received data in raw format
1705 )))
1706
1707 (((
1708 AT+VER: Get current image version and Frequency Band
1709 )))
1710
1711 (((
1712 AT+CFM: Get or Set the confirmation mode (0-1)
1713 )))
1714
1715 (((
1716 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1717 )))
1718
1719 (((
1720 AT+SNR: Get the SNR of the last received packet
1721 )))
1722
1723 (((
1724 AT+RSSI: Get the RSSI of the last received packet
1725 )))
1726
1727 (((
1728 AT+TDC: Get or set the application data transmission interval in ms
1729 )))
1730
1731 (((
1732 AT+PORT: Get or set the application port
1733 )))
1734
1735 (((
1736 AT+DISAT: Disable AT commands
1737 )))
1738
1739 (((
1740 AT+PWORD: Set password, max 9 digits
1741 )))
1742
1743 (((
1744 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1745 )))
1746
1747 (((
1748 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1749 )))
1750
1751 (((
1752 AT+CFG: Print all settings
1753
1754
1755 )))
1756
1757
1758
1759 == 4.2 Common AT Command Sequence ==
1760
1761 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1762
1763 (((
1764
1765
1766 **If device has not joined network yet:**
1767 )))
1768
1769 (((
1770 (% style="background-color:#dcdcdc" %)123456
1771 )))
1772
1773 (((
1774 (% style="background-color:#dcdcdc" %)AT+FDR
1775 )))
1776
1777 (((
1778 (% style="background-color:#dcdcdc" %)123456
1779 )))
1780
1781 (((
1782 (% style="background-color:#dcdcdc" %)AT+NJM=0
1783 )))
1784
1785 (((
1786 (% style="background-color:#dcdcdc" %)ATZ
1787 )))
1788
1789
1790 (((
1791 **If device already joined network:**
1792 )))
1793
1794 (((
1795 (% style="background-color:#dcdcdc" %)AT+NJM=0
1796 )))
1797
1798 (((
1799 (% style="background-color:#dcdcdc" %)ATZ
1800
1801
1802 )))
1803
1804
1805
1806 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1807
1808 (((
1809
1810
1811 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1812 )))
1813
1814 (((
1815 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1816 )))
1817
1818 (((
1819 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1820 )))
1821
1822 (((
1823 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1824 )))
1825
1826 (((
1827 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1828 )))
1829
1830 (((
1831 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1832 )))
1833
1834 (((
1835 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1836 )))
1837
1838 (((
1839 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1840 )))
1841
1842 (((
1843 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1844 )))
1845
1846 (((
1847 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1848 )))
1849
1850 (((
1851 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1852 )))
1853
1854 (((
1855 (% 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.
1856 )))
1857
1858 (((
1859 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1860
1861
1862 )))
1863
1864 (((
1865 (% style="color:red" %)**Note:**
1866 )))
1867
1868 (((
1869 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1870 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1871 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.
1872 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
1873 )))
1874
1875 (((
1876 [[image:1653359097980-169.png||height="188" width="729"]]
1877 )))
1878
1879 (((
1880
1881 )))
1882
1883
1884 === 4.2.3 Change to Class A ===
1885
1886 If sensor JOINED
1887 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1888 ATZ
1889
1890
1891 = 5. FAQ =
1892
1893 == 5.1 How to upgrade the image? ==
1894
1895
1896 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1897
1898 * Support new features
1899 * For bug fix
1900 * Change LoRaWAN bands.
1901
1902 Below shows the hardware connection for how to upload an image to the LT:
1903
1904 [[image:1653359603330-121.png]]
1905
1906
1907 (((
1908 (% 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]].
1909 (% 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/]].
1910 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1911
1912
1913 (% style="color:blue" %)**For LT-22222-L**(%%):
1914 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.
1915 )))
1916
1917 [[image:image-20220524103407-12.png]]
1918
1919 [[image:image-20220524103429-13.png]]
1920
1921 [[image:image-20220524104033-15.png]]
1922
1923
1924 (% 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:
1925
1926 [[image:1653360054704-518.png||height="186" width="745"]]
1927
1928
1929 (((
1930 (((
1931
1932
1933 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1934 )))
1935 )))
1936
1937 (((
1938 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1939 )))
1940
1941 (((
1942
1943
1944 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1945 )))
1946
1947 (((
1948 (((
1949 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1950 )))
1951 )))
1952
1953 (((
1954 (((
1955 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1956
1957
1958 )))
1959 )))
1960
1961 (((
1962 (% 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.
1963 )))
1964
1965 (((
1966 [[image:1653360231087-571.png||height="401" width="727"]]
1967 )))
1968
1969 (((
1970 (% 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.
1971 )))
1972
1973
1974 (((
1975 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1976 )))
1977
1978 (((
1979 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1980 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1981 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1982 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1983 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1984 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1985 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1986 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1987 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1988 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1989 )))
1990
1991
1992 (((
1993 As shown in below:
1994 )))
1995
1996 [[image:1653360498588-932.png||height="485" width="726"]]
1997
1998
1999 == 5.4 Can I see counting event in Serial? ==
2000
2001 (((
2002 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.
2003
2004
2005 == 5.5 Can i use point to point communication for LT-22222-L? ==
2006
2007 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2008 )))
2009
2010 (((
2011
2012
2013 = 6. Trouble Shooting =
2014 )))
2015
2016 (((
2017 (((
2018 == 6.1 Downlink doesn’t work, how to solve it? ==
2019 )))
2020 )))
2021
2022 (((
2023 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2024 )))
2025
2026 (((
2027
2028
2029 == 6.2 Have trouble to upload image. ==
2030 )))
2031
2032 (((
2033 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2034 )))
2035
2036 (((
2037
2038
2039 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2040 )))
2041
2042 (((
2043 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2044 )))
2045
2046
2047
2048 = 7. Order Info =
2049
2050
2051 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2052
2053
2054 (% style="color:#4f81bd" %)**XXX:**
2055
2056 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2057 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2058 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2059 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2060 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2061 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2062 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2063 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2064 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2065
2066 = 8. Packing Info =
2067
2068
2069 **Package Includes**:
2070
2071 * LT-22222-L I/O Controller x 1
2072 * Stick Antenna for LoRa RF part x 1
2073 * Bracket for controller x1
2074 * Program cable x 1
2075
2076 **Dimension and weight**:
2077
2078 * Device Size: 13.5 x 7 x 3 cm
2079 * Device Weight: 105g
2080 * Package Size / pcs : 14.5 x 8 x 5 cm
2081 * Weight / pcs : 170g
2082
2083 = 9. Support =
2084
2085 * (((
2086 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.
2087 )))
2088 * (((
2089 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]]
2090 )))
2091
2092 = 10. Reference​​​​​ =
2093
2094 * 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]]
2095 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2096 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2097 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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