Version 77.110 by Xiaoling on 2022/06/10 09:36
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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 **Interface for Model: LT22222-L:**
80 )))
81
82 * (((
83 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
84 )))
85 * (((
86 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
87 )))
88 * (((
89 2 x Relay Output (5A@250VAC / 30VDC)
90 )))
91 * (((
92 2 x 0~~20mA Analog Input (res:0.01mA)
93 )))
94 * (((
95 2 x 0~~30V Analog Input (res:0.01v)
96 )))
97 * (((
98 Power Input 7~~ 24V DC. 
99 )))
100
101 (((
102 **LoRa Spec:**
103 )))
104
105 * (((
106 (((
107 Frequency Range:
108 )))
109
110 * (((
111 Band 1 (HF): 862 ~~ 1020 Mhz
112 )))
113 * (((
114 Band 2 (LF): 410 ~~ 528 Mhz
115 )))
116 )))
117 * (((
118 168 dB maximum link budget.
119 )))
120 * (((
121 +20 dBm - 100 mW constant RF output vs.
122 )))
123 * (((
124 +14 dBm high efficiency PA.
125 )))
126 * (((
127 Programmable bit rate up to 300 kbps.
128 )))
129 * (((
130 High sensitivity: down to -148 dBm.
131 )))
132 * (((
133 Bullet-proof front end: IIP3 = -12.5 dBm.
134 )))
135 * (((
136 Excellent blocking immunity.
137 )))
138 * (((
139 Low RX current of 10.3 mA, 200 nA register retention.
140 )))
141 * (((
142 Fully integrated synthesizer with a resolution of 61 Hz.
143 )))
144 * (((
145 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
146 )))
147 * (((
148 Built-in bit synchronizer for clock recovery.
149 )))
150 * (((
151 Preamble detection.
152 )))
153 * (((
154 127 dB Dynamic Range RSSI.
155 )))
156 * (((
157 Automatic RF Sense and CAD with ultra-fast AFC.
158 )))
159 * (((
160 Packet engine up to 256 bytes with CRC.
161
162
163 )))
164
165
166
167
168 == 1.3 Features ==
169
170 * LoRaWAN Class A & Class C protocol
171 * Optional Customized LoRa Protocol
172 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
173 * AT Commands to change parameters
174 * Remote configure parameters via LoRa Downlink
175 * Firmware upgradable via program port
176 * Counting
177
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
193 == 1.5 Hardware Variants ==
194
195 (% border="1" style="background-color:#f7faff; width:500px" %)
196 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
197 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
198 * 2 x Digital Input (Bi-direction)
199 * 2 x Digital Output
200 * 2 x Relay Output (5A@250VAC / 30VDC)
201 * 2 x 0~~20mA Analog Input (res:0.01mA)
202 * 2 x 0~~30V Analog Input (res:0.01v)
203 * 1 x Counting Port
204 )))
205
206
207
208 = 2. Power ON Device =
209
210 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.
211
212 (((
213 PWR will on when device is properly powered.
214 )))
215
216 [[image:1653297104069-180.png]]
217
218
219
220 = 3. Operation Mode =
221
222 == 3.1 How it works? ==
223
224 (((
225 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. 
226 )))
227
228 (((
229 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.
230 )))
231
232
233 == 3.2 Example to join LoRaWAN network ==
234
235 (((
236 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. 
237 )))
238
239 [[image:image-20220523172350-1.png||height="266" width="864"]]
240
241
242 (((
243 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:
244 )))
245
246 (((
247 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
248 )))
249
250 (((
251 Each LT is shipped with a sticker with the default device EUI as below:
252 )))
253
254 [[image:1653297924498-393.png]]
255
256
257 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
258
259 Add APP EUI in the application.
260
261 [[image:1653297955910-247.png||height="321" width="716"]]
262
263
264 Add APP KEY and DEV EUI
265
266 [[image:1653298023685-319.png]]
267
268
269 (((
270 (% 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.
271 )))
272
273 [[image:1653298044601-602.png||height="405" width="709"]]
274
275
276
277 == 3.3 Uplink Payload ==
278
279 There are five working modes + one interrupt mode on LT for different type application:
280
281 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
282 * **MOD2**: Double DI Counting + DO + RO
283 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
284 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
285 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
286 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
287
288
289
290 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
291
292 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
293
294 [[image:image-20220523174024-3.png]]
295
296 (((
297
298
299 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
300 )))
301
302 [[image:image-20220523174254-4.png]]
303
304 * RO is for relay. ROx=1 : close，ROx=0 always open.
305 * DI is for digital input. DIx=1: high or float, DIx=0: low.
306 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
307
308 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
309
310 For example if payload is: [[image:image-20220523175847-2.png]]
311
312
313 **The value for the interface is:  **
314
315 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
316
317 AVI2 channel voltage is 0x04AC/1000=1.196V
318
319 ACI1 channel current is 0x1310/1000=4.880mA
320
321 ACI2 channel current is 0x1300/1000=4.864mA
322
323 The last byte 0xAA= 10101010(B) means
324
325 * [1] RO1 relay channel is close and the RO1 LED is ON.
326 * [0] RO2 relay channel is open and RO2 LED is OFF;
327
328
329 **LT22222-L:**
330
331 * [1] DI2 channel is high input and DI2 LED is ON;
332 * [0] DI1 channel is low input;
333
334 * [0] DO3 channel output state
335 ** DO3 is float in case no load between DO3 and V+.;
336 ** DO3 is high in case there is load between DO3 and V+.
337 ** DO3 LED is off in both case
338 * [1] DO2 channel output is low and DO2 LED is ON.
339 * [0] DO1 channel output state
340 ** DO1 is float in case no load between DO1 and V+.;
341 ** DO1 is high in case there is load between DO1 and V+.
342 ** DO1 LED is off in both case
343
344
345
346 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
347
348
349 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
350
351 (((
352 Total : 11 bytes payload
353 )))
354
355 [[image:image-20220523180452-3.png]]
356
357
358 (((
359 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
360 )))
361
362 [[image:image-20220523180506-4.png]]
363
364 * RO is for relay. ROx=1 : close，ROx=0 always open.
365 * FIRST: Indicate this is the first packet after join network.
366 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
367
368 (((
369 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
370 )))
371
372 (((
373
374
375 **To use counting mode, please run:**
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **AT+MOD=2**
382 )))
383 )))
384
385 (% class="box infomessage" %)
386 (((
387 (((
388 **ATZ**
389 )))
390 )))
391
392 (((
393
394
395 (% style="color:#4f81bd" %)**AT Commands for counting:**
396 )))
397
398 (((
399 **For LT22222-L:**
400 )))
401
402 (% class="box infomessage" %)
403 (((
404 (((
405 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
406 )))
407 )))
408
409 (% class="box infomessage" %)
410 (((
411 (((
412 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
413 )))
414 )))
415
416 (% class="box infomessage" %)
417 (((
418 (((
419 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
420 )))
421 )))
422
423 (% class="box infomessage" %)
424 (((
425 (((
426 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
427 )))
428 )))
429
430 (% class="box infomessage" %)
431 (((
432 (((
433 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
434 )))
435 )))
436
437 (% class="box infomessage" %)
438 (((
439 (((
440 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
441 )))
442 )))
443
444
445
446 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
447
448 **LT22222-L**: This mode the DI1 is used as a counting pin.
449
450 [[image:image-20220523181246-5.png]]
451
452 (((
453 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
454 )))
455
456 [[image:image-20220523181301-6.png]]
457
458 * RO is for relay. ROx=1 : close，ROx=0 always open.
459 * FIRST: Indicate this is the first packet after join network.
460 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
461
462 (((
463 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
464 )))
465
466 (((
467 **To use counting mode, please run:**
468 )))
469
470 (% class="box infomessage" %)
471 (((
472 (((
473 **AT+MOD=3**
474 )))
475 )))
476
477 (% class="box infomessage" %)
478 (((
479 (((
480 **ATZ**
481 )))
482 )))
483
484 (((
485 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
486
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
644 **AT Command to set Trigger Condition**:
645
646 (% style="color:#4f81bd" %)**Trigger base on voltage**:
647
648 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
649
650 **Example:**
651
652 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)
653
654 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
655
656
657
658 (% style="color:#4f81bd" %)**Trigger base on current**:
659
660 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
661
662 **Example:**
663
664 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
665
666
667
668 (% style="color:#4f81bd" %)**Trigger base on DI status**:
669
670 DI status trigger Flag.
671
672 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
673
674
675 **Example:**
676
677 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
678
679
680 **Downlink Command to set Trigger Condition:**
681
682 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
683
684 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
685
686 AA: Code for this downlink Command:
687
688 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
689
690 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
691
692 yy2 yy2: AC1 or AV1 high limit.
693
694 yy3 yy3: AC2 or AV2 low limit.
695
696 Yy4 yy4: AC2 or AV2 high limit.
697
698
699 **Example1**: AA 00 13 88 00 00 00 00 00 00
700
701 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
702
703
704 **Example2**: AA 02 01 00
705
706 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
707
708
709
710 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
711
712 MOD6 Payload : total 11 bytes payload
713
714 [[image:image-20220524085923-1.png]]
715
716
717 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
718
719 [[image:image-20220524090106-2.png]]
720
721 * Each bits shows if the corresponding trigger has been configured.
722
723
724 **Example:**
725
726 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
727
728
729 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
730
731 [[image:image-20220524090249-3.png]]
732
733 * Each bits shows which status has been trigger on this uplink.
734
735
736 **Example:**
737
738 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
739
740
741 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
742
743 [[image:image-20220524090456-4.png]]
744
745 * Each bits shows which status has been trigger on this uplink.
746
747
748 **Example:**
749
750 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
751
752 00000101: Means both DI1 and DI2 trigger are enabled.
753
754
755 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
756
757 Downlink command to poll MOD6 status:
758
759 **AB 06**
760
761 When device got this command, it will send the MOD6 payload.
762
763
764
765 === 3.3.7 Payload Decoder ===
766
767 (((
768
769
770 **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/]]
771
772
773 )))
774
775
776
777 == 3.4 ​Configure LT via AT or Downlink ==
778
779 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
780
781 (((
782 There are two kinds of Commands:
783 )))
784
785 * (% 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]]
786
787 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
788
789
790 === 3.4.1 Common Commands ===
791
792 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]]
793
794
795
796 === 3.4.2 Sensor related commands ===
797
798 ==== 3.4.2.1 Set Transmit Interval ====
799
800 Set device uplink interval.
801
802 * AT Command:
803
804 (% class="box infomessage" %)
805 (((
806 **AT+TDC=N **
807 )))
808
809 **Example: **AT+TDC=30000. Means set interval to 30 seconds
810
811
812 * Downlink Payload (prefix 0x01):
813
814 (% class="box infomessage" %)
815 (((
816 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
817 )))
818
819
820
821 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
822
823 Set work mode.
824
825 * AT Command:
826
827 (% class="box infomessage" %)
828 (((
829 **AT+MOD=N  **
830 )))
831
832 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
833
834
835 * Downlink Payload (prefix 0x0A):
836
837 (% class="box infomessage" %)
838 (((
839 **0x0A aa     ~/~/ Same as AT+MOD=aa**
840 )))
841
842
843
844 ==== 3.4.2.3 Poll an uplink ====
845
846 * AT Command:
847
848 There is no AT Command to poll uplink
849
850
851 * Downlink Payload (prefix 0x08):
852
853 (% class="box infomessage" %)
854 (((
855 **0x08 FF     ~/~/ Poll an uplink,**
856 )))
857
858 **Example**: 0x08FF, ask device to send an Uplink
859
860
861
862 ==== 3.4.2.4 Enable Trigger Mode ====
863
864 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
865
866 * AT Command:
867
868 (% class="box infomessage" %)
869 (((
870 **AT+ADDMOD6=1 or 0**
871 )))
872
873 1: Enable Trigger Mode
874
875 0: Disable Trigger Mode
876
877
878 * Downlink Payload (prefix 0x0A 06):
879
880 (% class="box infomessage" %)
881 (((
882 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
883 )))
884
885
886
887 ==== 3.4.2.5 Poll trigger settings ====
888
889 Poll trigger settings,
890
891 * AT Command:
892
893 There is no AT Command for this feature.
894
895
896 * Downlink Payload (prefix 0x AB 06):
897
898 (% class="box infomessage" %)
899 (((
900 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
901 )))
902
903
904
905 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
906
907 Enable Disable DI1/DI2/DI2 as trigger,
908
909 * AT Command:
910
911 (% class="box infomessage" %)
912 (((
913 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
914 )))
915
916
917 **Example:**
918
919 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
920
921 * Downlink Payload (prefix 0xAA 02):
922
923 (% class="box infomessage" %)
924 (((
925 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
926 )))
927
928
929
930 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
931
932 Set DI1 or DI3(for LT-33222-L) trigger.
933
934 * AT Command:
935
936 (% class="box infomessage" %)
937 (((
938 **AT+TRIG1=a,b**
939 )))
940
941 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
942
943 b : delay timing.
944
945
946 **Example:**
947
948 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
949
950
951 * Downlink Payload (prefix 0x09 01 ):
952
953 (% class="box infomessage" %)
954 (((
955 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
956 )))
957
958
959
960 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
961
962 Set DI2 trigger.
963
964 * AT Command:
965
966 (% class="box infomessage" %)
967 (((
968 **AT+TRIG2=a,b**
969 )))
970
971 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
972
973 b : delay timing.
974
975
976 **Example:**
977
978 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
979
980
981 * Downlink Payload (prefix 0x09 02 ):
982
983 (% class="box infomessage" %)
984 (((
985 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
986 )))
987
988
989
990 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
991
992 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
993
994 * AT Command:
995
996 (% class="box infomessage" %)
997 (((
998 **AT+ACLIM. **
999 )))
1000
1001
1002 * Downlink Payload (prefix 0xAA 01 ):
1003
1004 (% class="box infomessage" %)
1005 (((
1006 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1007 )))
1008
1009
1010
1011 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1012
1013 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1014
1015 * AT Command:
1016
1017 (% class="box infomessage" %)
1018 (((
1019 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1020 )))
1021
1022
1023 * Downlink Payload (prefix 0xAA 00 ):
1024
1025 (% class="box infomessage" %)
1026 (((
1027 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1028 )))
1029
1030
1031
1032 ==== 3.4.2.11 Trigger – Set minimum interval ====
1033
1034 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1035
1036 * AT Command:
1037
1038 (% class="box infomessage" %)
1039 (((
1040 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1041 )))
1042
1043
1044 * Downlink Payload (prefix 0xAC ):
1045
1046 (% class="box infomessage" %)
1047 (((
1048 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1049 )))
1050
1051
1052
1053 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1054
1055 * AT Command:
1056
1057 There is no AT Command to control Digital Output
1058
1059
1060 * Downlink Payload (prefix 0x02):
1061
1062 (% class="box infomessage" %)
1063 (((
1064 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1065 )))
1066
1067 (((
1068 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1069 )))
1070
1071 (((
1072 01: Low,  00: High ,  11: No action
1073 )))
1074
1075 [[image:image-20220524092754-5.png]]
1076
1077 (((
1078 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1079 )))
1080
1081 (((
1082 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1083 )))
1084
1085
1086
1087 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1088
1089 * AT Command:
1090
1091 There is no AT Command to control Digital Output
1092
1093
1094 * Downlink Payload (prefix 0xA9):
1095
1096 (% class="box infomessage" %)
1097 (((
1098 (((
1099 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1100 )))
1101 )))
1102
1103 This is to control the digital output time of DO pin. Include four bytes:
1104
1105 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1106
1107 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1108
1109 01: DO pins will change back to original state after timeout.
1110
1111 00: DO pins will change to an inverter state after timeout 
1112
1113
1114 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1115
1116 [[image:image-20220524093238-6.png]]
1117
1118
1119 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1120
1121 [[image:image-20220524093328-7.png]]
1122
1123
1124 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1125
1126 [[image:image-20220524093351-8.png]]
1127
1128
1129 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1130
1131 Latching time. Unit: ms
1132
1133 Device will upload a packet if downlink code executes successfully.
1134
1135
1136 **Example payload:**
1137
1138 **~1. A9 01 01 01 01 07 D0**
1139
1140 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1141
1142 **2. A9 01 00 01 11 07 D0**
1143
1144 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1145
1146 **3. A9 00 00 00 00 07 D0**
1147
1148 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1149
1150 **4. A9 00 11 01 00 07 D0**
1151
1152 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
1153
1154
1155
1156 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1157
1158 * AT Command:
1159
1160 There is no AT Command to control Relay Output
1161
1162
1163 * Downlink Payload (prefix 0x03):
1164
1165 (% class="box infomessage" %)
1166 (((
1167 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1168 )))
1169
1170 (((
1171 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1172 )))
1173
1174 (((
1175 01: Close ,  00: Open , 11: No action
1176 )))
1177
1178 (((
1179 [[image:image-20220524093724-9.png]]
1180 )))
1181
1182 Device will upload a packet if downlink code executes successfully.
1183
1184
1185
1186 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1187
1188 * AT Command:
1189
1190 There is no AT Command to control Relay Output
1191
1192
1193 * Downlink Payload (prefix 0x05):
1194
1195 (% class="box infomessage" %)
1196 (((
1197 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1198 )))
1199
1200 This is to control the relay output time of relay. Include four bytes:
1201
1202 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1203
1204 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1205
1206 01: Relays will change back to original state after timeout.
1207
1208 00: Relays will change to an inverter state after timeout
1209
1210
1211 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1212
1213 [[image:image-20220524093831-10.png]]
1214
1215
1216 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1217
1218 Device will upload a packet if downlink code executes successfully.
1219
1220
1221 **Example payload:**
1222
1223 **~1. 05 01 11 07 D0**
1224
1225 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1226
1227 **2. 05 01 10 07 D0**
1228
1229 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1230
1231 **3. 05 00 01 07 D0**
1232
1233 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1234
1235 **4. 05 00 00 07 D0**
1236
1237 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1238
1239
1240
1241 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1242
1243 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1244
1245 * AT Command:
1246
1247 (% class="box infomessage" %)
1248 (((
1249 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1250 )))
1251
1252
1253 * Downlink Payload (prefix 0xA5):
1254
1255 (% class="box infomessage" %)
1256 (((
1257 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1258 )))
1259
1260
1261
1262 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1263
1264 * AT Command:
1265
1266 (% class="box infomessage" %)
1267 (((
1268 **AT+SETCNT=aa,(bb cc dd ee) **
1269 )))
1270
1271 aa: 1: Set count1,
1272
1273 2: Set count2,
1274
1275 3: Set AV1 count
1276
1277 Bb cc dd ee: number to be set
1278
1279
1280 * Downlink Payload (prefix 0xA8):
1281
1282 (% class="box infomessage" %)
1283 (((
1284 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1285 )))
1286
1287
1288
1289 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1290
1291 Clear counting for counting mode
1292
1293 * AT Command:
1294
1295 (% class="box infomessage" %)
1296 (((
1297 **AT+CLRCOUNT ~/~/ clear all counting**
1298 )))
1299
1300 * Downlink Payload (prefix 0xA6):
1301
1302 (% class="box infomessage" %)
1303 (((
1304 **0x A6 01     ~/~/ clear all counting,**
1305 )))
1306
1307
1308
1309 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1310
1311 * AT Command:
1312
1313 (% class="box infomessage" %)
1314 (((
1315 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1316 )))
1317
1318 * Downlink Payload (prefix 0xA7):
1319
1320 (% class="box infomessage" %)
1321 (((
1322 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1323 )))
1324
1325 (((
1326 range: aa bb cc:0 to 16777215,  (unit:second)
1327
1328
1329 )))
1330
1331
1332 == 3.5 Integrate with Mydevice ==
1333
1334 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:
1335
1336 (((
1337 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1338 )))
1339
1340 (((
1341 (% 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:
1342 )))
1343
1344 [[image:1653356737703-362.png||height="232" width="732"]]
1345
1346 [[image:image-20220524094641-11.png||height="390" width="723"]]
1347
1348
1349 [[image:image-20220524094641-12.png||height="402" width="718"]]
1350
1351
1352 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1353
1354 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1355
1356 Search under The things network
1357
1358 [[image:1653356838789-523.png||height="337" width="740"]]
1359
1360
1361
1362 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1363
1364 [[image:image-20220524094909-1.png||height="335" width="729"]]
1365
1366
1367 [[image:image-20220524094909-2.png||height="337" width="729"]]
1368
1369
1370 [[image:image-20220524094909-3.png||height="338" width="727"]]
1371
1372
1373 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1374
1375
1376 [[image:image-20220524094909-5.png||height="341" width="734"]]
1377
1378
1379
1380 == 3.6 Interface Detail ==
1381
1382 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1383
1384 Support NPN Type sensor
1385
1386 [[image:1653356991268-289.png]]
1387
1388
1389
1390 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1391
1392 (((
1393 The DI port of LT-22222-L can support NPN or PNP output sensor.
1394 )))
1395
1396 (((
1397 (((
1398 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
1399 )))
1400 )))
1401
1402 [[image:1653357170703-587.png]]
1403
1404 (((
1405 (((
1406 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1407 )))
1408 )))
1409
1410 (((
1411
1412 )))
1413
1414 (((
1415 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1416 )))
1417
1418 (((
1419 This type of sensor will output a low signal GND when active.
1420 )))
1421
1422 * (((
1423 Connect sensor’s output to DI1-
1424 )))
1425 * (((
1426 Connect sensor’s VCC to DI1+.
1427 )))
1428
1429 (((
1430 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1431 )))
1432
1433 (((
1434 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1435 )))
1436
1437 (((
1438 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.
1439 )))
1440
1441 (((
1442
1443 )))
1444
1445 (((
1446 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1447 )))
1448
1449 (((
1450 This type of sensor will output a high signal (example 24v) when active.
1451 )))
1452
1453 * (((
1454 Connect sensor’s output to DI1+
1455 )))
1456 * (((
1457 Connect sensor’s GND DI1-.
1458 )))
1459
1460 (((
1461 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1462 )))
1463
1464 (((
1465 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1466 )))
1467
1468 (((
1469 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.
1470 )))
1471
1472 (((
1473
1474 )))
1475
1476 (((
1477 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1478 )))
1479
1480 (((
1481 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1482 )))
1483
1484 * (((
1485 Connect sensor’s output to DI1+ with a serial 50K resistor
1486 )))
1487 * (((
1488 Connect sensor’s GND DI1-.
1489 )))
1490
1491 (((
1492 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1493 )))
1494
1495 (((
1496 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1497 )))
1498
1499 (((
1500 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.
1501 )))
1502
1503
1504
1505 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1506
1507 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1508
1509 [[image:1653357531600-905.png]]
1510
1511
1512
1513 === 3.6.4 Analog Input Interface ===
1514
1515 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:
1516
1517
1518 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1519
1520 [[image:1653357592296-182.png]]
1521
1522 Example to connect a 4~~20mA sensor
1523
1524 We take the wind speed sensor as an example for reference only.
1525
1526
1527 **Specifications of the wind speed sensor:**
1528
1529 Red:  12~~24v
1530
1531 Yellow:  4~~20mA
1532
1533 Black:  GND
1534
1535
1536 **Connection diagram:**
1537
1538 [[image:1653357640609-758.png]]
1539
1540 [[image:1653357648330-671.png||height="155" width="733"]]
1541
1542
1543
1544 === 3.6.5 Relay Output ===
1545
1546 (((
1547 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:
1548 )))
1549
1550 [[image:image-20220524100215-9.png]]
1551
1552 [[image:image-20220524100215-10.png||height="382" width="723"]]
1553
1554
1555
1556 == 3.7 LEDs Indicators ==
1557
1558 [[image:image-20220524100748-11.png]]
1559
1560
1561 = 4. Use AT Command =
1562
1563 == 4.1 Access AT Command ==
1564
1565 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.
1566
1567 [[image:1653358238933-385.png]]
1568
1569
1570 (((
1571 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:
1572 )))
1573
1574 [[image:1653358355238-883.png]]
1575
1576
1577 (((
1578 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/]]
1579 )))
1580
1581 (((
1582 AT+<CMD>?        : Help on <CMD>
1583 )))
1584
1585 (((
1586 AT+<CMD>         : Run <CMD>
1587 )))
1588
1589 (((
1590 AT+<CMD>=<value> : Set the value
1591 )))
1592
1593 (((
1594 AT+<CMD>=?       : Get the value
1595 )))
1596
1597 (((
1598 ATZ: Trig a reset of the MCU
1599 )))
1600
1601 (((
1602 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1603 )))
1604
1605 (((
1606 AT+DEUI: Get or Set the Device EUI
1607 )))
1608
1609 (((
1610 AT+DADDR: Get or Set the Device Address
1611 )))
1612
1613 (((
1614 AT+APPKEY: Get or Set the Application Key
1615 )))
1616
1617 (((
1618 AT+NWKSKEY: Get or Set the Network Session Key
1619 )))
1620
1621 (((
1622 AT+APPSKEY: Get or Set the Application Session Key
1623 )))
1624
1625 (((
1626 AT+APPEUI: Get or Set the Application EUI
1627 )))
1628
1629 (((
1630 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1631 )))
1632
1633 (((
1634 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1635 )))
1636
1637 (((
1638 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1639 )))
1640
1641 (((
1642 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1643 )))
1644
1645 (((
1646 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1647 )))
1648
1649 (((
1650 AT+RX2FQ: Get or Set the Rx2 window frequency
1651 )))
1652
1653 (((
1654 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1655 )))
1656
1657 (((
1658 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1659 )))
1660
1661 (((
1662 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1663 )))
1664
1665 (((
1666 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1667 )))
1668
1669 (((
1670 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1671 )))
1672
1673 (((
1674 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1675 )))
1676
1677 (((
1678 AT+NWKID: Get or Set the Network ID
1679 )))
1680
1681 (((
1682 AT+FCU: Get or Set the Frame Counter Uplink
1683 )))
1684
1685 (((
1686 AT+FCD: Get or Set the Frame Counter Downlink
1687 )))
1688
1689 (((
1690 AT+CLASS: Get or Set the Device Class
1691 )))
1692
1693 (((
1694 AT+JOIN: Join network
1695 )))
1696
1697 (((
1698 AT+NJS: Get OTAA Join Status
1699 )))
1700
1701 (((
1702 AT+SENDB: Send hexadecimal data along with the application port
1703 )))
1704
1705 (((
1706 AT+SEND: Send text data along with the application port
1707 )))
1708
1709 (((
1710 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1711 )))
1712
1713 (((
1714 AT+RECV: Print last received data in raw format
1715 )))
1716
1717 (((
1718 AT+VER: Get current image version and Frequency Band
1719 )))
1720
1721 (((
1722 AT+CFM: Get or Set the confirmation mode (0-1)
1723 )))
1724
1725 (((
1726 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1727 )))
1728
1729 (((
1730 AT+SNR: Get the SNR of the last received packet
1731 )))
1732
1733 (((
1734 AT+RSSI: Get the RSSI of the last received packet
1735 )))
1736
1737 (((
1738 AT+TDC: Get or set the application data transmission interval in ms
1739 )))
1740
1741 (((
1742 AT+PORT: Get or set the application port
1743 )))
1744
1745 (((
1746 AT+DISAT: Disable AT commands
1747 )))
1748
1749 (((
1750 AT+PWORD: Set password, max 9 digits
1751 )))
1752
1753 (((
1754 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1755 )))
1756
1757 (((
1758 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1759 )))
1760
1761 (((
1762 AT+CFG: Print all settings
1763
1764
1765 )))
1766
1767
1768
1769 == 4.2 Common AT Command Sequence ==
1770
1771 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1772
1773 (((
1774
1775
1776 **If device has not joined network yet:**
1777 )))
1778
1779 (((
1780 (% style="background-color:#dcdcdc" %)123456
1781 )))
1782
1783 (((
1784 (% style="background-color:#dcdcdc" %)AT+FDR
1785 )))
1786
1787 (((
1788 (% style="background-color:#dcdcdc" %)123456
1789 )))
1790
1791 (((
1792 (% style="background-color:#dcdcdc" %)AT+NJM=0
1793 )))
1794
1795 (((
1796 (% style="background-color:#dcdcdc" %)ATZ
1797 )))
1798
1799
1800 (((
1801 **If device already joined network:**
1802 )))
1803
1804 (((
1805 (% style="background-color:#dcdcdc" %)AT+NJM=0
1806 )))
1807
1808 (((
1809 (% style="background-color:#dcdcdc" %)ATZ
1810
1811
1812 )))
1813
1814
1815
1816 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1817
1818 (((
1819
1820
1821 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1822 )))
1823
1824 (((
1825 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1826 )))
1827
1828 (((
1829 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1830 )))
1831
1832 (((
1833 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1834 )))
1835
1836 (((
1837 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1838 )))
1839
1840 (((
1841 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1842 )))
1843
1844 (((
1845 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1846 )))
1847
1848 (((
1849 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1850 )))
1851
1852 (((
1853 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1854 )))
1855
1856 (((
1857 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1858 )))
1859
1860 (((
1861 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1862 )))
1863
1864 (((
1865 (% 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.
1866 )))
1867
1868 (((
1869 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1870
1871
1872 )))
1873
1874 (((
1875 (% style="color:red" %)**Note:**
1876 )))
1877
1878 (((
1879 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1880 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1881 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.
1882 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
1883 )))
1884
1885 (((
1886 [[image:1653359097980-169.png||height="188" width="729"]]
1887 )))
1888
1889 (((
1890
1891 )))
1892
1893
1894 === 4.2.3 Change to Class A ===
1895
1896 If sensor JOINED
1897 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1898 ATZ
1899
1900
1901 = 5. FAQ =
1902
1903 == 5.1 How to upgrade the image? ==
1904
1905
1906 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1907
1908 * Support new features
1909 * For bug fix
1910 * Change LoRaWAN bands.
1911
1912 Below shows the hardware connection for how to upload an image to the LT:
1913
1914 [[image:1653359603330-121.png]]
1915
1916
1917 (((
1918 (% 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]].
1919 (% 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/]].
1920 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1921
1922
1923 (% style="color:blue" %)**For LT-22222-L**(%%):
1924 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.
1925 )))
1926
1927 [[image:image-20220524103407-12.png]]
1928
1929 [[image:image-20220524103429-13.png]]
1930
1931 [[image:image-20220524104033-15.png]]
1932
1933
1934 (% 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:
1935
1936 [[image:1653360054704-518.png||height="186" width="745"]]
1937
1938
1939 (((
1940 (((
1941
1942
1943 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1944 )))
1945 )))
1946
1947 (((
1948 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1949 )))
1950
1951 (((
1952
1953
1954 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1955 )))
1956
1957 (((
1958 (((
1959 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1960 )))
1961 )))
1962
1963 (((
1964 (((
1965 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1966
1967
1968 )))
1969 )))
1970
1971 (((
1972 (% 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.
1973 )))
1974
1975 (((
1976 [[image:1653360231087-571.png||height="401" width="727"]]
1977 )))
1978
1979 (((
1980 (% 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.
1981 )))
1982
1983
1984 (((
1985 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1986 )))
1987
1988 (((
1989 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1990 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1991 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1992 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1993 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1994 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1995 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1996 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1997 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1998 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1999 )))
2000
2001
2002 (((
2003 As shown in below:
2004 )))
2005
2006 [[image:1653360498588-932.png||height="485" width="726"]]
2007
2008
2009 == 5.4 Can I see counting event in Serial? ==
2010
2011 (((
2012 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.
2013
2014
2015 == 5.5 Can i use point to point communication for LT-22222-L? ==
2016
2017 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2018 )))
2019
2020 (((
2021
2022
2023 = 6. Trouble Shooting =
2024 )))
2025
2026 (((
2027 (((
2028 == 6.1 Downlink doesn’t work, how to solve it? ==
2029 )))
2030 )))
2031
2032 (((
2033 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2034 )))
2035
2036 (((
2037
2038
2039 == 6.2 Have trouble to upload image. ==
2040 )))
2041
2042 (((
2043 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2044 )))
2045
2046 (((
2047
2048
2049 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2050 )))
2051
2052 (((
2053 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2054 )))
2055
2056
2057
2058 = 7. Order Info =
2059
2060
2061 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2062
2063
2064 (% style="color:#4f81bd" %)**XXX:**
2065
2066 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2067 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2068 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2069 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2070 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2071 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2072 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2073 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2074 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2075
2076 = 8. Packing Info =
2077
2078
2079 **Package Includes**:
2080
2081 * LT-22222-L I/O Controller x 1
2082 * Stick Antenna for LoRa RF part x 1
2083 * Bracket for controller x1
2084 * Program cable x 1
2085
2086 **Dimension and weight**:
2087
2088 * Device Size: 13.5 x 7 x 3 cm
2089 * Device Weight: 105g
2090 * Package Size / pcs : 14.5 x 8 x 5 cm
2091 * Weight / pcs : 170g
2092
2093 = 9. Support =
2094
2095 * (((
2096 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.
2097 )))
2098 * (((
2099 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]]
2100 )))
2101
2102 = 10. Reference​​​​​ =
2103
2104 * 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]]
2105 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2106 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2107 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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