Version 78.2 by Xiaoling on 2022/06/10 09:39
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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 == 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 == 1.4  Applications ==
180
181 * Smart Buildings & Home Automation
182 * Logistics and Supply Chain Management
183 * Smart Metering
184 * Smart Agriculture
185 * Smart Cities
186 * Smart Factory
187
188
189 == 1.5 Hardware Variants ==
190
191 (% border="1" style="background-color:#f7faff; width:500px" %)
192 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
193 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
194 * 2 x Digital Input (Bi-direction)
195 * 2 x Digital Output
196 * 2 x Relay Output (5A@250VAC / 30VDC)
197 * 2 x 0~~20mA Analog Input (res:0.01mA)
198 * 2 x 0~~30V Analog Input (res:0.01v)
199 * 1 x Counting Port
200 )))
201
202
203 = 2. Power ON Device =
204
205 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.
206
207 (((
208 PWR will on when device is properly powered.
209 )))
210
211 [[image:1653297104069-180.png]]
212
213
214
215 = 3. Operation Mode =
216
217 == 3.1 How it works? ==
218
219 (((
220 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. 
221 )))
222
223 (((
224 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.
225 )))
226
227
228 == 3.2 Example to join LoRaWAN network ==
229
230 (((
231 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. 
232 )))
233
234 [[image:image-20220523172350-1.png||height="266" width="864"]]
235
236
237 (((
238 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:
239 )))
240
241 (((
242 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
243 )))
244
245 (((
246 Each LT is shipped with a sticker with the default device EUI as below:
247 )))
248
249 [[image:1653297924498-393.png]]
250
251
252 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
253
254 Add APP EUI in the application.
255
256 [[image:1653297955910-247.png||height="321" width="716"]]
257
258
259 Add APP KEY and DEV EUI
260
261 [[image:1653298023685-319.png]]
262
263
264 (((
265 (% 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.
266 )))
267
268 [[image:1653298044601-602.png||height="405" width="709"]]
269
270
271
272 == 3.3 Uplink Payload ==
273
274 There are five working modes + one interrupt mode on LT for different type application:
275
276 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
277 * **MOD2**: Double DI Counting + DO + RO
278 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
279 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
280 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
281 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
282
283
284
285
286 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
287
288 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
289
290 [[image:image-20220523174024-3.png]]
291
292 (((
293
294
295 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
296 )))
297
298 [[image:image-20220523174254-4.png]]
299
300 * RO is for relay. ROx=1 : close，ROx=0 always open.
301 * DI is for digital input. DIx=1: high or float, DIx=0: low.
302 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
303
304 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
305
306 For example if payload is: [[image:image-20220523175847-2.png]]
307
308
309 **The value for the interface is:  **
310
311 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
312
313 AVI2 channel voltage is 0x04AC/1000=1.196V
314
315 ACI1 channel current is 0x1310/1000=4.880mA
316
317 ACI2 channel current is 0x1300/1000=4.864mA
318
319 The last byte 0xAA= 10101010(B) means
320
321 * [1] RO1 relay channel is close and the RO1 LED is ON.
322 * [0] RO2 relay channel is open and RO2 LED is OFF;
323
324 **LT22222-L:**
325
326 * [1] DI2 channel is high input and DI2 LED is ON;
327 * [0] DI1 channel is low input;
328
329 * [0] DO3 channel output state
330 ** DO3 is float in case no load between DO3 and V+.;
331 ** DO3 is high in case there is load between DO3 and V+.
332 ** DO3 LED is off in both case
333 * [1] DO2 channel output is low and DO2 LED is ON.
334 * [0] DO1 channel output state
335 ** DO1 is float in case no load between DO1 and V+.;
336 ** DO1 is high in case there is load between DO1 and V+.
337 ** DO1 LED is off in both case
338
339
340
341
342 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
343
344
345 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
346
347 (((
348 Total : 11 bytes payload
349 )))
350
351 [[image:image-20220523180452-3.png]]
352
353
354 (((
355 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
356 )))
357
358 [[image:image-20220523180506-4.png]]
359
360 * RO is for relay. ROx=1 : close，ROx=0 always open.
361 * FIRST: Indicate this is the first packet after join network.
362 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
363
364 (((
365 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
366 )))
367
368 (((
369
370
371 **To use counting mode, please run:**
372 )))
373
374 (% class="box infomessage" %)
375 (((
376 (((
377 **AT+MOD=2**
378 )))
379 )))
380
381 (% class="box infomessage" %)
382 (((
383 (((
384 **ATZ**
385 )))
386 )))
387
388 (((
389
390
391 (% style="color:#4f81bd" %)**AT Commands for counting:**
392 )))
393
394 (((
395 **For LT22222-L:**
396 )))
397
398 (% class="box infomessage" %)
399 (((
400 (((
401 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
402 )))
403 )))
404
405 (% class="box infomessage" %)
406 (((
407 (((
408 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
409 )))
410 )))
411
412 (% class="box infomessage" %)
413 (((
414 (((
415 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
416 )))
417 )))
418
419 (% class="box infomessage" %)
420 (((
421 (((
422 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
423 )))
424 )))
425
426 (% class="box infomessage" %)
427 (((
428 (((
429 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
430 )))
431 )))
432
433 (% class="box infomessage" %)
434 (((
435 (((
436 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
437 )))
438 )))
439
440
441
442 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
443
444 **LT22222-L**: This mode the DI1 is used as a counting pin.
445
446 [[image:image-20220523181246-5.png]]
447
448 (((
449 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
450 )))
451
452 [[image:image-20220523181301-6.png]]
453
454 * RO is for relay. ROx=1 : close，ROx=0 always open.
455 * FIRST: Indicate this is the first packet after join network.
456 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
457
458 (((
459 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
460 )))
461
462 (((
463 **To use counting mode, please run:**
464 )))
465
466 (% class="box infomessage" %)
467 (((
468 (((
469 **AT+MOD=3**
470 )))
471 )))
472
473 (% class="box infomessage" %)
474 (((
475 (((
476 **ATZ**
477 )))
478 )))
479
480 (((
481 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
482
483
484 )))
485
486
487
488 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
489
490
491 **LT22222-L**: This mode the DI1 is used as a counting pin.
492
493 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.
494
495 [[image:image-20220523181903-8.png]]
496
497
498 (((
499 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
500 )))
501
502 [[image:image-20220523181727-7.png]]
503
504 * RO is for relay. ROx=1 : close，ROx=0 always open.
505 * FIRST: Indicate this is the first packet after join network.
506 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
507
508 (((
509 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
510 )))
511
512 (((
513
514
515 **To use this mode, please run:**
516 )))
517
518 (% class="box infomessage" %)
519 (((
520 (((
521 **AT+MOD=4**
522 )))
523 )))
524
525 (% class="box infomessage" %)
526 (((
527 (((
528 **ATZ**
529 )))
530 )))
531
532 (((
533
534 )))
535
536 (((
537 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
538 )))
539
540 (((
541
542
543 **Plus below command for AVI1 Counting:**
544 )))
545
546 (% class="box infomessage" %)
547 (((
548 (((
549 **AT+SETCNT=3,60   (set AVI Count to 60)**
550 )))
551 )))
552
553 (% class="box infomessage" %)
554 (((
555 (((
556 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
557 )))
558 )))
559
560 (% class="box infomessage" %)
561 (((
562 (((
563 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
564 )))
565 )))
566
567 (% class="box infomessage" %)
568 (((
569 (((
570 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
571 )))
572 )))
573
574
575
576 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
577
578
579 **LT22222-L**: This mode the DI1 is used as a counting pin.
580
581 [[image:image-20220523182334-9.png]]
582
583 (((
584
585
586 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
587 )))
588
589 * RO is for relay. ROx=1 : close，ROx=0 always open.
590 * FIRST: Indicate this is the first packet after join network.
591 * (((
592 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
593 )))
594
595 (((
596 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
597 )))
598
599 (((
600
601
602 **To use this mode, please run:**
603 )))
604
605 (% class="box infomessage" %)
606 (((
607 (((
608 **AT+MOD=5**
609 )))
610 )))
611
612 (% class="box infomessage" %)
613 (((
614 (((
615 **ATZ**
616 )))
617 )))
618
619 (((
620 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
621 )))
622
623
624
625 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
626
627
628 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
629
630 For example, if user has configured below commands:
631
632 * **AT+MOD=1 ** **~-~->** The normal working mode
633 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
634
635 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
636
637 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
638 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.**
639
640 **AT Command to set Trigger Condition**:
641
642 (% style="color:#4f81bd" %)**Trigger base on voltage**:
643
644 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
645
646 **Example:**
647
648 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)
649
650 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
651
652
653
654 (% style="color:#4f81bd" %)**Trigger base on current**:
655
656 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
657
658 **Example:**
659
660 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
661
662
663
664 (% style="color:#4f81bd" %)**Trigger base on DI status**:
665
666 DI status trigger Flag.
667
668 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
669
670
671 **Example:**
672
673 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
674
675
676 **Downlink Command to set Trigger Condition:**
677
678 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
679
680 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
681
682 AA: Code for this downlink Command:
683
684 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
685
686 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
687
688 yy2 yy2: AC1 or AV1 high limit.
689
690 yy3 yy3: AC2 or AV2 low limit.
691
692 Yy4 yy4: AC2 or AV2 high limit.
693
694
695 **Example1**: AA 00 13 88 00 00 00 00 00 00
696
697 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
698
699
700 **Example2**: AA 02 01 00
701
702 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
703
704
705
706 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
707
708 MOD6 Payload : total 11 bytes payload
709
710 [[image:image-20220524085923-1.png]]
711
712
713 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
714
715 [[image:image-20220524090106-2.png]]
716
717 * Each bits shows if the corresponding trigger has been configured.
718
719 **Example:**
720
721 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
722
723
724 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
725
726 [[image:image-20220524090249-3.png]]
727
728 * Each bits shows which status has been trigger on this uplink.
729
730 **Example:**
731
732 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
733
734
735 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
736
737 [[image:image-20220524090456-4.png]]
738
739 * Each bits shows which status has been trigger on this uplink.
740
741 **Example:**
742
743 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
744
745 00000101: Means both DI1 and DI2 trigger are enabled.
746
747
748 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
749
750 Downlink command to poll MOD6 status:
751
752 **AB 06**
753
754 When device got this command, it will send the MOD6 payload.
755
756
757
758 === 3.3.7 Payload Decoder ===
759
760 (((
761
762
763 **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/]]
764
765
766 )))
767
768
769
770 == 3.4 ​Configure LT via AT or Downlink ==
771
772 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
773
774 (((
775 There are two kinds of Commands:
776 )))
777
778 * (% 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]]
779
780 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
781
782 === 3.4.1 Common Commands ===
783
784 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]]
785
786
787
788 === 3.4.2 Sensor related commands ===
789
790 ==== 3.4.2.1 Set Transmit Interval ====
791
792 Set device uplink interval.
793
794 * AT Command:
795
796 (% class="box infomessage" %)
797 (((
798 **AT+TDC=N **
799 )))
800
801 **Example: **AT+TDC=30000. Means set interval to 30 seconds
802
803
804 * Downlink Payload (prefix 0x01):
805
806 (% class="box infomessage" %)
807 (((
808 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
809 )))
810
811
812
813 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
814
815 Set work mode.
816
817 * AT Command:
818
819 (% class="box infomessage" %)
820 (((
821 **AT+MOD=N  **
822 )))
823
824 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
825
826
827 * Downlink Payload (prefix 0x0A):
828
829 (% class="box infomessage" %)
830 (((
831 **0x0A aa     ~/~/ Same as AT+MOD=aa**
832 )))
833
834
835
836 ==== 3.4.2.3 Poll an uplink ====
837
838 * AT Command:
839
840 There is no AT Command to poll uplink
841
842
843 * Downlink Payload (prefix 0x08):
844
845 (% class="box infomessage" %)
846 (((
847 **0x08 FF     ~/~/ Poll an uplink,**
848 )))
849
850 **Example**: 0x08FF, ask device to send an Uplink
851
852
853
854 ==== 3.4.2.4 Enable Trigger Mode ====
855
856 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
857
858 * AT Command:
859
860 (% class="box infomessage" %)
861 (((
862 **AT+ADDMOD6=1 or 0**
863 )))
864
865 1: Enable Trigger Mode
866
867 0: Disable Trigger Mode
868
869
870 * Downlink Payload (prefix 0x0A 06):
871
872 (% class="box infomessage" %)
873 (((
874 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
875 )))
876
877
878
879 ==== 3.4.2.5 Poll trigger settings ====
880
881 Poll trigger settings,
882
883 * AT Command:
884
885 There is no AT Command for this feature.
886
887
888 * Downlink Payload (prefix 0x AB 06):
889
890 (% class="box infomessage" %)
891 (((
892 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
893 )))
894
895
896
897 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
898
899 Enable Disable DI1/DI2/DI2 as trigger,
900
901 * AT Command:
902
903 (% class="box infomessage" %)
904 (((
905 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
906 )))
907
908
909 **Example:**
910
911 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
912
913 * Downlink Payload (prefix 0xAA 02):
914
915 (% class="box infomessage" %)
916 (((
917 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
918 )))
919
920
921
922 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
923
924 Set DI1 or DI3(for LT-33222-L) trigger.
925
926 * AT Command:
927
928 (% class="box infomessage" %)
929 (((
930 **AT+TRIG1=a,b**
931 )))
932
933 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
934
935 b : delay timing.
936
937
938 **Example:**
939
940 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
941
942
943 * Downlink Payload (prefix 0x09 01 ):
944
945 (% class="box infomessage" %)
946 (((
947 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
948 )))
949
950
951
952 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
953
954 Set DI2 trigger.
955
956 * AT Command:
957
958 (% class="box infomessage" %)
959 (((
960 **AT+TRIG2=a,b**
961 )))
962
963 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
964
965 b : delay timing.
966
967
968 **Example:**
969
970 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
971
972
973 * Downlink Payload (prefix 0x09 02 ):
974
975 (% class="box infomessage" %)
976 (((
977 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
978 )))
979
980
981
982 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
983
984 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
985
986 * AT Command:
987
988 (% class="box infomessage" %)
989 (((
990 **AT+ACLIM. **
991 )))
992
993
994 * Downlink Payload (prefix 0xAA 01 ):
995
996 (% class="box infomessage" %)
997 (((
998 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
999 )))
1000
1001
1002
1003 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1004
1005 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1006
1007 * AT Command:
1008
1009 (% class="box infomessage" %)
1010 (((
1011 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1012 )))
1013
1014
1015 * Downlink Payload (prefix 0xAA 00 ):
1016
1017 (% class="box infomessage" %)
1018 (((
1019 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1020 )))
1021
1022
1023
1024 ==== 3.4.2.11 Trigger – Set minimum interval ====
1025
1026 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1027
1028 * AT Command:
1029
1030 (% class="box infomessage" %)
1031 (((
1032 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1033 )))
1034
1035
1036 * Downlink Payload (prefix 0xAC ):
1037
1038 (% class="box infomessage" %)
1039 (((
1040 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1041 )))
1042
1043
1044
1045 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1046
1047 * AT Command:
1048
1049 There is no AT Command to control Digital Output
1050
1051
1052 * Downlink Payload (prefix 0x02):
1053
1054 (% class="box infomessage" %)
1055 (((
1056 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1057 )))
1058
1059 (((
1060 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1061 )))
1062
1063 (((
1064 01: Low,  00: High ,  11: No action
1065 )))
1066
1067 [[image:image-20220524092754-5.png]]
1068
1069 (((
1070 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1071 )))
1072
1073 (((
1074 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1075 )))
1076
1077
1078
1079 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1080
1081 * AT Command:
1082
1083 There is no AT Command to control Digital Output
1084
1085
1086 * Downlink Payload (prefix 0xA9):
1087
1088 (% class="box infomessage" %)
1089 (((
1090 (((
1091 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1092 )))
1093 )))
1094
1095 This is to control the digital output time of DO pin. Include four bytes:
1096
1097 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1098
1099 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1100
1101 01: DO pins will change back to original state after timeout.
1102
1103 00: DO pins will change to an inverter state after timeout 
1104
1105
1106 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1107
1108 [[image:image-20220524093238-6.png]]
1109
1110
1111 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1112
1113 [[image:image-20220524093328-7.png]]
1114
1115
1116 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1117
1118 [[image:image-20220524093351-8.png]]
1119
1120
1121 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1122
1123 Latching time. Unit: ms
1124
1125 Device will upload a packet if downlink code executes successfully.
1126
1127
1128 **Example payload:**
1129
1130 **~1. A9 01 01 01 01 07 D0**
1131
1132 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1133
1134 **2. A9 01 00 01 11 07 D0**
1135
1136 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1137
1138 **3. A9 00 00 00 00 07 D0**
1139
1140 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1141
1142 **4. A9 00 11 01 00 07 D0**
1143
1144 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
1145
1146
1147
1148 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1149
1150 * AT Command:
1151
1152 There is no AT Command to control Relay Output
1153
1154
1155 * Downlink Payload (prefix 0x03):
1156
1157 (% class="box infomessage" %)
1158 (((
1159 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1160 )))
1161
1162 (((
1163 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1164 )))
1165
1166 (((
1167 01: Close ,  00: Open , 11: No action
1168 )))
1169
1170 (((
1171 [[image:image-20220524093724-9.png]]
1172 )))
1173
1174 Device will upload a packet if downlink code executes successfully.
1175
1176
1177
1178 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1179
1180 * AT Command:
1181
1182 There is no AT Command to control Relay Output
1183
1184
1185 * Downlink Payload (prefix 0x05):
1186
1187 (% class="box infomessage" %)
1188 (((
1189 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1190 )))
1191
1192 This is to control the relay output time of relay. Include four bytes:
1193
1194 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1195
1196 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1197
1198 01: Relays will change back to original state after timeout.
1199
1200 00: Relays will change to an inverter state after timeout
1201
1202
1203 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1204
1205 [[image:image-20220524093831-10.png]]
1206
1207
1208 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1209
1210 Device will upload a packet if downlink code executes successfully.
1211
1212
1213 **Example payload:**
1214
1215 **~1. 05 01 11 07 D0**
1216
1217 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1218
1219 **2. 05 01 10 07 D0**
1220
1221 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1222
1223 **3. 05 00 01 07 D0**
1224
1225 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1226
1227 **4. 05 00 00 07 D0**
1228
1229 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1230
1231
1232
1233 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1234
1235 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1236
1237 * AT Command:
1238
1239 (% class="box infomessage" %)
1240 (((
1241 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1242 )))
1243
1244
1245 * Downlink Payload (prefix 0xA5):
1246
1247 (% class="box infomessage" %)
1248 (((
1249 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1250 )))
1251
1252
1253
1254 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1255
1256 * AT Command:
1257
1258 (% class="box infomessage" %)
1259 (((
1260 **AT+SETCNT=aa,(bb cc dd ee) **
1261 )))
1262
1263 aa: 1: Set count1,
1264
1265 2: Set count2,
1266
1267 3: Set AV1 count
1268
1269 Bb cc dd ee: number to be set
1270
1271
1272 * Downlink Payload (prefix 0xA8):
1273
1274 (% class="box infomessage" %)
1275 (((
1276 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1277 )))
1278
1279
1280
1281 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1282
1283 Clear counting for counting mode
1284
1285 * AT Command:
1286
1287 (% class="box infomessage" %)
1288 (((
1289 **AT+CLRCOUNT ~/~/ clear all counting**
1290 )))
1291
1292 * Downlink Payload (prefix 0xA6):
1293
1294 (% class="box infomessage" %)
1295 (((
1296 **0x A6 01     ~/~/ clear all counting,**
1297 )))
1298
1299
1300
1301 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1302
1303 * AT Command:
1304
1305 (% class="box infomessage" %)
1306 (((
1307 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1308 )))
1309
1310 * Downlink Payload (prefix 0xA7):
1311
1312 (% class="box infomessage" %)
1313 (((
1314 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1315 )))
1316
1317 (((
1318 range: aa bb cc:0 to 16777215,  (unit:second)
1319
1320
1321 )))
1322
1323
1324 == 3.5 Integrate with Mydevice ==
1325
1326 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:
1327
1328 (((
1329 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1330 )))
1331
1332 (((
1333 (% 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:
1334 )))
1335
1336 [[image:1653356737703-362.png||height="232" width="732"]]
1337
1338 [[image:image-20220524094641-11.png||height="390" width="723"]]
1339
1340
1341 [[image:image-20220524094641-12.png||height="402" width="718"]]
1342
1343
1344 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1345
1346 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1347
1348 Search under The things network
1349
1350 [[image:1653356838789-523.png||height="337" width="740"]]
1351
1352
1353
1354 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1355
1356 [[image:image-20220524094909-1.png||height="335" width="729"]]
1357
1358
1359 [[image:image-20220524094909-2.png||height="337" width="729"]]
1360
1361
1362 [[image:image-20220524094909-3.png||height="338" width="727"]]
1363
1364
1365 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1366
1367
1368 [[image:image-20220524094909-5.png||height="341" width="734"]]
1369
1370
1371
1372 == 3.6 Interface Detail ==
1373
1374 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1375
1376 Support NPN Type sensor
1377
1378 [[image:1653356991268-289.png]]
1379
1380
1381
1382 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1383
1384 (((
1385 The DI port of LT-22222-L can support NPN or PNP output sensor.
1386 )))
1387
1388 (((
1389 (((
1390 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
1391 )))
1392 )))
1393
1394 [[image:1653357170703-587.png]]
1395
1396 (((
1397 (((
1398 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1399 )))
1400 )))
1401
1402 (((
1403
1404 )))
1405
1406 (((
1407 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1408 )))
1409
1410 (((
1411 This type of sensor will output a low signal GND when active.
1412 )))
1413
1414 * (((
1415 Connect sensor’s output to DI1-
1416 )))
1417 * (((
1418 Connect sensor’s VCC to DI1+.
1419 )))
1420
1421 (((
1422 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1423 )))
1424
1425 (((
1426 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1427 )))
1428
1429 (((
1430 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.
1431 )))
1432
1433 (((
1434
1435 )))
1436
1437 (((
1438 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1439 )))
1440
1441 (((
1442 This type of sensor will output a high signal (example 24v) when active.
1443 )))
1444
1445 * (((
1446 Connect sensor’s output to DI1+
1447 )))
1448 * (((
1449 Connect sensor’s GND DI1-.
1450 )))
1451
1452 (((
1453 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1454 )))
1455
1456 (((
1457 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1458 )))
1459
1460 (((
1461 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.
1462 )))
1463
1464 (((
1465
1466 )))
1467
1468 (((
1469 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1470 )))
1471
1472 (((
1473 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1474 )))
1475
1476 * (((
1477 Connect sensor’s output to DI1+ with a serial 50K resistor
1478 )))
1479 * (((
1480 Connect sensor’s GND DI1-.
1481 )))
1482
1483 (((
1484 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1485 )))
1486
1487 (((
1488 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1489 )))
1490
1491 (((
1492 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.
1493 )))
1494
1495
1496
1497 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1498
1499 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1500
1501 [[image:1653357531600-905.png]]
1502
1503
1504
1505 === 3.6.4 Analog Input Interface ===
1506
1507 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:
1508
1509
1510 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1511
1512 [[image:1653357592296-182.png]]
1513
1514 Example to connect a 4~~20mA sensor
1515
1516 We take the wind speed sensor as an example for reference only.
1517
1518
1519 **Specifications of the wind speed sensor:**
1520
1521 Red:  12~~24v
1522
1523 Yellow:  4~~20mA
1524
1525 Black:  GND
1526
1527
1528 **Connection diagram:**
1529
1530 [[image:1653357640609-758.png]]
1531
1532 [[image:1653357648330-671.png||height="155" width="733"]]
1533
1534
1535
1536 === 3.6.5 Relay Output ===
1537
1538 (((
1539 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:
1540 )))
1541
1542 [[image:image-20220524100215-9.png]]
1543
1544 [[image:image-20220524100215-10.png||height="382" width="723"]]
1545
1546
1547
1548 == 3.7 LEDs Indicators ==
1549
1550 [[image:image-20220524100748-11.png]]
1551
1552
1553 = 4. Use AT Command =
1554
1555 == 4.1 Access AT Command ==
1556
1557 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.
1558
1559 [[image:1653358238933-385.png]]
1560
1561
1562 (((
1563 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:
1564 )))
1565
1566 [[image:1653358355238-883.png]]
1567
1568
1569 (((
1570 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/]]
1571 )))
1572
1573 (((
1574 AT+<CMD>?        : Help on <CMD>
1575 )))
1576
1577 (((
1578 AT+<CMD>         : Run <CMD>
1579 )))
1580
1581 (((
1582 AT+<CMD>=<value> : Set the value
1583 )))
1584
1585 (((
1586 AT+<CMD>=?       : Get the value
1587 )))
1588
1589 (((
1590 ATZ: Trig a reset of the MCU
1591 )))
1592
1593 (((
1594 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1595 )))
1596
1597 (((
1598 AT+DEUI: Get or Set the Device EUI
1599 )))
1600
1601 (((
1602 AT+DADDR: Get or Set the Device Address
1603 )))
1604
1605 (((
1606 AT+APPKEY: Get or Set the Application Key
1607 )))
1608
1609 (((
1610 AT+NWKSKEY: Get or Set the Network Session Key
1611 )))
1612
1613 (((
1614 AT+APPSKEY: Get or Set the Application Session Key
1615 )))
1616
1617 (((
1618 AT+APPEUI: Get or Set the Application EUI
1619 )))
1620
1621 (((
1622 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1623 )))
1624
1625 (((
1626 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1627 )))
1628
1629 (((
1630 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1631 )))
1632
1633 (((
1634 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1635 )))
1636
1637 (((
1638 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1639 )))
1640
1641 (((
1642 AT+RX2FQ: Get or Set the Rx2 window frequency
1643 )))
1644
1645 (((
1646 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1647 )))
1648
1649 (((
1650 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1651 )))
1652
1653 (((
1654 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1655 )))
1656
1657 (((
1658 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1659 )))
1660
1661 (((
1662 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1663 )))
1664
1665 (((
1666 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1667 )))
1668
1669 (((
1670 AT+NWKID: Get or Set the Network ID
1671 )))
1672
1673 (((
1674 AT+FCU: Get or Set the Frame Counter Uplink
1675 )))
1676
1677 (((
1678 AT+FCD: Get or Set the Frame Counter Downlink
1679 )))
1680
1681 (((
1682 AT+CLASS: Get or Set the Device Class
1683 )))
1684
1685 (((
1686 AT+JOIN: Join network
1687 )))
1688
1689 (((
1690 AT+NJS: Get OTAA Join Status
1691 )))
1692
1693 (((
1694 AT+SENDB: Send hexadecimal data along with the application port
1695 )))
1696
1697 (((
1698 AT+SEND: Send text data along with the application port
1699 )))
1700
1701 (((
1702 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1703 )))
1704
1705 (((
1706 AT+RECV: Print last received data in raw format
1707 )))
1708
1709 (((
1710 AT+VER: Get current image version and Frequency Band
1711 )))
1712
1713 (((
1714 AT+CFM: Get or Set the confirmation mode (0-1)
1715 )))
1716
1717 (((
1718 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1719 )))
1720
1721 (((
1722 AT+SNR: Get the SNR of the last received packet
1723 )))
1724
1725 (((
1726 AT+RSSI: Get the RSSI of the last received packet
1727 )))
1728
1729 (((
1730 AT+TDC: Get or set the application data transmission interval in ms
1731 )))
1732
1733 (((
1734 AT+PORT: Get or set the application port
1735 )))
1736
1737 (((
1738 AT+DISAT: Disable AT commands
1739 )))
1740
1741 (((
1742 AT+PWORD: Set password, max 9 digits
1743 )))
1744
1745 (((
1746 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1747 )))
1748
1749 (((
1750 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1751 )))
1752
1753 (((
1754 AT+CFG: Print all settings
1755
1756
1757 )))
1758
1759
1760
1761 == 4.2 Common AT Command Sequence ==
1762
1763 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1764
1765 (((
1766
1767
1768 **If device has not joined network yet:**
1769 )))
1770
1771 (((
1772 (% style="background-color:#dcdcdc" %)123456
1773 )))
1774
1775 (((
1776 (% style="background-color:#dcdcdc" %)AT+FDR
1777 )))
1778
1779 (((
1780 (% style="background-color:#dcdcdc" %)123456
1781 )))
1782
1783 (((
1784 (% style="background-color:#dcdcdc" %)AT+NJM=0
1785 )))
1786
1787 (((
1788 (% style="background-color:#dcdcdc" %)ATZ
1789 )))
1790
1791
1792 (((
1793 **If device already joined network:**
1794 )))
1795
1796 (((
1797 (% style="background-color:#dcdcdc" %)AT+NJM=0
1798 )))
1799
1800 (((
1801 (% style="background-color:#dcdcdc" %)ATZ
1802
1803
1804 )))
1805
1806
1807
1808 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1809
1810 (((
1811
1812
1813 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1814 )))
1815
1816 (((
1817 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1818 )))
1819
1820 (((
1821 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1822 )))
1823
1824 (((
1825 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1826 )))
1827
1828 (((
1829 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1830 )))
1831
1832 (((
1833 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1834 )))
1835
1836 (((
1837 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1838 )))
1839
1840 (((
1841 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1842 )))
1843
1844 (((
1845 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1846 )))
1847
1848 (((
1849 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1850 )))
1851
1852 (((
1853 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1854 )))
1855
1856 (((
1857 (% 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.
1858 )))
1859
1860 (((
1861 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1862
1863
1864 )))
1865
1866 (((
1867 (% style="color:red" %)**Note:**
1868 )))
1869
1870 (((
1871 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1872 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1873 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.
1874 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
1875 )))
1876
1877 (((
1878 [[image:1653359097980-169.png||height="188" width="729"]]
1879 )))
1880
1881 (((
1882
1883 )))
1884
1885
1886 === 4.2.3 Change to Class A ===
1887
1888 If sensor JOINED
1889 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1890 ATZ
1891
1892
1893 = 5. FAQ =
1894
1895 == 5.1 How to upgrade the image? ==
1896
1897
1898 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1899
1900 * Support new features
1901 * For bug fix
1902 * Change LoRaWAN bands.
1903
1904 Below shows the hardware connection for how to upload an image to the LT:
1905
1906 [[image:1653359603330-121.png]]
1907
1908
1909 (((
1910 (% 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]].
1911 (% 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/]].
1912 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1913
1914
1915 (% style="color:blue" %)**For LT-22222-L**(%%):
1916 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.
1917 )))
1918
1919 [[image:image-20220524103407-12.png]]
1920
1921 [[image:image-20220524103429-13.png]]
1922
1923 [[image:image-20220524104033-15.png]]
1924
1925
1926 (% 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:
1927
1928 [[image:1653360054704-518.png||height="186" width="745"]]
1929
1930
1931 (((
1932 (((
1933
1934
1935 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1936 )))
1937 )))
1938
1939 (((
1940 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1941 )))
1942
1943 (((
1944
1945
1946 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1947 )))
1948
1949 (((
1950 (((
1951 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1952 )))
1953 )))
1954
1955 (((
1956 (((
1957 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1958
1959
1960 )))
1961 )))
1962
1963 (((
1964 (% 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.
1965 )))
1966
1967 (((
1968 [[image:1653360231087-571.png||height="401" width="727"]]
1969 )))
1970
1971 (((
1972 (% 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.
1973 )))
1974
1975
1976 (((
1977 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1978 )))
1979
1980 (((
1981 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1982 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1983 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1984 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1985 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1986 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1987 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1988 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1989 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1990 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1991 )))
1992
1993
1994 (((
1995 As shown in below:
1996 )))
1997
1998 [[image:1653360498588-932.png||height="485" width="726"]]
1999
2000
2001 == 5.4 Can I see counting event in Serial? ==
2002
2003 (((
2004 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.
2005
2006
2007 == 5.5 Can i use point to point communication for LT-22222-L? ==
2008
2009 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2010 )))
2011
2012 (((
2013
2014
2015 = 6. Trouble Shooting =
2016 )))
2017
2018 (((
2019 (((
2020 == 6.1 Downlink doesn’t work, how to solve it? ==
2021 )))
2022 )))
2023
2024 (((
2025 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2026 )))
2027
2028 (((
2029
2030
2031 == 6.2 Have trouble to upload image. ==
2032 )))
2033
2034 (((
2035 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2036 )))
2037
2038 (((
2039
2040
2041 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2042 )))
2043
2044 (((
2045 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2046 )))
2047
2048
2049
2050 = 7. Order Info =
2051
2052
2053 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2054
2055
2056 (% style="color:#4f81bd" %)**XXX:**
2057
2058 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2059 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2060 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2061 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2062 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2063 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2064 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2065 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2066 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2067
2068 = 8. Packing Info =
2069
2070
2071 **Package Includes**:
2072
2073 * LT-22222-L I/O Controller x 1
2074 * Stick Antenna for LoRa RF part x 1
2075 * Bracket for controller x1
2076 * Program cable x 1
2077
2078 **Dimension and weight**:
2079
2080 * Device Size: 13.5 x 7 x 3 cm
2081 * Device Weight: 105g
2082 * Package Size / pcs : 14.5 x 8 x 5 cm
2083 * Weight / pcs : 170g
2084
2085 = 9. Support =
2086
2087 * (((
2088 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.
2089 )))
2090 * (((
2091 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]]
2092 )))
2093
2094 = 10. Reference​​​​​ =
2095
2096 * 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]]
2097 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2098 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2099 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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