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Version 77.54 by Xiaoling on 2022/06/10 09:07
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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 == 1.3 Features ==
166
167 * LoRaWAN Class A & Class C protocol
168 * Optional Customized LoRa Protocol
169 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
170 * AT Commands to change parameters
171 * Remote configure parameters via LoRa Downlink
172 * Firmware upgradable via program port
173 * Counting
174
175 == 1.4  Applications ==
176
177 * Smart Buildings & Home Automation
178 * Logistics and Supply Chain Management
179 * Smart Metering
180 * Smart Agriculture
181 * Smart Cities
182 * Smart Factory
183
184 == 1.5 Hardware Variants ==
185
186 (% border="1" style="background-color:#f7faff; width:500px" %)
187 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
188 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
189 * 2 x Digital Input (Bi-direction)
190 * 2 x Digital Output
191 * 2 x Relay Output (5A@250VAC / 30VDC)
192 * 2 x 0~~20mA Analog Input (res:0.01mA)
193 * 2 x 0~~30V Analog Input (res:0.01v)
194 * 1 x Counting Port
195 )))
196
197 = 2. Power ON Device =
198
199 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.
200
201 (((
202 PWR will on when device is properly powered.
203 )))
204
205 [[image:1653297104069-180.png]]
206
207
208
209 = 3. Operation Mode =
210
211 == 3.1 How it works? ==
212
213 (((
214 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. 
215 )))
216
217 (((
218 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.
219
220
221 )))
222
223
224
225 == 3.2 Example to join LoRaWAN network ==
226
227 (((
228 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. 
229 )))
230
231 [[image:image-20220523172350-1.png||height="266" width="864"]]
232
233 (((
234 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:
235 )))
236
237 (((
238 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
239 )))
240
241 (((
242 Each LT is shipped with a sticker with the default device EUI as below:
243 )))
244
245 [[image:1653297924498-393.png]]
246
247 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
248
249 Add APP EUI in the application.
250
251 [[image:1653297955910-247.png||height="321" width="716"]]
252
253
254 Add APP KEY and DEV EUI
255
256 [[image:1653298023685-319.png]]
257
258
259 (((
260 **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.
261 )))
262
263 [[image:1653298044601-602.png||height="405" width="709"]]
264
265
266
267 == 3.3 Uplink Payload ==
268
269 There are five working modes + one interrupt mode on LT for different type application:
270
271 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
272 * **MOD2**: Double DI Counting + DO + RO
273 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
274 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
275 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
276 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
277
278 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
279
280 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
281
282 [[image:image-20220523174024-3.png]]
283
284 (((
285 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
286 )))
287
288 [[image:image-20220523174254-4.png]]
289
290 * RO is for relay. ROx=1 : close，ROx=0 always open.
291 * DI is for digital input. DIx=1: high or float, DIx=0: low.
292 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
293
294 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
295
296 For example if payload is: [[image:image-20220523175847-2.png]]
297
298 **The value for the interface is:  **
299
300 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
301
302 AVI2 channel voltage is 0x04AC/1000=1.196V
303
304 ACI1 channel current is 0x1310/1000=4.880mA
305
306 ACI2 channel current is 0x1300/1000=4.864mA
307
308 The last byte 0xAA= 10101010(B) means
309
310 * [1] RO1 relay channel is close and the RO1 LED is ON.
311 * [0] RO2 relay channel is open and RO2 LED is OFF;
312
313 **LT22222-L:**
314
315 * [1] DI2 channel is high input and DI2 LED is ON;
316 * [0] DI1 channel is low input;
317
318 * [0] DO3 channel output state
319 ** DO3 is float in case no load between DO3 and V+.;
320 ** DO3 is high in case there is load between DO3 and V+.
321 ** DO3 LED is off in both case
322 * [1] DO2 channel output is low and DO2 LED is ON.
323 * [0] DO1 channel output state
324 ** DO1 is float in case no load between DO1 and V+.;
325 ** DO1 is high in case there is load between DO1 and V+.
326 ** DO1 LED is off in both case
327
328 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
329
330 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
331
332 (((
333 Total : 11 bytes payload
334 )))
335
336 [[image:image-20220523180452-3.png]]
337
338 (((
339 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
340 )))
341
342 [[image:image-20220523180506-4.png]]
343
344 * RO is for relay. ROx=1 : close，ROx=0 always open.
345 * FIRST: Indicate this is the first packet after join network.
346 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
347
348 (((
349 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
350 )))
351
352 (((
353 **To use counting mode, please run:**
354 )))
355
356 (% class="box infomessage" %)
357 (((
358 (((
359 **AT+MOD=2**
360 )))
361 )))
362
363 (% class="box infomessage" %)
364 (((
365 (((
366 **ATZ**
367 )))
368 )))
369
370 (((
371 (% style="color:#4f81bd" %)**AT Commands for counting:**
372 )))
373
374 (((
375 **For LT22222-L:**
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
382 )))
383 )))
384
385 (% class="box infomessage" %)
386 (((
387 (((
388 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
389 )))
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
396 )))
397 )))
398
399 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
403 )))
404 )))
405
406 (% class="box infomessage" %)
407 (((
408 (((
409 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
410 )))
411 )))
412
413 (% class="box infomessage" %)
414 (((
415 (((
416 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
417 )))
418 )))
419
420
421
422 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
423
424 **LT22222-L**: This mode the DI1 is used as a counting pin.
425
426 [[image:image-20220523181246-5.png]]
427
428 (((
429 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
430 )))
431
432 [[image:image-20220523181301-6.png]]
433
434 * RO is for relay. ROx=1 : close，ROx=0 always open.
435 * FIRST: Indicate this is the first packet after join network.
436 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
437
438 (((
439 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
440 )))
441
442 (((
443 **To use counting mode, please run:**
444 )))
445
446 (% class="box infomessage" %)
447 (((
448 (((
449 **AT+MOD=3**
450 )))
451 )))
452
453 (% class="box infomessage" %)
454 (((
455 (((
456 **ATZ**
457 )))
458 )))
459
460 (((
461 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
462
463
464 )))
465
466
467
468 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
469
470 **LT22222-L**: This mode the DI1 is used as a counting pin.
471
472 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.
473
474 [[image:image-20220523181903-8.png]]
475
476 (((
477 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
478 )))
479
480 [[image:image-20220523181727-7.png]]
481
482 * RO is for relay. ROx=1 : close，ROx=0 always open.
483 * FIRST: Indicate this is the first packet after join network.
484 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
485
486 (((
487 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
488 )))
489
490 (((
491 **To use this mode, please run:**
492 )))
493
494 (% class="box infomessage" %)
495 (((
496 (((
497 **AT+MOD=4**
498 )))
499 )))
500
501 (% class="box infomessage" %)
502 (((
503 (((
504 **ATZ**
505 )))
506 )))
507
508 (((
509
510 )))
511
512 (((
513 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
514 )))
515
516 (((
517 **Plus below command for AVI1 Counting:**
518 )))
519
520 (% class="box infomessage" %)
521 (((
522 (((
523 **AT+SETCNT=3,60   (set AVI Count to 60)**
524 )))
525 )))
526
527 (% class="box infomessage" %)
528 (((
529 (((
530 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
531 )))
532 )))
533
534 (% class="box infomessage" %)
535 (((
536 (((
537 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
538 )))
539 )))
540
541 (% class="box infomessage" %)
542 (((
543 (((
544 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
545 )))
546 )))
547
548
549
550 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
551
552 **LT22222-L**: This mode the DI1 is used as a counting pin.
553
554 [[image:image-20220523182334-9.png]]
555
556 (((
557 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
558 )))
559
560 * RO is for relay. ROx=1 : close，ROx=0 always open.
561 * FIRST: Indicate this is the first packet after join network.
562 * (((
563 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
564 )))
565
566 (((
567 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
568 )))
569
570 (((
571 **To use this mode, please run:**
572 )))
573
574 (% class="box infomessage" %)
575 (((
576 (((
577 **AT+MOD=5**
578 )))
579 )))
580
581 (% class="box infomessage" %)
582 (((
583 (((
584 **ATZ**
585 )))
586 )))
587
588 (((
589 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
590
591
592 )))
593
594
595
596 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
597
598 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
599
600 For example, if user has configured below commands:
601
602 * **AT+MOD=1 ** **~-~->** The normal working mode
603 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
604
605 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
606
607 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
608 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.**
609
610 **AT Command to set Trigger Condition**:
611
612 (% style="color:#4f81bd" %)**Trigger base on voltage**:
613
614 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
615
616 **Example:**
617
618 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)
619
620 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
621
622
623 (% style="color:#4f81bd" %)**Trigger base on current**:
624
625 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
626
627 **Example:**
628
629 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
630
631
632 (% style="color:#4f81bd" %)**Trigger base on DI status**:
633
634 DI status trigger Flag.
635
636 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
637
638 **Example:**
639
640 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
641
642
643 **Downlink Command to set Trigger Condition**
644
645 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
646
647 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
648
649 AA: Code for this downlink Command:
650
651 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
652
653 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
654
655 yy2 yy2: AC1 or AV1 high limit.
656
657 yy3 yy3: AC2 or AV2 low limit.
658
659 Yy4 yy4: AC2 or AV2 high limit.
660
661 **Example1**: AA 00 13 88 00 00 00 00 00 00
662
663 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
664
665 **Example2**: AA 02 01 00
666
667 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
668
669 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
670
671 MOD6 Payload : total 11 bytes payload
672
673 [[image:image-20220524085923-1.png]]
674
675 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
676
677 [[image:image-20220524090106-2.png]]
678
679 * Each bits shows if the corresponding trigger has been configured.
680
681 **Example:**
682
683 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
684
685
686 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
687
688 [[image:image-20220524090249-3.png]]
689
690 * Each bits shows which status has been trigger on this uplink.
691
692 **Example:**
693
694 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
695
696
697 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
698
699 [[image:image-20220524090456-4.png]]
700
701 * Each bits shows which status has been trigger on this uplink.
702
703 **Example:**
704
705 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
706
707 00000101: Means both DI1 and DI2 trigger are enabled.
708
709
710 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
711
712 Downlink command to poll MOD6 status:
713
714 **AB 06**
715
716 When device got this command, it will send the MOD6 payload.
717
718
719
720 === 3.3.7 Payload Decoder ===
721
722 (((
723 **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/]]
724
725
726 )))
727
728
729
730 == 3.4 ​Configure LT via AT or Downlink ==
731
732 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
733
734 (((
735 There are two kinds of Commands:
736 )))
737
738 * (% 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]]
739
740 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
741
742 === 3.4.1 Common Commands ===
743
744 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]]
745
746
747
748 === 3.4.2 Sensor related commands ===
749
750 ==== 3.4.2.1 Set Transmit Interval ====
751
752 Set device uplink interval.
753
754 * AT Command:
755
756 (% class="box infomessage" %)
757 (((
758 **AT+TDC=N **
759 )))
760
761 **Example: **AT+TDC=30000. Means set interval to 30 seconds
762
763 * Downlink Payload (prefix 0x01):
764
765 (% class="box infomessage" %)
766 (((
767 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
768 )))
769
770
771
772 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
773
774 Set work mode.
775
776 * AT Command:
777
778 (% class="box infomessage" %)
779 (((
780 **AT+MOD=N  **
781 )))
782
783 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
784
785 * Downlink Payload (prefix 0x0A):
786
787 (% class="box infomessage" %)
788 (((
789 **0x0A aa     ~/~/ Same as AT+MOD=aa**
790 )))
791
792
793
794 ==== 3.4.2.3 Poll an uplink ====
795
796 * AT Command:
797
798 There is no AT Command to poll uplink
799
800 * Downlink Payload (prefix 0x08):
801
802 (% class="box infomessage" %)
803 (((
804 **0x08 FF     ~/~/ Poll an uplink,**
805 )))
806
807 **Example**: 0x08FF, ask device to send an Uplink
808
809
810
811 ==== 3.4.2.4 Enable Trigger Mode ====
812
813 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
814
815 * AT Command:
816
817 (% class="box infomessage" %)
818 (((
819 **AT+ADDMOD6=1 or 0**
820 )))
821
822 1: Enable Trigger Mode
823
824 0: Disable Trigger Mode
825
826 * Downlink Payload (prefix 0x0A 06):
827
828 (% class="box infomessage" %)
829 (((
830 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
831 )))
832
833
834
835 ==== 3.4.2.5 Poll trigger settings ====
836
837 Poll trigger settings,
838
839 * AT Command:
840
841 There is no AT Command for this feature.
842
843 * Downlink Payload (prefix 0x AB 06):
844
845 (% class="box infomessage" %)
846 (((
847 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
848 )))
849
850
851
852 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
853
854 Enable Disable DI1/DI2/DI2 as trigger,
855
856 * AT Command:
857
858 (% class="box infomessage" %)
859 (((
860 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
861 )))
862
863 **Example:**
864
865 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
866
867 * Downlink Payload (prefix 0xAA 02):
868
869 (% class="box infomessage" %)
870 (((
871 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
872 )))
873
874
875
876 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
877
878 Set DI1 or DI3(for LT-33222-L) trigger.
879
880 * AT Command:
881
882 (% class="box infomessage" %)
883 (((
884 **AT+TRIG1=a,b**
885 )))
886
887 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
888
889 b : delay timing.
890
891 **Example:**
892
893 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
894
895 * Downlink Payload (prefix 0x09 01 ):
896
897 (% class="box infomessage" %)
898 (((
899 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
900 )))
901
902
903
904 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
905
906 Set DI2 trigger.
907
908 * AT Command:
909
910 (% class="box infomessage" %)
911 (((
912 **AT+TRIG2=a,b**
913 )))
914
915 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
916
917 b : delay timing.
918
919 **Example:**
920
921 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
922
923 * Downlink Payload (prefix 0x09 02 ):
924
925 (% class="box infomessage" %)
926 (((
927 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
928 )))
929
930
931
932 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
933
934 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
935
936 * AT Command:
937
938 (% class="box infomessage" %)
939 (((
940 **AT+ACLIM. **
941 )))
942
943 * Downlink Payload (prefix 0xAA 01 ):
944
945 (% class="box infomessage" %)
946 (((
947 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
948 )))
949
950
951
952 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
953
954 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
955
956 * AT Command:
957
958 (% class="box infomessage" %)
959 (((
960 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
961 )))
962
963 * Downlink Payload (prefix 0xAA 00 ):
964
965 (% class="box infomessage" %)
966 (((
967 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
968 )))
969
970
971
972 ==== 3.4.2.11 Trigger – Set minimum interval ====
973
974 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
975
976 * AT Command:
977
978 (% class="box infomessage" %)
979 (((
980 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
981 )))
982
983 * Downlink Payload (prefix 0xAC ):
984
985 (% class="box infomessage" %)
986 (((
987 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
988 )))
989
990
991
992 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
993
994 * AT Command:
995
996 There is no AT Command to control Digital Output
997
998 * Downlink Payload (prefix 0x02):
999
1000 (% class="box infomessage" %)
1001 (((
1002 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1003 )))
1004
1005 (((
1006 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1007 )))
1008
1009 (((
1010 01: Low,  00: High ,  11: No action
1011 )))
1012
1013 [[image:image-20220524092754-5.png]]
1014
1015 (((
1016 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1017 )))
1018
1019 (((
1020 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1021 )))
1022
1023
1024
1025 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1026
1027 * AT Command:
1028
1029 There is no AT Command to control Digital Output
1030
1031 * Downlink Payload (prefix 0xA9):
1032
1033 (% class="box infomessage" %)
1034 (((
1035 (((
1036 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1037 )))
1038 )))
1039
1040 This is to control the digital output time of DO pin. Include four bytes:
1041
1042 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1043
1044 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1045
1046 01: DO pins will change back to original state after timeout.
1047
1048 00: DO pins will change to an inverter state after timeout 
1049
1050 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1051
1052 [[image:image-20220524093238-6.png]]
1053
1054 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1055
1056 [[image:image-20220524093328-7.png]]
1057
1058 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1059
1060 [[image:image-20220524093351-8.png]]
1061
1062 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1063
1064 Latching time. Unit: ms
1065
1066 Device will upload a packet if downlink code executes successfully.
1067
1068 **Example payload:**
1069
1070 **~1. A9 01 01 01 01 07 D0**
1071
1072 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1073
1074 **2. A9 01 00 01 11 07 D0**
1075
1076 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1077
1078 **3. A9 00 00 00 00 07 D0**
1079
1080 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1081
1082 **4. A9 00 11 01 00 07 D0**
1083
1084 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
1085
1086
1087
1088 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1089
1090 * AT Command:
1091
1092 There is no AT Command to control Relay Output
1093
1094 * Downlink Payload (prefix 0x03):
1095
1096 (% class="box infomessage" %)
1097 (((
1098 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1099 )))
1100
1101 (((
1102 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1103 )))
1104
1105 (((
1106 01: Close ,  00: Open , 11: No action
1107 )))
1108
1109 (((
1110 [[image:image-20220524093724-9.png]]
1111 )))
1112
1113 Device will upload a packet if downlink code executes successfully.
1114
1115
1116
1117 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1118
1119 * AT Command:
1120
1121 There is no AT Command to control Relay Output
1122
1123 * Downlink Payload (prefix 0x05):
1124
1125 (% class="box infomessage" %)
1126 (((
1127 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1128 )))
1129
1130 This is to control the relay output time of relay. Include four bytes:
1131
1132 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1133
1134 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1135
1136 01: Relays will change back to original state after timeout.
1137
1138 00: Relays will change to an inverter state after timeout
1139
1140 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1141
1142 [[image:image-20220524093831-10.png]]
1143
1144 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1145
1146 Device will upload a packet if downlink code executes successfully.
1147
1148 **Example payload:**
1149
1150 **~1. 05 01 11 07 D0**
1151
1152 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1153
1154 **2. 05 01 10 07 D0**
1155
1156 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1157
1158 **3. 05 00 01 07 D0**
1159
1160 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1161
1162 **4. 05 00 00 07 D0**
1163
1164 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1165
1166
1167
1168 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1169
1170 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1171
1172 * AT Command:
1173
1174 (% class="box infomessage" %)
1175 (((
1176 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1177 )))
1178
1179 * Downlink Payload (prefix 0xA5):
1180
1181 (% class="box infomessage" %)
1182 (((
1183 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1184 )))
1185
1186
1187
1188 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1189
1190 * AT Command:
1191
1192 (% class="box infomessage" %)
1193 (((
1194 **AT+SETCNT=aa,(bb cc dd ee) **
1195 )))
1196
1197 aa: 1: Set count1,
1198
1199 2: Set count2,
1200
1201 3: Set AV1 count
1202
1203 Bb cc dd ee: number to be set
1204
1205 * Downlink Payload (prefix 0xA8):
1206
1207 (% class="box infomessage" %)
1208 (((
1209 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1210 )))
1211
1212
1213
1214 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1215
1216 Clear counting for counting mode
1217
1218 * AT Command:
1219
1220 (% class="box infomessage" %)
1221 (((
1222 **AT+CLRCOUNT ~/~/ clear all counting**
1223 )))
1224
1225 * Downlink Payload (prefix 0xA6):
1226
1227 (% class="box infomessage" %)
1228 (((
1229 **0x A6 01     ~/~/ clear all counting,**
1230 )))
1231
1232
1233
1234 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1235
1236 * AT Command:
1237
1238 (% class="box infomessage" %)
1239 (((
1240 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1241 )))
1242
1243 * Downlink Payload (prefix 0xA7):
1244
1245 (% class="box infomessage" %)
1246 (((
1247 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1248 )))
1249
1250 (((
1251 range: aa bb cc:0 to 16777215,  (unit:second)
1252
1253
1254 )))
1255
1256
1257
1258 == 3.5 Integrate with Mydevice ==
1259
1260 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:
1261
1262 (((
1263 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1264 )))
1265
1266 (((
1267 **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:
1268 )))
1269
1270 [[image:1653356737703-362.png||height="232" width="732"]]
1271
1272 [[image:image-20220524094641-11.png||height="390" width="723"]]
1273
1274 [[image:image-20220524094641-12.png||height="402" width="718"]]
1275
1276
1277 **Step 3**: Create an account or log in Mydevices.
1278
1279 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1280
1281 Search under The things network
1282
1283 [[image:1653356838789-523.png||height="337" width="740"]]
1284
1285
1286 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1287
1288 [[image:image-20220524094909-1.png||height="335" width="729"]]
1289
1290 [[image:image-20220524094909-2.png||height="337" width="729"]]
1291
1292 [[image:image-20220524094909-3.png||height="338" width="727"]]
1293
1294 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1295
1296 [[image:image-20220524094909-5.png||height="341" width="734"]]
1297
1298
1299
1300 == 3.6 Interface Detail ==
1301
1302 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1303
1304 Support NPN Type sensor
1305
1306 [[image:1653356991268-289.png]]
1307
1308
1309
1310 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1311
1312 (((
1313 The DI port of LT-22222-L can support NPN or PNP output sensor.
1314 )))
1315
1316 (((
1317 (((
1318 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
1319 )))
1320 )))
1321
1322 [[image:1653357170703-587.png]]
1323
1324 (((
1325 (((
1326 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1327 )))
1328 )))
1329
1330 (((
1331
1332 )))
1333
1334 (((
1335 **Example1**: Connect to a Low active sensor.
1336 )))
1337
1338 (((
1339 This type of sensor will output a low signal GND when active.
1340 )))
1341
1342 * (((
1343 Connect sensor’s output to DI1-
1344 )))
1345 * (((
1346 Connect sensor’s VCC to DI1+.
1347 )))
1348
1349 (((
1350 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1351 )))
1352
1353 (((
1354 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1355 )))
1356
1357 (((
1358 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.
1359 )))
1360
1361 (((
1362
1363 )))
1364
1365 (((
1366 **Example2**: Connect to a High active sensor.
1367 )))
1368
1369 (((
1370 This type of sensor will output a high signal (example 24v) when active.
1371 )))
1372
1373 * (((
1374 Connect sensor’s output to DI1+
1375 )))
1376 * (((
1377 Connect sensor’s GND DI1-.
1378 )))
1379
1380 (((
1381 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1382 )))
1383
1384 (((
1385 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1386 )))
1387
1388 (((
1389 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.
1390 )))
1391
1392 (((
1393
1394 )))
1395
1396 (((
1397 **Example3**: Connect to a 220v high active sensor.
1398 )))
1399
1400 (((
1401 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1402 )))
1403
1404 * (((
1405 Connect sensor’s output to DI1+ with a serial 50K resistor
1406 )))
1407 * (((
1408 Connect sensor’s GND DI1-.
1409 )))
1410
1411 (((
1412 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1413 )))
1414
1415 (((
1416 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1417 )))
1418
1419 (((
1420 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.
1421 )))
1422
1423
1424
1425 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1426
1427 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1428
1429 [[image:1653357531600-905.png]]
1430
1431
1432
1433 === 3.6.4 Analog Input Interface ===
1434
1435 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:
1436
1437 **AC2 = (IN2 voltage )/12**
1438
1439 [[image:1653357592296-182.png]]
1440
1441 Example to connect a 4~~20mA sensor
1442
1443 We take the wind speed sensor as an example for reference only.
1444
1445 Specifications of the wind speed sensor:
1446
1447 Red:12~~24v
1448
1449 Yellow:4~~20mA
1450
1451 Black:GND
1452
1453
1454 Connection diagram:
1455
1456 [[image:1653357640609-758.png]]
1457
1458 [[image:1653357648330-671.png||height="155" width="733"]]
1459
1460
1461
1462 === 3.6.5 Relay Output ===
1463
1464 (((
1465 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:
1466 )))
1467
1468 [[image:image-20220524100215-9.png]]
1469
1470 [[image:image-20220524100215-10.png||height="382" width="723"]]
1471
1472
1473
1474 == 3.7 LEDs Indicators ==
1475
1476 [[image:image-20220524100748-11.png]]
1477
1478
1479 = 4. Use AT Command =
1480
1481 == 4.1 Access AT Command ==
1482
1483 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.
1484
1485 [[image:1653358238933-385.png]]
1486
1487
1488 (((
1489 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:
1490 )))
1491
1492 [[image:1653358355238-883.png]]
1493
1494
1495 (((
1496 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/]]
1497 )))
1498
1499 (((
1500 AT+<CMD>?        : Help on <CMD>
1501 )))
1502
1503 (((
1504 AT+<CMD>         : Run <CMD>
1505 )))
1506
1507 (((
1508 AT+<CMD>=<value> : Set the value
1509 )))
1510
1511 (((
1512 AT+<CMD>=?       : Get the value
1513 )))
1514
1515 (((
1516 ATZ: Trig a reset of the MCU
1517 )))
1518
1519 (((
1520 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1521 )))
1522
1523 (((
1524 AT+DEUI: Get or Set the Device EUI
1525 )))
1526
1527 (((
1528 AT+DADDR: Get or Set the Device Address
1529 )))
1530
1531 (((
1532 AT+APPKEY: Get or Set the Application Key
1533 )))
1534
1535 (((
1536 AT+NWKSKEY: Get or Set the Network Session Key
1537 )))
1538
1539 (((
1540 AT+APPSKEY: Get or Set the Application Session Key
1541 )))
1542
1543 (((
1544 AT+APPEUI: Get or Set the Application EUI
1545 )))
1546
1547 (((
1548 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1549 )))
1550
1551 (((
1552 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1553 )))
1554
1555 (((
1556 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1557 )))
1558
1559 (((
1560 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1561 )))
1562
1563 (((
1564 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1565 )))
1566
1567 (((
1568 AT+RX2FQ: Get or Set the Rx2 window frequency
1569 )))
1570
1571 (((
1572 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1573 )))
1574
1575 (((
1576 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1577 )))
1578
1579 (((
1580 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1581 )))
1582
1583 (((
1584 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1585 )))
1586
1587 (((
1588 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1589 )))
1590
1591 (((
1592 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1593 )))
1594
1595 (((
1596 AT+NWKID: Get or Set the Network ID
1597 )))
1598
1599 (((
1600 AT+FCU: Get or Set the Frame Counter Uplink
1601 )))
1602
1603 (((
1604 AT+FCD: Get or Set the Frame Counter Downlink
1605 )))
1606
1607 (((
1608 AT+CLASS: Get or Set the Device Class
1609 )))
1610
1611 (((
1612 AT+JOIN: Join network
1613 )))
1614
1615 (((
1616 AT+NJS: Get OTAA Join Status
1617 )))
1618
1619 (((
1620 AT+SENDB: Send hexadecimal data along with the application port
1621 )))
1622
1623 (((
1624 AT+SEND: Send text data along with the application port
1625 )))
1626
1627 (((
1628 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1629 )))
1630
1631 (((
1632 AT+RECV: Print last received data in raw format
1633 )))
1634
1635 (((
1636 AT+VER: Get current image version and Frequency Band
1637 )))
1638
1639 (((
1640 AT+CFM: Get or Set the confirmation mode (0-1)
1641 )))
1642
1643 (((
1644 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1645 )))
1646
1647 (((
1648 AT+SNR: Get the SNR of the last received packet
1649 )))
1650
1651 (((
1652 AT+RSSI: Get the RSSI of the last received packet
1653 )))
1654
1655 (((
1656 AT+TDC: Get or set the application data transmission interval in ms
1657 )))
1658
1659 (((
1660 AT+PORT: Get or set the application port
1661 )))
1662
1663 (((
1664 AT+DISAT: Disable AT commands
1665 )))
1666
1667 (((
1668 AT+PWORD: Set password, max 9 digits
1669 )))
1670
1671 (((
1672 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1673 )))
1674
1675 (((
1676 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1677 )))
1678
1679 (((
1680 AT+CFG: Print all settings
1681
1682
1683 )))
1684
1685
1686
1687 == 4.2 Common AT Command Sequence ==
1688
1689 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1690
1691 (((
1692
1693
1694 **If device has not joined network yet:**
1695 )))
1696
1697 (((
1698 (% style="background-color:#dcdcdc" %)123456
1699 )))
1700
1701 (((
1702 (% style="background-color:#dcdcdc" %)AT+FDR
1703 )))
1704
1705 (((
1706 (% style="background-color:#dcdcdc" %)123456
1707 )))
1708
1709 (((
1710 (% style="background-color:#dcdcdc" %)AT+NJM=0
1711 )))
1712
1713 (((
1714 (% style="background-color:#dcdcdc" %)ATZ
1715 )))
1716
1717
1718 (((
1719 **If device already joined network:**
1720 )))
1721
1722 (((
1723 (% style="background-color:#dcdcdc" %)AT+NJM=0
1724 )))
1725
1726 (((
1727 (% style="background-color:#dcdcdc" %)ATZ
1728
1729
1730 )))
1731
1732
1733
1734 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1735
1736 (((
1737
1738
1739 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1740 )))
1741
1742 (((
1743 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1744 )))
1745
1746 (((
1747 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1748 )))
1749
1750 (((
1751 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1752 )))
1753
1754 (((
1755 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1756 )))
1757
1758 (((
1759 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1760 )))
1761
1762 (((
1763 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1764 )))
1765
1766 (((
1767 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1768 )))
1769
1770 (((
1771 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1772 )))
1773
1774 (((
1775 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1776 )))
1777
1778 (((
1779 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1780 )))
1781
1782 (((
1783 (% 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.
1784 )))
1785
1786 (((
1787 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1788
1789
1790 )))
1791
1792 (((
1793 (% style="color:red" %)**Note:**
1794 )))
1795
1796 (((
1797 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1798 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1799 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.
1800 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
1801 )))
1802
1803 (((
1804 [[image:1653359097980-169.png||height="188" width="729"]]
1805 )))
1806
1807 (((
1808
1809 )))
1810
1811
1812 === 4.2.3 Change to Class A ===
1813
1814 If sensor JOINED
1815 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1816 ATZ
1817
1818
1819 = 5. FAQ =
1820
1821 == 5.1 How to upgrade the image? ==
1822
1823
1824 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1825
1826 * Support new features
1827 * For bug fix
1828 * Change LoRaWAN bands.
1829
1830 Below shows the hardware connection for how to upload an image to the LT:
1831
1832 [[image:1653359603330-121.png]]
1833
1834
1835 (((
1836 (% 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]].
1837 (% 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/]].
1838 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1839
1840
1841 (% style="color:blue" %)**For LT-22222-L**(%%):
1842 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.
1843 )))
1844
1845 [[image:image-20220524103407-12.png]]
1846
1847 [[image:image-20220524103429-13.png]]
1848
1849 [[image:image-20220524104033-15.png]]
1850
1851
1852 (% 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:
1853
1854 [[image:1653360054704-518.png||height="186" width="745"]]
1855
1856
1857 (((
1858 (((
1859
1860
1861 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1862 )))
1863 )))
1864
1865 (((
1866 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1867 )))
1868
1869 (((
1870
1871
1872 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1873 )))
1874
1875 (((
1876 (((
1877 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1878 )))
1879 )))
1880
1881 (((
1882 (((
1883 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1884
1885
1886 )))
1887 )))
1888
1889 (((
1890 (% 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.
1891 )))
1892
1893 (((
1894 [[image:1653360231087-571.png||height="401" width="727"]]
1895 )))
1896
1897 (((
1898 (% 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.
1899 )))
1900
1901
1902 (((
1903 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1904 )))
1905
1906 (((
1907 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1908 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1909 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1910 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1911 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1912 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1913 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1914 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1915 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1916 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1917 )))
1918
1919
1920 (((
1921 As shown in below:
1922 )))
1923
1924 [[image:1653360498588-932.png||height="485" width="726"]]
1925
1926
1927 == 5.4 Can I see counting event in Serial? ==
1928
1929 (((
1930 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.
1931
1932
1933 == 5.5 Can i use point to point communication for LT-22222-L? ==
1934
1935 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1936 )))
1937
1938 (((
1939
1940
1941 = 6. Trouble Shooting =
1942 )))
1943
1944 (((
1945 (((
1946 == 6.1 Downlink doesn’t work, how to solve it? ==
1947 )))
1948 )))
1949
1950 (((
1951 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1952 )))
1953
1954 (((
1955
1956
1957 == 6.2 Have trouble to upload image. ==
1958 )))
1959
1960 (((
1961 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1962 )))
1963
1964 (((
1965
1966
1967 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1968 )))
1969
1970 (((
1971 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1972 )))
1973
1974
1975
1976 = 7. Order Info =
1977
1978
1979 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1980
1981
1982 (% style="color:#4f81bd" %)**XXX:**
1983
1984 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1985 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1986 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1987 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1988 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1989 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1990 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1991 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1992 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1993
1994
1995 = 8. Packing Info =
1996
1997
1998 **Package Includes**:
1999
2000 * LT-22222-L I/O Controller x 1
2001 * Stick Antenna for LoRa RF part x 1
2002 * Bracket for controller x1
2003 * Program cable x 1
2004
2005 **Dimension and weight**:
2006
2007 * Device Size: 13.5 x 7 x 3 cm
2008 * Device Weight: 105g
2009 * Package Size / pcs : 14.5 x 8 x 5 cm
2010 * Weight / pcs : 170g
2011
2012
2013 = 9. Support =
2014
2015 * (((
2016 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.
2017 )))
2018 * (((
2019 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]]
2020 )))
2021
2022
2023 = 10. Reference​​​​​ =
2024
2025 * 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]]
2026 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2027 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2028 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]