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Version 77.72 by Xiaoling on 2022/06/10 09:23
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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
670 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
671
672 MOD6 Payload : total 11 bytes payload
673
674 [[image:image-20220524085923-1.png]]
675
676
677 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
678
679 [[image:image-20220524090106-2.png]]
680
681 * Each bits shows if the corresponding trigger has been configured.
682
683
684 **Example:**
685
686 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
687
688
689 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
690
691 [[image:image-20220524090249-3.png]]
692
693 * Each bits shows which status has been trigger on this uplink.
694
695 **Example:**
696
697 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
698
699
700 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
701
702 [[image:image-20220524090456-4.png]]
703
704 * Each bits shows which status has been trigger on this uplink.
705
706 **Example:**
707
708 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
709
710 00000101: Means both DI1 and DI2 trigger are enabled.
711
712
713 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
714
715 Downlink command to poll MOD6 status:
716
717 **AB 06**
718
719 When device got this command, it will send the MOD6 payload.
720
721
722
723 === 3.3.7 Payload Decoder ===
724
725 (((
726 **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/]]
727
728
729 )))
730
731
732
733 == 3.4 ​Configure LT via AT or Downlink ==
734
735 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
736
737 (((
738 There are two kinds of Commands:
739 )))
740
741 * (% 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]]
742
743 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
744
745
746
747 === 3.4.1 Common Commands ===
748
749 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]]
750
751
752
753 === 3.4.2 Sensor related commands ===
754
755 ==== 3.4.2.1 Set Transmit Interval ====
756
757 Set device uplink interval.
758
759 * AT Command:
760
761 (% class="box infomessage" %)
762 (((
763 **AT+TDC=N **
764 )))
765
766 **Example: **AT+TDC=30000. Means set interval to 30 seconds
767
768
769 * Downlink Payload (prefix 0x01):
770
771 (% class="box infomessage" %)
772 (((
773 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
774 )))
775
776
777
778 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
779
780 Set work mode.
781
782 * AT Command:
783
784 (% class="box infomessage" %)
785 (((
786 **AT+MOD=N  **
787 )))
788
789 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
790
791
792 * Downlink Payload (prefix 0x0A):
793
794 (% class="box infomessage" %)
795 (((
796 **0x0A aa     ~/~/ Same as AT+MOD=aa**
797 )))
798
799
800
801 ==== 3.4.2.3 Poll an uplink ====
802
803 * AT Command:
804
805 There is no AT Command to poll uplink
806
807
808 * Downlink Payload (prefix 0x08):
809
810 (% class="box infomessage" %)
811 (((
812 **0x08 FF     ~/~/ Poll an uplink,**
813 )))
814
815 **Example**: 0x08FF, ask device to send an Uplink
816
817
818
819 ==== 3.4.2.4 Enable Trigger Mode ====
820
821 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
822
823 * AT Command:
824
825 (% class="box infomessage" %)
826 (((
827 **AT+ADDMOD6=1 or 0**
828 )))
829
830 1: Enable Trigger Mode
831
832 0: Disable Trigger Mode
833
834
835 * Downlink Payload (prefix 0x0A 06):
836
837 (% class="box infomessage" %)
838 (((
839 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
840 )))
841
842
843
844 ==== 3.4.2.5 Poll trigger settings ====
845
846 Poll trigger settings,
847
848 * AT Command:
849
850 There is no AT Command for this feature.
851
852
853 * Downlink Payload (prefix 0x AB 06):
854
855 (% class="box infomessage" %)
856 (((
857 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
858 )))
859
860
861
862 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
863
864 Enable Disable DI1/DI2/DI2 as trigger,
865
866 * AT Command:
867
868 (% class="box infomessage" %)
869 (((
870 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
871 )))
872
873
874 **Example:**
875
876 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
877
878 * Downlink Payload (prefix 0xAA 02):
879
880 (% class="box infomessage" %)
881 (((
882 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
883 )))
884
885
886
887 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
888
889 Set DI1 or DI3(for LT-33222-L) trigger.
890
891 * AT Command:
892
893 (% class="box infomessage" %)
894 (((
895 **AT+TRIG1=a,b**
896 )))
897
898 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
899
900 b : delay timing.
901
902
903 **Example:**
904
905 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
906
907
908 * Downlink Payload (prefix 0x09 01 ):
909
910 (% class="box infomessage" %)
911 (((
912 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
913 )))
914
915
916
917 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
918
919 Set DI2 trigger.
920
921 * AT Command:
922
923 (% class="box infomessage" %)
924 (((
925 **AT+TRIG2=a,b**
926 )))
927
928 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
929
930 b : delay timing.
931
932
933 **Example:**
934
935 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
936
937
938 * Downlink Payload (prefix 0x09 02 ):
939
940 (% class="box infomessage" %)
941 (((
942 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
943 )))
944
945
946
947 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
948
949 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
950
951 * AT Command:
952
953 (% class="box infomessage" %)
954 (((
955 **AT+ACLIM. **
956 )))
957
958
959 * Downlink Payload (prefix 0xAA 01 ):
960
961 (% class="box infomessage" %)
962 (((
963 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
964 )))
965
966
967
968 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
969
970 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
971
972 * AT Command:
973
974 (% class="box infomessage" %)
975 (((
976 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
977 )))
978
979
980 * Downlink Payload (prefix 0xAA 00 ):
981
982 (% class="box infomessage" %)
983 (((
984 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
985 )))
986
987
988
989 ==== 3.4.2.11 Trigger – Set minimum interval ====
990
991 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
992
993 * AT Command:
994
995 (% class="box infomessage" %)
996 (((
997 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
998 )))
999
1000
1001 * Downlink Payload (prefix 0xAC ):
1002
1003 (% class="box infomessage" %)
1004 (((
1005 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1006 )))
1007
1008
1009
1010 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1011
1012 * AT Command:
1013
1014 There is no AT Command to control Digital Output
1015
1016
1017 * Downlink Payload (prefix 0x02):
1018
1019 (% class="box infomessage" %)
1020 (((
1021 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1022 )))
1023
1024 (((
1025 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1026 )))
1027
1028 (((
1029 01: Low,  00: High ,  11: No action
1030 )))
1031
1032 [[image:image-20220524092754-5.png]]
1033
1034 (((
1035 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1036 )))
1037
1038 (((
1039 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1040 )))
1041
1042
1043
1044 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1045
1046 * AT Command:
1047
1048 There is no AT Command to control Digital Output
1049
1050
1051 * Downlink Payload (prefix 0xA9):
1052
1053 (% class="box infomessage" %)
1054 (((
1055 (((
1056 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1057 )))
1058 )))
1059
1060 This is to control the digital output time of DO pin. Include four bytes:
1061
1062 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1063
1064 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1065
1066 01: DO pins will change back to original state after timeout.
1067
1068 00: DO pins will change to an inverter state after timeout 
1069
1070
1071 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1072
1073 [[image:image-20220524093238-6.png]]
1074
1075
1076 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1077
1078 [[image:image-20220524093328-7.png]]
1079
1080
1081 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1082
1083 [[image:image-20220524093351-8.png]]
1084
1085
1086 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1087
1088 Latching time. Unit: ms
1089
1090 Device will upload a packet if downlink code executes successfully.
1091
1092
1093 **Example payload:**
1094
1095 **~1. A9 01 01 01 01 07 D0**
1096
1097 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1098
1099 **2. A9 01 00 01 11 07 D0**
1100
1101 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1102
1103 **3. A9 00 00 00 00 07 D0**
1104
1105 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1106
1107 **4. A9 00 11 01 00 07 D0**
1108
1109 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
1110
1111
1112
1113 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1114
1115 * AT Command:
1116
1117 There is no AT Command to control Relay Output
1118
1119
1120 * Downlink Payload (prefix 0x03):
1121
1122 (% class="box infomessage" %)
1123 (((
1124 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1125 )))
1126
1127 (((
1128 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1129 )))
1130
1131 (((
1132 01: Close ,  00: Open , 11: No action
1133 )))
1134
1135 (((
1136 [[image:image-20220524093724-9.png]]
1137 )))
1138
1139 Device will upload a packet if downlink code executes successfully.
1140
1141
1142
1143 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1144
1145 * AT Command:
1146
1147 There is no AT Command to control Relay Output
1148
1149
1150 * Downlink Payload (prefix 0x05):
1151
1152 (% class="box infomessage" %)
1153 (((
1154 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1155 )))
1156
1157 This is to control the relay output time of relay. Include four bytes:
1158
1159 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1160
1161 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1162
1163 01: Relays will change back to original state after timeout.
1164
1165 00: Relays will change to an inverter state after timeout
1166
1167
1168 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1169
1170 [[image:image-20220524093831-10.png]]
1171
1172
1173 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1174
1175 Device will upload a packet if downlink code executes successfully.
1176
1177
1178 **Example payload:**
1179
1180 **~1. 05 01 11 07 D0**
1181
1182 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1183
1184 **2. 05 01 10 07 D0**
1185
1186 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1187
1188 **3. 05 00 01 07 D0**
1189
1190 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1191
1192 **4. 05 00 00 07 D0**
1193
1194 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1195
1196
1197
1198 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1199
1200 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1201
1202 * AT Command:
1203
1204 (% class="box infomessage" %)
1205 (((
1206 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1207 )))
1208
1209
1210 * Downlink Payload (prefix 0xA5):
1211
1212 (% class="box infomessage" %)
1213 (((
1214 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1215 )))
1216
1217
1218
1219 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1220
1221 * AT Command:
1222
1223 (% class="box infomessage" %)
1224 (((
1225 **AT+SETCNT=aa,(bb cc dd ee) **
1226 )))
1227
1228 aa: 1: Set count1,
1229
1230 2: Set count2,
1231
1232 3: Set AV1 count
1233
1234 Bb cc dd ee: number to be set
1235
1236
1237 * Downlink Payload (prefix 0xA8):
1238
1239 (% class="box infomessage" %)
1240 (((
1241 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1242 )))
1243
1244
1245
1246 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1247
1248 Clear counting for counting mode
1249
1250 * AT Command:
1251
1252 (% class="box infomessage" %)
1253 (((
1254 **AT+CLRCOUNT ~/~/ clear all counting**
1255 )))
1256
1257 * Downlink Payload (prefix 0xA6):
1258
1259 (% class="box infomessage" %)
1260 (((
1261 **0x A6 01     ~/~/ clear all counting,**
1262 )))
1263
1264
1265
1266 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1267
1268 * AT Command:
1269
1270 (% class="box infomessage" %)
1271 (((
1272 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1273 )))
1274
1275 * Downlink Payload (prefix 0xA7):
1276
1277 (% class="box infomessage" %)
1278 (((
1279 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1280 )))
1281
1282 (((
1283 range: aa bb cc:0 to 16777215,  (unit:second)
1284
1285
1286 )))
1287
1288
1289 == 3.5 Integrate with Mydevice ==
1290
1291 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:
1292
1293 (((
1294 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1295 )))
1296
1297 (((
1298 (% 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:
1299 )))
1300
1301 [[image:1653356737703-362.png||height="232" width="732"]]
1302
1303 [[image:image-20220524094641-11.png||height="390" width="723"]]
1304
1305
1306 [[image:image-20220524094641-12.png||height="402" width="718"]]
1307
1308
1309 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1310
1311 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1312
1313 Search under The things network
1314
1315 [[image:1653356838789-523.png||height="337" width="740"]]
1316
1317
1318
1319 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1320
1321 [[image:image-20220524094909-1.png||height="335" width="729"]]
1322
1323
1324 [[image:image-20220524094909-2.png||height="337" width="729"]]
1325
1326
1327 [[image:image-20220524094909-3.png||height="338" width="727"]]
1328
1329
1330 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1331
1332
1333 [[image:image-20220524094909-5.png||height="341" width="734"]]
1334
1335
1336
1337 == 3.6 Interface Detail ==
1338
1339 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1340
1341 Support NPN Type sensor
1342
1343 [[image:1653356991268-289.png]]
1344
1345
1346
1347 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1348
1349 (((
1350 The DI port of LT-22222-L can support NPN or PNP output sensor.
1351 )))
1352
1353 (((
1354 (((
1355 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
1356 )))
1357 )))
1358
1359 [[image:1653357170703-587.png]]
1360
1361 (((
1362 (((
1363 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1364 )))
1365 )))
1366
1367 (((
1368
1369 )))
1370
1371 (((
1372 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1373 )))
1374
1375 (((
1376 This type of sensor will output a low signal GND when active.
1377 )))
1378
1379 * (((
1380 Connect sensor’s output to DI1-
1381 )))
1382 * (((
1383 Connect sensor’s VCC to DI1+.
1384 )))
1385
1386 (((
1387 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1388 )))
1389
1390 (((
1391 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1392 )))
1393
1394 (((
1395 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.
1396 )))
1397
1398 (((
1399
1400 )))
1401
1402 (((
1403 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1404 )))
1405
1406 (((
1407 This type of sensor will output a high signal (example 24v) when active.
1408 )))
1409
1410 * (((
1411 Connect sensor’s output to DI1+
1412 )))
1413 * (((
1414 Connect sensor’s GND DI1-.
1415 )))
1416
1417 (((
1418 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1419 )))
1420
1421 (((
1422 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1423 )))
1424
1425 (((
1426 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.
1427 )))
1428
1429 (((
1430
1431 )))
1432
1433 (((
1434 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1435 )))
1436
1437 (((
1438 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1439 )))
1440
1441 * (((
1442 Connect sensor’s output to DI1+ with a serial 50K resistor
1443 )))
1444 * (((
1445 Connect sensor’s GND DI1-.
1446 )))
1447
1448 (((
1449 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1450 )))
1451
1452 (((
1453 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1454 )))
1455
1456 (((
1457 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.
1458 )))
1459
1460
1461
1462 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1463
1464 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1465
1466 [[image:1653357531600-905.png]]
1467
1468
1469
1470 === 3.6.4 Analog Input Interface ===
1471
1472 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:
1473
1474
1475 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1476
1477 [[image:1653357592296-182.png]]
1478
1479 Example to connect a 4~~20mA sensor
1480
1481 We take the wind speed sensor as an example for reference only.
1482
1483
1484 **Specifications of the wind speed sensor:**
1485
1486 Red:  12~~24v
1487
1488 Yellow:  4~~20mA
1489
1490 Black:  GND
1491
1492
1493 **Connection diagram:**
1494
1495 [[image:1653357640609-758.png]]
1496
1497 [[image:1653357648330-671.png||height="155" width="733"]]
1498
1499
1500
1501 === 3.6.5 Relay Output ===
1502
1503 (((
1504 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:
1505 )))
1506
1507 [[image:image-20220524100215-9.png]]
1508
1509 [[image:image-20220524100215-10.png||height="382" width="723"]]
1510
1511
1512
1513 == 3.7 LEDs Indicators ==
1514
1515 [[image:image-20220524100748-11.png]]
1516
1517
1518 = 4. Use AT Command =
1519
1520 == 4.1 Access AT Command ==
1521
1522 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.
1523
1524 [[image:1653358238933-385.png]]
1525
1526
1527 (((
1528 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:
1529 )))
1530
1531 [[image:1653358355238-883.png]]
1532
1533
1534 (((
1535 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/]]
1536 )))
1537
1538 (((
1539 AT+<CMD>?        : Help on <CMD>
1540 )))
1541
1542 (((
1543 AT+<CMD>         : Run <CMD>
1544 )))
1545
1546 (((
1547 AT+<CMD>=<value> : Set the value
1548 )))
1549
1550 (((
1551 AT+<CMD>=?       : Get the value
1552 )))
1553
1554 (((
1555 ATZ: Trig a reset of the MCU
1556 )))
1557
1558 (((
1559 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1560 )))
1561
1562 (((
1563 AT+DEUI: Get or Set the Device EUI
1564 )))
1565
1566 (((
1567 AT+DADDR: Get or Set the Device Address
1568 )))
1569
1570 (((
1571 AT+APPKEY: Get or Set the Application Key
1572 )))
1573
1574 (((
1575 AT+NWKSKEY: Get or Set the Network Session Key
1576 )))
1577
1578 (((
1579 AT+APPSKEY: Get or Set the Application Session Key
1580 )))
1581
1582 (((
1583 AT+APPEUI: Get or Set the Application EUI
1584 )))
1585
1586 (((
1587 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1588 )))
1589
1590 (((
1591 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1592 )))
1593
1594 (((
1595 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1596 )))
1597
1598 (((
1599 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1600 )))
1601
1602 (((
1603 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1604 )))
1605
1606 (((
1607 AT+RX2FQ: Get or Set the Rx2 window frequency
1608 )))
1609
1610 (((
1611 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1612 )))
1613
1614 (((
1615 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1616 )))
1617
1618 (((
1619 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1620 )))
1621
1622 (((
1623 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1624 )))
1625
1626 (((
1627 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1628 )))
1629
1630 (((
1631 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1632 )))
1633
1634 (((
1635 AT+NWKID: Get or Set the Network ID
1636 )))
1637
1638 (((
1639 AT+FCU: Get or Set the Frame Counter Uplink
1640 )))
1641
1642 (((
1643 AT+FCD: Get or Set the Frame Counter Downlink
1644 )))
1645
1646 (((
1647 AT+CLASS: Get or Set the Device Class
1648 )))
1649
1650 (((
1651 AT+JOIN: Join network
1652 )))
1653
1654 (((
1655 AT+NJS: Get OTAA Join Status
1656 )))
1657
1658 (((
1659 AT+SENDB: Send hexadecimal data along with the application port
1660 )))
1661
1662 (((
1663 AT+SEND: Send text data along with the application port
1664 )))
1665
1666 (((
1667 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1668 )))
1669
1670 (((
1671 AT+RECV: Print last received data in raw format
1672 )))
1673
1674 (((
1675 AT+VER: Get current image version and Frequency Band
1676 )))
1677
1678 (((
1679 AT+CFM: Get or Set the confirmation mode (0-1)
1680 )))
1681
1682 (((
1683 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1684 )))
1685
1686 (((
1687 AT+SNR: Get the SNR of the last received packet
1688 )))
1689
1690 (((
1691 AT+RSSI: Get the RSSI of the last received packet
1692 )))
1693
1694 (((
1695 AT+TDC: Get or set the application data transmission interval in ms
1696 )))
1697
1698 (((
1699 AT+PORT: Get or set the application port
1700 )))
1701
1702 (((
1703 AT+DISAT: Disable AT commands
1704 )))
1705
1706 (((
1707 AT+PWORD: Set password, max 9 digits
1708 )))
1709
1710 (((
1711 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1712 )))
1713
1714 (((
1715 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1716 )))
1717
1718 (((
1719 AT+CFG: Print all settings
1720
1721
1722 )))
1723
1724
1725
1726 == 4.2 Common AT Command Sequence ==
1727
1728 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1729
1730 (((
1731
1732
1733 **If device has not joined network yet:**
1734 )))
1735
1736 (((
1737 (% style="background-color:#dcdcdc" %)123456
1738 )))
1739
1740 (((
1741 (% style="background-color:#dcdcdc" %)AT+FDR
1742 )))
1743
1744 (((
1745 (% style="background-color:#dcdcdc" %)123456
1746 )))
1747
1748 (((
1749 (% style="background-color:#dcdcdc" %)AT+NJM=0
1750 )))
1751
1752 (((
1753 (% style="background-color:#dcdcdc" %)ATZ
1754 )))
1755
1756
1757 (((
1758 **If device already joined network:**
1759 )))
1760
1761 (((
1762 (% style="background-color:#dcdcdc" %)AT+NJM=0
1763 )))
1764
1765 (((
1766 (% style="background-color:#dcdcdc" %)ATZ
1767
1768
1769 )))
1770
1771
1772
1773 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1774
1775 (((
1776
1777
1778 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1779 )))
1780
1781 (((
1782 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1783 )))
1784
1785 (((
1786 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1787 )))
1788
1789 (((
1790 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1791 )))
1792
1793 (((
1794 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1795 )))
1796
1797 (((
1798 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1799 )))
1800
1801 (((
1802 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1803 )))
1804
1805 (((
1806 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1807 )))
1808
1809 (((
1810 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1811 )))
1812
1813 (((
1814 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1815 )))
1816
1817 (((
1818 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1819 )))
1820
1821 (((
1822 (% 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.
1823 )))
1824
1825 (((
1826 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1827
1828
1829 )))
1830
1831 (((
1832 (% style="color:red" %)**Note:**
1833 )))
1834
1835 (((
1836 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1837 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1838 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.
1839 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
1840 )))
1841
1842 (((
1843 [[image:1653359097980-169.png||height="188" width="729"]]
1844 )))
1845
1846 (((
1847
1848 )))
1849
1850
1851 === 4.2.3 Change to Class A ===
1852
1853 If sensor JOINED
1854 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1855 ATZ
1856
1857
1858 = 5. FAQ =
1859
1860 == 5.1 How to upgrade the image? ==
1861
1862
1863 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1864
1865 * Support new features
1866 * For bug fix
1867 * Change LoRaWAN bands.
1868
1869 Below shows the hardware connection for how to upload an image to the LT:
1870
1871 [[image:1653359603330-121.png]]
1872
1873
1874 (((
1875 (% 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]].
1876 (% 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/]].
1877 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1878
1879
1880 (% style="color:blue" %)**For LT-22222-L**(%%):
1881 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.
1882 )))
1883
1884 [[image:image-20220524103407-12.png]]
1885
1886 [[image:image-20220524103429-13.png]]
1887
1888 [[image:image-20220524104033-15.png]]
1889
1890
1891 (% 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:
1892
1893 [[image:1653360054704-518.png||height="186" width="745"]]
1894
1895
1896 (((
1897 (((
1898
1899
1900 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1901 )))
1902 )))
1903
1904 (((
1905 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1906 )))
1907
1908 (((
1909
1910
1911 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1912 )))
1913
1914 (((
1915 (((
1916 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1917 )))
1918 )))
1919
1920 (((
1921 (((
1922 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1923
1924
1925 )))
1926 )))
1927
1928 (((
1929 (% 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.
1930 )))
1931
1932 (((
1933 [[image:1653360231087-571.png||height="401" width="727"]]
1934 )))
1935
1936 (((
1937 (% 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.
1938 )))
1939
1940
1941 (((
1942 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1943 )))
1944
1945 (((
1946 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1947 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1948 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1949 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1950 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1951 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1952 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1953 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1954 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1955 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1956 )))
1957
1958
1959 (((
1960 As shown in below:
1961 )))
1962
1963 [[image:1653360498588-932.png||height="485" width="726"]]
1964
1965
1966 == 5.4 Can I see counting event in Serial? ==
1967
1968 (((
1969 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.
1970
1971
1972 == 5.5 Can i use point to point communication for LT-22222-L? ==
1973
1974 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1975 )))
1976
1977 (((
1978
1979
1980 = 6. Trouble Shooting =
1981 )))
1982
1983 (((
1984 (((
1985 == 6.1 Downlink doesn’t work, how to solve it? ==
1986 )))
1987 )))
1988
1989 (((
1990 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1991 )))
1992
1993 (((
1994
1995
1996 == 6.2 Have trouble to upload image. ==
1997 )))
1998
1999 (((
2000 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2001 )))
2002
2003 (((
2004
2005
2006 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2007 )))
2008
2009 (((
2010 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2011 )))
2012
2013
2014
2015 = 7. Order Info =
2016
2017
2018 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2019
2020
2021 (% style="color:#4f81bd" %)**XXX:**
2022
2023 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2024 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2025 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2026 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2027 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2028 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2029 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2030 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2031 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2032
2033 = 8. Packing Info =
2034
2035
2036 **Package Includes**:
2037
2038 * LT-22222-L I/O Controller x 1
2039 * Stick Antenna for LoRa RF part x 1
2040 * Bracket for controller x1
2041 * Program cable x 1
2042
2043 **Dimension and weight**:
2044
2045 * Device Size: 13.5 x 7 x 3 cm
2046 * Device Weight: 105g
2047 * Package Size / pcs : 14.5 x 8 x 5 cm
2048 * Weight / pcs : 170g
2049
2050 = 9. Support =
2051
2052 * (((
2053 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.
2054 )))
2055 * (((
2056 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]]
2057 )))
2058
2059 = 10. Reference​​​​​ =
2060
2061 * 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]]
2062 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2063 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2064 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]