Version 82.40 by Xiaoling on 2022/06/25 15:14
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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
23
24 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.
25 )))
26
27 (((
28 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.
29 )))
30
31 (((
32 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
33 )))
34
35 (((
36 The use environment includes:
37 )))
38
39 (((
40 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.
41 )))
42
43 (((
44 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
45 )))
46
47 (((
48 [[image:1653295757274-912.png]]
49
50
51 )))
52
53
54 == 1.2  Specifications ==
55
56 (((
57
58
59 **Hardware System:**
60 )))
61
62 * (((
63 STM32L072CZT6 MCU
64 )))
65 * (((
66 SX1276/78 Wireless Chip 
67 )))
68 * (((
69 (((
70 Power Consumption:
71 )))
72
73 * (((
74 Idle: 4mA@12v
75 )))
76 * (((
77 20dB Transmit: 34mA@12v
78 )))
79 )))
80
81 (((
82
83
84 **Interface for Model: LT22222-L:**
85 )))
86
87 * (((
88 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
89 )))
90 * (((
91 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
92 )))
93 * (((
94 2 x Relay Output (5A@250VAC / 30VDC)
95 )))
96 * (((
97 2 x 0~~20mA Analog Input (res:0.01mA)
98 )))
99 * (((
100 2 x 0~~30V Analog Input (res:0.01v)
101 )))
102 * (((
103 Power Input 7~~ 24V DC. 
104 )))
105
106 (((
107
108
109 **LoRa Spec:**
110 )))
111
112 * (((
113 (((
114 Frequency Range:
115 )))
116
117 * (((
118 Band 1 (HF): 862 ~~ 1020 Mhz
119 )))
120 * (((
121 Band 2 (LF): 410 ~~ 528 Mhz
122 )))
123 )))
124 * (((
125 168 dB maximum link budget.
126 )))
127 * (((
128 +20 dBm - 100 mW constant RF output vs.
129 )))
130 * (((
131 +14 dBm high efficiency PA.
132 )))
133 * (((
134 Programmable bit rate up to 300 kbps.
135 )))
136 * (((
137 High sensitivity: down to -148 dBm.
138 )))
139 * (((
140 Bullet-proof front end: IIP3 = -12.5 dBm.
141 )))
142 * (((
143 Excellent blocking immunity.
144 )))
145 * (((
146 Low RX current of 10.3 mA, 200 nA register retention.
147 )))
148 * (((
149 Fully integrated synthesizer with a resolution of 61 Hz.
150 )))
151 * (((
152 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
153 )))
154 * (((
155 Built-in bit synchronizer for clock recovery.
156 )))
157 * (((
158 Preamble detection.
159 )))
160 * (((
161 127 dB Dynamic Range RSSI.
162 )))
163 * (((
164 Automatic RF Sense and CAD with ultra-fast AFC.
165 )))
166 * (((
167 Packet engine up to 256 bytes with CRC.
168
169
170
171
172 )))
173
174 == 1.3 Features ==
175
176 * LoRaWAN Class A & Class C protocol
177 * Optional Customized LoRa Protocol
178 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
179 * AT Commands to change parameters
180 * Remote configure parameters via LoRa Downlink
181 * Firmware upgradable via program port
182 * Counting
183
184
185
186
187
188 == 1.4  Applications ==
189
190 * Smart Buildings & Home Automation
191 * Logistics and Supply Chain Management
192 * Smart Metering
193 * Smart Agriculture
194 * Smart Cities
195 * Smart Factory
196
197
198
199
200
201 == 1.5 Hardware Variants ==
202
203 (% border="1" style="background-color:#f7faff; width:500px" %)
204 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
205 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
206 * 2 x Digital Input (Bi-direction)
207 * 2 x Digital Output
208 * 2 x Relay Output (5A@250VAC / 30VDC)
209 * 2 x 0~~20mA Analog Input (res:0.01mA)
210 * 2 x 0~~30V Analog Input (res:0.01v)
211 * 1 x Counting Port
212 )))
213
214
215
216 = 2. Power ON Device =
217
218 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.
219
220 (((
221 PWR will on when device is properly powered.
222 )))
223
224 [[image:1653297104069-180.png]]
225
226
227
228 = 3. Operation Mode =
229
230 == 3.1 How it works? ==
231
232 (((
233 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. 
234 )))
235
236 (((
237 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.
238 )))
239
240
241 == 3.2 Example to join LoRaWAN network ==
242
243 (((
244 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. 
245 )))
246
247 [[image:image-20220523172350-1.png||height="266" width="864"]]
248
249
250 (((
251 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:
252 )))
253
254 (((
255 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
256 )))
257
258 (((
259 Each LT is shipped with a sticker with the default device EUI as below:
260 )))
261
262 [[image:1653297924498-393.png]]
263
264
265 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
266
267 Add APP EUI in the application.
268
269 [[image:1653297955910-247.png||height="321" width="716"]]
270
271
272 Add APP KEY and DEV EUI
273
274 [[image:1653298023685-319.png]]
275
276
277 (((
278 (% style="color:blue" %)**Step 2**(%%): Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.
279 )))
280
281 [[image:1653298044601-602.png||height="405" width="709"]]
282
283
284
285 == 3.3 Uplink Payload ==
286
287 There are five working modes + one interrupt mode on LT for different type application:
288
289 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
290 * **MOD2**: Double DI Counting + DO + RO
291 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
292 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
293 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
294 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
295
296
297
298
299
300
301 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
302
303 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
304
305 [[image:image-20220523174024-3.png]]
306
307 (((
308
309
310 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
311 )))
312
313 [[image:image-20220523174254-4.png]]
314
315 * RO is for relay. ROx=1 : close，ROx=0 always open.
316 * DI is for digital input. DIx=1: high or float, DIx=0: low.
317 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
318
319 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
320
321 For example if payload is: [[image:image-20220523175847-2.png]]
322
323
324 **The value for the interface is:  **
325
326 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
327
328 AVI2 channel voltage is 0x04AC/1000=1.196V
329
330 ACI1 channel current is 0x1310/1000=4.880mA
331
332 ACI2 channel current is 0x1300/1000=4.864mA
333
334 The last byte 0xAA= 10101010(B) means
335
336 * [1] RO1 relay channel is close and the RO1 LED is ON.
337 * [0] RO2 relay channel is open and RO2 LED is OFF;
338
339
340 **LT22222-L:**
341
342 * [1] DI2 channel is high input and DI2 LED is ON;
343 * [0] DI1 channel is low input;
344
345 * [0] DO3 channel output state
346 ** DO3 is float in case no load between DO3 and V+.;
347 ** DO3 is high in case there is load between DO3 and V+.
348 ** DO3 LED is off in both case
349 * [1] DO2 channel output is low and DO2 LED is ON.
350 * [0] DO1 channel output state
351 ** DO1 is float in case no load between DO1 and V+.;
352 ** DO1 is high in case there is load between DO1 and V+.
353 ** DO1 LED is off in both case
354
355
356
357
358
359
360 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
361
362
363 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
364
365 (((
366 Total : 11 bytes payload
367 )))
368
369 [[image:image-20220523180452-3.png]]
370
371
372 (((
373 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
374 )))
375
376 [[image:image-20220523180506-4.png]]
377
378 * RO is for relay. ROx=1 : close，ROx=0 always open.
379 * FIRST: Indicate this is the first packet after join network.
380 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
381
382 (((
383 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
384 )))
385
386 (((
387
388
389 **To use counting mode, please run:**
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+MOD=2**
396
397 **ATZ**
398 )))
399 )))
400
401 (((
402
403
404 (% style="color:#4f81bd" %)**AT Commands for counting:**
405 )))
406
407 (((
408 **For LT22222-L:**
409
410
411 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
412
413 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
414
415 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
416
417 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
418
419 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
420
421 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
422 )))
423
424
425
426 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
427
428 **LT22222-L**: This mode the DI1 is used as a counting pin.
429
430 [[image:image-20220523181246-5.png]]
431
432 (((
433 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
434 )))
435
436 [[image:image-20220523181301-6.png]]
437
438 * RO is for relay. ROx=1 : close，ROx=0 always open.
439 * FIRST: Indicate this is the first packet after join network.
440 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
441
442 (((
443 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
444 )))
445
446 (((
447 **To use counting mode, please run:**
448 )))
449
450 (% class="box infomessage" %)
451 (((
452 (((
453 **AT+MOD=3**
454
455 **ATZ**
456 )))
457 )))
458
459 (((
460 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
461 )))
462
463
464
465 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
466
467
468 **LT22222-L**: This mode the DI1 is used as a counting pin.
469
470 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.
471
472 [[image:image-20220523181903-8.png]]
473
474
475 (((
476 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
477 )))
478
479 [[image:image-20220523181727-7.png]]
480
481 * RO is for relay. ROx=1 : close，ROx=0 always open.
482 * FIRST: Indicate this is the first packet after join network.
483 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
484
485 (((
486 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
487 )))
488
489 (((
490
491
492 **To use this mode, please run:**
493 )))
494
495 (% class="box infomessage" %)
496 (((
497 (((
498 **AT+MOD=4**
499
500 **ATZ**
501 )))
502 )))
503
504
505
506 (((
507 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
508 )))
509
510 (((
511
512
513 **Plus below command for AVI1 Counting:**
514
515
516 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
517
518 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
519
520 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
521
522 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
523 )))
524
525
526
527 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
528
529
530 **LT22222-L**: This mode the DI1 is used as a counting pin.
531
532 [[image:image-20220523182334-9.png]]
533
534 (((
535
536
537 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
538 )))
539
540 * RO is for relay. ROx=1 : close，ROx=0 always open.
541 * FIRST: Indicate this is the first packet after join network.
542 * (((
543 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
544 )))
545
546 (((
547 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
548 )))
549
550 (((
551
552
553 **To use this mode, please run:**
554 )))
555
556 (% class="box infomessage" %)
557 (((
558 (((
559 **AT+MOD=5**
560
561 **ATZ**
562 )))
563 )))
564
565 (((
566 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
567 )))
568
569
570
571 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
572
573
574 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
575
576 For example, if user has configured below commands:
577
578 * **AT+MOD=1 ** **~-~->** The normal working mode
579 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
580
581 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
582
583 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
584 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.**
585
586 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
587
588 (% style="color:#4f81bd" %)**Trigger base on voltage**:
589
590 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
591
592 **Example:**
593
594 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)
595
596 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
597
598
599
600 (% style="color:#4f81bd" %)**Trigger base on current**:
601
602 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
603
604 **Example:**
605
606 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
607
608
609
610 (% style="color:#4f81bd" %)**Trigger base on DI status**:
611
612 DI status trigger Flag.
613
614 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
615
616
617 **Example:**
618
619 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
620
621
622 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
623
624 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
625
626 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
627
628 AA: Code for this downlink Command:
629
630 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
631
632 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
633
634 yy2 yy2: AC1 or AV1 high limit.
635
636 yy3 yy3: AC2 or AV2 low limit.
637
638 Yy4 yy4: AC2 or AV2 high limit.
639
640
641 **Example1**: AA 00 13 88 00 00 00 00 00 00
642
643 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
644
645
646 **Example2**: AA 02 01 00
647
648 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
649
650
651
652 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
653
654 MOD6 Payload : total 11 bytes payload
655
656 [[image:image-20220524085923-1.png]]
657
658
659 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
660
661 [[image:image-20220524090106-2.png]]
662
663 * Each bits shows if the corresponding trigger has been configured.
664
665 **Example:**
666
667 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
668
669
670 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
671
672 [[image:image-20220524090249-3.png]]
673
674 * Each bits shows which status has been trigger on this uplink.
675
676 **Example:**
677
678 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
679
680
681 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
682
683 [[image:image-20220524090456-4.png]]
684
685 * Each bits shows which status has been trigger on this uplink.
686
687 **Example:**
688
689 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
690
691 00000101: Means both DI1 and DI2 trigger are enabled.
692
693
694 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
695
696 Downlink command to poll MOD6 status:
697
698 **AB 06**
699
700 When device got this command, it will send the MOD6 payload.
701
702
703
704 === 3.3.7 Payload Decoder ===
705
706 (((
707
708
709 **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/]]
710
711
712 )))
713
714
715 == 3.4 ​Configure LT via AT or Downlink ==
716
717 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
718
719 (((
720 There are two kinds of Commands:
721 )))
722
723 * (% 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]]
724
725 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
726
727 === 3.4.1 Common Commands ===
728
729 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]]
730
731
732
733 === 3.4.2 Sensor related commands ===
734
735 ==== 3.4.2.1 Set Transmit Interval ====
736
737 Set device uplink interval.
738
739 * (% style="color:#037691" %)**AT Command:**
740
741 **AT+TDC=N **
742
743
744 **Example: **AT+TDC=30000. Means set interval to 30 seconds
745
746
747 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
748
749 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
750
751
752
753
754 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
755
756 Set work mode.
757
758 * (% style="color:#037691" %)**AT Command:**
759
760 **AT+MOD=N  **
761
762
763 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
764
765
766 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
767
768 **0x0A aa    ** ~/~/ Same as AT+MOD=aa
769
770
771
772
773 ==== 3.4.2.3 Poll an uplink ====
774
775 * (% style="color:#037691" %)**AT Command:**
776
777 There is no AT Command to poll uplink
778
779
780 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
781
782 **0x08 FF     **~/~/ Poll an uplink
783
784 **Example**: 0x08FF, ask device to send an Uplink
785
786
787
788 ==== 3.4.2.4 Enable Trigger Mode ====
789
790 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
791
792 * (% style="color:#037691" %)**AT Command:**
793
794 **AT+ADDMOD6=1 or 0**
795
796 1: Enable Trigger Mode
797
798 0: Disable Trigger Mode
799
800
801 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
802
803 **0x0A 06 aa    ** ~/~/ Same as AT+ADDMOD6=aa
804
805
806
807
808 ==== 3.4.2.5 Poll trigger settings ====
809
810 Poll trigger settings,
811
812 * (% style="color:#037691" %)**AT Command:**
813
814 There is no AT Command for this feature.
815
816
817 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
818
819 **0xAB 06         **~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
820
821
822
823
824 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
825
826 Enable Disable DI1/DI2/DI2 as trigger,
827
828 * (% style="color:#037691" %)**AT Command:**
829
830 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
831
832
833 **Example:**
834
835 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
836
837 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
838
839 **0xAA 02 aa bb        **~/~/ Same as AT+DTRI=aa,bb
840
841
842
843
844 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
845
846 Set DI1 or DI3(for LT-33222-L) trigger.
847
848 * (% style="color:#037691" %)**AT Command:**
849
850 **AT+TRIG1=a,b**
851
852 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
853
854 b : delay timing.
855
856
857 **Example:**
858
859 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
860
861
862 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
863 * **0x09 01 aa bb cc    ** ~/~/ same as AT+TRIG1=aa,0x(bb cc)
864
865
866
867 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
868
869 Set DI2 trigger.
870
871 * (% style="color:#037691" %)**AT Command:**
872
873 **AT+TRIG2=a,b**
874
875
876 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
877
878 b : delay timing.
879
880
881 **Example:**
882
883 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
884
885
886 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
887
888 **0x09 02 aa bb cc           **~/~/ same as AT+TRIG1=aa,0x(bb cc)
889
890
891
892
893 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
894
895 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
896
897 * (% style="color:#037691" %)**AT Command**
898
899 **AT+ACLIM**
900
901
902 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
903
904 **0x AA 01 aa bb cc dd ee ff gg hh        ** ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
905
906
907
908
909 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
910
911 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
912
913 * (% style="color:#037691" %)**AT Command**
914
915 **AT+AVLIM  See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
916
917
918 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
919
920 **0x AA 00 aa bb cc dd ee ff gg hh    ** ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
921
922
923
924
925 ==== 3.4.2.11 Trigger – Set minimum interval ====
926
927 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
928
929 * (% style="color:#037691" %)**AT Command**
930
931 **AT+ATDC=5        ** Device won't response the second trigger within 5 minute after the first trigger.
932
933
934 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
935
936 **0x AC aa bb   ** ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
937
938
939
940
941 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
942
943 * (% style="color:#037691" %)**AT Command**
944
945 There is no AT Command to control Digital Output
946
947
948 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
949 * **0x02 aa bb cc     **~/~/ Set DO1/DO2/DO3 output
950
951 (((
952 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
953 )))
954
955 (((
956 01: Low,  00: High ,  11: No action
957 )))
958
959 [[image:image-20220524092754-5.png]]
960
961 (((
962 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
963 )))
964
965 (((
966 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
967 )))
968
969
970
971
972 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
973
974 * (% style="color:#037691" %)**AT Command**
975
976 There is no AT Command to control Digital Output
977
978
979 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
980
981 **0xA9 aa bb cc     **~/~/ Set DO1/DO2/DO3 output with time control
982
983
984 This is to control the digital output time of DO pin. Include four bytes:
985
986 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
987
988 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
989
990 01: DO pins will change back to original state after timeout.
991
992 00: DO pins will change to an inverter state after timeout 
993
994
995 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
996
997 [[image:image-20220524093238-6.png]]
998
999
1000 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1001
1002 [[image:image-20220524093328-7.png]]
1003
1004
1005 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1006
1007 [[image:image-20220524093351-8.png]]
1008
1009
1010 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1011
1012 Latching time. Unit: ms
1013
1014 Device will upload a packet if downlink code executes successfully.
1015
1016
1017 **Example payload:**
1018
1019 **~1. A9 01 01 01 01 07 D0**
1020
1021 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1022
1023 **2. A9 01 00 01 11 07 D0**
1024
1025 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1026
1027 **3. A9 00 00 00 00 07 D0**
1028
1029 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1030
1031 **4. A9 00 11 01 00 07 D0**
1032
1033 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
1034
1035
1036
1037
1038 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1039
1040 * (% style="color:#037691" %)**AT Command:**
1041
1042 There is no AT Command to control Relay Output
1043
1044
1045 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1046
1047 **0x03 aa bb     **~/~/ Set RO1/RO2 output
1048
1049
1050 (((
1051 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1052 )))
1053
1054 (((
1055 01: Close ,  00: Open , 11: No action
1056 )))
1057
1058 (((
1059 [[image:image-20220524093724-9.png]]
1060 )))
1061
1062 Device will upload a packet if downlink code executes successfully.
1063
1064
1065
1066
1067 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1068
1069 * (% style="color:#037691" %)**AT Command:**
1070
1071 There is no AT Command to control Relay Output
1072
1073
1074 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1075
1076 **0x05 aa bb cc dd     **~/~/ Set RO1/RO2 relay with time control
1077
1078
1079 This is to control the relay output time of relay. Include four bytes:
1080
1081 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1082
1083 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1084
1085 01: Relays will change back to original state after timeout.
1086
1087 00: Relays will change to an inverter state after timeout
1088
1089
1090 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1091
1092 [[image:image-20220524093831-10.png]]
1093
1094
1095 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1096
1097 Device will upload a packet if downlink code executes successfully.
1098
1099
1100 **Example payload:**
1101
1102 **~1. 05 01 11 07 D0**
1103
1104 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1105
1106 **2. 05 01 10 07 D0**
1107
1108 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1109
1110 **3. 05 00 01 07 D0**
1111
1112 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1113
1114 **4. 05 00 00 07 D0**
1115
1116 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1117
1118
1119
1120
1121 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1122
1123 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1124
1125 * (% style="color:#037691" %)**AT Command:**
1126
1127 **AT+VOLMAX   ** ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1128
1129
1130 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1131
1132 **0xA5 aa bb cc   **~/~/ Same as AT+VOLMAX=(aa bb),cc
1133
1134
1135
1136
1137 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1138
1139 * (% style="color:#037691" %)**AT Command:**
1140
1141 **AT+SETCNT=aa,(bb cc dd ee) **
1142
1143 aa: 1: Set count1,
1144
1145 2: Set count2,
1146
1147 3: Set AV1 count
1148
1149 Bb cc dd ee: number to be set
1150
1151
1152 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1153
1154 **0x A8 aa bb cc dd ee     **~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1155
1156
1157
1158
1159 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1160
1161 Clear counting for counting mode
1162
1163 * (% style="color:#037691" %)**AT Command:**
1164
1165 **AT+CLRCOUNT ** ~/~/ clear all counting
1166
1167
1168 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1169
1170 **0x A6 01    ** ~/~/ clear all counting
1171
1172
1173
1174
1175 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1176
1177 * (% style="color:#037691" %)**AT Command:**
1178
1179 **AT+COUTIME=60  **~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1180
1181
1182 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1183
1184 **0x A7 aa bb cc     **~/~/ same as AT+COUTIME =aa bb cc,
1185
1186 (((
1187 range: aa bb cc:0 to 16777215,  (unit:second)
1188
1189
1190 )))
1191
1192
1193
1194 == 3.5 Integrate with Mydevice ==
1195
1196 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:
1197
1198 (((
1199 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1200 )))
1201
1202 (((
1203 (% 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:
1204 )))
1205
1206 [[image:1653356737703-362.png||height="232" width="732"]]
1207
1208 [[image:image-20220524094641-11.png||height="390" width="723"]]
1209
1210
1211 [[image:image-20220524094641-12.png||height="402" width="718"]]
1212
1213
1214 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1215
1216 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1217
1218 Search under The things network
1219
1220 [[image:1653356838789-523.png||height="337" width="740"]]
1221
1222
1223
1224 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1225
1226 [[image:image-20220524094909-1.png||height="335" width="729"]]
1227
1228
1229 [[image:image-20220524094909-2.png||height="337" width="729"]]
1230
1231
1232 [[image:image-20220524094909-3.png||height="338" width="727"]]
1233
1234
1235 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1236
1237
1238 [[image:image-20220524094909-5.png||height="341" width="734"]]
1239
1240
1241
1242 == 3.6 Interface Detail ==
1243
1244 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1245
1246 Support NPN Type sensor
1247
1248 [[image:1653356991268-289.png]]
1249
1250
1251
1252 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1253
1254 (((
1255 The DI port of LT-22222-L can support NPN or PNP output sensor.
1256 )))
1257
1258 (((
1259 (((
1260 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
1261 )))
1262 )))
1263
1264 [[image:1653357170703-587.png]]
1265
1266 (((
1267 (((
1268 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1269 )))
1270 )))
1271
1272 (((
1273
1274 )))
1275
1276 (((
1277 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1278 )))
1279
1280 (((
1281 This type of sensor will output a low signal GND when active.
1282 )))
1283
1284 * (((
1285 Connect sensor’s output to DI1-
1286 )))
1287 * (((
1288 Connect sensor’s VCC to DI1+.
1289 )))
1290
1291 (((
1292 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1293 )))
1294
1295 (((
1296 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1297 )))
1298
1299 (((
1300 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.
1301 )))
1302
1303 (((
1304
1305 )))
1306
1307 (((
1308 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1309 )))
1310
1311 (((
1312 This type of sensor will output a high signal (example 24v) when active.
1313 )))
1314
1315 * (((
1316 Connect sensor’s output to DI1+
1317 )))
1318 * (((
1319 Connect sensor’s GND DI1-.
1320 )))
1321
1322 (((
1323 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1324 )))
1325
1326 (((
1327 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1328 )))
1329
1330 (((
1331 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.
1332 )))
1333
1334 (((
1335
1336 )))
1337
1338 (((
1339 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1340 )))
1341
1342 (((
1343 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1344 )))
1345
1346 * (((
1347 Connect sensor’s output to DI1+ with a serial 50K resistor
1348 )))
1349 * (((
1350 Connect sensor’s GND DI1-.
1351 )))
1352
1353 (((
1354 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1355 )))
1356
1357 (((
1358 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1359 )))
1360
1361 (((
1362 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.
1363 )))
1364
1365
1366
1367 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1368
1369 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1370
1371 [[image:1653357531600-905.png]]
1372
1373
1374
1375 === 3.6.4 Analog Input Interface ===
1376
1377 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:
1378
1379
1380 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1381
1382 [[image:1653357592296-182.png]]
1383
1384 Example to connect a 4~~20mA sensor
1385
1386 We take the wind speed sensor as an example for reference only.
1387
1388
1389 **Specifications of the wind speed sensor:**
1390
1391 Red:  12~~24v
1392
1393 Yellow:  4~~20mA
1394
1395 Black:  GND
1396
1397
1398 **Connection diagram:**
1399
1400 [[image:1653357640609-758.png]]
1401
1402 [[image:1653357648330-671.png||height="155" width="733"]]
1403
1404
1405
1406 === 3.6.5 Relay Output ===
1407
1408 (((
1409 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:
1410 )))
1411
1412 [[image:image-20220524100215-9.png]]
1413
1414 [[image:image-20220524100215-10.png||height="382" width="723"]]
1415
1416
1417
1418 == 3.7 LEDs Indicators ==
1419
1420 [[image:image-20220524100748-11.png]]
1421
1422
1423
1424 = 4. Use AT Command =
1425
1426 == 4.1 Access AT Command ==
1427
1428 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.
1429
1430 [[image:1653358238933-385.png]]
1431
1432
1433 (((
1434 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:
1435 )))
1436
1437 [[image:1653358355238-883.png]]
1438
1439
1440 (((
1441 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/]]
1442 )))
1443
1444 (((
1445 AT+<CMD>?        : Help on <CMD>
1446 )))
1447
1448 (((
1449 AT+<CMD>         : Run <CMD>
1450 )))
1451
1452 (((
1453 AT+<CMD>=<value> : Set the value
1454 )))
1455
1456 (((
1457 AT+<CMD>=?       : Get the value
1458 )))
1459
1460 (((
1461 ATZ: Trig a reset of the MCU
1462 )))
1463
1464 (((
1465 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1466 )))
1467
1468 (((
1469 AT+DEUI: Get or Set the Device EUI
1470 )))
1471
1472 (((
1473 AT+DADDR: Get or Set the Device Address
1474 )))
1475
1476 (((
1477 AT+APPKEY: Get or Set the Application Key
1478 )))
1479
1480 (((
1481 AT+NWKSKEY: Get or Set the Network Session Key
1482 )))
1483
1484 (((
1485 AT+APPSKEY: Get or Set the Application Session Key
1486 )))
1487
1488 (((
1489 AT+APPEUI: Get or Set the Application EUI
1490 )))
1491
1492 (((
1493 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1494 )))
1495
1496 (((
1497 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1498 )))
1499
1500 (((
1501 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1502 )))
1503
1504 (((
1505 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1506 )))
1507
1508 (((
1509 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1510 )))
1511
1512 (((
1513 AT+RX2FQ: Get or Set the Rx2 window frequency
1514 )))
1515
1516 (((
1517 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1518 )))
1519
1520 (((
1521 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1522 )))
1523
1524 (((
1525 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1526 )))
1527
1528 (((
1529 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1530 )))
1531
1532 (((
1533 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1534 )))
1535
1536 (((
1537 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1538 )))
1539
1540 (((
1541 AT+NWKID: Get or Set the Network ID
1542 )))
1543
1544 (((
1545 AT+FCU: Get or Set the Frame Counter Uplink
1546 )))
1547
1548 (((
1549 AT+FCD: Get or Set the Frame Counter Downlink
1550 )))
1551
1552 (((
1553 AT+CLASS: Get or Set the Device Class
1554 )))
1555
1556 (((
1557 AT+JOIN: Join network
1558 )))
1559
1560 (((
1561 AT+NJS: Get OTAA Join Status
1562 )))
1563
1564 (((
1565 AT+SENDB: Send hexadecimal data along with the application port
1566 )))
1567
1568 (((
1569 AT+SEND: Send text data along with the application port
1570 )))
1571
1572 (((
1573 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1574 )))
1575
1576 (((
1577 AT+RECV: Print last received data in raw format
1578 )))
1579
1580 (((
1581 AT+VER: Get current image version and Frequency Band
1582 )))
1583
1584 (((
1585 AT+CFM: Get or Set the confirmation mode (0-1)
1586 )))
1587
1588 (((
1589 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1590 )))
1591
1592 (((
1593 AT+SNR: Get the SNR of the last received packet
1594 )))
1595
1596 (((
1597 AT+RSSI: Get the RSSI of the last received packet
1598 )))
1599
1600 (((
1601 AT+TDC: Get or set the application data transmission interval in ms
1602 )))
1603
1604 (((
1605 AT+PORT: Get or set the application port
1606 )))
1607
1608 (((
1609 AT+DISAT: Disable AT commands
1610 )))
1611
1612 (((
1613 AT+PWORD: Set password, max 9 digits
1614 )))
1615
1616 (((
1617 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1618 )))
1619
1620 (((
1621 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1622 )))
1623
1624 (((
1625 AT+CFG: Print all settings
1626 )))
1627
1628
1629
1630 == 4.2 Common AT Command Sequence ==
1631
1632 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1633
1634 (((
1635
1636
1637 **If device has not joined network yet:**
1638 )))
1639
1640 (((
1641 (% style="background-color:#dcdcdc" %)123456
1642 )))
1643
1644 (((
1645 (% style="background-color:#dcdcdc" %)AT+FDR
1646 )))
1647
1648 (((
1649 (% style="background-color:#dcdcdc" %)123456
1650 )))
1651
1652 (((
1653 (% style="background-color:#dcdcdc" %)AT+NJM=0
1654 )))
1655
1656 (((
1657 (% style="background-color:#dcdcdc" %)ATZ
1658 )))
1659
1660
1661 (((
1662 **If device already joined network:**
1663 )))
1664
1665 (((
1666 (% style="background-color:#dcdcdc" %)AT+NJM=0
1667 )))
1668
1669 (((
1670 (% style="background-color:#dcdcdc" %)ATZ
1671 )))
1672
1673
1674
1675 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1676
1677 (((
1678
1679
1680 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1681 )))
1682
1683 (((
1684 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1685 )))
1686
1687 (((
1688 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1689 )))
1690
1691 (((
1692 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1693 )))
1694
1695 (((
1696 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1697 )))
1698
1699 (((
1700 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1701 )))
1702
1703 (((
1704 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1705 )))
1706
1707 (((
1708 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1709 )))
1710
1711 (((
1712 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1713 )))
1714
1715 (((
1716 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1717 )))
1718
1719 (((
1720 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1721 )))
1722
1723 (((
1724 (% 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.
1725 )))
1726
1727 (((
1728 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1729
1730
1731 )))
1732
1733 (((
1734 (% style="color:red" %)**Note:**
1735 )))
1736
1737 (((
1738 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1739 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1740 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.
1741 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
1742 )))
1743
1744 (((
1745 [[image:1653359097980-169.png||height="188" width="729"]]
1746 )))
1747
1748 (((
1749
1750 )))
1751
1752
1753 === 4.2.3 Change to Class A ===
1754
1755 If sensor JOINED
1756 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1757 ATZ
1758
1759
1760 = 5. FAQ =
1761
1762 == 5.1 How to upgrade the image? ==
1763
1764
1765 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1766
1767 * Support new features
1768 * For bug fix
1769 * Change LoRaWAN bands.
1770
1771 Below shows the hardware connection for how to upload an image to the LT:
1772
1773 [[image:1653359603330-121.png]]
1774
1775
1776 (((
1777 (% 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]].
1778 (% 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/]].
1779 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1780
1781
1782 (% style="color:blue" %)**For LT-22222-L**(%%):
1783 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.
1784 )))
1785
1786 [[image:image-20220524103407-12.png]]
1787
1788 [[image:image-20220524103429-13.png]]
1789
1790 [[image:image-20220524104033-15.png]]
1791
1792
1793 (% 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:
1794
1795 [[image:1653360054704-518.png||height="186" width="745"]]
1796
1797
1798 (((
1799 (((
1800
1801
1802 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1803 )))
1804 )))
1805
1806 (((
1807 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1808 )))
1809
1810 (((
1811
1812
1813 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1814 )))
1815
1816 (((
1817 (((
1818 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1819 )))
1820 )))
1821
1822 (((
1823 (((
1824 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1825
1826
1827 )))
1828 )))
1829
1830 (((
1831 (% 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.
1832 )))
1833
1834 (((
1835 [[image:1653360231087-571.png||height="401" width="727"]]
1836 )))
1837
1838 (((
1839 (% 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.
1840 )))
1841
1842
1843 (((
1844 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1845 )))
1846
1847 (((
1848 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1849 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1850 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1851 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1852 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1853 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1854 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1855 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1856 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1857 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1858 )))
1859
1860
1861 (((
1862 As shown in below:
1863 )))
1864
1865 [[image:1653360498588-932.png||height="485" width="726"]]
1866
1867
1868 == 5.4 Can I see counting event in Serial? ==
1869
1870 (((
1871 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.
1872
1873
1874 == 5.5 Can i use point to point communication for LT-22222-L? ==
1875
1876 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1877
1878
1879 )))
1880
1881 (((
1882 == 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
1883
1884 If the device is not shut down, but directly powered off.
1885
1886 It will default that this is a power-off state.
1887
1888 In modes 2 to 5, DO RO status and pulse count are saved in flash.
1889
1890 After restart, the status before power failure will be read from flash.
1891
1892
1893 = 6. Trouble Shooting =
1894 )))
1895
1896 (((
1897 (((
1898 == 6.1 Downlink doesn’t work, how to solve it? ==
1899 )))
1900 )))
1901
1902 (((
1903 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1904 )))
1905
1906 (((
1907
1908
1909 == 6.2 Have trouble to upload image. ==
1910 )))
1911
1912 (((
1913 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1914 )))
1915
1916 (((
1917
1918
1919 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1920 )))
1921
1922 (((
1923 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1924 )))
1925
1926
1927
1928 = 7. Order Info =
1929
1930
1931 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1932
1933
1934 (% style="color:#4f81bd" %)**XXX:**
1935
1936 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1937 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1938 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1939 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1940 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1941 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1942 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1943 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1944 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1945
1946
1947
1948 = 8. Packing Info =
1949
1950
1951 **Package Includes**:
1952
1953 * LT-22222-L I/O Controller x 1
1954 * Stick Antenna for LoRa RF part x 1
1955 * Bracket for controller x1
1956 * Program cable x 1
1957
1958 **Dimension and weight**:
1959
1960 * Device Size: 13.5 x 7 x 3 cm
1961 * Device Weight: 105g
1962 * Package Size / pcs : 14.5 x 8 x 5 cm
1963 * Weight / pcs : 170g
1964
1965
1966
1967 = 9. Support =
1968
1969 * (((
1970 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.
1971 )))
1972 * (((
1973 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]]
1974
1975
1976
1977
1978 )))
1979
1980 = 10. Reference​​​​​ =
1981
1982 * 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]]
1983 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1984 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1985 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
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