Version 83.5 by Xiaoling on 2022/06/29 17:24
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4
5
6 **Table of Contents:**
7
8 {{toc/}}
9
10
11
12
13
14
15
16 = 1.Introduction =
17
18 == 1.1 What is LT Series I/O Controller ==
19
20 (((
21
22
23 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.
24 )))
25
26 (((
27 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.
28 )))
29
30 (((
31 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
32 )))
33
34 (((
35 The use environment includes:
36 )))
37
38 (((
39 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.
40 )))
41
42 (((
43 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
44 )))
45
46 (((
47 [[image:1653295757274-912.png]]
48
49
50 )))
51
52
53 == 1.2  Specifications ==
54
55 (((
56
57
58 **Hardware System:**
59 )))
60
61 * (((
62 STM32L072CZT6 MCU
63 )))
64 * (((
65 SX1276/78 Wireless Chip 
66 )))
67 * (((
68 (((
69 Power Consumption:
70 )))
71
72 * (((
73 Idle: 4mA@12v
74 )))
75 * (((
76 20dB Transmit: 34mA@12v
77 )))
78 )))
79
80 (((
81
82
83 **Interface for Model: LT22222-L:**
84 )))
85
86 * (((
87 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
88 )))
89 * (((
90 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
91 )))
92 * (((
93 2 x Relay Output (5A@250VAC / 30VDC)
94 )))
95 * (((
96 2 x 0~~20mA Analog Input (res:0.01mA)
97 )))
98 * (((
99 2 x 0~~30V Analog Input (res:0.01v)
100 )))
101 * (((
102 Power Input 7~~ 24V DC. 
103 )))
104
105 (((
106
107
108 **LoRa Spec:**
109 )))
110
111 * (((
112 (((
113 Frequency Range:
114 )))
115
116 * (((
117 Band 1 (HF): 862 ~~ 1020 Mhz
118 )))
119 * (((
120 Band 2 (LF): 410 ~~ 528 Mhz
121 )))
122 )))
123 * (((
124 168 dB maximum link budget.
125 )))
126 * (((
127 +20 dBm - 100 mW constant RF output vs.
128 )))
129 * (((
130 +14 dBm high efficiency PA.
131 )))
132 * (((
133 Programmable bit rate up to 300 kbps.
134 )))
135 * (((
136 High sensitivity: down to -148 dBm.
137 )))
138 * (((
139 Bullet-proof front end: IIP3 = -12.5 dBm.
140 )))
141 * (((
142 Excellent blocking immunity.
143 )))
144 * (((
145 Low RX current of 10.3 mA, 200 nA register retention.
146 )))
147 * (((
148 Fully integrated synthesizer with a resolution of 61 Hz.
149 )))
150 * (((
151 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
152 )))
153 * (((
154 Built-in bit synchronizer for clock recovery.
155 )))
156 * (((
157 Preamble detection.
158 )))
159 * (((
160 127 dB Dynamic Range RSSI.
161 )))
162 * (((
163 Automatic RF Sense and CAD with ultra-fast AFC.
164 )))
165 * (((
166 Packet engine up to 256 bytes with CRC.
167
168
169
170 )))
171
172 == 1.3 Features ==
173
174 * LoRaWAN Class A & Class C protocol
175 * Optional Customized LoRa Protocol
176 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
177 * AT Commands to change parameters
178 * Remote configure parameters via LoRa Downlink
179 * Firmware upgradable via program port
180 * Counting
181
182
183 == 1.4  Applications ==
184
185 * Smart Buildings & Home Automation
186 * Logistics and Supply Chain Management
187 * Smart Metering
188 * Smart Agriculture
189 * Smart Cities
190 * Smart Factory
191
192
193 == 1.5 Hardware Variants ==
194
195 (% border="1" style="background-color:#f7faff; width:500px" %)
196 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
197 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
198 * 2 x Digital Input (Bi-direction)
199 * 2 x Digital Output
200 * 2 x Relay Output (5A@250VAC / 30VDC)
201 * 2 x 0~~20mA Analog Input (res:0.01mA)
202 * 2 x 0~~30V Analog Input (res:0.01v)
203 * 1 x Counting Port
204 )))
205
206
207 = 2. Power ON Device =
208
209 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.
210
211 (((
212 PWR will on when device is properly powered.
213 )))
214
215 [[image:1653297104069-180.png]]
216
217
218
219 = 3. Operation Mode =
220
221 == 3.1 How it works? ==
222
223 (((
224 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 (% style="color:green" %)**TX LED**(%%) will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. (% style="color:green" %)**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. 
225 )))
226
227 (((
228 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.
229 )))
230
231
232 == 3.2 Example to join LoRaWAN network ==
233
234 (((
235 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. 
236 )))
237
238 [[image:image-20220523172350-1.png||height="266" width="864"]]
239
240
241 (((
242 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:
243 )))
244
245 (((
246 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
247 )))
248
249 (((
250 Each LT is shipped with a sticker with the default device EUI as below:
251 )))
252
253 [[image:1653297924498-393.png]]
254
255
256 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
257
258 Add APP EUI in the application.
259
260 [[image:1653297955910-247.png||height="321" width="716"]]
261
262
263 Add APP KEY and DEV EUI
264
265 [[image:1653298023685-319.png]]
266
267
268 (((
269 (% 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.
270 )))
271
272 [[image:1653298044601-602.png||height="405" width="709"]]
273
274
275
276 == 3.3 Uplink Payload ==
277
278 There are five working modes + one interrupt mode on LT for different type application:
279
280 * **(% style="color:blue" %)MOD1**(%%): (default setting): 2 x ACI + 2AVI + DI + DO + RO
281 * **(% style="color:blue" %)MOD2**(%%): Double DI Counting + DO + RO
282 * **(% style="color:blue" %)MOD3**(%%): Single DI Counting + 2 x ACI + DO + RO
283 * **(% style="color:blue" %)MOD4**(%%): Single DI Counting + 1 x Voltage Counting + DO + RO
284 * **(% style="color:blue" %)MOD5**(%%): Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
285 * **(% style="color:blue" %)ADDMOD6**(%%): Trigger Mode, Optional, used together with MOD1 ~~ MOD5
286
287
288
289 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
290
291 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
292
293 [[image:image-20220523174024-3.png]]
294
295 (((
296
297
298 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
299 )))
300
301 [[image:image-20220523174254-4.png]]
302
303 * RO is for relay. ROx=1 : close，ROx=0 always open.
304 * DI is for digital input. DIx=1: high or float, DIx=0: low.
305 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
306
307 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
308
309 For example if payload is: [[image:image-20220523175847-2.png]]
310
311
312 **The value for the interface is:  **
313
314 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
315
316 AVI2 channel voltage is 0x04AC/1000=1.196V
317
318 ACI1 channel current is 0x1310/1000=4.880mA
319
320 ACI2 channel current is 0x1300/1000=4.864mA
321
322 The last byte 0xAA= 10101010(B) means
323
324 * [1] RO1 relay channel is close and the RO1 LED is ON.
325 * [0] RO2 relay channel is open and RO2 LED is OFF;
326
327 **LT22222-L:**
328
329 * [1] DI2 channel is high input and DI2 LED is ON;
330 * [0] DI1 channel is low input;
331
332 * [0] DO3 channel output state
333 ** DO3 is float in case no load between DO3 and V+.;
334 ** DO3 is high in case there is load between DO3 and V+.
335 ** DO3 LED is off in both case
336 * [1] DO2 channel output is low and DO2 LED is ON.
337 * [0] DO1 channel output state
338 ** DO1 is float in case no load between DO1 and V+.;
339 ** DO1 is high in case there is load between DO1 and V+.
340 ** DO1 LED is off in both case
341
342 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
343
344
345 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
346
347 (((
348 Total : 11 bytes payload
349 )))
350
351 [[image:image-20220523180452-3.png]]
352
353
354 (((
355 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
356 )))
357
358 [[image:image-20220523180506-4.png]]
359
360 * RO is for relay. ROx=1 : close，ROx=0 always open.
361 * FIRST: Indicate this is the first packet after join network.
362 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
363
364 (((
365 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
366 )))
367
368 (((
369
370
371 **To use counting mode, please run:**
372 )))
373
374 (% class="box infomessage" %)
375 (((
376 (((
377 **AT+MOD=2**
378
379 **ATZ**
380 )))
381 )))
382
383 (((
384
385
386 (% style="color:#4f81bd" %)**AT Commands for counting:**
387 )))
388
389 (((
390 **For LT22222-L:**
391
392
393 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
394
395 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
396
397 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
398
399 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
400
401 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
402
403 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
404 )))
405
406
407
408 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
409
410 **LT22222-L**: This mode the DI1 is used as a counting pin.
411
412 [[image:image-20220523181246-5.png]]
413
414 (((
415 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
416 )))
417
418 [[image:image-20220523181301-6.png]]
419
420 * RO is for relay. ROx=1 : close，ROx=0 always open.
421 * FIRST: Indicate this is the first packet after join network.
422 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
423
424 (((
425 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
426 )))
427
428 (((
429 **To use counting mode, please run:**
430 )))
431
432 (% class="box infomessage" %)
433 (((
434 (((
435 **AT+MOD=3**
436
437 **ATZ**
438 )))
439 )))
440
441 (((
442 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
443 )))
444
445
446
447 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
448
449
450 **LT22222-L**: This mode the DI1 is used as a counting pin.
451
452 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.
453
454 [[image:image-20220523181903-8.png]]
455
456
457 (((
458 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
459 )))
460
461 [[image:image-20220523181727-7.png]]
462
463 * RO is for relay. ROx=1 : close，ROx=0 always open.
464 * FIRST: Indicate this is the first packet after join network.
465 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
466
467 (((
468 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
469 )))
470
471 (((
472
473
474 **To use this mode, please run:**
475 )))
476
477 (% class="box infomessage" %)
478 (((
479 (((
480 **AT+MOD=4**
481
482 **ATZ**
483 )))
484 )))
485
486
487
488 (((
489 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
490 )))
491
492 (((
493
494
495 **Plus below command for AVI1 Counting:**
496
497
498 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
499
500 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
501
502 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
503
504 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
505 )))
506
507
508
509 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
510
511
512 **LT22222-L**: This mode the DI1 is used as a counting pin.
513
514 [[image:image-20220523182334-9.png]]
515
516 (((
517
518
519 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
520 )))
521
522 * RO is for relay. ROx=1 : close，ROx=0 always open.
523 * FIRST: Indicate this is the first packet after join network.
524 * (((
525 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
526 )))
527
528 (((
529 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
530 )))
531
532 (((
533
534
535 **To use this mode, please run:**
536 )))
537
538 (% class="box infomessage" %)
539 (((
540 (((
541 **AT+MOD=5**
542
543 **ATZ**
544 )))
545 )))
546
547 (((
548 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
549 )))
550
551
552
553 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
554
555
556 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
557
558 For example, if user has configured below commands:
559
560 * **AT+MOD=1 ** **~-~->** The normal working mode
561 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
562
563 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
564
565 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
566 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.**
567
568 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
569
570 (% style="color:#4f81bd" %)**Trigger base on voltage**:
571
572 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
573
574 **Example:**
575
576 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)
577
578 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
579
580
581
582 (% style="color:#4f81bd" %)**Trigger base on current**:
583
584 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
585
586 **Example:**
587
588 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
589
590
591
592 (% style="color:#4f81bd" %)**Trigger base on DI status**:
593
594 DI status trigger Flag.
595
596 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
597
598
599 **Example:**
600
601 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
602
603
604 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
605
606 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
607
608 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
609
610 AA: Code for this downlink Command:
611
612 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
613
614 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
615
616 yy2 yy2: AC1 or AV1 high limit.
617
618 yy3 yy3: AC2 or AV2 low limit.
619
620 Yy4 yy4: AC2 or AV2 high limit.
621
622
623 **Example1**: AA 00 13 88 00 00 00 00 00 00
624
625 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
626
627
628 **Example2**: AA 02 01 00
629
630 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
631
632
633
634 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
635
636 MOD6 Payload : total 11 bytes payload
637
638 [[image:image-20220524085923-1.png]]
639
640
641 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
642
643 [[image:image-20220524090106-2.png]]
644
645 * Each bits shows if the corresponding trigger has been configured.
646
647 **Example:**
648
649 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
650
651
652 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
653
654 [[image:image-20220524090249-3.png]]
655
656 * Each bits shows which status has been trigger on this uplink.
657
658 **Example:**
659
660 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
661
662
663 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
664
665 [[image:image-20220524090456-4.png]]
666
667 * Each bits shows which status has been trigger on this uplink.
668
669 **Example:**
670
671 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
672
673 00000101: Means both DI1 and DI2 trigger are enabled.
674
675
676 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
677
678 Downlink command to poll MOD6 status:
679
680 **AB 06**
681
682 When device got this command, it will send the MOD6 payload.
683
684
685
686 === 3.3.7 Payload Decoder ===
687
688 (((
689
690
691 **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/]]
692
693
694 )))
695
696
697 == 3.4 ​Configure LT via AT or Downlink ==
698
699 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
700
701 (((
702 There are two kinds of Commands:
703 )))
704
705 * (% 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]]
706
707 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
708
709 === 3.4.1 Common Commands ===
710
711 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]]
712
713
714
715 === 3.4.2 Sensor related commands ===
716
717 ==== 3.4.2.1 Set Transmit Interval ====
718
719 Set device uplink interval.
720
721 * (% style="color:#037691" %)**AT Command:**
722
723 **AT+TDC=N **
724
725
726 **Example: **AT+TDC=30000. Means set interval to 30 seconds
727
728
729 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
730
731 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
732
733
734
735
736 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
737
738 Set work mode.
739
740 * (% style="color:#037691" %)**AT Command:**
741
742 **AT+MOD=N  **
743
744
745 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
746
747
748 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
749
750 **0x0A aa    ** ~/~/ Same as AT+MOD=aa
751
752
753
754
755 ==== 3.4.2.3 Poll an uplink ====
756
757 * (% style="color:#037691" %)**AT Command:**
758
759 There is no AT Command to poll uplink
760
761
762 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
763
764 **0x08 FF     **~/~/ Poll an uplink
765
766 **Example**: 0x08FF, ask device to send an Uplink
767
768
769
770 ==== 3.4.2.4 Enable Trigger Mode ====
771
772 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
773
774 * (% style="color:#037691" %)**AT Command:**
775
776 **AT+ADDMOD6=1 or 0**
777
778 1: Enable Trigger Mode
779
780 0: Disable Trigger Mode
781
782
783 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
784
785 **0x0A 06 aa    ** ~/~/ Same as AT+ADDMOD6=aa
786
787
788
789
790 ==== 3.4.2.5 Poll trigger settings ====
791
792 Poll trigger settings,
793
794 * (% style="color:#037691" %)**AT Command:**
795
796 There is no AT Command for this feature.
797
798
799 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
800
801 **0xAB 06         **~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
802
803
804
805
806 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
807
808 Enable Disable DI1/DI2/DI2 as trigger,
809
810 * (% style="color:#037691" %)**AT Command:**
811
812 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
813
814
815 **Example:**
816
817 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
818
819 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
820
821 **0xAA 02 aa bb        **~/~/ Same as AT+DTRI=aa,bb
822
823
824
825
826 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
827
828 Set DI1 or DI3(for LT-33222-L) trigger.
829
830 * (% style="color:#037691" %)**AT Command:**
831
832 **AT+TRIG1=a,b**
833
834 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
835
836 b : delay timing.
837
838
839 **Example:**
840
841 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
842
843
844 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
845 * **0x09 01 aa bb cc    ** ~/~/ same as AT+TRIG1=aa,0x(bb cc)
846
847 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
848
849 Set DI2 trigger.
850
851 * (% style="color:#037691" %)**AT Command:**
852
853 **AT+TRIG2=a,b**
854
855
856 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
857
858 b : delay timing.
859
860
861 **Example:**
862
863 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
864
865
866 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
867
868 **0x09 02 aa bb cc           **~/~/ same as AT+TRIG1=aa,0x(bb cc)
869
870
871
872
873 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
874
875 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
876
877 * (% style="color:#037691" %)**AT Command**
878
879 **AT+ACLIM**
880
881
882 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
883
884 **0x AA 01 aa bb cc dd ee ff gg hh        ** ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
885
886
887
888
889 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
890
891 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
892
893 * (% style="color:#037691" %)**AT Command**
894
895 **AT+AVLIM  See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
896
897
898 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
899
900 **0x AA 00 aa bb cc dd ee ff gg hh    ** ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
901
902
903
904
905 ==== 3.4.2.11 Trigger – Set minimum interval ====
906
907 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
908
909 * (% style="color:#037691" %)**AT Command**
910
911 **AT+ATDC=5        ** Device won't response the second trigger within 5 minute after the first trigger.
912
913
914 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
915
916 **0x AC aa bb   ** ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
917
918 (((
919
920
921 (% style="color:red" %)Note: ATDC setting must be more than 5min
922 )))
923
924
925
926 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
927
928 * (% style="color:#037691" %)**AT Command**
929
930 There is no AT Command to control Digital Output
931
932
933 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
934 * **0x02 aa bb cc     **~/~/ Set DO1/DO2/DO3 output
935
936 (((
937 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
938 )))
939
940 (((
941 01: Low,  00: High ,  11: No action
942 )))
943
944 [[image:image-20220524092754-5.png]]
945
946 (((
947 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
948 )))
949
950 (((
951 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
952 )))
953
954
955
956
957 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
958
959 * (% style="color:#037691" %)**AT Command**
960
961 There is no AT Command to control Digital Output
962
963
964 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
965
966 **0xA9 aa bb cc     **~/~/ Set DO1/DO2/DO3 output with time control
967
968
969 This is to control the digital output time of DO pin. Include four bytes:
970
971 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
972
973 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
974
975 01: DO pins will change back to original state after timeout.
976
977 00: DO pins will change to an inverter state after timeout 
978
979
980 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
981
982 [[image:image-20220524093238-6.png]]
983
984
985 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
986
987 [[image:image-20220524093328-7.png]]
988
989
990 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
991
992 [[image:image-20220524093351-8.png]]
993
994
995 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
996
997 Latching time. Unit: ms
998
999 Device will upload a packet if downlink code executes successfully.
1000
1001
1002 **Example payload:**
1003
1004 **~1. A9 01 01 01 01 07 D0**
1005
1006 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1007
1008 **2. A9 01 00 01 11 07 D0**
1009
1010 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1011
1012 **3. A9 00 00 00 00 07 D0**
1013
1014 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1015
1016 **4. A9 00 11 01 00 07 D0**
1017
1018 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
1019
1020
1021
1022
1023 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1024
1025 * (% style="color:#037691" %)**AT Command:**
1026
1027 There is no AT Command to control Relay Output
1028
1029
1030 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1031
1032 **0x03 aa bb     **~/~/ Set RO1/RO2 output
1033
1034
1035 (((
1036 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1037 )))
1038
1039 (((
1040 01: Close ,  00: Open , 11: No action
1041 )))
1042
1043 (((
1044 [[image:image-20220524093724-9.png]]
1045 )))
1046
1047 Device will upload a packet if downlink code executes successfully.
1048
1049
1050
1051
1052 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1053
1054 * (% style="color:#037691" %)**AT Command:**
1055
1056 There is no AT Command to control Relay Output
1057
1058
1059 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1060
1061 **0x05 aa bb cc dd     **~/~/ Set RO1/RO2 relay with time control
1062
1063
1064 This is to control the relay output time of relay. Include four bytes:
1065
1066 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1067
1068 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1069
1070 01: Relays will change back to original state after timeout.
1071
1072 00: Relays will change to an inverter state after timeout
1073
1074
1075 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1076
1077 [[image:image-20220524093831-10.png]]
1078
1079
1080 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1081
1082 Device will upload a packet if downlink code executes successfully.
1083
1084
1085 **Example payload:**
1086
1087 **~1. 05 01 11 07 D0**
1088
1089 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1090
1091 **2. 05 01 10 07 D0**
1092
1093 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1094
1095 **3. 05 00 01 07 D0**
1096
1097 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1098
1099 **4. 05 00 00 07 D0**
1100
1101 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1102
1103
1104
1105
1106 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1107
1108 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1109
1110 * (% style="color:#037691" %)**AT Command:**
1111
1112 **AT+VOLMAX   ** ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1113
1114
1115 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1116
1117 **0xA5 aa bb cc   **~/~/ Same as AT+VOLMAX=(aa bb),cc
1118
1119
1120
1121
1122 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1123
1124 * (% style="color:#037691" %)**AT Command:**
1125
1126 **AT+SETCNT=aa,(bb cc dd ee) **
1127
1128 aa: 1: Set count1,
1129
1130 2: Set count2,
1131
1132 3: Set AV1 count
1133
1134 Bb cc dd ee: number to be set
1135
1136
1137 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1138
1139 **0x A8 aa bb cc dd ee     **~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1140
1141
1142
1143
1144 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1145
1146 Clear counting for counting mode
1147
1148 * (% style="color:#037691" %)**AT Command:**
1149
1150 **AT+CLRCOUNT ** ~/~/ clear all counting
1151
1152
1153 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1154
1155 **0x A6 01    ** ~/~/ clear all counting
1156
1157
1158
1159
1160 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1161
1162 * (% style="color:#037691" %)**AT Command:**
1163
1164 **AT+COUTIME=60  **~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1165
1166
1167 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1168
1169 **0x A7 aa bb cc     **~/~/ same as AT+COUTIME =aa bb cc,
1170
1171 (((
1172 range: aa bb cc:0 to 16777215,  (unit:second)
1173
1174
1175 )))
1176
1177
1178
1179 == 3.5 Integrate with Mydevice ==
1180
1181 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:
1182
1183 (((
1184 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1185 )))
1186
1187 (((
1188 (% 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:
1189 )))
1190
1191 [[image:1653356737703-362.png||height="232" width="732"]]
1192
1193 [[image:image-20220524094641-11.png||height="390" width="723"]]
1194
1195
1196 [[image:image-20220524094641-12.png||height="402" width="718"]]
1197
1198
1199 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1200
1201 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1202
1203 Search under The things network
1204
1205 [[image:1653356838789-523.png||height="337" width="740"]]
1206
1207
1208
1209 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1210
1211 [[image:image-20220524094909-1.png||height="335" width="729"]]
1212
1213
1214 [[image:image-20220524094909-2.png||height="337" width="729"]]
1215
1216
1217 [[image:image-20220524094909-3.png||height="338" width="727"]]
1218
1219
1220 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1221
1222
1223 [[image:image-20220524094909-5.png||height="341" width="734"]]
1224
1225
1226
1227 == 3.6 Interface Detail ==
1228
1229 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1230
1231 Support NPN Type sensor
1232
1233 [[image:1653356991268-289.png]]
1234
1235
1236
1237 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1238
1239 (((
1240 The DI port of LT-22222-L can support NPN or PNP output sensor.
1241 )))
1242
1243 (((
1244 (((
1245 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
1246 )))
1247 )))
1248
1249 [[image:1653357170703-587.png]]
1250
1251 (((
1252 (((
1253 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1254 )))
1255 )))
1256
1257 (((
1258
1259 )))
1260
1261 (((
1262 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1263 )))
1264
1265 (((
1266 This type of sensor will output a low signal GND when active.
1267 )))
1268
1269 * (((
1270 Connect sensor’s output to DI1-
1271 )))
1272 * (((
1273 Connect sensor’s VCC to DI1+.
1274 )))
1275
1276 (((
1277 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1278 )))
1279
1280 (((
1281 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1282 )))
1283
1284 (((
1285 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.
1286 )))
1287
1288 (((
1289
1290 )))
1291
1292 (((
1293 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1294 )))
1295
1296 (((
1297 This type of sensor will output a high signal (example 24v) when active.
1298 )))
1299
1300 * (((
1301 Connect sensor’s output to DI1+
1302 )))
1303 * (((
1304 Connect sensor’s GND DI1-.
1305 )))
1306
1307 (((
1308 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1309 )))
1310
1311 (((
1312 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1313 )))
1314
1315 (((
1316 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.
1317 )))
1318
1319 (((
1320
1321 )))
1322
1323 (((
1324 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1325 )))
1326
1327 (((
1328 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1329 )))
1330
1331 * (((
1332 Connect sensor’s output to DI1+ with a serial 50K resistor
1333 )))
1334 * (((
1335 Connect sensor’s GND DI1-.
1336 )))
1337
1338 (((
1339 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1340 )))
1341
1342 (((
1343 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1344 )))
1345
1346 (((
1347 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.
1348 )))
1349
1350
1351
1352 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1353
1354 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1355
1356 [[image:1653357531600-905.png]]
1357
1358
1359
1360 === 3.6.4 Analog Input Interface ===
1361
1362 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:
1363
1364
1365 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1366
1367 [[image:1653357592296-182.png]]
1368
1369 Example to connect a 4~~20mA sensor
1370
1371 We take the wind speed sensor as an example for reference only.
1372
1373
1374 **Specifications of the wind speed sensor:**
1375
1376 Red:  12~~24v
1377
1378 Yellow:  4~~20mA
1379
1380 Black:  GND
1381
1382
1383 **Connection diagram:**
1384
1385 [[image:1653357640609-758.png]]
1386
1387 [[image:1653357648330-671.png||height="155" width="733"]]
1388
1389
1390
1391 === 3.6.5 Relay Output ===
1392
1393 (((
1394 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:
1395 )))
1396
1397 [[image:image-20220524100215-9.png]]
1398
1399 [[image:image-20220524100215-10.png||height="382" width="723"]]
1400
1401
1402
1403 == 3.7 LEDs Indicators ==
1404
1405 [[image:image-20220524100748-11.png]]
1406
1407
1408
1409 = 4. Use AT Command =
1410
1411 == 4.1 Access AT Command ==
1412
1413 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.
1414
1415 [[image:1653358238933-385.png]]
1416
1417
1418 (((
1419 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:
1420 )))
1421
1422 [[image:1653358355238-883.png]]
1423
1424
1425 (((
1426 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/]]
1427 )))
1428
1429 (((
1430 AT+<CMD>?        : Help on <CMD>
1431 )))
1432
1433 (((
1434 AT+<CMD>         : Run <CMD>
1435 )))
1436
1437 (((
1438 AT+<CMD>=<value> : Set the value
1439 )))
1440
1441 (((
1442 AT+<CMD>=?       : Get the value
1443 )))
1444
1445 (((
1446 ATZ: Trig a reset of the MCU
1447 )))
1448
1449 (((
1450 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1451 )))
1452
1453 (((
1454 AT+DEUI: Get or Set the Device EUI
1455 )))
1456
1457 (((
1458 AT+DADDR: Get or Set the Device Address
1459 )))
1460
1461 (((
1462 AT+APPKEY: Get or Set the Application Key
1463 )))
1464
1465 (((
1466 AT+NWKSKEY: Get or Set the Network Session Key
1467 )))
1468
1469 (((
1470 AT+APPSKEY: Get or Set the Application Session Key
1471 )))
1472
1473 (((
1474 AT+APPEUI: Get or Set the Application EUI
1475 )))
1476
1477 (((
1478 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1479 )))
1480
1481 (((
1482 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1483 )))
1484
1485 (((
1486 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1487 )))
1488
1489 (((
1490 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1491 )))
1492
1493 (((
1494 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1495 )))
1496
1497 (((
1498 AT+RX2FQ: Get or Set the Rx2 window frequency
1499 )))
1500
1501 (((
1502 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1503 )))
1504
1505 (((
1506 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1507 )))
1508
1509 (((
1510 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1511 )))
1512
1513 (((
1514 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1515 )))
1516
1517 (((
1518 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1519 )))
1520
1521 (((
1522 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1523 )))
1524
1525 (((
1526 AT+NWKID: Get or Set the Network ID
1527 )))
1528
1529 (((
1530 AT+FCU: Get or Set the Frame Counter Uplink
1531 )))
1532
1533 (((
1534 AT+FCD: Get or Set the Frame Counter Downlink
1535 )))
1536
1537 (((
1538 AT+CLASS: Get or Set the Device Class
1539 )))
1540
1541 (((
1542 AT+JOIN: Join network
1543 )))
1544
1545 (((
1546 AT+NJS: Get OTAA Join Status
1547 )))
1548
1549 (((
1550 AT+SENDB: Send hexadecimal data along with the application port
1551 )))
1552
1553 (((
1554 AT+SEND: Send text data along with the application port
1555 )))
1556
1557 (((
1558 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1559 )))
1560
1561 (((
1562 AT+RECV: Print last received data in raw format
1563 )))
1564
1565 (((
1566 AT+VER: Get current image version and Frequency Band
1567 )))
1568
1569 (((
1570 AT+CFM: Get or Set the confirmation mode (0-1)
1571 )))
1572
1573 (((
1574 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1575 )))
1576
1577 (((
1578 AT+SNR: Get the SNR of the last received packet
1579 )))
1580
1581 (((
1582 AT+RSSI: Get the RSSI of the last received packet
1583 )))
1584
1585 (((
1586 AT+TDC: Get or set the application data transmission interval in ms
1587 )))
1588
1589 (((
1590 AT+PORT: Get or set the application port
1591 )))
1592
1593 (((
1594 AT+DISAT: Disable AT commands
1595 )))
1596
1597 (((
1598 AT+PWORD: Set password, max 9 digits
1599 )))
1600
1601 (((
1602 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1603 )))
1604
1605 (((
1606 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1607 )))
1608
1609 (((
1610 AT+CFG: Print all settings
1611 )))
1612
1613
1614
1615 == 4.2 Common AT Command Sequence ==
1616
1617 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1618
1619 (((
1620
1621
1622 **If device has not joined network yet:**
1623 )))
1624
1625 (((
1626 (% style="background-color:#dcdcdc" %)123456
1627 )))
1628
1629 (((
1630 (% style="background-color:#dcdcdc" %)AT+FDR
1631 )))
1632
1633 (((
1634 (% style="background-color:#dcdcdc" %)123456
1635 )))
1636
1637 (((
1638 (% style="background-color:#dcdcdc" %)AT+NJM=0
1639 )))
1640
1641 (((
1642 (% style="background-color:#dcdcdc" %)ATZ
1643 )))
1644
1645
1646 (((
1647 **If device already joined network:**
1648 )))
1649
1650 (((
1651 (% style="background-color:#dcdcdc" %)AT+NJM=0
1652 )))
1653
1654 (((
1655 (% style="background-color:#dcdcdc" %)ATZ
1656 )))
1657
1658
1659
1660 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1661
1662 (((
1663
1664
1665 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1666 )))
1667
1668 (((
1669 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1670 )))
1671
1672 (((
1673 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1674 )))
1675
1676 (((
1677 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1678 )))
1679
1680 (((
1681 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1682 )))
1683
1684 (((
1685 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1686 )))
1687
1688 (((
1689 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1690 )))
1691
1692 (((
1693 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1694 )))
1695
1696 (((
1697 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1698 )))
1699
1700 (((
1701 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1702 )))
1703
1704 (((
1705 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1706 )))
1707
1708 (((
1709 (% 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.
1710 )))
1711
1712 (((
1713 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1714
1715
1716 )))
1717
1718 (((
1719 (% style="color:red" %)**Note:**
1720 )))
1721
1722 (((
1723 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1724 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1725 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.
1726 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
1727 )))
1728
1729 (((
1730 [[image:1653359097980-169.png||height="188" width="729"]]
1731 )))
1732
1733 (((
1734
1735 )))
1736
1737
1738 === 4.2.3 Change to Class A ===
1739
1740 If sensor JOINED
1741 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1742 ATZ
1743
1744
1745 = 5. FAQ =
1746
1747 == 5.1 How to upgrade the image? ==
1748
1749
1750 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1751
1752 * Support new features
1753 * For bug fix
1754 * Change LoRaWAN bands.
1755
1756 Below shows the hardware connection for how to upload an image to the LT:
1757
1758 [[image:1653359603330-121.png]]
1759
1760
1761 (((
1762 (% 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]].
1763 (% 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/]].
1764 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1765
1766
1767 (% style="color:blue" %)**For LT-22222-L**(%%):
1768 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.
1769 )))
1770
1771 [[image:image-20220524103407-12.png]]
1772
1773 [[image:image-20220524103429-13.png]]
1774
1775 [[image:image-20220524104033-15.png]]
1776
1777
1778 (% 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:
1779
1780 [[image:1653360054704-518.png||height="186" width="745"]]
1781
1782
1783 (((
1784 (((
1785
1786
1787 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1788 )))
1789 )))
1790
1791 (((
1792 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1793 )))
1794
1795 (((
1796
1797
1798 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1799 )))
1800
1801 (((
1802 (((
1803 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1804 )))
1805 )))
1806
1807 (((
1808 (((
1809 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1810
1811
1812 )))
1813 )))
1814
1815 (((
1816 (% 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.
1817 )))
1818
1819 (((
1820 [[image:1653360231087-571.png||height="401" width="727"]]
1821 )))
1822
1823 (((
1824 (% 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.
1825 )))
1826
1827
1828 (((
1829 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1830 )))
1831
1832 (((
1833 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1834 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1835 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1836 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1837 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1838 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1839 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1840 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1841 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1842 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1843 )))
1844
1845
1846 (((
1847 As shown in below:
1848 )))
1849
1850 [[image:1653360498588-932.png||height="485" width="726"]]
1851
1852
1853 == 5.4 Can I see counting event in Serial? ==
1854
1855 (((
1856 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.
1857
1858
1859 == 5.5 Can i use point to point communication for LT-22222-L? ==
1860
1861 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1862
1863
1864 )))
1865
1866 (((
1867 == 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
1868
1869 If the device is not shut down, but directly powered off.
1870
1871 It will default that this is a power-off state.
1872
1873 In modes 2 to 5, DO RO status and pulse count are saved in flash.
1874
1875 After restart, the status before power failure will be read from flash.
1876
1877
1878 = 6. Trouble Shooting =
1879 )))
1880
1881 (((
1882 (((
1883 == 6.1 Downlink doesn’t work, how to solve it? ==
1884 )))
1885 )))
1886
1887 (((
1888 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1889 )))
1890
1891 (((
1892
1893
1894 == 6.2 Have trouble to upload image. ==
1895 )))
1896
1897 (((
1898 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1899 )))
1900
1901 (((
1902
1903
1904 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1905 )))
1906
1907 (((
1908 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1909 )))
1910
1911
1912 = 7. Order Info =
1913
1914 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1915
1916
1917 (% style="color:#4f81bd" %)**XXX:**
1918
1919 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1920 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1921 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1922 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1923 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1924 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1925 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1926 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1927 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1928
1929 = 8. Packing Info =
1930
1931
1932 **Package Includes**:
1933
1934 * LT-22222-L I/O Controller x 1
1935 * Stick Antenna for LoRa RF part x 1
1936 * Bracket for controller x1
1937 * Program cable x 1
1938
1939 **Dimension and weight**:
1940
1941 * Device Size: 13.5 x 7 x 3 cm
1942 * Device Weight: 105g
1943 * Package Size / pcs : 14.5 x 8 x 5 cm
1944 * Weight / pcs : 170g
1945
1946 = 9. Support =
1947
1948 * (((
1949 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.
1950 )))
1951 * (((
1952 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]]
1953
1954
1955
1956
1957 )))
1958
1959 = 10. Reference​​​​​ =
1960
1961 * 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]]
1962 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1963 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1964 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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