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Version 75.10 by Xiaoling on 2022/06/01 17:29
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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 = 1.Introduction =
15
16 == 1.1 What is LT Series I/O Controller ==
17
18 (((
19 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.
20 )))
21
22 (((
23 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.
24 )))
25
26 (((
27 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
28 )))
29
30 (((
31 The use environment includes:
32 )))
33
34 (((
35 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.
36 )))
37
38 (((
39 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
40 )))
41
42 (((
43 [[image:1653295757274-912.png]]
44
45
46 )))
47
48 == 1.2  Specifications ==
49
50 (((
51 **Hardware System:**
52 )))
53
54 * (((
55 STM32L072CZT6 MCU
56 )))
57 * (((
58 SX1276/78 Wireless Chip 
59 )))
60 * (((
61 (((
62 Power Consumption:
63 )))
64
65 * (((
66 Idle: 4mA@12v
67 )))
68 * (((
69 20dB Transmit: 34mA@12v
70 )))
71 )))
72
73 (((
74 **Interface for Model: LT22222-L:**
75 )))
76
77 * (((
78 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
79 )))
80 * (((
81 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
82 )))
83 * (((
84 2 x Relay Output (5A@250VAC / 30VDC)
85 )))
86 * (((
87 2 x 0~~20mA Analog Input (res:0.01mA)
88 )))
89 * (((
90 2 x 0~~30V Analog Input (res:0.01v)
91 )))
92 * (((
93 Power Input 7~~ 24V DC. 
94 )))
95
96 (((
97 **LoRa Spec:**
98 )))
99
100 * (((
101 (((
102 Frequency Range:
103 )))
104
105 * (((
106 Band 1 (HF): 862 ~~ 1020 Mhz
107 )))
108 * (((
109 Band 2 (LF): 410 ~~ 528 Mhz
110 )))
111 )))
112 * (((
113 168 dB maximum link budget.
114 )))
115 * (((
116 +20 dBm - 100 mW constant RF output vs.
117 )))
118 * (((
119 +14 dBm high efficiency PA.
120 )))
121 * (((
122 Programmable bit rate up to 300 kbps.
123 )))
124 * (((
125 High sensitivity: down to -148 dBm.
126 )))
127 * (((
128 Bullet-proof front end: IIP3 = -12.5 dBm.
129 )))
130 * (((
131 Excellent blocking immunity.
132 )))
133 * (((
134 Low RX current of 10.3 mA, 200 nA register retention.
135 )))
136 * (((
137 Fully integrated synthesizer with a resolution of 61 Hz.
138 )))
139 * (((
140 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
141 )))
142 * (((
143 Built-in bit synchronizer for clock recovery.
144 )))
145 * (((
146 Preamble detection.
147 )))
148 * (((
149 127 dB Dynamic Range RSSI.
150 )))
151 * (((
152 Automatic RF Sense and CAD with ultra-fast AFC.
153 )))
154 * (((
155 Packet engine up to 256 bytes with CRC.
156
157
158 )))
159
160 == 1.3 Features ==
161
162 * LoRaWAN Class A & Class C protocol
163 * Optional Customized LoRa Protocol
164 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
165 * AT Commands to change parameters
166 * Remote configure parameters via LoRa Downlink
167 * Firmware upgradable via program port
168 * Counting
169
170
171
172 == 1.4  Applications ==
173
174 * Smart Buildings & Home Automation
175 * Logistics and Supply Chain Management
176 * Smart Metering
177 * Smart Agriculture
178 * Smart Cities
179 * Smart Factory
180
181
182
183 == 1.5 Hardware Variants ==
184
185 (% border="1" style="background-color:#f7faff; width:500px" %)
186 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
187 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
188 * 2 x Digital Input (Bi-direction)
189 * 2 x Digital Output
190 * 2 x Relay Output (5A@250VAC / 30VDC)
191 * 2 x 0~~20mA Analog Input (res:0.01mA)
192 * 2 x 0~~30V Analog Input (res:0.01v)
193 * 1 x Counting Port
194 )))
195
196
197
198 = 2. Power ON Device =
199
200 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.
201
202 (((
203 PWR will on when device is properly powered.
204 )))
205
206 [[image:1653297104069-180.png]]
207
208
209 = 3. Operation Mode =
210
211 == 3.1 How it works? ==
212
213 (((
214 The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on **TX LED** will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. **TX LED** will be on for 5 seconds after joined in network. When there is message from server, the **RX LED** will be on for 1 second. 
215 )))
216
217 (((
218 In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>||anchor="H4.UseATCommand"]] to set the keys in the devices.
219
220
221 )))
222
223 == 3.2 Example to join LoRaWAN network ==
224
225 (((
226 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. 
227 )))
228
229 [[image:image-20220523172350-1.png||height="266" width="864"]]
230
231 (((
232 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:
233 )))
234
235 (((
236 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
237 )))
238
239 (((
240 Each LT is shipped with a sticker with the default device EUI as below:
241 )))
242
243 [[image:1653297924498-393.png]]
244
245 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
246
247 Add APP EUI in the application.
248
249 [[image:1653297955910-247.png||height="321" width="716"]]
250
251
252 Add APP KEY and DEV EUI
253
254 [[image:1653298023685-319.png]]
255
256
257 (((
258 **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.
259 )))
260
261 [[image:1653298044601-602.png||height="405" width="709"]]
262
263
264 == 3.3 Uplink Payload ==
265
266 There are five working modes + one interrupt mode on LT for different type application:
267
268 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
269 * **MOD2**: Double DI Counting + DO + RO
270 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
271 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
272 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
273 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
274
275
276
277 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
278
279 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
280
281 [[image:image-20220523174024-3.png]]
282
283 (((
284 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
285 )))
286
287 [[image:image-20220523174254-4.png]]
288
289 * RO is for relay. ROx=1 : close，ROx=0 always open.
290 * DI is for digital input. DIx=1: high or float, DIx=0: low.
291 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
292
293 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
294
295 For example if payload is: [[image:image-20220523175847-2.png]]
296
297 **The value for the interface is:  **
298
299 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
300
301 AVI2 channel voltage is 0x04AC/1000=1.196V
302
303 ACI1 channel current is 0x1310/1000=4.880mA
304
305 ACI2 channel current is 0x1300/1000=4.864mA
306
307 The last byte 0xAA= 10101010(B) means
308
309 * [1] RO1 relay channel is close and the RO1 LED is ON.
310 * [0] RO2 relay channel is open and RO2 LED is OFF;
311
312 **LT22222-L:**
313
314 * [1] DI2 channel is high input and DI2 LED is ON;
315 * [0] DI1 channel is low input;
316
317 * [0] DO3 channel output state
318 ** DO3 is float in case no load between DO3 and V+.;
319 ** DO3 is high in case there is load between DO3 and V+.
320 ** DO3 LED is off in both case
321 * [1] DO2 channel output is low and DO2 LED is ON.
322 * [0] DO1 channel output state
323 ** DO1 is float in case no load between DO1 and V+.;
324 ** DO1 is high in case there is load between DO1 and V+.
325 ** DO1 LED is off in both case
326
327 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
328
329 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
330
331 (((
332 Total : 11 bytes payload
333 )))
334
335 [[image:image-20220523180452-3.png]]
336
337 (((
338 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
339 )))
340
341 [[image:image-20220523180506-4.png]]
342
343 * RO is for relay. ROx=1 : close，ROx=0 always open.
344 * FIRST: Indicate this is the first packet after join network.
345 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
346
347 (((
348 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
349 )))
350
351 (((
352 **To use counting mode, please run:**
353 )))
354
355 (% class="box infomessage" %)
356 (((
357 (((
358 **AT+MOD=2**
359 )))
360 )))
361
362 (% class="box infomessage" %)
363 (((
364 (((
365 **ATZ**
366 )))
367 )))
368
369 (((
370 (% style="color:#4f81bd" %)**AT Commands for counting:**
371 )))
372
373 (((
374 **For LT22222-L:**
375 )))
376
377 (% class="box infomessage" %)
378 (((
379 (((
380 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
381 )))
382 )))
383
384 (% class="box infomessage" %)
385 (((
386 (((
387 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
388 )))
389 )))
390
391 (% class="box infomessage" %)
392 (((
393 (((
394 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
395 )))
396 )))
397
398 (% class="box infomessage" %)
399 (((
400 (((
401 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
402 )))
403 )))
404
405 (% class="box infomessage" %)
406 (((
407 (((
408 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
409 )))
410 )))
411
412 (% class="box infomessage" %)
413 (((
414 (((
415 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
416 )))
417 )))
418
419
420 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
421
422 **LT22222-L**: This mode the DI1 is used as a counting pin.
423
424 [[image:image-20220523181246-5.png]]
425
426 (((
427 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
428 )))
429
430 [[image:image-20220523181301-6.png]]
431
432 * RO is for relay. ROx=1 : close，ROx=0 always open.
433 * FIRST: Indicate this is the first packet after join network.
434 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
435
436 (((
437 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
438 )))
439
440 (((
441 **To use counting mode, please run:**
442 )))
443
444 (% class="box infomessage" %)
445 (((
446 (((
447 **AT+MOD=3**
448 )))
449 )))
450
451 (% class="box infomessage" %)
452 (((
453 (((
454 **ATZ**
455 )))
456 )))
457
458 (((
459 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
460
461
462 )))
463
464 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
465
466 **LT22222-L**: This mode the DI1 is used as a counting pin.
467
468 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.
469
470 [[image:image-20220523181903-8.png]]
471
472 (((
473 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
474 )))
475
476 [[image:image-20220523181727-7.png]]
477
478 * RO is for relay. ROx=1 : close，ROx=0 always open.
479 * FIRST: Indicate this is the first packet after join network.
480 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
481
482 (((
483 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
484 )))
485
486 (((
487 **To use this mode, please run:**
488 )))
489
490 (% class="box infomessage" %)
491 (((
492 (((
493 **AT+MOD=4**
494 )))
495 )))
496
497 (% class="box infomessage" %)
498 (((
499 (((
500 **ATZ**
501 )))
502 )))
503
504 (((
505
506 )))
507
508 (((
509 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
510 )))
511
512 (((
513 **Plus below command for AVI1 Counting:**
514 )))
515
516 (% class="box infomessage" %)
517 (((
518 (((
519 **AT+SETCNT=3,60   (set AVI Count to 60)**
520 )))
521 )))
522
523 (% class="box infomessage" %)
524 (((
525 (((
526 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
527 )))
528 )))
529
530 (% class="box infomessage" %)
531 (((
532 (((
533 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
534 )))
535 )))
536
537 (% class="box infomessage" %)
538 (((
539 (((
540 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
541 )))
542 )))
543
544
545 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
546
547 **LT22222-L**: This mode the DI1 is used as a counting pin.
548
549 [[image:image-20220523182334-9.png]]
550
551 (((
552 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
553 )))
554
555 * RO is for relay. ROx=1 : close，ROx=0 always open.
556 * FIRST: Indicate this is the first packet after join network.
557 * (((
558 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
559 )))
560
561 (((
562 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
563 )))
564
565 (((
566 **To use this mode, please run:**
567 )))
568
569 (% class="box infomessage" %)
570 (((
571 (((
572 **AT+MOD=5**
573 )))
574 )))
575
576 (% class="box infomessage" %)
577 (((
578 (((
579 **ATZ**
580 )))
581 )))
582
583 (((
584 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
585
586
587 )))
588
589 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
590
591 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
592
593 For example, if user has configured below commands:
594
595 * **AT+MOD=1 ** **~-~->** The normal working mode
596 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
597
598 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
599
600 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
601 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.**
602
603 **AT Command to set Trigger Condition**:
604
605 (% style="color:#4f81bd" %)**Trigger base on voltage**:
606
607 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
608
609 **Example:**
610
611 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)
612
613 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
614
615 (% style="color:#4f81bd" %)**Trigger base on current**:
616
617 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
618
619 **Example:**
620
621 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
622
623 (% style="color:#4f81bd" %)**Trigger base on DI status**:
624
625 DI status trigger Flag.
626
627 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
628
629 **Example:**
630
631 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
632
633
634 **Downlink Command to set Trigger Condition**
635
636 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
637
638 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
639
640 AA: Code for this downlink Command:
641
642 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
643
644 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
645
646 yy2 yy2: AC1 or AV1 high limit.
647
648 yy3 yy3: AC2 or AV2 low limit.
649
650 Yy4 yy4: AC2 or AV2 high limit.
651
652 **Example1**: AA 00 13 88 00 00 00 00 00 00
653
654 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
655
656 **Example2**: AA 02 01 00
657
658 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
659
660 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
661
662 MOD6 Payload : total 11 bytes payload
663
664 [[image:image-20220524085923-1.png]]
665
666 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
667
668 [[image:image-20220524090106-2.png]]
669
670 * Each bits shows if the corresponding trigger has been configured.
671
672 **Example:**
673
674 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
675
676
677 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
678
679 [[image:image-20220524090249-3.png]]
680
681 * Each bits shows which status has been trigger on this uplink.
682
683 **Example:**
684
685 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
686
687
688 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
689
690 [[image:image-20220524090456-4.png]]
691
692 * Each bits shows which status has been trigger on this uplink.
693
694 **Example:**
695
696 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
697
698 00000101: Means both DI1 and DI2 trigger are enabled.
699
700
701 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
702
703 Downlink command to poll MOD6 status:
704
705 **AB 06**
706
707 When device got this command, it will send the MOD6 payload.
708
709
710 === 3.3.7 Payload Decoder ===
711
712 (((
713 **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/]]
714
715
716 )))
717
718 == 3.4 ​Configure LT via AT or Downlink ==
719
720 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
721
722 (((
723 There are two kinds of Commands:
724 )))
725
726 * (% 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: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
727
728 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
729
730 === 3.4.1 Common Commands ===
731
732 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]]
733
734
735 === 3.4.2 Sensor related commands ===
736
737 ==== 3.4.2.1 Set Transmit Interval ====
738
739 Set device uplink interval.
740
741 * AT Command:
742
743 (% class="box infomessage" %)
744 (((
745 **AT+TDC=N **
746 )))
747
748 **Example: **AT+TDC=30000. Means set interval to 30 seconds
749
750 * Downlink Payload (prefix 0x01):
751
752 (% class="box infomessage" %)
753 (((
754 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
755 )))
756
757
758 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
759
760 Set work mode.
761
762 * AT Command:
763
764 (% class="box infomessage" %)
765 (((
766 **AT+MOD=N  **
767 )))
768
769 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
770
771 * Downlink Payload (prefix 0x0A):
772
773 (% class="box infomessage" %)
774 (((
775 **0x0A aa     ~/~/ Same as AT+MOD=aa**
776 )))
777
778
779 ==== 3.4.2.3 Poll an uplink ====
780
781 * AT Command:
782
783 There is no AT Command to poll uplink
784
785 * Downlink Payload (prefix 0x08):
786
787 (% class="box infomessage" %)
788 (((
789 **0x08 FF     ~/~/ Poll an uplink,**
790 )))
791
792 **Example**: 0x08FF, ask device to send an Uplink
793
794
795 ==== 3.4.2.4 Enable Trigger Mode ====
796
797 Use of trigger mode, please check [[ADDMOD6>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
798
799 * AT Command:
800
801 (% class="box infomessage" %)
802 (((
803 **AT+ADDMOD6=1 or 0**
804 )))
805
806 1: Enable Trigger Mode
807
808 0: Disable Trigger Mode
809
810 * Downlink Payload (prefix 0x0A 06):
811
812 (% class="box infomessage" %)
813 (((
814 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
815 )))
816
817
818 ==== 3.4.2.5 Poll trigger settings ====
819
820 Poll trigger settings,
821
822 * AT Command:
823
824 There is no AT Command for this feature.
825
826 * Downlink Payload (prefix 0x AB 06):
827
828 (% class="box infomessage" %)
829 (((
830 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
831 )))
832
833
834 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
835
836 Enable Disable DI1/DI2/DI2 as trigger,
837
838 * AT Command:
839
840 (% class="box infomessage" %)
841 (((
842 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
843 )))
844
845 **Example:**
846
847 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
848
849 * Downlink Payload (prefix 0xAA 02):
850
851 (% class="box infomessage" %)
852 (((
853 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
854 )))
855
856
857 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
858
859 Set DI1 or DI3(for LT-33222-L) trigger.
860
861 * AT Command:
862
863 (% class="box infomessage" %)
864 (((
865 **AT+TRIG1=a,b**
866 )))
867
868 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
869
870 b : delay timing.
871
872 **Example:**
873
874 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
875
876 * Downlink Payload (prefix 0x09 01 ):
877
878 (% class="box infomessage" %)
879 (((
880 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
881 )))
882
883
884 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
885
886 Set DI2 trigger.
887
888 * AT Command:
889
890 (% class="box infomessage" %)
891 (((
892 **AT+TRIG2=a,b**
893 )))
894
895 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
896
897 b : delay timing.
898
899 **Example:**
900
901 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
902
903 * Downlink Payload (prefix 0x09 02 ):
904
905 (% class="box infomessage" %)
906 (((
907 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
908 )))
909
910
911 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
912
913 Set current trigger , base on AC port. See [[trigger mode>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
914
915 * AT Command:
916
917 (% class="box infomessage" %)
918 (((
919 **AT+ACLIM. **
920 )))
921
922 * Downlink Payload (prefix 0xAA 01 ):
923
924 (% class="box infomessage" %)
925 (((
926 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
927 )))
928
929
930 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
931
932 Set current trigger , base on AV port. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
933
934 * AT Command:
935
936 (% class="box infomessage" %)
937 (((
938 **AT+AVLIM. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
939 )))
940
941 * Downlink Payload (prefix 0xAA 00 ):
942
943 (% class="box infomessage" %)
944 (((
945 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]] **
946 )))
947
948
949 ==== 3.4.2.11 Trigger – Set minimum interval ====
950
951 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
952
953 * AT Command:
954
955 (% class="box infomessage" %)
956 (((
957 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
958 )))
959
960 * Downlink Payload (prefix 0xAC ):
961
962 (% class="box infomessage" %)
963 (((
964 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
965 )))
966
967
968 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
969
970 * AT Command:
971
972 There is no AT Command to control Digital Output
973
974 * Downlink Payload (prefix 0x02):
975
976 (% class="box infomessage" %)
977 (((
978 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
979 )))
980
981 (((
982 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
983 )))
984
985 (((
986 01: Low,  00: High ,  11: No action
987 )))
988
989 [[image:image-20220524092754-5.png]]
990
991 (((
992 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
993 )))
994
995 (((
996 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
997 )))
998
999
1000 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1001
1002 * AT Command:
1003
1004 There is no AT Command to control Digital Output
1005
1006 * Downlink Payload (prefix 0xA9):
1007
1008 (% class="box infomessage" %)
1009 (((
1010 (((
1011 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1012 )))
1013 )))
1014
1015 This is to control the digital output time of DO pin. Include four bytes:
1016
1017 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1018
1019 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1020
1021 01: DO pins will change back to original state after timeout.
1022
1023 00: DO pins will change to an inverter state after timeout 
1024
1025 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1026
1027 [[image:image-20220524093238-6.png]]
1028
1029 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1030
1031 [[image:image-20220524093328-7.png]]
1032
1033 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1034
1035 [[image:image-20220524093351-8.png]]
1036
1037 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1038
1039 Latching time. Unit: ms
1040
1041 Device will upload a packet if downlink code executes successfully.
1042
1043 **Example payload:**
1044
1045 **~1. A9 01 01 01 01 07 D0**
1046
1047 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1048
1049 **2. A9 01 00 01 11 07 D0**
1050
1051 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1052
1053 **3. A9 00 00 00 00 07 D0**
1054
1055 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1056
1057 **4. A9 00 11 01 00 07 D0**
1058
1059 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
1060
1061
1062 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1063
1064 * AT Command:
1065
1066 There is no AT Command to control Relay Output
1067
1068 * Downlink Payload (prefix 0x03):
1069
1070 (% class="box infomessage" %)
1071 (((
1072 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1073 )))
1074
1075 (((
1076 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1077 )))
1078
1079 (((
1080 01: Close ,  00: Open , 11: No action
1081 )))
1082
1083 (((
1084 [[image:image-20220524093724-9.png]]
1085 )))
1086
1087 Device will upload a packet if downlink code executes successfully.
1088
1089
1090 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1091
1092 * AT Command:
1093
1094 There is no AT Command to control Relay Output
1095
1096 * Downlink Payload (prefix 0x05):
1097
1098 (% class="box infomessage" %)
1099 (((
1100 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1101 )))
1102
1103 This is to control the relay output time of relay. Include four bytes:
1104
1105 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1106
1107 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1108
1109 01: Relays will change back to original state after timeout.
1110
1111 00: Relays will change to an inverter state after timeout
1112
1113 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1114
1115 [[image:image-20220524093831-10.png]]
1116
1117 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1118
1119 Device will upload a packet if downlink code executes successfully.
1120
1121 **Example payload:**
1122
1123 **~1. 05 01 11 07 D0**
1124
1125 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1126
1127 **2. 05 01 10 07 D0**
1128
1129 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1130
1131 **3. 05 00 01 07 D0**
1132
1133 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1134
1135 **4. 05 00 00 07 D0**
1136
1137 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1138
1139
1140 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1141
1142 When voltage exceed the threshold, count. Feature see [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]
1143
1144 * AT Command:
1145
1146 (% class="box infomessage" %)
1147 (((
1148 **AT+VOLMAX    ~/~/ See [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]**
1149 )))
1150
1151 * Downlink Payload (prefix 0xA5):
1152
1153 (% class="box infomessage" %)
1154 (((
1155 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1156 )))
1157
1158
1159 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1160
1161 * AT Command:
1162
1163 (% class="box infomessage" %)
1164 (((
1165 **AT+SETCNT=aa,(bb cc dd ee) **
1166 )))
1167
1168 aa: 1: Set count1,
1169
1170 2: Set count2,
1171
1172 3: Set AV1 count
1173
1174 Bb cc dd ee: number to be set
1175
1176 * Downlink Payload (prefix 0xA8):
1177
1178 (% class="box infomessage" %)
1179 (((
1180 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1181 )))
1182
1183
1184 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1185
1186 Clear counting for counting mode
1187
1188 * AT Command:
1189
1190 (% class="box infomessage" %)
1191 (((
1192 **AT+CLRCOUNT ~/~/ clear all counting**
1193 )))
1194
1195 * Downlink Payload (prefix 0xA6):
1196
1197 (% class="box infomessage" %)
1198 (((
1199 **0x A6 01     ~/~/ clear all counting,**
1200 )))
1201
1202
1203 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1204
1205 * AT Command:
1206
1207 (% class="box infomessage" %)
1208 (((
1209 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1210 )))
1211
1212 * Downlink Payload (prefix 0xA7):
1213
1214 (% class="box infomessage" %)
1215 (((
1216 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1217 )))
1218
1219 (((
1220 range: aa bb cc:0 to 16777215,  (unit:second)
1221
1222
1223 )))
1224
1225 == 3.5 Integrate with Mydevice ==
1226
1227 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:
1228
1229 (((
1230 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1231 )))
1232
1233 (((
1234 **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:
1235 )))
1236
1237 [[image:1653356737703-362.png||height="232" width="732"]]
1238
1239 [[image:image-20220524094641-11.png||height="390" width="723"]]
1240
1241 [[image:image-20220524094641-12.png||height="402" width="718"]]
1242
1243 **Step 3**: Create an account or log in Mydevices.
1244
1245 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1246
1247 Search under The things network
1248
1249 [[image:1653356838789-523.png||height="337" width="740"]]
1250
1251
1252 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1253
1254 [[image:image-20220524094909-1.png||height="335" width="729"]]
1255
1256 [[image:image-20220524094909-2.png||height="337" width="729"]]
1257
1258 [[image:image-20220524094909-3.png||height="338" width="727"]]
1259
1260 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1261
1262 [[image:image-20220524094909-5.png||height="341" width="734"]]
1263
1264
1265 == 3.6 Interface Detail ==
1266
1267 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1268
1269 Support NPN Type sensor
1270
1271 [[image:1653356991268-289.png]]
1272
1273
1274 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1275
1276 (((
1277 The DI port of LT-22222-L can support NPN or PNP output sensor.
1278 )))
1279
1280 (((
1281 (((
1282 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
1283 )))
1284 )))
1285
1286 [[image:1653357170703-587.png]]
1287
1288 (((
1289 (((
1290 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1291 )))
1292 )))
1293
1294 (((
1295
1296 )))
1297
1298 (((
1299 **Example1**: Connect to a Low active sensor.
1300 )))
1301
1302 (((
1303 This type of sensor will output a low signal GND when active.
1304 )))
1305
1306 * (((
1307 Connect sensor’s output to DI1-
1308 )))
1309 * (((
1310 Connect sensor’s VCC to DI1+.
1311 )))
1312
1313 (((
1314 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1315 )))
1316
1317 (((
1318 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1319 )))
1320
1321 (((
1322 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.
1323 )))
1324
1325 (((
1326
1327 )))
1328
1329 (((
1330 **Example2**: Connect to a High active sensor.
1331 )))
1332
1333 (((
1334 This type of sensor will output a high signal (example 24v) when active.
1335 )))
1336
1337 * (((
1338 Connect sensor’s output to DI1+
1339 )))
1340 * (((
1341 Connect sensor’s GND DI1-.
1342 )))
1343
1344 (((
1345 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1346 )))
1347
1348 (((
1349 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1350 )))
1351
1352 (((
1353 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.
1354 )))
1355
1356 (((
1357
1358 )))
1359
1360 (((
1361 **Example3**: Connect to a 220v high active sensor.
1362 )))
1363
1364 (((
1365 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1366 )))
1367
1368 * (((
1369 Connect sensor’s output to DI1+ with a serial 50K resistor
1370 )))
1371 * (((
1372 Connect sensor’s GND DI1-.
1373 )))
1374
1375 (((
1376 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1377 )))
1378
1379 (((
1380 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1381 )))
1382
1383 (((
1384 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.
1385 )))
1386
1387
1388 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1389
1390 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1391
1392 [[image:1653357531600-905.png]]
1393
1394
1395 === 3.6.4 Analog Input Interface ===
1396
1397 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:
1398
1399 **AC2 = (IN2 voltage )/12**
1400
1401 [[image:1653357592296-182.png]]
1402
1403 Example to connect a 4~~20mA sensor
1404
1405 We take the wind speed sensor as an example for reference only.
1406
1407 Specifications of the wind speed sensor:
1408
1409 Red:12~~24v
1410
1411 Yellow:4~~20mA
1412
1413 Black:GND
1414
1415
1416 Connection diagram:
1417
1418 [[image:1653357640609-758.png]]
1419
1420 [[image:1653357648330-671.png||height="155" width="733"]]
1421
1422
1423 === 3.6.5 Relay Output ===
1424
1425 (((
1426 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:
1427 )))
1428
1429 [[image:image-20220524100215-9.png]]
1430
1431 [[image:image-20220524100215-10.png||height="382" width="723"]]
1432
1433
1434 == 3.7 LEDs Indicators ==
1435
1436 [[image:image-20220524100748-11.png]]
1437
1438
1439 = 4. Use AT Command =
1440
1441 == 4.1 Access AT Command ==
1442
1443 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.
1444
1445 [[image:1653358238933-385.png]]
1446
1447 (((
1448 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:
1449 )))
1450
1451 [[image:1653358355238-883.png]]
1452
1453 (((
1454 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/]]
1455 )))
1456
1457 (((
1458 AT+<CMD>?        : Help on <CMD>
1459 )))
1460
1461 (((
1462 AT+<CMD>         : Run <CMD>
1463 )))
1464
1465 (((
1466 AT+<CMD>=<value> : Set the value
1467 )))
1468
1469 (((
1470 AT+<CMD>=?       : Get the value
1471 )))
1472
1473 (((
1474 ATZ: Trig a reset of the MCU
1475 )))
1476
1477 (((
1478 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1479 )))
1480
1481 (((
1482 AT+DEUI: Get or Set the Device EUI
1483 )))
1484
1485 (((
1486 AT+DADDR: Get or Set the Device Address
1487 )))
1488
1489 (((
1490 AT+APPKEY: Get or Set the Application Key
1491 )))
1492
1493 (((
1494 AT+NWKSKEY: Get or Set the Network Session Key
1495 )))
1496
1497 (((
1498 AT+APPSKEY: Get or Set the Application Session Key
1499 )))
1500
1501 (((
1502 AT+APPEUI: Get or Set the Application EUI
1503 )))
1504
1505 (((
1506 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1507 )))
1508
1509 (((
1510 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1511 )))
1512
1513 (((
1514 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1515 )))
1516
1517 (((
1518 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1519 )))
1520
1521 (((
1522 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1523 )))
1524
1525 (((
1526 AT+RX2FQ: Get or Set the Rx2 window frequency
1527 )))
1528
1529 (((
1530 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1531 )))
1532
1533 (((
1534 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1535 )))
1536
1537 (((
1538 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1539 )))
1540
1541 (((
1542 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1543 )))
1544
1545 (((
1546 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1547 )))
1548
1549 (((
1550 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1551 )))
1552
1553 (((
1554 AT+NWKID: Get or Set the Network ID
1555 )))
1556
1557 (((
1558 AT+FCU: Get or Set the Frame Counter Uplink
1559 )))
1560
1561 (((
1562 AT+FCD: Get or Set the Frame Counter Downlink
1563 )))
1564
1565 (((
1566 AT+CLASS: Get or Set the Device Class
1567 )))
1568
1569 (((
1570 AT+JOIN: Join network
1571 )))
1572
1573 (((
1574 AT+NJS: Get OTAA Join Status
1575 )))
1576
1577 (((
1578 AT+SENDB: Send hexadecimal data along with the application port
1579 )))
1580
1581 (((
1582 AT+SEND: Send text data along with the application port
1583 )))
1584
1585 (((
1586 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1587 )))
1588
1589 (((
1590 AT+RECV: Print last received data in raw format
1591 )))
1592
1593 (((
1594 AT+VER: Get current image version and Frequency Band
1595 )))
1596
1597 (((
1598 AT+CFM: Get or Set the confirmation mode (0-1)
1599 )))
1600
1601 (((
1602 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1603 )))
1604
1605 (((
1606 AT+SNR: Get the SNR of the last received packet
1607 )))
1608
1609 (((
1610 AT+RSSI: Get the RSSI of the last received packet
1611 )))
1612
1613 (((
1614 AT+TDC: Get or set the application data transmission interval in ms
1615 )))
1616
1617 (((
1618 AT+PORT: Get or set the application port
1619 )))
1620
1621 (((
1622 AT+DISAT: Disable AT commands
1623 )))
1624
1625 (((
1626 AT+PWORD: Set password, max 9 digits
1627 )))
1628
1629 (((
1630 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1631 )))
1632
1633 (((
1634 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1635 )))
1636
1637 (((
1638 AT+CFG: Print all settings
1639
1640
1641 )))
1642
1643 == 4.2 Common AT Command Sequence ==
1644
1645 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1646
1647 (((
1648 If device has not joined network yet:
1649 )))
1650
1651 (((
1652 (% style="background-color:#dcdcdc" %)123456
1653 )))
1654
1655 (((
1656 (% style="background-color:#dcdcdc" %)AT+FDR
1657 )))
1658
1659 (((
1660 (% style="background-color:#dcdcdc" %)123456
1661 )))
1662
1663 (((
1664 (% style="background-color:#dcdcdc" %)AT+NJM=0
1665 )))
1666
1667 (((
1668 (% style="background-color:#dcdcdc" %)ATZ
1669 )))
1670
1671
1672 (((
1673 If device already joined network:
1674 )))
1675
1676 (((
1677 (% style="background-color:#dcdcdc" %)AT+NJM=0
1678 )))
1679
1680 (((
1681 (% style="background-color:#dcdcdc" %)ATZ
1682
1683
1684 )))
1685
1686 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1687
1688 (((
1689 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1690 )))
1691
1692 (((
1693 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1694 )))
1695
1696 (((
1697 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1698 )))
1699
1700 (((
1701 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1702 )))
1703
1704 (((
1705 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1706 )))
1707
1708 (((
1709 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1710 )))
1711
1712 (((
1713 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1714 )))
1715
1716 (((
1717 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1718 )))
1719
1720 (((
1721 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1722 )))
1723
1724 (((
1725 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1726 )))
1727
1728 (((
1729 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1730 )))
1731
1732 (((
1733 (% 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.
1734 )))
1735
1736 (((
1737 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1738 )))
1739
1740 (((
1741 (% style="color:red" %)**Note:**
1742 )))
1743
1744 (((
1745 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1746 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1747 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.
1748 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
1749 )))
1750
1751 (((
1752 [[image:1653359097980-169.png||height="188" width="729"]]
1753 )))
1754
1755 (((
1756
1757 )))
1758
1759 === 4.2.3 Change to Class A ===
1760
1761 If sensor JOINED
1762 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1763 ATZ
1764
1765
1766 = 5. FAQ =
1767
1768 == 5.1 How to upgrade the image? ==
1769
1770 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1771
1772 * Support new features
1773 * For bug fix
1774 * Change LoRaWAN bands.
1775 Below shows the hardware connection for how to upload an image to the LT:
1776 * [[image:1653359603330-121.png]]
1777
1778 (((
1779 **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]].
1780 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1781 **Step3: **Open flashloader; choose the correct COM port to update.
1782 **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 (% 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:
1793
1794 [[image:1653360054704-518.png||height="186" width="745"]]
1795
1796
1797 (((
1798 (((
1799 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1800 )))
1801 )))
1802
1803 (((
1804 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1805
1806
1807 )))
1808
1809 (((
1810 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1811 )))
1812
1813 (((
1814 (((
1815 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1816 )))
1817 )))
1818
1819 (((
1820 (((
1821 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1822 )))
1823 )))
1824
1825 (((
1826 (% 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.
1827 )))
1828
1829 (((
1830 [[image:1653360231087-571.png||height="401" width="727"]]
1831 )))
1832
1833 (((
1834 (% 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.
1835 )))
1836
1837 (((
1838 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1839 )))
1840
1841 (((
1842 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1843 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1844 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1845 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1846 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1847 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1848 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1849 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1850 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1851 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1852 )))
1853
1854 (((
1855 As shown in below:
1856 )))
1857
1858 [[image:1653360498588-932.png||height="485" width="726"]]
1859
1860
1861 == 5.4 Can I see counting event in Serial? ==
1862
1863 (((
1864 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.
1865
1866
1867 )))
1868
1869 (((
1870 = 6. Trouble Shooting =
1871 )))
1872
1873 (((
1874 (((
1875 == 6.1 Downlink doesn’t work, how to solve it? ==
1876 )))
1877 )))
1878
1879 (((
1880 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1881
1882
1883 )))
1884
1885 (((
1886 == 6.2 Have trouble to upload image. ==
1887 )))
1888
1889 (((
1890 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1891 )))
1892
1893 (((
1894
1895 )))
1896
1897 (((
1898 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1899 )))
1900
1901 (((
1902 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1903 )))
1904
1905 (((
1906
1907 )))
1908
1909 (((
1910 = 7. Order Info =
1911 )))
1912
1913 (((
1914 (((
1915 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1916 )))
1917 )))
1918
1919 (((
1920 (((
1921 (% style="color:#4f81bd" %)**XXX:**
1922 )))
1923 )))
1924
1925 (((
1926 * (((
1927 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1928 )))
1929 )))
1930
1931 (((
1932 * (((
1933 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1934 )))
1935 )))
1936
1937 (((
1938 * (((
1939 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1940 )))
1941 )))
1942
1943 (((
1944 * (((
1945 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1946 )))
1947 )))
1948
1949 (((
1950 * (((
1951 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1952 )))
1953 )))
1954
1955 (((
1956 * (((
1957 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1958 )))
1959 )))
1960
1961 (((
1962 * (((
1963 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1964 )))
1965 )))
1966
1967 (((
1968 * (((
1969 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1970 )))
1971 )))
1972
1973 (((
1974 * (((
1975 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1976
1977
1978 )))
1979
1980 = 8. Packing Info =
1981 )))
1982
1983 (((
1984 (((
1985 **Package Includes**:
1986 )))
1987 )))
1988
1989 (((
1990 (((
1991 * LT-22222-L I/O Controller x 1
1992 * Stick Antenna for LoRa RF part x 1
1993 * Bracket for controller x1
1994 * Program cable x 1
1995 )))
1996 )))
1997
1998 (((
1999 (((
2000 **Dimension and weight**:
2001 )))
2002 )))
2003
2004 (((
2005 (((
2006 * Device Size: 13.5 x 7 x 3 cm
2007 * Device Weight: 105g
2008 * Package Size / pcs : 14.5 x 8 x 5 cm
2009 * Weight / pcs : 170g
2010
2011
2012 )))
2013 )))
2014
2015 (((
2016 = 9. Support =
2017 )))
2018
2019 * (((
2020 (((
2021 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.
2022 )))
2023 )))
2024 * (((
2025 (((
2026 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
2027 )))
2028 )))
2029
2030 (((
2031 (((
2032 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2033
2034
2035 )))
2036
2037 (((
2038 = 10. Reference​​​​​ =
2039
2040 * Product Page:
2041
2042 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]]
2043
2044 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2045 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2046 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2047 )))
2048 )))