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Version 75.11 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
328
329 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
330
331 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
332
333 (((
334 Total : 11 bytes payload
335 )))
336
337 [[image:image-20220523180452-3.png]]
338
339 (((
340 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
341 )))
342
343 [[image:image-20220523180506-4.png]]
344
345 * RO is for relay. ROx=1 : close，ROx=0 always open.
346 * FIRST: Indicate this is the first packet after join network.
347 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
348
349 (((
350 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
351 )))
352
353 (((
354 **To use counting mode, please run:**
355 )))
356
357 (% class="box infomessage" %)
358 (((
359 (((
360 **AT+MOD=2**
361 )))
362 )))
363
364 (% class="box infomessage" %)
365 (((
366 (((
367 **ATZ**
368 )))
369 )))
370
371 (((
372 (% style="color:#4f81bd" %)**AT Commands for counting:**
373 )))
374
375 (((
376 **For LT22222-L:**
377 )))
378
379 (% class="box infomessage" %)
380 (((
381 (((
382 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
383 )))
384 )))
385
386 (% class="box infomessage" %)
387 (((
388 (((
389 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
390 )))
391 )))
392
393 (% class="box infomessage" %)
394 (((
395 (((
396 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
397 )))
398 )))
399
400 (% class="box infomessage" %)
401 (((
402 (((
403 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
404 )))
405 )))
406
407 (% class="box infomessage" %)
408 (((
409 (((
410 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
411 )))
412 )))
413
414 (% class="box infomessage" %)
415 (((
416 (((
417 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
418 )))
419 )))
420
421
422 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
423
424 **LT22222-L**: This mode the DI1 is used as a counting pin.
425
426 [[image:image-20220523181246-5.png]]
427
428 (((
429 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
430 )))
431
432 [[image:image-20220523181301-6.png]]
433
434 * RO is for relay. ROx=1 : close，ROx=0 always open.
435 * FIRST: Indicate this is the first packet after join network.
436 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
437
438 (((
439 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
440 )))
441
442 (((
443 **To use counting mode, please run:**
444 )))
445
446 (% class="box infomessage" %)
447 (((
448 (((
449 **AT+MOD=3**
450 )))
451 )))
452
453 (% class="box infomessage" %)
454 (((
455 (((
456 **ATZ**
457 )))
458 )))
459
460 (((
461 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
462
463
464 )))
465
466 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
467
468 **LT22222-L**: This mode the DI1 is used as a counting pin.
469
470 The AVI1 is also used for counting. AVI1 is used to monitor the voltage. It will check the voltage **every 60s**, if voltage is higher or lower than VOLMAX mV, the AVI1 Counting increase 1, so AVI1 counting can be used to measure a machine working hour.
471
472 [[image:image-20220523181903-8.png]]
473
474 (((
475 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
476 )))
477
478 [[image:image-20220523181727-7.png]]
479
480 * RO is for relay. ROx=1 : close，ROx=0 always open.
481 * FIRST: Indicate this is the first packet after join network.
482 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
483
484 (((
485 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
486 )))
487
488 (((
489 **To use this mode, please run:**
490 )))
491
492 (% class="box infomessage" %)
493 (((
494 (((
495 **AT+MOD=4**
496 )))
497 )))
498
499 (% class="box infomessage" %)
500 (((
501 (((
502 **ATZ**
503 )))
504 )))
505
506 (((
507
508 )))
509
510 (((
511 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
512 )))
513
514 (((
515 **Plus below command for AVI1 Counting:**
516 )))
517
518 (% class="box infomessage" %)
519 (((
520 (((
521 **AT+SETCNT=3,60   (set AVI Count to 60)**
522 )))
523 )))
524
525 (% class="box infomessage" %)
526 (((
527 (((
528 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
529 )))
530 )))
531
532 (% class="box infomessage" %)
533 (((
534 (((
535 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
536 )))
537 )))
538
539 (% class="box infomessage" %)
540 (((
541 (((
542 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
543 )))
544 )))
545
546
547 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
548
549 **LT22222-L**: This mode the DI1 is used as a counting pin.
550
551 [[image:image-20220523182334-9.png]]
552
553 (((
554 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
555 )))
556
557 * RO is for relay. ROx=1 : close，ROx=0 always open.
558 * FIRST: Indicate this is the first packet after join network.
559 * (((
560 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
561 )))
562
563 (((
564 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
565 )))
566
567 (((
568 **To use this mode, please run:**
569 )))
570
571 (% class="box infomessage" %)
572 (((
573 (((
574 **AT+MOD=5**
575 )))
576 )))
577
578 (% class="box infomessage" %)
579 (((
580 (((
581 **ATZ**
582 )))
583 )))
584
585 (((
586 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
587
588
589 )))
590
591 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
592
593 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
594
595 For example, if user has configured below commands:
596
597 * **AT+MOD=1 ** **~-~->** The normal working mode
598 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
599
600 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
601
602 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
603 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.**
604
605 **AT Command to set Trigger Condition**:
606
607 (% style="color:#4f81bd" %)**Trigger base on voltage**:
608
609 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
610
611 **Example:**
612
613 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)
614
615 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
616
617 (% style="color:#4f81bd" %)**Trigger base on current**:
618
619 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
620
621 **Example:**
622
623 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
624
625 (% style="color:#4f81bd" %)**Trigger base on DI status**:
626
627 DI status trigger Flag.
628
629 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
630
631 **Example:**
632
633 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
634
635
636 **Downlink Command to set Trigger Condition**
637
638 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
639
640 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
641
642 AA: Code for this downlink Command:
643
644 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
645
646 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
647
648 yy2 yy2: AC1 or AV1 high limit.
649
650 yy3 yy3: AC2 or AV2 low limit.
651
652 Yy4 yy4: AC2 or AV2 high limit.
653
654 **Example1**: AA 00 13 88 00 00 00 00 00 00
655
656 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
657
658 **Example2**: AA 02 01 00
659
660 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
661
662 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
663
664 MOD6 Payload : total 11 bytes payload
665
666 [[image:image-20220524085923-1.png]]
667
668 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
669
670 [[image:image-20220524090106-2.png]]
671
672 * Each bits shows if the corresponding trigger has been configured.
673
674 **Example:**
675
676 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
677
678
679 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
680
681 [[image:image-20220524090249-3.png]]
682
683 * Each bits shows which status has been trigger on this uplink.
684
685 **Example:**
686
687 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
688
689
690 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
691
692 [[image:image-20220524090456-4.png]]
693
694 * Each bits shows which status has been trigger on this uplink.
695
696 **Example:**
697
698 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
699
700 00000101: Means both DI1 and DI2 trigger are enabled.
701
702
703 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
704
705 Downlink command to poll MOD6 status:
706
707 **AB 06**
708
709 When device got this command, it will send the MOD6 payload.
710
711
712 === 3.3.7 Payload Decoder ===
713
714 (((
715 **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/]]
716
717
718 )))
719
720 == 3.4 ​Configure LT via AT or Downlink ==
721
722 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
723
724 (((
725 There are two kinds of Commands:
726 )))
727
728 * (% 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
729
730 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
731
732 === 3.4.1 Common Commands ===
733
734 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]]
735
736
737 === 3.4.2 Sensor related commands ===
738
739 ==== 3.4.2.1 Set Transmit Interval ====
740
741 Set device uplink interval.
742
743 * AT Command:
744
745 (% class="box infomessage" %)
746 (((
747 **AT+TDC=N **
748 )))
749
750 **Example: **AT+TDC=30000. Means set interval to 30 seconds
751
752 * Downlink Payload (prefix 0x01):
753
754 (% class="box infomessage" %)
755 (((
756 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
757 )))
758
759
760 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
761
762 Set work mode.
763
764 * AT Command:
765
766 (% class="box infomessage" %)
767 (((
768 **AT+MOD=N  **
769 )))
770
771 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
772
773 * Downlink Payload (prefix 0x0A):
774
775 (% class="box infomessage" %)
776 (((
777 **0x0A aa     ~/~/ Same as AT+MOD=aa**
778 )))
779
780
781 ==== 3.4.2.3 Poll an uplink ====
782
783 * AT Command:
784
785 There is no AT Command to poll uplink
786
787 * Downlink Payload (prefix 0x08):
788
789 (% class="box infomessage" %)
790 (((
791 **0x08 FF     ~/~/ Poll an uplink,**
792 )))
793
794 **Example**: 0x08FF, ask device to send an Uplink
795
796
797 ==== 3.4.2.4 Enable Trigger Mode ====
798
799 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]]
800
801 * AT Command:
802
803 (% class="box infomessage" %)
804 (((
805 **AT+ADDMOD6=1 or 0**
806 )))
807
808 1: Enable Trigger Mode
809
810 0: Disable Trigger Mode
811
812 * Downlink Payload (prefix 0x0A 06):
813
814 (% class="box infomessage" %)
815 (((
816 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
817 )))
818
819
820 ==== 3.4.2.5 Poll trigger settings ====
821
822 Poll trigger settings,
823
824 * AT Command:
825
826 There is no AT Command for this feature.
827
828 * Downlink Payload (prefix 0x AB 06):
829
830 (% class="box infomessage" %)
831 (((
832 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
833 )))
834
835
836 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
837
838 Enable Disable DI1/DI2/DI2 as trigger,
839
840 * AT Command:
841
842 (% class="box infomessage" %)
843 (((
844 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
845 )))
846
847 **Example:**
848
849 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
850
851 * Downlink Payload (prefix 0xAA 02):
852
853 (% class="box infomessage" %)
854 (((
855 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
856 )))
857
858
859 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
860
861 Set DI1 or DI3(for LT-33222-L) trigger.
862
863 * AT Command:
864
865 (% class="box infomessage" %)
866 (((
867 **AT+TRIG1=a,b**
868 )))
869
870 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
871
872 b : delay timing.
873
874 **Example:**
875
876 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
877
878 * Downlink Payload (prefix 0x09 01 ):
879
880 (% class="box infomessage" %)
881 (((
882 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
883 )))
884
885
886 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
887
888 Set DI2 trigger.
889
890 * AT Command:
891
892 (% class="box infomessage" %)
893 (((
894 **AT+TRIG2=a,b**
895 )))
896
897 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
898
899 b : delay timing.
900
901 **Example:**
902
903 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
904
905 * Downlink Payload (prefix 0x09 02 ):
906
907 (% class="box infomessage" %)
908 (((
909 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
910 )))
911
912
913 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
914
915 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]]
916
917 * AT Command:
918
919 (% class="box infomessage" %)
920 (((
921 **AT+ACLIM. **
922 )))
923
924 * Downlink Payload (prefix 0xAA 01 ):
925
926 (% class="box infomessage" %)
927 (((
928 **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]]**
929 )))
930
931
932 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
933
934 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]]
935
936 * AT Command:
937
938 (% class="box infomessage" %)
939 (((
940 **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]]**
941 )))
942
943 * Downlink Payload (prefix 0xAA 00 ):
944
945 (% class="box infomessage" %)
946 (((
947 **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]] **
948 )))
949
950
951 ==== 3.4.2.11 Trigger – Set minimum interval ====
952
953 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
954
955 * AT Command:
956
957 (% class="box infomessage" %)
958 (((
959 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
960 )))
961
962 * Downlink Payload (prefix 0xAC ):
963
964 (% class="box infomessage" %)
965 (((
966 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
967 )))
968
969
970 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
971
972 * AT Command:
973
974 There is no AT Command to control Digital Output
975
976 * Downlink Payload (prefix 0x02):
977
978 (% class="box infomessage" %)
979 (((
980 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
981 )))
982
983 (((
984 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
985 )))
986
987 (((
988 01: Low,  00: High ,  11: No action
989 )))
990
991 [[image:image-20220524092754-5.png]]
992
993 (((
994 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
995 )))
996
997 (((
998 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
999 )))
1000
1001
1002 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1003
1004 * AT Command:
1005
1006 There is no AT Command to control Digital Output
1007
1008 * Downlink Payload (prefix 0xA9):
1009
1010 (% class="box infomessage" %)
1011 (((
1012 (((
1013 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1014 )))
1015 )))
1016
1017 This is to control the digital output time of DO pin. Include four bytes:
1018
1019 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1020
1021 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1022
1023 01: DO pins will change back to original state after timeout.
1024
1025 00: DO pins will change to an inverter state after timeout 
1026
1027 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1028
1029 [[image:image-20220524093238-6.png]]
1030
1031 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1032
1033 [[image:image-20220524093328-7.png]]
1034
1035 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1036
1037 [[image:image-20220524093351-8.png]]
1038
1039 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1040
1041 Latching time. Unit: ms
1042
1043 Device will upload a packet if downlink code executes successfully.
1044
1045 **Example payload:**
1046
1047 **~1. A9 01 01 01 01 07 D0**
1048
1049 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1050
1051 **2. A9 01 00 01 11 07 D0**
1052
1053 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1054
1055 **3. A9 00 00 00 00 07 D0**
1056
1057 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1058
1059 **4. A9 00 11 01 00 07 D0**
1060
1061 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
1062
1063
1064 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1065
1066 * AT Command:
1067
1068 There is no AT Command to control Relay Output
1069
1070 * Downlink Payload (prefix 0x03):
1071
1072 (% class="box infomessage" %)
1073 (((
1074 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1075 )))
1076
1077 (((
1078 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1079 )))
1080
1081 (((
1082 01: Close ,  00: Open , 11: No action
1083 )))
1084
1085 (((
1086 [[image:image-20220524093724-9.png]]
1087 )))
1088
1089 Device will upload a packet if downlink code executes successfully.
1090
1091
1092 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1093
1094 * AT Command:
1095
1096 There is no AT Command to control Relay Output
1097
1098 * Downlink Payload (prefix 0x05):
1099
1100 (% class="box infomessage" %)
1101 (((
1102 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1103 )))
1104
1105 This is to control the relay output time of relay. Include four bytes:
1106
1107 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1108
1109 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1110
1111 01: Relays will change back to original state after timeout.
1112
1113 00: Relays will change to an inverter state after timeout
1114
1115 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1116
1117 [[image:image-20220524093831-10.png]]
1118
1119 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1120
1121 Device will upload a packet if downlink code executes successfully.
1122
1123 **Example payload:**
1124
1125 **~1. 05 01 11 07 D0**
1126
1127 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1128
1129 **2. 05 01 10 07 D0**
1130
1131 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1132
1133 **3. 05 00 01 07 D0**
1134
1135 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1136
1137 **4. 05 00 00 07 D0**
1138
1139 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1140
1141
1142 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1143
1144 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]]
1145
1146 * AT Command:
1147
1148 (% class="box infomessage" %)
1149 (((
1150 **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]]**
1151 )))
1152
1153 * Downlink Payload (prefix 0xA5):
1154
1155 (% class="box infomessage" %)
1156 (((
1157 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1158 )))
1159
1160
1161 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1162
1163 * AT Command:
1164
1165 (% class="box infomessage" %)
1166 (((
1167 **AT+SETCNT=aa,(bb cc dd ee) **
1168 )))
1169
1170 aa: 1: Set count1,
1171
1172 2: Set count2,
1173
1174 3: Set AV1 count
1175
1176 Bb cc dd ee: number to be set
1177
1178 * Downlink Payload (prefix 0xA8):
1179
1180 (% class="box infomessage" %)
1181 (((
1182 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1183 )))
1184
1185
1186 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1187
1188 Clear counting for counting mode
1189
1190 * AT Command:
1191
1192 (% class="box infomessage" %)
1193 (((
1194 **AT+CLRCOUNT ~/~/ clear all counting**
1195 )))
1196
1197 * Downlink Payload (prefix 0xA6):
1198
1199 (% class="box infomessage" %)
1200 (((
1201 **0x A6 01     ~/~/ clear all counting,**
1202 )))
1203
1204
1205 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1206
1207 * AT Command:
1208
1209 (% class="box infomessage" %)
1210 (((
1211 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1212 )))
1213
1214 * Downlink Payload (prefix 0xA7):
1215
1216 (% class="box infomessage" %)
1217 (((
1218 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1219 )))
1220
1221 (((
1222 range: aa bb cc:0 to 16777215,  (unit:second)
1223
1224
1225 )))
1226
1227 == 3.5 Integrate with Mydevice ==
1228
1229 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:
1230
1231 (((
1232 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1233 )))
1234
1235 (((
1236 **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:
1237 )))
1238
1239 [[image:1653356737703-362.png||height="232" width="732"]]
1240
1241 [[image:image-20220524094641-11.png||height="390" width="723"]]
1242
1243 [[image:image-20220524094641-12.png||height="402" width="718"]]
1244
1245 **Step 3**: Create an account or log in Mydevices.
1246
1247 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1248
1249 Search under The things network
1250
1251 [[image:1653356838789-523.png||height="337" width="740"]]
1252
1253
1254 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1255
1256 [[image:image-20220524094909-1.png||height="335" width="729"]]
1257
1258 [[image:image-20220524094909-2.png||height="337" width="729"]]
1259
1260 [[image:image-20220524094909-3.png||height="338" width="727"]]
1261
1262 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1263
1264 [[image:image-20220524094909-5.png||height="341" width="734"]]
1265
1266
1267 == 3.6 Interface Detail ==
1268
1269 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1270
1271 Support NPN Type sensor
1272
1273 [[image:1653356991268-289.png]]
1274
1275
1276 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1277
1278 (((
1279 The DI port of LT-22222-L can support NPN or PNP output sensor.
1280 )))
1281
1282 (((
1283 (((
1284 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
1285 )))
1286 )))
1287
1288 [[image:1653357170703-587.png]]
1289
1290 (((
1291 (((
1292 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1293 )))
1294 )))
1295
1296 (((
1297
1298 )))
1299
1300 (((
1301 **Example1**: Connect to a Low active sensor.
1302 )))
1303
1304 (((
1305 This type of sensor will output a low signal GND when active.
1306 )))
1307
1308 * (((
1309 Connect sensor’s output to DI1-
1310 )))
1311 * (((
1312 Connect sensor’s VCC to DI1+.
1313 )))
1314
1315 (((
1316 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1317 )))
1318
1319 (((
1320 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1321 )))
1322
1323 (((
1324 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.
1325 )))
1326
1327 (((
1328
1329 )))
1330
1331 (((
1332 **Example2**: Connect to a High active sensor.
1333 )))
1334
1335 (((
1336 This type of sensor will output a high signal (example 24v) when active.
1337 )))
1338
1339 * (((
1340 Connect sensor’s output to DI1+
1341 )))
1342 * (((
1343 Connect sensor’s GND DI1-.
1344 )))
1345
1346 (((
1347 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1348 )))
1349
1350 (((
1351 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1352 )))
1353
1354 (((
1355 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.
1356 )))
1357
1358 (((
1359
1360 )))
1361
1362 (((
1363 **Example3**: Connect to a 220v high active sensor.
1364 )))
1365
1366 (((
1367 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1368 )))
1369
1370 * (((
1371 Connect sensor’s output to DI1+ with a serial 50K resistor
1372 )))
1373 * (((
1374 Connect sensor’s GND DI1-.
1375 )))
1376
1377 (((
1378 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1379 )))
1380
1381 (((
1382 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1383 )))
1384
1385 (((
1386 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.
1387 )))
1388
1389
1390 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1391
1392 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1393
1394 [[image:1653357531600-905.png]]
1395
1396
1397 === 3.6.4 Analog Input Interface ===
1398
1399 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:
1400
1401 **AC2 = (IN2 voltage )/12**
1402
1403 [[image:1653357592296-182.png]]
1404
1405 Example to connect a 4~~20mA sensor
1406
1407 We take the wind speed sensor as an example for reference only.
1408
1409 Specifications of the wind speed sensor:
1410
1411 Red:12~~24v
1412
1413 Yellow:4~~20mA
1414
1415 Black:GND
1416
1417
1418 Connection diagram:
1419
1420 [[image:1653357640609-758.png]]
1421
1422 [[image:1653357648330-671.png||height="155" width="733"]]
1423
1424
1425 === 3.6.5 Relay Output ===
1426
1427 (((
1428 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:
1429 )))
1430
1431 [[image:image-20220524100215-9.png]]
1432
1433 [[image:image-20220524100215-10.png||height="382" width="723"]]
1434
1435
1436 == 3.7 LEDs Indicators ==
1437
1438 [[image:image-20220524100748-11.png]]
1439
1440
1441 = 4. Use AT Command =
1442
1443 == 4.1 Access AT Command ==
1444
1445 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.
1446
1447 [[image:1653358238933-385.png]]
1448
1449 (((
1450 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:
1451 )))
1452
1453 [[image:1653358355238-883.png]]
1454
1455 (((
1456 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/]]
1457 )))
1458
1459 (((
1460 AT+<CMD>?        : Help on <CMD>
1461 )))
1462
1463 (((
1464 AT+<CMD>         : Run <CMD>
1465 )))
1466
1467 (((
1468 AT+<CMD>=<value> : Set the value
1469 )))
1470
1471 (((
1472 AT+<CMD>=?       : Get the value
1473 )))
1474
1475 (((
1476 ATZ: Trig a reset of the MCU
1477 )))
1478
1479 (((
1480 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1481 )))
1482
1483 (((
1484 AT+DEUI: Get or Set the Device EUI
1485 )))
1486
1487 (((
1488 AT+DADDR: Get or Set the Device Address
1489 )))
1490
1491 (((
1492 AT+APPKEY: Get or Set the Application Key
1493 )))
1494
1495 (((
1496 AT+NWKSKEY: Get or Set the Network Session Key
1497 )))
1498
1499 (((
1500 AT+APPSKEY: Get or Set the Application Session Key
1501 )))
1502
1503 (((
1504 AT+APPEUI: Get or Set the Application EUI
1505 )))
1506
1507 (((
1508 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1509 )))
1510
1511 (((
1512 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1513 )))
1514
1515 (((
1516 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1517 )))
1518
1519 (((
1520 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1521 )))
1522
1523 (((
1524 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1525 )))
1526
1527 (((
1528 AT+RX2FQ: Get or Set the Rx2 window frequency
1529 )))
1530
1531 (((
1532 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1533 )))
1534
1535 (((
1536 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1537 )))
1538
1539 (((
1540 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1541 )))
1542
1543 (((
1544 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1545 )))
1546
1547 (((
1548 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1549 )))
1550
1551 (((
1552 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1553 )))
1554
1555 (((
1556 AT+NWKID: Get or Set the Network ID
1557 )))
1558
1559 (((
1560 AT+FCU: Get or Set the Frame Counter Uplink
1561 )))
1562
1563 (((
1564 AT+FCD: Get or Set the Frame Counter Downlink
1565 )))
1566
1567 (((
1568 AT+CLASS: Get or Set the Device Class
1569 )))
1570
1571 (((
1572 AT+JOIN: Join network
1573 )))
1574
1575 (((
1576 AT+NJS: Get OTAA Join Status
1577 )))
1578
1579 (((
1580 AT+SENDB: Send hexadecimal data along with the application port
1581 )))
1582
1583 (((
1584 AT+SEND: Send text data along with the application port
1585 )))
1586
1587 (((
1588 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1589 )))
1590
1591 (((
1592 AT+RECV: Print last received data in raw format
1593 )))
1594
1595 (((
1596 AT+VER: Get current image version and Frequency Band
1597 )))
1598
1599 (((
1600 AT+CFM: Get or Set the confirmation mode (0-1)
1601 )))
1602
1603 (((
1604 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1605 )))
1606
1607 (((
1608 AT+SNR: Get the SNR of the last received packet
1609 )))
1610
1611 (((
1612 AT+RSSI: Get the RSSI of the last received packet
1613 )))
1614
1615 (((
1616 AT+TDC: Get or set the application data transmission interval in ms
1617 )))
1618
1619 (((
1620 AT+PORT: Get or set the application port
1621 )))
1622
1623 (((
1624 AT+DISAT: Disable AT commands
1625 )))
1626
1627 (((
1628 AT+PWORD: Set password, max 9 digits
1629 )))
1630
1631 (((
1632 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1633 )))
1634
1635 (((
1636 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1637 )))
1638
1639 (((
1640 AT+CFG: Print all settings
1641
1642
1643 )))
1644
1645 == 4.2 Common AT Command Sequence ==
1646
1647 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1648
1649 (((
1650 If device has not joined network yet:
1651 )))
1652
1653 (((
1654 (% style="background-color:#dcdcdc" %)123456
1655 )))
1656
1657 (((
1658 (% style="background-color:#dcdcdc" %)AT+FDR
1659 )))
1660
1661 (((
1662 (% style="background-color:#dcdcdc" %)123456
1663 )))
1664
1665 (((
1666 (% style="background-color:#dcdcdc" %)AT+NJM=0
1667 )))
1668
1669 (((
1670 (% style="background-color:#dcdcdc" %)ATZ
1671 )))
1672
1673
1674 (((
1675 If device already joined network:
1676 )))
1677
1678 (((
1679 (% style="background-color:#dcdcdc" %)AT+NJM=0
1680 )))
1681
1682 (((
1683 (% style="background-color:#dcdcdc" %)ATZ
1684
1685
1686 )))
1687
1688 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1689
1690 (((
1691 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1692 )))
1693
1694 (((
1695 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1696 )))
1697
1698 (((
1699 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1700 )))
1701
1702 (((
1703 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1704 )))
1705
1706 (((
1707 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1708 )))
1709
1710 (((
1711 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1712 )))
1713
1714 (((
1715 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1716 )))
1717
1718 (((
1719 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1720 )))
1721
1722 (((
1723 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1724 )))
1725
1726 (((
1727 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1728 )))
1729
1730 (((
1731 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1732 )))
1733
1734 (((
1735 (% 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.
1736 )))
1737
1738 (((
1739 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1740 )))
1741
1742 (((
1743 (% style="color:red" %)**Note:**
1744 )))
1745
1746 (((
1747 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1748 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1749 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.
1750 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
1751 )))
1752
1753 (((
1754 [[image:1653359097980-169.png||height="188" width="729"]]
1755 )))
1756
1757 (((
1758
1759 )))
1760
1761 === 4.2.3 Change to Class A ===
1762
1763 If sensor JOINED
1764 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1765 ATZ
1766
1767
1768 = 5. FAQ =
1769
1770 == 5.1 How to upgrade the image? ==
1771
1772 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1773
1774 * Support new features
1775 * For bug fix
1776 * Change LoRaWAN bands.
1777 Below shows the hardware connection for how to upload an image to the LT:
1778 * [[image:1653359603330-121.png]]
1779
1780 (((
1781 **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]].
1782 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1783 **Step3: **Open flashloader; choose the correct COM port to update.
1784 **For LT-22222-L**:
1785 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.
1786 )))
1787
1788 [[image:image-20220524103407-12.png]]
1789
1790 [[image:image-20220524103429-13.png]]
1791
1792 [[image:image-20220524104033-15.png]]
1793
1794 (% 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:
1795
1796 [[image:1653360054704-518.png||height="186" width="745"]]
1797
1798
1799 (((
1800 (((
1801 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1802 )))
1803 )))
1804
1805 (((
1806 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1807
1808
1809 )))
1810
1811 (((
1812 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1813 )))
1814
1815 (((
1816 (((
1817 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1818 )))
1819 )))
1820
1821 (((
1822 (((
1823 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1824 )))
1825 )))
1826
1827 (((
1828 (% 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.
1829 )))
1830
1831 (((
1832 [[image:1653360231087-571.png||height="401" width="727"]]
1833 )))
1834
1835 (((
1836 (% 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.
1837 )))
1838
1839 (((
1840 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1841 )))
1842
1843 (((
1844 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1845 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1846 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1847 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1848 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1849 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1850 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1851 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1852 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1853 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1854 )))
1855
1856 (((
1857 As shown in below:
1858 )))
1859
1860 [[image:1653360498588-932.png||height="485" width="726"]]
1861
1862
1863 == 5.4 Can I see counting event in Serial? ==
1864
1865 (((
1866 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.
1867
1868
1869 )))
1870
1871 (((
1872 = 6. Trouble Shooting =
1873 )))
1874
1875 (((
1876 (((
1877 == 6.1 Downlink doesn’t work, how to solve it? ==
1878 )))
1879 )))
1880
1881 (((
1882 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1883
1884
1885 )))
1886
1887 (((
1888 == 6.2 Have trouble to upload image. ==
1889 )))
1890
1891 (((
1892 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1893 )))
1894
1895 (((
1896
1897 )))
1898
1899 (((
1900 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1901 )))
1902
1903 (((
1904 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1905 )))
1906
1907 (((
1908
1909 )))
1910
1911 (((
1912 = 7. Order Info =
1913 )))
1914
1915 (((
1916 (((
1917 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1918 )))
1919 )))
1920
1921 (((
1922 (((
1923 (% style="color:#4f81bd" %)**XXX:**
1924 )))
1925 )))
1926
1927 (((
1928 * (((
1929 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1930 )))
1931 )))
1932
1933 (((
1934 * (((
1935 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1936 )))
1937 )))
1938
1939 (((
1940 * (((
1941 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1942 )))
1943 )))
1944
1945 (((
1946 * (((
1947 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1948 )))
1949 )))
1950
1951 (((
1952 * (((
1953 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1954 )))
1955 )))
1956
1957 (((
1958 * (((
1959 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1960 )))
1961 )))
1962
1963 (((
1964 * (((
1965 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1966 )))
1967 )))
1968
1969 (((
1970 * (((
1971 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1972 )))
1973 )))
1974
1975 (((
1976 * (((
1977 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1978
1979
1980 )))
1981
1982 = 8. Packing Info =
1983 )))
1984
1985 (((
1986 (((
1987 **Package Includes**:
1988 )))
1989 )))
1990
1991 (((
1992 (((
1993 * LT-22222-L I/O Controller x 1
1994 * Stick Antenna for LoRa RF part x 1
1995 * Bracket for controller x1
1996 * Program cable x 1
1997 )))
1998 )))
1999
2000 (((
2001 (((
2002 **Dimension and weight**:
2003 )))
2004 )))
2005
2006 (((
2007 (((
2008 * Device Size: 13.5 x 7 x 3 cm
2009 * Device Weight: 105g
2010 * Package Size / pcs : 14.5 x 8 x 5 cm
2011 * Weight / pcs : 170g
2012
2013
2014 )))
2015 )))
2016
2017 (((
2018 = 9. Support =
2019 )))
2020
2021 * (((
2022 (((
2023 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.
2024 )))
2025 )))
2026 * (((
2027 (((
2028 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
2029 )))
2030 )))
2031
2032 (((
2033 (((
2034 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2035
2036
2037 )))
2038
2039 (((
2040 = 10. Reference​​​​​ =
2041
2042 * Product Page:
2043
2044 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]]
2045
2046 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2047 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2048 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2049 )))
2050 )))