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Version 75.16 by Xiaoling on 2022/06/01 17:41
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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
618 (% style="color:#4f81bd" %)**Trigger base on current**:
619
620 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
621
622 **Example:**
623
624 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
625
626
627 (% style="color:#4f81bd" %)**Trigger base on DI status**:
628
629 DI status trigger Flag.
630
631 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
632
633 **Example:**
634
635 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
636
637
638 **Downlink Command to set Trigger Condition**
639
640 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
641
642 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
643
644 AA: Code for this downlink Command:
645
646 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
647
648 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
649
650 yy2 yy2: AC1 or AV1 high limit.
651
652 yy3 yy3: AC2 or AV2 low limit.
653
654 Yy4 yy4: AC2 or AV2 high limit.
655
656 **Example1**: AA 00 13 88 00 00 00 00 00 00
657
658 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
659
660 **Example2**: AA 02 01 00
661
662 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
663
664 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
665
666 MOD6 Payload : total 11 bytes payload
667
668 [[image:image-20220524085923-1.png]]
669
670 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
671
672 [[image:image-20220524090106-2.png]]
673
674 * Each bits shows if the corresponding trigger has been configured.
675
676 **Example:**
677
678 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
679
680
681 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
682
683 [[image:image-20220524090249-3.png]]
684
685 * Each bits shows which status has been trigger on this uplink.
686
687 **Example:**
688
689 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
690
691
692 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
693
694 [[image:image-20220524090456-4.png]]
695
696 * Each bits shows which status has been trigger on this uplink.
697
698 **Example:**
699
700 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
701
702 00000101: Means both DI1 and DI2 trigger are enabled.
703
704
705 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
706
707 Downlink command to poll MOD6 status:
708
709 **AB 06**
710
711 When device got this command, it will send the MOD6 payload.
712
713
714 === 3.3.7 Payload Decoder ===
715
716 (((
717 **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/]]
718
719
720 )))
721
722 == 3.4 ​Configure LT via AT or Downlink ==
723
724 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
725
726 (((
727 There are two kinds of Commands:
728 )))
729
730 * (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
731
732 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
733
734 === 3.4.1 Common Commands ===
735
736 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]]
737
738
739 === 3.4.2 Sensor related commands ===
740
741 ==== 3.4.2.1 Set Transmit Interval ====
742
743 Set device uplink interval.
744
745 * AT Command:
746
747 (% class="box infomessage" %)
748 (((
749 **AT+TDC=N **
750 )))
751
752 **Example: **AT+TDC=30000. Means set interval to 30 seconds
753
754 * Downlink Payload (prefix 0x01):
755
756 (% class="box infomessage" %)
757 (((
758 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
759 )))
760
761
762 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
763
764 Set work mode.
765
766 * AT Command:
767
768 (% class="box infomessage" %)
769 (((
770 **AT+MOD=N  **
771 )))
772
773 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
774
775 * Downlink Payload (prefix 0x0A):
776
777 (% class="box infomessage" %)
778 (((
779 **0x0A aa     ~/~/ Same as AT+MOD=aa**
780 )))
781
782
783 ==== 3.4.2.3 Poll an uplink ====
784
785 * AT Command:
786
787 There is no AT Command to poll uplink
788
789 * Downlink Payload (prefix 0x08):
790
791 (% class="box infomessage" %)
792 (((
793 **0x08 FF     ~/~/ Poll an uplink,**
794 )))
795
796 **Example**: 0x08FF, ask device to send an Uplink
797
798
799 ==== 3.4.2.4 Enable Trigger Mode ====
800
801 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
802
803 * AT Command:
804
805 (% class="box infomessage" %)
806 (((
807 **AT+ADDMOD6=1 or 0**
808 )))
809
810 1: Enable Trigger Mode
811
812 0: Disable Trigger Mode
813
814 * Downlink Payload (prefix 0x0A 06):
815
816 (% class="box infomessage" %)
817 (((
818 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
819 )))
820
821
822 ==== 3.4.2.5 Poll trigger settings ====
823
824 Poll trigger settings,
825
826 * AT Command:
827
828 There is no AT Command for this feature.
829
830 * Downlink Payload (prefix 0x AB 06):
831
832 (% class="box infomessage" %)
833 (((
834 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
835 )))
836
837
838 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
839
840 Enable Disable DI1/DI2/DI2 as trigger,
841
842 * AT Command:
843
844 (% class="box infomessage" %)
845 (((
846 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
847 )))
848
849 **Example:**
850
851 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
852
853 * Downlink Payload (prefix 0xAA 02):
854
855 (% class="box infomessage" %)
856 (((
857 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
858 )))
859
860
861 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
862
863 Set DI1 or DI3(for LT-33222-L) trigger.
864
865 * AT Command:
866
867 (% class="box infomessage" %)
868 (((
869 **AT+TRIG1=a,b**
870 )))
871
872 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
873
874 b : delay timing.
875
876 **Example:**
877
878 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
879
880 * Downlink Payload (prefix 0x09 01 ):
881
882 (% class="box infomessage" %)
883 (((
884 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
885 )))
886
887
888 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
889
890 Set DI2 trigger.
891
892 * AT Command:
893
894 (% class="box infomessage" %)
895 (((
896 **AT+TRIG2=a,b**
897 )))
898
899 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
900
901 b : delay timing.
902
903 **Example:**
904
905 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
906
907 * Downlink Payload (prefix 0x09 02 ):
908
909 (% class="box infomessage" %)
910 (((
911 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
912 )))
913
914
915 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
916
917 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
918
919 * AT Command:
920
921 (% class="box infomessage" %)
922 (((
923 **AT+ACLIM. **
924 )))
925
926 * Downlink Payload (prefix 0xAA 01 ):
927
928 (% class="box infomessage" %)
929 (((
930 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
931 )))
932
933
934 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
935
936 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
937
938 * AT Command:
939
940 (% class="box infomessage" %)
941 (((
942 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
943 )))
944
945 * Downlink Payload (prefix 0xAA 00 ):
946
947 (% class="box infomessage" %)
948 (((
949 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
950 )))
951
952
953 ==== 3.4.2.11 Trigger – Set minimum interval ====
954
955 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
956
957 * AT Command:
958
959 (% class="box infomessage" %)
960 (((
961 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
962 )))
963
964 * Downlink Payload (prefix 0xAC ):
965
966 (% class="box infomessage" %)
967 (((
968 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
969 )))
970
971
972 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
973
974 * AT Command:
975
976 There is no AT Command to control Digital Output
977
978 * Downlink Payload (prefix 0x02):
979
980 (% class="box infomessage" %)
981 (((
982 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
983 )))
984
985 (((
986 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
987 )))
988
989 (((
990 01: Low,  00: High ,  11: No action
991 )))
992
993 [[image:image-20220524092754-5.png]]
994
995 (((
996 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
997 )))
998
999 (((
1000 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1001 )))
1002
1003
1004 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1005
1006 * AT Command:
1007
1008 There is no AT Command to control Digital Output
1009
1010 * Downlink Payload (prefix 0xA9):
1011
1012 (% class="box infomessage" %)
1013 (((
1014 (((
1015 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1016 )))
1017 )))
1018
1019 This is to control the digital output time of DO pin. Include four bytes:
1020
1021 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1022
1023 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1024
1025 01: DO pins will change back to original state after timeout.
1026
1027 00: DO pins will change to an inverter state after timeout 
1028
1029 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1030
1031 [[image:image-20220524093238-6.png]]
1032
1033 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1034
1035 [[image:image-20220524093328-7.png]]
1036
1037 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1038
1039 [[image:image-20220524093351-8.png]]
1040
1041 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1042
1043 Latching time. Unit: ms
1044
1045 Device will upload a packet if downlink code executes successfully.
1046
1047 **Example payload:**
1048
1049 **~1. A9 01 01 01 01 07 D0**
1050
1051 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1052
1053 **2. A9 01 00 01 11 07 D0**
1054
1055 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1056
1057 **3. A9 00 00 00 00 07 D0**
1058
1059 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1060
1061 **4. A9 00 11 01 00 07 D0**
1062
1063 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
1064
1065
1066 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1067
1068 * AT Command:
1069
1070 There is no AT Command to control Relay Output
1071
1072 * Downlink Payload (prefix 0x03):
1073
1074 (% class="box infomessage" %)
1075 (((
1076 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1077 )))
1078
1079 (((
1080 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1081 )))
1082
1083 (((
1084 01: Close ,  00: Open , 11: No action
1085 )))
1086
1087 (((
1088 [[image:image-20220524093724-9.png]]
1089 )))
1090
1091 Device will upload a packet if downlink code executes successfully.
1092
1093
1094 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1095
1096 * AT Command:
1097
1098 There is no AT Command to control Relay Output
1099
1100 * Downlink Payload (prefix 0x05):
1101
1102 (% class="box infomessage" %)
1103 (((
1104 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1105 )))
1106
1107 This is to control the relay output time of relay. Include four bytes:
1108
1109 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1110
1111 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1112
1113 01: Relays will change back to original state after timeout.
1114
1115 00: Relays will change to an inverter state after timeout
1116
1117 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1118
1119 [[image:image-20220524093831-10.png]]
1120
1121 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1122
1123 Device will upload a packet if downlink code executes successfully.
1124
1125 **Example payload:**
1126
1127 **~1. 05 01 11 07 D0**
1128
1129 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1130
1131 **2. 05 01 10 07 D0**
1132
1133 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1134
1135 **3. 05 00 01 07 D0**
1136
1137 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1138
1139 **4. 05 00 00 07 D0**
1140
1141 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1142
1143
1144 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1145
1146 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1147
1148 * AT Command:
1149
1150 (% class="box infomessage" %)
1151 (((
1152 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1153 )))
1154
1155 * Downlink Payload (prefix 0xA5):
1156
1157 (% class="box infomessage" %)
1158 (((
1159 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1160 )))
1161
1162
1163 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1164
1165 * AT Command:
1166
1167 (% class="box infomessage" %)
1168 (((
1169 **AT+SETCNT=aa,(bb cc dd ee) **
1170 )))
1171
1172 aa: 1: Set count1,
1173
1174 2: Set count2,
1175
1176 3: Set AV1 count
1177
1178 Bb cc dd ee: number to be set
1179
1180 * Downlink Payload (prefix 0xA8):
1181
1182 (% class="box infomessage" %)
1183 (((
1184 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1185 )))
1186
1187
1188 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1189
1190 Clear counting for counting mode
1191
1192 * AT Command:
1193
1194 (% class="box infomessage" %)
1195 (((
1196 **AT+CLRCOUNT ~/~/ clear all counting**
1197 )))
1198
1199 * Downlink Payload (prefix 0xA6):
1200
1201 (% class="box infomessage" %)
1202 (((
1203 **0x A6 01     ~/~/ clear all counting,**
1204 )))
1205
1206
1207 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1208
1209 * AT Command:
1210
1211 (% class="box infomessage" %)
1212 (((
1213 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1214 )))
1215
1216 * Downlink Payload (prefix 0xA7):
1217
1218 (% class="box infomessage" %)
1219 (((
1220 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1221 )))
1222
1223 (((
1224 range: aa bb cc:0 to 16777215,  (unit:second)
1225
1226
1227 )))
1228
1229 == 3.5 Integrate with Mydevice ==
1230
1231 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:
1232
1233 (((
1234 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1235 )))
1236
1237 (((
1238 **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:
1239 )))
1240
1241 [[image:1653356737703-362.png||height="232" width="732"]]
1242
1243 [[image:image-20220524094641-11.png||height="390" width="723"]]
1244
1245 [[image:image-20220524094641-12.png||height="402" width="718"]]
1246
1247 **Step 3**: Create an account or log in Mydevices.
1248
1249 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1250
1251 Search under The things network
1252
1253 [[image:1653356838789-523.png||height="337" width="740"]]
1254
1255
1256 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1257
1258 [[image:image-20220524094909-1.png||height="335" width="729"]]
1259
1260 [[image:image-20220524094909-2.png||height="337" width="729"]]
1261
1262 [[image:image-20220524094909-3.png||height="338" width="727"]]
1263
1264 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1265
1266 [[image:image-20220524094909-5.png||height="341" width="734"]]
1267
1268
1269 == 3.6 Interface Detail ==
1270
1271 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1272
1273 Support NPN Type sensor
1274
1275 [[image:1653356991268-289.png]]
1276
1277
1278 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1279
1280 (((
1281 The DI port of LT-22222-L can support NPN or PNP output sensor.
1282 )))
1283
1284 (((
1285 (((
1286 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
1287 )))
1288 )))
1289
1290 [[image:1653357170703-587.png]]
1291
1292 (((
1293 (((
1294 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1295 )))
1296 )))
1297
1298 (((
1299
1300 )))
1301
1302 (((
1303 **Example1**: Connect to a Low active sensor.
1304 )))
1305
1306 (((
1307 This type of sensor will output a low signal GND when active.
1308 )))
1309
1310 * (((
1311 Connect sensor’s output to DI1-
1312 )))
1313 * (((
1314 Connect sensor’s VCC to DI1+.
1315 )))
1316
1317 (((
1318 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1319 )))
1320
1321 (((
1322 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1323 )))
1324
1325 (((
1326 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.
1327 )))
1328
1329 (((
1330
1331 )))
1332
1333 (((
1334 **Example2**: Connect to a High active sensor.
1335 )))
1336
1337 (((
1338 This type of sensor will output a high signal (example 24v) when active.
1339 )))
1340
1341 * (((
1342 Connect sensor’s output to DI1+
1343 )))
1344 * (((
1345 Connect sensor’s GND DI1-.
1346 )))
1347
1348 (((
1349 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1350 )))
1351
1352 (((
1353 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1354 )))
1355
1356 (((
1357 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.
1358 )))
1359
1360 (((
1361
1362 )))
1363
1364 (((
1365 **Example3**: Connect to a 220v high active sensor.
1366 )))
1367
1368 (((
1369 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1370 )))
1371
1372 * (((
1373 Connect sensor’s output to DI1+ with a serial 50K resistor
1374 )))
1375 * (((
1376 Connect sensor’s GND DI1-.
1377 )))
1378
1379 (((
1380 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1381 )))
1382
1383 (((
1384 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1385 )))
1386
1387 (((
1388 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.
1389 )))
1390
1391
1392 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1393
1394 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1395
1396 [[image:1653357531600-905.png]]
1397
1398
1399 === 3.6.4 Analog Input Interface ===
1400
1401 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:
1402
1403 **AC2 = (IN2 voltage )/12**
1404
1405 [[image:1653357592296-182.png]]
1406
1407 Example to connect a 4~~20mA sensor
1408
1409 We take the wind speed sensor as an example for reference only.
1410
1411 Specifications of the wind speed sensor:
1412
1413 Red:12~~24v
1414
1415 Yellow:4~~20mA
1416
1417 Black:GND
1418
1419
1420 Connection diagram:
1421
1422 [[image:1653357640609-758.png]]
1423
1424 [[image:1653357648330-671.png||height="155" width="733"]]
1425
1426
1427 === 3.6.5 Relay Output ===
1428
1429 (((
1430 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:
1431 )))
1432
1433 [[image:image-20220524100215-9.png]]
1434
1435 [[image:image-20220524100215-10.png||height="382" width="723"]]
1436
1437
1438 == 3.7 LEDs Indicators ==
1439
1440 [[image:image-20220524100748-11.png]]
1441
1442
1443 = 4. Use AT Command =
1444
1445 == 4.1 Access AT Command ==
1446
1447 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.
1448
1449 [[image:1653358238933-385.png]]
1450
1451 (((
1452 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:
1453 )))
1454
1455 [[image:1653358355238-883.png]]
1456
1457 (((
1458 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/]]
1459 )))
1460
1461 (((
1462 AT+<CMD>?        : Help on <CMD>
1463 )))
1464
1465 (((
1466 AT+<CMD>         : Run <CMD>
1467 )))
1468
1469 (((
1470 AT+<CMD>=<value> : Set the value
1471 )))
1472
1473 (((
1474 AT+<CMD>=?       : Get the value
1475 )))
1476
1477 (((
1478 ATZ: Trig a reset of the MCU
1479 )))
1480
1481 (((
1482 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1483 )))
1484
1485 (((
1486 AT+DEUI: Get or Set the Device EUI
1487 )))
1488
1489 (((
1490 AT+DADDR: Get or Set the Device Address
1491 )))
1492
1493 (((
1494 AT+APPKEY: Get or Set the Application Key
1495 )))
1496
1497 (((
1498 AT+NWKSKEY: Get or Set the Network Session Key
1499 )))
1500
1501 (((
1502 AT+APPSKEY: Get or Set the Application Session Key
1503 )))
1504
1505 (((
1506 AT+APPEUI: Get or Set the Application EUI
1507 )))
1508
1509 (((
1510 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1511 )))
1512
1513 (((
1514 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1515 )))
1516
1517 (((
1518 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1519 )))
1520
1521 (((
1522 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1523 )))
1524
1525 (((
1526 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1527 )))
1528
1529 (((
1530 AT+RX2FQ: Get or Set the Rx2 window frequency
1531 )))
1532
1533 (((
1534 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1535 )))
1536
1537 (((
1538 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1539 )))
1540
1541 (((
1542 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1543 )))
1544
1545 (((
1546 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1547 )))
1548
1549 (((
1550 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1551 )))
1552
1553 (((
1554 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1555 )))
1556
1557 (((
1558 AT+NWKID: Get or Set the Network ID
1559 )))
1560
1561 (((
1562 AT+FCU: Get or Set the Frame Counter Uplink
1563 )))
1564
1565 (((
1566 AT+FCD: Get or Set the Frame Counter Downlink
1567 )))
1568
1569 (((
1570 AT+CLASS: Get or Set the Device Class
1571 )))
1572
1573 (((
1574 AT+JOIN: Join network
1575 )))
1576
1577 (((
1578 AT+NJS: Get OTAA Join Status
1579 )))
1580
1581 (((
1582 AT+SENDB: Send hexadecimal data along with the application port
1583 )))
1584
1585 (((
1586 AT+SEND: Send text data along with the application port
1587 )))
1588
1589 (((
1590 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1591 )))
1592
1593 (((
1594 AT+RECV: Print last received data in raw format
1595 )))
1596
1597 (((
1598 AT+VER: Get current image version and Frequency Band
1599 )))
1600
1601 (((
1602 AT+CFM: Get or Set the confirmation mode (0-1)
1603 )))
1604
1605 (((
1606 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1607 )))
1608
1609 (((
1610 AT+SNR: Get the SNR of the last received packet
1611 )))
1612
1613 (((
1614 AT+RSSI: Get the RSSI of the last received packet
1615 )))
1616
1617 (((
1618 AT+TDC: Get or set the application data transmission interval in ms
1619 )))
1620
1621 (((
1622 AT+PORT: Get or set the application port
1623 )))
1624
1625 (((
1626 AT+DISAT: Disable AT commands
1627 )))
1628
1629 (((
1630 AT+PWORD: Set password, max 9 digits
1631 )))
1632
1633 (((
1634 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1635 )))
1636
1637 (((
1638 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1639 )))
1640
1641 (((
1642 AT+CFG: Print all settings
1643
1644
1645 )))
1646
1647 == 4.2 Common AT Command Sequence ==
1648
1649 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1650
1651 (((
1652 If device has not joined network yet:
1653 )))
1654
1655 (((
1656 (% style="background-color:#dcdcdc" %)123456
1657 )))
1658
1659 (((
1660 (% style="background-color:#dcdcdc" %)AT+FDR
1661 )))
1662
1663 (((
1664 (% style="background-color:#dcdcdc" %)123456
1665 )))
1666
1667 (((
1668 (% style="background-color:#dcdcdc" %)AT+NJM=0
1669 )))
1670
1671 (((
1672 (% style="background-color:#dcdcdc" %)ATZ
1673 )))
1674
1675
1676 (((
1677 If device already joined network:
1678 )))
1679
1680 (((
1681 (% style="background-color:#dcdcdc" %)AT+NJM=0
1682 )))
1683
1684 (((
1685 (% style="background-color:#dcdcdc" %)ATZ
1686
1687
1688 )))
1689
1690 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1691
1692 (((
1693 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1694 )))
1695
1696 (((
1697 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1698 )))
1699
1700 (((
1701 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1702 )))
1703
1704 (((
1705 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1706 )))
1707
1708 (((
1709 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1710 )))
1711
1712 (((
1713 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1714 )))
1715
1716 (((
1717 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1718 )))
1719
1720 (((
1721 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1722 )))
1723
1724 (((
1725 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1726 )))
1727
1728 (((
1729 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1730 )))
1731
1732 (((
1733 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1734 )))
1735
1736 (((
1737 (% 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.
1738 )))
1739
1740 (((
1741 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1742 )))
1743
1744 (((
1745 (% style="color:red" %)**Note:**
1746 )))
1747
1748 (((
1749 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1750 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1751 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.
1752 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
1753 )))
1754
1755 (((
1756 [[image:1653359097980-169.png||height="188" width="729"]]
1757 )))
1758
1759 (((
1760
1761 )))
1762
1763 === 4.2.3 Change to Class A ===
1764
1765 If sensor JOINED
1766 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1767 ATZ
1768
1769
1770 = 5. FAQ =
1771
1772 == 5.1 How to upgrade the image? ==
1773
1774 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1775
1776 * Support new features
1777 * For bug fix
1778 * Change LoRaWAN bands.
1779 Below shows the hardware connection for how to upload an image to the LT:
1780 * [[image:1653359603330-121.png]]
1781
1782 (((
1783 **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]].
1784 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1785 **Step3: **Open flashloader; choose the correct COM port to update.
1786 **For LT-22222-L**:
1787 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.
1788 )))
1789
1790 [[image:image-20220524103407-12.png]]
1791
1792 [[image:image-20220524103429-13.png]]
1793
1794 [[image:image-20220524104033-15.png]]
1795
1796 (% 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:
1797
1798 [[image:1653360054704-518.png||height="186" width="745"]]
1799
1800
1801 (((
1802 (((
1803 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1804 )))
1805 )))
1806
1807 (((
1808 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1809
1810
1811 )))
1812
1813 (((
1814 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1815 )))
1816
1817 (((
1818 (((
1819 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1820 )))
1821 )))
1822
1823 (((
1824 (((
1825 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1826 )))
1827 )))
1828
1829 (((
1830 (% 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.
1831 )))
1832
1833 (((
1834 [[image:1653360231087-571.png||height="401" width="727"]]
1835 )))
1836
1837 (((
1838 (% 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.
1839 )))
1840
1841 (((
1842 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1843 )))
1844
1845 (((
1846 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1847 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1848 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1849 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1850 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1851 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1852 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1853 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1854 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1855 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1856 )))
1857
1858 (((
1859 As shown in below:
1860 )))
1861
1862 [[image:1653360498588-932.png||height="485" width="726"]]
1863
1864
1865 == 5.4 Can I see counting event in Serial? ==
1866
1867 (((
1868 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.
1869
1870
1871 )))
1872
1873 (((
1874 = 6. Trouble Shooting =
1875 )))
1876
1877 (((
1878 (((
1879 == 6.1 Downlink doesn’t work, how to solve it? ==
1880 )))
1881 )))
1882
1883 (((
1884 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1885
1886
1887 )))
1888
1889 (((
1890 == 6.2 Have trouble to upload image. ==
1891 )))
1892
1893 (((
1894 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1895 )))
1896
1897 (((
1898
1899 )))
1900
1901 (((
1902 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1903 )))
1904
1905 (((
1906 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1907 )))
1908
1909 (((
1910
1911 )))
1912
1913 (((
1914 = 7. Order Info =
1915 )))
1916
1917 (((
1918 (((
1919 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1920 )))
1921 )))
1922
1923 (((
1924 (((
1925 (% style="color:#4f81bd" %)**XXX:**
1926 )))
1927 )))
1928
1929 (((
1930 * (((
1931 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1932 )))
1933 )))
1934
1935 (((
1936 * (((
1937 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1938 )))
1939 )))
1940
1941 (((
1942 * (((
1943 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1944 )))
1945 )))
1946
1947 (((
1948 * (((
1949 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1950 )))
1951 )))
1952
1953 (((
1954 * (((
1955 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1956 )))
1957 )))
1958
1959 (((
1960 * (((
1961 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1962 )))
1963 )))
1964
1965 (((
1966 * (((
1967 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1968 )))
1969 )))
1970
1971 (((
1972 * (((
1973 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1974 )))
1975 )))
1976
1977 (((
1978 * (((
1979 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1980
1981
1982 )))
1983
1984 = 8. Packing Info =
1985 )))
1986
1987 (((
1988 (((
1989 **Package Includes**:
1990 )))
1991 )))
1992
1993 (((
1994 (((
1995 * LT-22222-L I/O Controller x 1
1996 * Stick Antenna for LoRa RF part x 1
1997 * Bracket for controller x1
1998 * Program cable x 1
1999 )))
2000 )))
2001
2002 (((
2003 (((
2004 **Dimension and weight**:
2005 )))
2006 )))
2007
2008 (((
2009 (((
2010 * Device Size: 13.5 x 7 x 3 cm
2011 * Device Weight: 105g
2012 * Package Size / pcs : 14.5 x 8 x 5 cm
2013 * Weight / pcs : 170g
2014
2015
2016 )))
2017 )))
2018
2019 (((
2020 = 9. Support =
2021 )))
2022
2023 * (((
2024 (((
2025 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.
2026 )))
2027 )))
2028 * (((
2029 (((
2030 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
2031 )))
2032 )))
2033
2034 (((
2035 (((
2036 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2037
2038
2039 )))
2040
2041 (((
2042 = 10. Reference​​​​​ =
2043
2044 * Product Page:
2045
2046 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]]
2047
2048 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2049 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2050 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2051 )))
2052 )))