Version 75.8 by Xiaoling on 2022/06/01 17:28
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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 = 2. Power ON Device =
197
198 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.
199
200 (((
201 PWR will on when device is properly powered.
202 )))
203
204 [[image:1653297104069-180.png]]
205
206
207 = 3. Operation Mode =
208
209 == 3.1 How it works? ==
210
211 (((
212 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. 
213 )))
214
215 (((
216 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.
217
218
219 )))
220
221 == 3.2 Example to join LoRaWAN network ==
222
223 (((
224 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. 
225 )))
226
227 [[image:image-20220523172350-1.png||height="266" width="864"]]
228
229 (((
230 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:
231 )))
232
233 (((
234 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
235 )))
236
237 (((
238 Each LT is shipped with a sticker with the default device EUI as below:
239 )))
240
241 [[image:1653297924498-393.png]]
242
243 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
244
245 Add APP EUI in the application.
246
247 [[image:1653297955910-247.png||height="321" width="716"]]
248
249
250 Add APP KEY and DEV EUI
251
252 [[image:1653298023685-319.png]]
253
254
255 (((
256 **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.
257 )))
258
259 [[image:1653298044601-602.png||height="405" width="709"]]
260
261
262 == 3.3 Uplink Payload ==
263
264 There are five working modes + one interrupt mode on LT for different type application:
265
266 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
267 * **MOD2**: Double DI Counting + DO + RO
268 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
269 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
270 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
271 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
272
273 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
274
275 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
276
277 [[image:image-20220523174024-3.png]]
278
279 (((
280 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
281 )))
282
283 [[image:image-20220523174254-4.png]]
284
285 * RO is for relay. ROx=1 : close，ROx=0 always open.
286 * DI is for digital input. DIx=1: high or float, DIx=0: low.
287 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
288
289 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
290
291 For example if payload is: [[image:image-20220523175847-2.png]]
292
293 **The value for the interface is:  **
294
295 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
296
297 AVI2 channel voltage is 0x04AC/1000=1.196V
298
299 ACI1 channel current is 0x1310/1000=4.880mA
300
301 ACI2 channel current is 0x1300/1000=4.864mA
302
303 The last byte 0xAA= 10101010(B) means
304
305 * [1] RO1 relay channel is close and the RO1 LED is ON.
306 * [0] RO2 relay channel is open and RO2 LED is OFF;
307
308 **LT22222-L:**
309
310 * [1] DI2 channel is high input and DI2 LED is ON;
311 * [0] DI1 channel is low input;
312
313 * [0] DO3 channel output state
314 ** DO3 is float in case no load between DO3 and V+.;
315 ** DO3 is high in case there is load between DO3 and V+.
316 ** DO3 LED is off in both case
317 * [1] DO2 channel output is low and DO2 LED is ON.
318 * [0] DO1 channel output state
319 ** DO1 is float in case no load between DO1 and V+.;
320 ** DO1 is high in case there is load between DO1 and V+.
321 ** DO1 LED is off in both case
322
323 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
324
325 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
326
327 (((
328 Total : 11 bytes payload
329 )))
330
331 [[image:image-20220523180452-3.png]]
332
333 (((
334 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
335 )))
336
337 [[image:image-20220523180506-4.png]]
338
339 * RO is for relay. ROx=1 : close，ROx=0 always open.
340 * FIRST: Indicate this is the first packet after join network.
341 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
342
343 (((
344 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
345 )))
346
347 (((
348 **To use counting mode, please run:**
349 )))
350
351 (% class="box infomessage" %)
352 (((
353 (((
354 **AT+MOD=2**
355 )))
356 )))
357
358 (% class="box infomessage" %)
359 (((
360 (((
361 **ATZ**
362 )))
363 )))
364
365 (((
366 (% style="color:#4f81bd" %)**AT Commands for counting:**
367 )))
368
369 (((
370 **For LT22222-L:**
371 )))
372
373 (% class="box infomessage" %)
374 (((
375 (((
376 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
377 )))
378 )))
379
380 (% class="box infomessage" %)
381 (((
382 (((
383 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
384 )))
385 )))
386
387 (% class="box infomessage" %)
388 (((
389 (((
390 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
391 )))
392 )))
393
394 (% class="box infomessage" %)
395 (((
396 (((
397 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
398 )))
399 )))
400
401 (% class="box infomessage" %)
402 (((
403 (((
404 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
405 )))
406 )))
407
408 (% class="box infomessage" %)
409 (((
410 (((
411 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
412 )))
413 )))
414
415
416 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
417
418 **LT22222-L**: This mode the DI1 is used as a counting pin.
419
420 [[image:image-20220523181246-5.png]]
421
422 (((
423 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
424 )))
425
426 [[image:image-20220523181301-6.png]]
427
428 * RO is for relay. ROx=1 : close，ROx=0 always open.
429 * FIRST: Indicate this is the first packet after join network.
430 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
431
432 (((
433 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
434 )))
435
436 (((
437 **To use counting mode, please run:**
438 )))
439
440 (% class="box infomessage" %)
441 (((
442 (((
443 **AT+MOD=3**
444 )))
445 )))
446
447 (% class="box infomessage" %)
448 (((
449 (((
450 **ATZ**
451 )))
452 )))
453
454 (((
455 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
456
457
458 )))
459
460 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
461
462 **LT22222-L**: This mode the DI1 is used as a counting pin.
463
464 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.
465
466 [[image:image-20220523181903-8.png]]
467
468 (((
469 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
470 )))
471
472 [[image:image-20220523181727-7.png]]
473
474 * RO is for relay. ROx=1 : close，ROx=0 always open.
475 * FIRST: Indicate this is the first packet after join network.
476 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
477
478 (((
479 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
480 )))
481
482 (((
483 **To use this mode, please run:**
484 )))
485
486 (% class="box infomessage" %)
487 (((
488 (((
489 **AT+MOD=4**
490 )))
491 )))
492
493 (% class="box infomessage" %)
494 (((
495 (((
496 **ATZ**
497 )))
498 )))
499
500 (((
501
502 )))
503
504 (((
505 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
506 )))
507
508 (((
509 **Plus below command for AVI1 Counting:**
510 )))
511
512 (% class="box infomessage" %)
513 (((
514 (((
515 **AT+SETCNT=3,60   (set AVI Count to 60)**
516 )))
517 )))
518
519 (% class="box infomessage" %)
520 (((
521 (((
522 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
523 )))
524 )))
525
526 (% class="box infomessage" %)
527 (((
528 (((
529 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
530 )))
531 )))
532
533 (% class="box infomessage" %)
534 (((
535 (((
536 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
537 )))
538 )))
539
540
541 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
542
543 **LT22222-L**: This mode the DI1 is used as a counting pin.
544
545 [[image:image-20220523182334-9.png]]
546
547 (((
548 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
549 )))
550
551 * RO is for relay. ROx=1 : close，ROx=0 always open.
552 * FIRST: Indicate this is the first packet after join network.
553 * (((
554 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
555 )))
556
557 (((
558 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
559 )))
560
561 (((
562 **To use this mode, please run:**
563 )))
564
565 (% class="box infomessage" %)
566 (((
567 (((
568 **AT+MOD=5**
569 )))
570 )))
571
572 (% class="box infomessage" %)
573 (((
574 (((
575 **ATZ**
576 )))
577 )))
578
579 (((
580 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
581
582
583 )))
584
585 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
586
587 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
588
589 For example, if user has configured below commands:
590
591 * **AT+MOD=1 ** **~-~->** The normal working mode
592 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
593
594 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
595
596 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
597 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.**
598
599 **AT Command to set Trigger Condition**:
600
601 (% style="color:#4f81bd" %)**Trigger base on voltage**:
602
603 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
604
605 **Example:**
606
607 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)
608
609 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
610
611 (% style="color:#4f81bd" %)**Trigger base on current**:
612
613 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
614
615 **Example:**
616
617 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
618
619 (% style="color:#4f81bd" %)**Trigger base on DI status**:
620
621 DI status trigger Flag.
622
623 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
624
625 **Example:**
626
627 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
628
629
630 **Downlink Command to set Trigger Condition**
631
632 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
633
634 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
635
636 AA: Code for this downlink Command:
637
638 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
639
640 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
641
642 yy2 yy2: AC1 or AV1 high limit.
643
644 yy3 yy3: AC2 or AV2 low limit.
645
646 Yy4 yy4: AC2 or AV2 high limit.
647
648 **Example1**: AA 00 13 88 00 00 00 00 00 00
649
650 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
651
652 **Example2**: AA 02 01 00
653
654 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
655
656 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
657
658 MOD6 Payload : total 11 bytes payload
659
660 [[image:image-20220524085923-1.png]]
661
662 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
663
664 [[image:image-20220524090106-2.png]]
665
666 * Each bits shows if the corresponding trigger has been configured.
667
668 **Example:**
669
670 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
671
672
673 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
674
675 [[image:image-20220524090249-3.png]]
676
677 * Each bits shows which status has been trigger on this uplink.
678
679 **Example:**
680
681 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
682
683
684 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
685
686 [[image:image-20220524090456-4.png]]
687
688 * Each bits shows which status has been trigger on this uplink.
689
690 **Example:**
691
692 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
693
694 00000101: Means both DI1 and DI2 trigger are enabled.
695
696
697 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
698
699 Downlink command to poll MOD6 status:
700
701 **AB 06**
702
703 When device got this command, it will send the MOD6 payload.
704
705
706 === 3.3.7 Payload Decoder ===
707
708 (((
709 **Decoder for TTN/loraserver/ChirpStack**: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/]]
710
711
712 )))
713
714 == 3.4 ​Configure LT via AT or Downlink ==
715
716 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
717
718 (((
719 There are two kinds of Commands:
720 )))
721
722 * (% 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
723
724 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
725
726 === 3.4.1 Common Commands ===
727
728 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]]
729
730
731 === 3.4.2 Sensor related commands ===
732
733 ==== 3.4.2.1 Set Transmit Interval ====
734
735 Set device uplink interval.
736
737 * AT Command:
738
739 (% class="box infomessage" %)
740 (((
741 **AT+TDC=N **
742 )))
743
744 **Example: **AT+TDC=30000. Means set interval to 30 seconds
745
746 * Downlink Payload (prefix 0x01):
747
748 (% class="box infomessage" %)
749 (((
750 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
751 )))
752
753
754 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
755
756 Set work mode.
757
758 * AT Command:
759
760 (% class="box infomessage" %)
761 (((
762 **AT+MOD=N  **
763 )))
764
765 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
766
767 * Downlink Payload (prefix 0x0A):
768
769 (% class="box infomessage" %)
770 (((
771 **0x0A aa     ~/~/ Same as AT+MOD=aa**
772 )))
773
774
775 ==== 3.4.2.3 Poll an uplink ====
776
777 * AT Command:
778
779 There is no AT Command to poll uplink
780
781 * Downlink Payload (prefix 0x08):
782
783 (% class="box infomessage" %)
784 (((
785 **0x08 FF     ~/~/ Poll an uplink,**
786 )))
787
788 **Example**: 0x08FF, ask device to send an Uplink
789
790
791 ==== 3.4.2.4 Enable Trigger Mode ====
792
793 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]]
794
795 * AT Command:
796
797 (% class="box infomessage" %)
798 (((
799 **AT+ADDMOD6=1 or 0**
800 )))
801
802 1: Enable Trigger Mode
803
804 0: Disable Trigger Mode
805
806 * Downlink Payload (prefix 0x0A 06):
807
808 (% class="box infomessage" %)
809 (((
810 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
811 )))
812
813
814 ==== 3.4.2.5 Poll trigger settings ====
815
816 Poll trigger settings,
817
818 * AT Command:
819
820 There is no AT Command for this feature.
821
822 * Downlink Payload (prefix 0x AB 06):
823
824 (% class="box infomessage" %)
825 (((
826 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
827 )))
828
829
830 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
831
832 Enable Disable DI1/DI2/DI2 as trigger,
833
834 * AT Command:
835
836 (% class="box infomessage" %)
837 (((
838 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
839 )))
840
841 **Example:**
842
843 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
844
845 * Downlink Payload (prefix 0xAA 02):
846
847 (% class="box infomessage" %)
848 (((
849 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
850 )))
851
852
853 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
854
855 Set DI1 or DI3(for LT-33222-L) trigger.
856
857 * AT Command:
858
859 (% class="box infomessage" %)
860 (((
861 **AT+TRIG1=a,b**
862 )))
863
864 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
865
866 b : delay timing.
867
868 **Example:**
869
870 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
871
872 * Downlink Payload (prefix 0x09 01 ):
873
874 (% class="box infomessage" %)
875 (((
876 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
877 )))
878
879
880 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
881
882 Set DI2 trigger.
883
884 * AT Command:
885
886 (% class="box infomessage" %)
887 (((
888 **AT+TRIG2=a,b**
889 )))
890
891 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
892
893 b : delay timing.
894
895 **Example:**
896
897 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
898
899 * Downlink Payload (prefix 0x09 02 ):
900
901 (% class="box infomessage" %)
902 (((
903 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
904 )))
905
906
907 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
908
909 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]]
910
911 * AT Command:
912
913 (% class="box infomessage" %)
914 (((
915 **AT+ACLIM. **
916 )))
917
918 * Downlink Payload (prefix 0xAA 01 ):
919
920 (% class="box infomessage" %)
921 (((
922 **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]]**
923 )))
924
925
926 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
927
928 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]]
929
930 * AT Command:
931
932 (% class="box infomessage" %)
933 (((
934 **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]]**
935 )))
936
937 * Downlink Payload (prefix 0xAA 00 ):
938
939 (% class="box infomessage" %)
940 (((
941 **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]] **
942 )))
943
944
945 ==== 3.4.2.11 Trigger – Set minimum interval ====
946
947 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
948
949 * AT Command:
950
951 (% class="box infomessage" %)
952 (((
953 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
954 )))
955
956 * Downlink Payload (prefix 0xAC ):
957
958 (% class="box infomessage" %)
959 (((
960 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
961 )))
962
963
964 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
965
966 * AT Command:
967
968 There is no AT Command to control Digital Output
969
970 * Downlink Payload (prefix 0x02):
971
972 (% class="box infomessage" %)
973 (((
974 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
975 )))
976
977 (((
978 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
979 )))
980
981 (((
982 01: Low,  00: High ,  11: No action
983 )))
984
985 [[image:image-20220524092754-5.png]]
986
987 (((
988 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
989 )))
990
991 (((
992 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
993 )))
994
995
996 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
997
998 * AT Command:
999
1000 There is no AT Command to control Digital Output
1001
1002 * Downlink Payload (prefix 0xA9):
1003
1004 (% class="box infomessage" %)
1005 (((
1006 (((
1007 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1008 )))
1009 )))
1010
1011 This is to control the digital output time of DO pin. Include four bytes:
1012
1013 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1014
1015 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1016
1017 01: DO pins will change back to original state after timeout.
1018
1019 00: DO pins will change to an inverter state after timeout 
1020
1021 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1022
1023 [[image:image-20220524093238-6.png]]
1024
1025 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1026
1027 [[image:image-20220524093328-7.png]]
1028
1029 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1030
1031 [[image:image-20220524093351-8.png]]
1032
1033 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1034
1035 Latching time. Unit: ms
1036
1037 Device will upload a packet if downlink code executes successfully.
1038
1039 **Example payload:**
1040
1041 **~1. A9 01 01 01 01 07 D0**
1042
1043 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1044
1045 **2. A9 01 00 01 11 07 D0**
1046
1047 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1048
1049 **3. A9 00 00 00 00 07 D0**
1050
1051 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1052
1053 **4. A9 00 11 01 00 07 D0**
1054
1055 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
1056
1057
1058 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1059
1060 * AT Command:
1061
1062 There is no AT Command to control Relay Output
1063
1064 * Downlink Payload (prefix 0x03):
1065
1066 (% class="box infomessage" %)
1067 (((
1068 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1069 )))
1070
1071 (((
1072 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1073 )))
1074
1075 (((
1076 01: Close ,  00: Open , 11: No action
1077 )))
1078
1079 (((
1080 [[image:image-20220524093724-9.png]]
1081 )))
1082
1083 Device will upload a packet if downlink code executes successfully.
1084
1085
1086 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1087
1088 * AT Command:
1089
1090 There is no AT Command to control Relay Output
1091
1092 * Downlink Payload (prefix 0x05):
1093
1094 (% class="box infomessage" %)
1095 (((
1096 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1097 )))
1098
1099 This is to control the relay output time of relay. Include four bytes:
1100
1101 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1102
1103 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1104
1105 01: Relays will change back to original state after timeout.
1106
1107 00: Relays will change to an inverter state after timeout
1108
1109 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1110
1111 [[image:image-20220524093831-10.png]]
1112
1113 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1114
1115 Device will upload a packet if downlink code executes successfully.
1116
1117 **Example payload:**
1118
1119 **~1. 05 01 11 07 D0**
1120
1121 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1122
1123 **2. 05 01 10 07 D0**
1124
1125 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1126
1127 **3. 05 00 01 07 D0**
1128
1129 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1130
1131 **4. 05 00 00 07 D0**
1132
1133 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1134
1135
1136 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1137
1138 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]]
1139
1140 * AT Command:
1141
1142 (% class="box infomessage" %)
1143 (((
1144 **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]]**
1145 )))
1146
1147 * Downlink Payload (prefix 0xA5):
1148
1149 (% class="box infomessage" %)
1150 (((
1151 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1152 )))
1153
1154
1155 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1156
1157 * AT Command:
1158
1159 (% class="box infomessage" %)
1160 (((
1161 **AT+SETCNT=aa,(bb cc dd ee) **
1162 )))
1163
1164 aa: 1: Set count1,
1165
1166 2: Set count2,
1167
1168 3: Set AV1 count
1169
1170 Bb cc dd ee: number to be set
1171
1172 * Downlink Payload (prefix 0xA8):
1173
1174 (% class="box infomessage" %)
1175 (((
1176 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1177 )))
1178
1179
1180 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1181
1182 Clear counting for counting mode
1183
1184 * AT Command:
1185
1186 (% class="box infomessage" %)
1187 (((
1188 **AT+CLRCOUNT ~/~/ clear all counting**
1189 )))
1190
1191 * Downlink Payload (prefix 0xA6):
1192
1193 (% class="box infomessage" %)
1194 (((
1195 **0x A6 01     ~/~/ clear all counting,**
1196 )))
1197
1198
1199 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1200
1201 * AT Command:
1202
1203 (% class="box infomessage" %)
1204 (((
1205 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1206 )))
1207
1208 * Downlink Payload (prefix 0xA7):
1209
1210 (% class="box infomessage" %)
1211 (((
1212 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1213 )))
1214
1215 (((
1216 range: aa bb cc:0 to 16777215,  (unit:second)
1217
1218
1219 )))
1220
1221 == 3.5 Integrate with Mydevice ==
1222
1223 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:
1224
1225 (((
1226 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1227 )))
1228
1229 (((
1230 **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:
1231 )))
1232
1233 [[image:1653356737703-362.png||height="232" width="732"]]
1234
1235 [[image:image-20220524094641-11.png||height="390" width="723"]]
1236
1237 [[image:image-20220524094641-12.png||height="402" width="718"]]
1238
1239 **Step 3**: Create an account or log in Mydevices.
1240
1241 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1242
1243 Search under The things network
1244
1245 [[image:1653356838789-523.png||height="337" width="740"]]
1246
1247
1248 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1249
1250 [[image:image-20220524094909-1.png||height="335" width="729"]]
1251
1252 [[image:image-20220524094909-2.png||height="337" width="729"]]
1253
1254 [[image:image-20220524094909-3.png||height="338" width="727"]]
1255
1256 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1257
1258 [[image:image-20220524094909-5.png||height="341" width="734"]]
1259
1260
1261 == 3.6 Interface Detail ==
1262
1263 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1264
1265 Support NPN Type sensor
1266
1267 [[image:1653356991268-289.png]]
1268
1269
1270 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1271
1272 (((
1273 The DI port of LT-22222-L can support NPN or PNP output sensor.
1274 )))
1275
1276 (((
1277 (((
1278 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
1279 )))
1280 )))
1281
1282 [[image:1653357170703-587.png]]
1283
1284 (((
1285 (((
1286 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1287 )))
1288 )))
1289
1290 (((
1291
1292 )))
1293
1294 (((
1295 **Example1**: Connect to a Low active sensor.
1296 )))
1297
1298 (((
1299 This type of sensor will output a low signal GND when active.
1300 )))
1301
1302 * (((
1303 Connect sensor’s output to DI1-
1304 )))
1305 * (((
1306 Connect sensor’s VCC to DI1+.
1307 )))
1308
1309 (((
1310 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1311 )))
1312
1313 (((
1314 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1315 )))
1316
1317 (((
1318 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.
1319 )))
1320
1321 (((
1322
1323 )))
1324
1325 (((
1326 **Example2**: Connect to a High active sensor.
1327 )))
1328
1329 (((
1330 This type of sensor will output a high signal (example 24v) when active.
1331 )))
1332
1333 * (((
1334 Connect sensor’s output to DI1+
1335 )))
1336 * (((
1337 Connect sensor’s GND DI1-.
1338 )))
1339
1340 (((
1341 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1342 )))
1343
1344 (((
1345 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1346 )))
1347
1348 (((
1349 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.
1350 )))
1351
1352 (((
1353
1354 )))
1355
1356 (((
1357 **Example3**: Connect to a 220v high active sensor.
1358 )))
1359
1360 (((
1361 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1362 )))
1363
1364 * (((
1365 Connect sensor’s output to DI1+ with a serial 50K resistor
1366 )))
1367 * (((
1368 Connect sensor’s GND DI1-.
1369 )))
1370
1371 (((
1372 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1373 )))
1374
1375 (((
1376 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1377 )))
1378
1379 (((
1380 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.
1381 )))
1382
1383
1384 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1385
1386 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1387
1388 [[image:1653357531600-905.png]]
1389
1390
1391 === 3.6.4 Analog Input Interface ===
1392
1393 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:
1394
1395 **AC2 = (IN2 voltage )/12**
1396
1397 [[image:1653357592296-182.png]]
1398
1399 Example to connect a 4~~20mA sensor
1400
1401 We take the wind speed sensor as an example for reference only.
1402
1403 Specifications of the wind speed sensor:
1404
1405 Red:12~~24v
1406
1407 Yellow:4~~20mA
1408
1409 Black:GND
1410
1411
1412 Connection diagram:
1413
1414 [[image:1653357640609-758.png]]
1415
1416 [[image:1653357648330-671.png||height="155" width="733"]]
1417
1418
1419 === 3.6.5 Relay Output ===
1420
1421 (((
1422 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:
1423 )))
1424
1425 [[image:image-20220524100215-9.png]]
1426
1427 [[image:image-20220524100215-10.png||height="382" width="723"]]
1428
1429
1430 == 3.7 LEDs Indicators ==
1431
1432 [[image:image-20220524100748-11.png]]
1433
1434
1435 = 4. Use AT Command =
1436
1437 == 4.1 Access AT Command ==
1438
1439 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.
1440
1441 [[image:1653358238933-385.png]]
1442
1443 (((
1444 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:
1445 )))
1446
1447 [[image:1653358355238-883.png]]
1448
1449 (((
1450 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/]]
1451 )))
1452
1453 (((
1454 AT+<CMD>?        : Help on <CMD>
1455 )))
1456
1457 (((
1458 AT+<CMD>         : Run <CMD>
1459 )))
1460
1461 (((
1462 AT+<CMD>=<value> : Set the value
1463 )))
1464
1465 (((
1466 AT+<CMD>=?       : Get the value
1467 )))
1468
1469 (((
1470 ATZ: Trig a reset of the MCU
1471 )))
1472
1473 (((
1474 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1475 )))
1476
1477 (((
1478 AT+DEUI: Get or Set the Device EUI
1479 )))
1480
1481 (((
1482 AT+DADDR: Get or Set the Device Address
1483 )))
1484
1485 (((
1486 AT+APPKEY: Get or Set the Application Key
1487 )))
1488
1489 (((
1490 AT+NWKSKEY: Get or Set the Network Session Key
1491 )))
1492
1493 (((
1494 AT+APPSKEY: Get or Set the Application Session Key
1495 )))
1496
1497 (((
1498 AT+APPEUI: Get or Set the Application EUI
1499 )))
1500
1501 (((
1502 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1503 )))
1504
1505 (((
1506 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1507 )))
1508
1509 (((
1510 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1511 )))
1512
1513 (((
1514 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1515 )))
1516
1517 (((
1518 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1519 )))
1520
1521 (((
1522 AT+RX2FQ: Get or Set the Rx2 window frequency
1523 )))
1524
1525 (((
1526 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1527 )))
1528
1529 (((
1530 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1531 )))
1532
1533 (((
1534 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1535 )))
1536
1537 (((
1538 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1539 )))
1540
1541 (((
1542 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1543 )))
1544
1545 (((
1546 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1547 )))
1548
1549 (((
1550 AT+NWKID: Get or Set the Network ID
1551 )))
1552
1553 (((
1554 AT+FCU: Get or Set the Frame Counter Uplink
1555 )))
1556
1557 (((
1558 AT+FCD: Get or Set the Frame Counter Downlink
1559 )))
1560
1561 (((
1562 AT+CLASS: Get or Set the Device Class
1563 )))
1564
1565 (((
1566 AT+JOIN: Join network
1567 )))
1568
1569 (((
1570 AT+NJS: Get OTAA Join Status
1571 )))
1572
1573 (((
1574 AT+SENDB: Send hexadecimal data along with the application port
1575 )))
1576
1577 (((
1578 AT+SEND: Send text data along with the application port
1579 )))
1580
1581 (((
1582 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1583 )))
1584
1585 (((
1586 AT+RECV: Print last received data in raw format
1587 )))
1588
1589 (((
1590 AT+VER: Get current image version and Frequency Band
1591 )))
1592
1593 (((
1594 AT+CFM: Get or Set the confirmation mode (0-1)
1595 )))
1596
1597 (((
1598 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1599 )))
1600
1601 (((
1602 AT+SNR: Get the SNR of the last received packet
1603 )))
1604
1605 (((
1606 AT+RSSI: Get the RSSI of the last received packet
1607 )))
1608
1609 (((
1610 AT+TDC: Get or set the application data transmission interval in ms
1611 )))
1612
1613 (((
1614 AT+PORT: Get or set the application port
1615 )))
1616
1617 (((
1618 AT+DISAT: Disable AT commands
1619 )))
1620
1621 (((
1622 AT+PWORD: Set password, max 9 digits
1623 )))
1624
1625 (((
1626 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1627 )))
1628
1629 (((
1630 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1631 )))
1632
1633 (((
1634 AT+CFG: Print all settings
1635
1636
1637 )))
1638
1639 == 4.2 Common AT Command Sequence ==
1640
1641 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1642
1643 (((
1644 If device has not joined network yet:
1645 )))
1646
1647 (((
1648 (% style="background-color:#dcdcdc" %)123456
1649 )))
1650
1651 (((
1652 (% style="background-color:#dcdcdc" %)AT+FDR
1653 )))
1654
1655 (((
1656 (% style="background-color:#dcdcdc" %)123456
1657 )))
1658
1659 (((
1660 (% style="background-color:#dcdcdc" %)AT+NJM=0
1661 )))
1662
1663 (((
1664 (% style="background-color:#dcdcdc" %)ATZ
1665 )))
1666
1667
1668 (((
1669 If device already joined network:
1670 )))
1671
1672 (((
1673 (% style="background-color:#dcdcdc" %)AT+NJM=0
1674 )))
1675
1676 (((
1677 (% style="background-color:#dcdcdc" %)ATZ
1678
1679
1680 )))
1681
1682 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1683
1684 (((
1685 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1686 )))
1687
1688 (((
1689 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1690 )))
1691
1692 (((
1693 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1694 )))
1695
1696 (((
1697 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1698 )))
1699
1700 (((
1701 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1702 )))
1703
1704 (((
1705 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1706 )))
1707
1708 (((
1709 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1710 )))
1711
1712 (((
1713 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1714 )))
1715
1716 (((
1717 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1718 )))
1719
1720 (((
1721 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1722 )))
1723
1724 (((
1725 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1726 )))
1727
1728 (((
1729 (% 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.
1730 )))
1731
1732 (((
1733 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1734 )))
1735
1736 (((
1737 (% style="color:red" %)**Note:**
1738 )))
1739
1740 (((
1741 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1742 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1743 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.
1744 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
1745 )))
1746
1747 (((
1748 [[image:1653359097980-169.png||height="188" width="729"]]
1749 )))
1750
1751 (((
1752
1753 )))
1754
1755 === 4.2.3 Change to Class A ===
1756
1757 If sensor JOINED
1758 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1759 ATZ
1760
1761
1762 = 5. FAQ =
1763
1764 == 5.1 How to upgrade the image? ==
1765
1766 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1767
1768 * Support new features
1769 * For bug fix
1770 * Change LoRaWAN bands.
1771 Below shows the hardware connection for how to upload an image to the LT:
1772 * [[image:1653359603330-121.png]]
1773
1774 (((
1775 **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]].
1776 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1777 **Step3: **Open flashloader; choose the correct COM port to update.
1778 **For LT-22222-L**:
1779 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.
1780 )))
1781
1782 [[image:image-20220524103407-12.png]]
1783
1784 [[image:image-20220524103429-13.png]]
1785
1786 [[image:image-20220524104033-15.png]]
1787
1788 (% 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:
1789
1790 [[image:1653360054704-518.png||height="186" width="745"]]
1791
1792
1793 (((
1794 (((
1795 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1796 )))
1797 )))
1798
1799 (((
1800 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1801
1802
1803 )))
1804
1805 (((
1806 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1807 )))
1808
1809 (((
1810 (((
1811 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1812 )))
1813 )))
1814
1815 (((
1816 (((
1817 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1818 )))
1819 )))
1820
1821 (((
1822 (% 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.
1823 )))
1824
1825 (((
1826 [[image:1653360231087-571.png||height="401" width="727"]]
1827 )))
1828
1829 (((
1830 (% 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.
1831 )))
1832
1833 (((
1834 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1835 )))
1836
1837 (((
1838 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1839 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1840 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1841 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1842 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1843 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1844 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1845 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1846 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1847 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1848 )))
1849
1850 (((
1851 As shown in below:
1852 )))
1853
1854 [[image:1653360498588-932.png||height="485" width="726"]]
1855
1856
1857 == 5.4 Can I see counting event in Serial? ==
1858
1859 (((
1860 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.
1861
1862
1863 )))
1864
1865 (((
1866 = 6. Trouble Shooting =
1867 )))
1868
1869 (((
1870 (((
1871 == 6.1 Downlink doesn’t work, how to solve it? ==
1872 )))
1873 )))
1874
1875 (((
1876 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1877
1878
1879 )))
1880
1881 (((
1882 == 6.2 Have trouble to upload image. ==
1883 )))
1884
1885 (((
1886 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1887 )))
1888
1889 (((
1890
1891 )))
1892
1893 (((
1894 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1895 )))
1896
1897 (((
1898 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1899 )))
1900
1901 (((
1902
1903 )))
1904
1905 (((
1906 = 7. Order Info =
1907 )))
1908
1909 (((
1910 (((
1911 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1912 )))
1913 )))
1914
1915 (((
1916 (((
1917 (% style="color:#4f81bd" %)**XXX:**
1918 )))
1919 )))
1920
1921 (((
1922 * (((
1923 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1924 )))
1925 )))
1926
1927 (((
1928 * (((
1929 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1930 )))
1931 )))
1932
1933 (((
1934 * (((
1935 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1936 )))
1937 )))
1938
1939 (((
1940 * (((
1941 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1942 )))
1943 )))
1944
1945 (((
1946 * (((
1947 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1948 )))
1949 )))
1950
1951 (((
1952 * (((
1953 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1954 )))
1955 )))
1956
1957 (((
1958 * (((
1959 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1960 )))
1961 )))
1962
1963 (((
1964 * (((
1965 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1966 )))
1967 )))
1968
1969 (((
1970 * (((
1971 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1972
1973
1974 )))
1975
1976 = 8. Packing Info =
1977 )))
1978
1979 (((
1980 (((
1981 **Package Includes**:
1982 )))
1983 )))
1984
1985 (((
1986 (((
1987 * LT-22222-L I/O Controller x 1
1988 * Stick Antenna for LoRa RF part x 1
1989 * Bracket for controller x1
1990 * Program cable x 1
1991 )))
1992 )))
1993
1994 (((
1995 (((
1996 **Dimension and weight**:
1997 )))
1998 )))
1999
2000 (((
2001 (((
2002 * Device Size: 13.5 x 7 x 3 cm
2003 * Device Weight: 105g
2004 * Package Size / pcs : 14.5 x 8 x 5 cm
2005 * Weight / pcs : 170g
2006
2007
2008 )))
2009 )))
2010
2011 (((
2012 = 9. Support =
2013 )))
2014
2015 * (((
2016 (((
2017 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.
2018 )))
2019 )))
2020 * (((
2021 (((
2022 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
2023 )))
2024 )))
2025
2026 (((
2027 (((
2028 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2029
2030
2031 )))
2032
2033 (((
2034 = 10. Reference​​​​​ =
2035
2036 * Product Page:
2037
2038 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]]
2039
2040 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2041 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2042 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2043 )))
2044 )))
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