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Version 76.1 by Edwin Chen on 2022/06/02 15:20
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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 == 1.4  Applications ==
171
172 * Smart Buildings & Home Automation
173 * Logistics and Supply Chain Management
174 * Smart Metering
175 * Smart Agriculture
176 * Smart Cities
177 * Smart Factory
178
179 == 1.5 Hardware Variants ==
180
181 (% border="1" style="background-color:#f7faff; width:500px" %)
182 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
183 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
184 * 2 x Digital Input (Bi-direction)
185 * 2 x Digital Output
186 * 2 x Relay Output (5A@250VAC / 30VDC)
187 * 2 x 0~~20mA Analog Input (res:0.01mA)
188 * 2 x 0~~30V Analog Input (res:0.01v)
189 * 1 x Counting Port
190 )))
191
192 = 2. Power ON Device =
193
194 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.
195
196 (((
197 PWR will on when device is properly powered.
198 )))
199
200 [[image:1653297104069-180.png]]
201
202
203 = 3. Operation Mode =
204
205 == 3.1 How it works? ==
206
207 (((
208 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. 
209 )))
210
211 (((
212 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.
213
214
215 )))
216
217 == 3.2 Example to join LoRaWAN network ==
218
219 (((
220 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. 
221 )))
222
223 [[image:image-20220523172350-1.png||height="266" width="864"]]
224
225 (((
226 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:
227 )))
228
229 (((
230 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
231 )))
232
233 (((
234 Each LT is shipped with a sticker with the default device EUI as below:
235 )))
236
237 [[image:1653297924498-393.png]]
238
239 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
240
241 Add APP EUI in the application.
242
243 [[image:1653297955910-247.png||height="321" width="716"]]
244
245
246 Add APP KEY and DEV EUI
247
248 [[image:1653298023685-319.png]]
249
250
251 (((
252 **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.
253 )))
254
255 [[image:1653298044601-602.png||height="405" width="709"]]
256
257
258 == 3.3 Uplink Payload ==
259
260 There are five working modes + one interrupt mode on LT for different type application:
261
262 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
263 * **MOD2**: Double DI Counting + DO + RO
264 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
265 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
266 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
267 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
268
269 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
270
271 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
272
273 [[image:image-20220523174024-3.png]]
274
275 (((
276 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
277 )))
278
279 [[image:image-20220523174254-4.png]]
280
281 * RO is for relay. ROx=1 : close，ROx=0 always open.
282 * DI is for digital input. DIx=1: high or float, DIx=0: low.
283 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
284
285 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
286
287 For example if payload is: [[image:image-20220523175847-2.png]]
288
289 **The value for the interface is:  **
290
291 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
292
293 AVI2 channel voltage is 0x04AC/1000=1.196V
294
295 ACI1 channel current is 0x1310/1000=4.880mA
296
297 ACI2 channel current is 0x1300/1000=4.864mA
298
299 The last byte 0xAA= 10101010(B) means
300
301 * [1] RO1 relay channel is close and the RO1 LED is ON.
302 * [0] RO2 relay channel is open and RO2 LED is OFF;
303
304 **LT22222-L:**
305
306 * [1] DI2 channel is high input and DI2 LED is ON;
307 * [0] DI1 channel is low input;
308
309 * [0] DO3 channel output state
310 ** DO3 is float in case no load between DO3 and V+.;
311 ** DO3 is high in case there is load between DO3 and V+.
312 ** DO3 LED is off in both case
313 * [1] DO2 channel output is low and DO2 LED is ON.
314 * [0] DO1 channel output state
315 ** DO1 is float in case no load between DO1 and V+.;
316 ** DO1 is high in case there is load between DO1 and V+.
317 ** DO1 LED is off in both case
318
319 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
320
321 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
322
323 (((
324 Total : 11 bytes payload
325 )))
326
327 [[image:image-20220523180452-3.png]]
328
329 (((
330 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
331 )))
332
333 [[image:image-20220523180506-4.png]]
334
335 * RO is for relay. ROx=1 : close，ROx=0 always open.
336 * FIRST: Indicate this is the first packet after join network.
337 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
338
339 (((
340 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
341 )))
342
343 (((
344 **To use counting mode, please run:**
345 )))
346
347 (% class="box infomessage" %)
348 (((
349 (((
350 **AT+MOD=2**
351 )))
352 )))
353
354 (% class="box infomessage" %)
355 (((
356 (((
357 **ATZ**
358 )))
359 )))
360
361 (((
362 (% style="color:#4f81bd" %)**AT Commands for counting:**
363 )))
364
365 (((
366 **For LT22222-L:**
367 )))
368
369 (% class="box infomessage" %)
370 (((
371 (((
372 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
373 )))
374 )))
375
376 (% class="box infomessage" %)
377 (((
378 (((
379 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
380 )))
381 )))
382
383 (% class="box infomessage" %)
384 (((
385 (((
386 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
387 )))
388 )))
389
390 (% class="box infomessage" %)
391 (((
392 (((
393 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
394 )))
395 )))
396
397 (% class="box infomessage" %)
398 (((
399 (((
400 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
401 )))
402 )))
403
404 (% class="box infomessage" %)
405 (((
406 (((
407 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
408 )))
409 )))
410
411
412 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
413
414 **LT22222-L**: This mode the DI1 is used as a counting pin.
415
416 [[image:image-20220523181246-5.png]]
417
418 (((
419 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
420 )))
421
422 [[image:image-20220523181301-6.png]]
423
424 * RO is for relay. ROx=1 : close，ROx=0 always open.
425 * FIRST: Indicate this is the first packet after join network.
426 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
427
428 (((
429 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
430 )))
431
432 (((
433 **To use counting mode, please run:**
434 )))
435
436 (% class="box infomessage" %)
437 (((
438 (((
439 **AT+MOD=3**
440 )))
441 )))
442
443 (% class="box infomessage" %)
444 (((
445 (((
446 **ATZ**
447 )))
448 )))
449
450 (((
451 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
452
453
454 )))
455
456 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
457
458 **LT22222-L**: This mode the DI1 is used as a counting pin.
459
460 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.
461
462 [[image:image-20220523181903-8.png]]
463
464 (((
465 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
466 )))
467
468 [[image:image-20220523181727-7.png]]
469
470 * RO is for relay. ROx=1 : close，ROx=0 always open.
471 * FIRST: Indicate this is the first packet after join network.
472 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
473
474 (((
475 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
476 )))
477
478 (((
479 **To use this mode, please run:**
480 )))
481
482 (% class="box infomessage" %)
483 (((
484 (((
485 **AT+MOD=4**
486 )))
487 )))
488
489 (% class="box infomessage" %)
490 (((
491 (((
492 **ATZ**
493 )))
494 )))
495
496 (((
497
498 )))
499
500 (((
501 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
502 )))
503
504 (((
505 **Plus below command for AVI1 Counting:**
506 )))
507
508 (% class="box infomessage" %)
509 (((
510 (((
511 **AT+SETCNT=3,60   (set AVI Count to 60)**
512 )))
513 )))
514
515 (% class="box infomessage" %)
516 (((
517 (((
518 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
519 )))
520 )))
521
522 (% class="box infomessage" %)
523 (((
524 (((
525 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
526 )))
527 )))
528
529 (% class="box infomessage" %)
530 (((
531 (((
532 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
533 )))
534 )))
535
536
537 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
538
539 **LT22222-L**: This mode the DI1 is used as a counting pin.
540
541 [[image:image-20220523182334-9.png]]
542
543 (((
544 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
545 )))
546
547 * RO is for relay. ROx=1 : close，ROx=0 always open.
548 * FIRST: Indicate this is the first packet after join network.
549 * (((
550 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
551 )))
552
553 (((
554 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
555 )))
556
557 (((
558 **To use this mode, please run:**
559 )))
560
561 (% class="box infomessage" %)
562 (((
563 (((
564 **AT+MOD=5**
565 )))
566 )))
567
568 (% class="box infomessage" %)
569 (((
570 (((
571 **ATZ**
572 )))
573 )))
574
575 (((
576 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
577
578
579 )))
580
581 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
582
583 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
584
585 For example, if user has configured below commands:
586
587 * **AT+MOD=1 ** **~-~->** The normal working mode
588 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
589
590 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
591
592 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
593 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.**
594
595 **AT Command to set Trigger Condition**:
596
597 (% style="color:#4f81bd" %)**Trigger base on voltage**:
598
599 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
600
601 **Example:**
602
603 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)
604
605 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
606
607
608 (% style="color:#4f81bd" %)**Trigger base on current**:
609
610 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
611
612 **Example:**
613
614 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
615
616
617 (% style="color:#4f81bd" %)**Trigger base on DI status**:
618
619 DI status trigger Flag.
620
621 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
622
623 **Example:**
624
625 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
626
627
628 **Downlink Command to set Trigger Condition**
629
630 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
631
632 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
633
634 AA: Code for this downlink Command:
635
636 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
637
638 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
639
640 yy2 yy2: AC1 or AV1 high limit.
641
642 yy3 yy3: AC2 or AV2 low limit.
643
644 Yy4 yy4: AC2 or AV2 high limit.
645
646 **Example1**: AA 00 13 88 00 00 00 00 00 00
647
648 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
649
650 **Example2**: AA 02 01 00
651
652 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
653
654 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
655
656 MOD6 Payload : total 11 bytes payload
657
658 [[image:image-20220524085923-1.png]]
659
660 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
661
662 [[image:image-20220524090106-2.png]]
663
664 * Each bits shows if the corresponding trigger has been configured.
665
666 **Example:**
667
668 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
669
670
671 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
672
673 [[image:image-20220524090249-3.png]]
674
675 * Each bits shows which status has been trigger on this uplink.
676
677 **Example:**
678
679 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
680
681
682 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
683
684 [[image:image-20220524090456-4.png]]
685
686 * Each bits shows which status has been trigger on this uplink.
687
688 **Example:**
689
690 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
691
692 00000101: Means both DI1 and DI2 trigger are enabled.
693
694
695 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
696
697 Downlink command to poll MOD6 status:
698
699 **AB 06**
700
701 When device got this command, it will send the MOD6 payload.
702
703
704 === 3.3.7 Payload Decoder ===
705
706 (((
707 **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/]]
708
709
710 )))
711
712 == 3.4 ​Configure LT via AT or Downlink ==
713
714 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
715
716 (((
717 There are two kinds of Commands:
718 )))
719
720 * (% 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]]
721
722 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
723
724 === 3.4.1 Common Commands ===
725
726 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]]
727
728
729 === 3.4.2 Sensor related commands ===
730
731 ==== 3.4.2.1 Set Transmit Interval ====
732
733 Set device uplink interval.
734
735 * AT Command:
736
737 (% class="box infomessage" %)
738 (((
739 **AT+TDC=N **
740 )))
741
742 **Example: **AT+TDC=30000. Means set interval to 30 seconds
743
744 * Downlink Payload (prefix 0x01):
745
746 (% class="box infomessage" %)
747 (((
748 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
749 )))
750
751
752 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
753
754 Set work mode.
755
756 * AT Command:
757
758 (% class="box infomessage" %)
759 (((
760 **AT+MOD=N  **
761 )))
762
763 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
764
765 * Downlink Payload (prefix 0x0A):
766
767 (% class="box infomessage" %)
768 (((
769 **0x0A aa     ~/~/ Same as AT+MOD=aa**
770 )))
771
772
773 ==== 3.4.2.3 Poll an uplink ====
774
775 * AT Command:
776
777 There is no AT Command to poll uplink
778
779 * Downlink Payload (prefix 0x08):
780
781 (% class="box infomessage" %)
782 (((
783 **0x08 FF     ~/~/ Poll an uplink,**
784 )))
785
786 **Example**: 0x08FF, ask device to send an Uplink
787
788
789 ==== 3.4.2.4 Enable Trigger Mode ====
790
791 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
792
793 * AT Command:
794
795 (% class="box infomessage" %)
796 (((
797 **AT+ADDMOD6=1 or 0**
798 )))
799
800 1: Enable Trigger Mode
801
802 0: Disable Trigger Mode
803
804 * Downlink Payload (prefix 0x0A 06):
805
806 (% class="box infomessage" %)
807 (((
808 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
809 )))
810
811
812 ==== 3.4.2.5 Poll trigger settings ====
813
814 Poll trigger settings,
815
816 * AT Command:
817
818 There is no AT Command for this feature.
819
820 * Downlink Payload (prefix 0x AB 06):
821
822 (% class="box infomessage" %)
823 (((
824 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
825 )))
826
827
828 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
829
830 Enable Disable DI1/DI2/DI2 as trigger,
831
832 * AT Command:
833
834 (% class="box infomessage" %)
835 (((
836 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
837 )))
838
839 **Example:**
840
841 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
842
843 * Downlink Payload (prefix 0xAA 02):
844
845 (% class="box infomessage" %)
846 (((
847 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
848 )))
849
850
851 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
852
853 Set DI1 or DI3(for LT-33222-L) trigger.
854
855 * AT Command:
856
857 (% class="box infomessage" %)
858 (((
859 **AT+TRIG1=a,b**
860 )))
861
862 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
863
864 b : delay timing.
865
866 **Example:**
867
868 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
869
870 * Downlink Payload (prefix 0x09 01 ):
871
872 (% class="box infomessage" %)
873 (((
874 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
875 )))
876
877
878 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
879
880 Set DI2 trigger.
881
882 * AT Command:
883
884 (% class="box infomessage" %)
885 (((
886 **AT+TRIG2=a,b**
887 )))
888
889 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
890
891 b : delay timing.
892
893 **Example:**
894
895 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
896
897 * Downlink Payload (prefix 0x09 02 ):
898
899 (% class="box infomessage" %)
900 (((
901 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
902 )))
903
904
905 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
906
907 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
908
909 * AT Command:
910
911 (% class="box infomessage" %)
912 (((
913 **AT+ACLIM. **
914 )))
915
916 * Downlink Payload (prefix 0xAA 01 ):
917
918 (% class="box infomessage" %)
919 (((
920 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
921 )))
922
923
924 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
925
926 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
927
928 * AT Command:
929
930 (% class="box infomessage" %)
931 (((
932 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
933 )))
934
935 * Downlink Payload (prefix 0xAA 00 ):
936
937 (% class="box infomessage" %)
938 (((
939 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
940 )))
941
942
943 ==== 3.4.2.11 Trigger – Set minimum interval ====
944
945 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
946
947 * AT Command:
948
949 (% class="box infomessage" %)
950 (((
951 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
952 )))
953
954 * Downlink Payload (prefix 0xAC ):
955
956 (% class="box infomessage" %)
957 (((
958 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
959 )))
960
961
962 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
963
964 * AT Command:
965
966 There is no AT Command to control Digital Output
967
968 * Downlink Payload (prefix 0x02):
969
970 (% class="box infomessage" %)
971 (((
972 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
973 )))
974
975 (((
976 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
977 )))
978
979 (((
980 01: Low,  00: High ,  11: No action
981 )))
982
983 [[image:image-20220524092754-5.png]]
984
985 (((
986 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
987 )))
988
989 (((
990 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
991 )))
992
993
994 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
995
996 * AT Command:
997
998 There is no AT Command to control Digital Output
999
1000 * Downlink Payload (prefix 0xA9):
1001
1002 (% class="box infomessage" %)
1003 (((
1004 (((
1005 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1006 )))
1007 )))
1008
1009 This is to control the digital output time of DO pin. Include four bytes:
1010
1011 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1012
1013 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1014
1015 01: DO pins will change back to original state after timeout.
1016
1017 00: DO pins will change to an inverter state after timeout 
1018
1019 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1020
1021 [[image:image-20220524093238-6.png]]
1022
1023 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1024
1025 [[image:image-20220524093328-7.png]]
1026
1027 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1028
1029 [[image:image-20220524093351-8.png]]
1030
1031 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1032
1033 Latching time. Unit: ms
1034
1035 Device will upload a packet if downlink code executes successfully.
1036
1037 **Example payload:**
1038
1039 **~1. A9 01 01 01 01 07 D0**
1040
1041 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1042
1043 **2. A9 01 00 01 11 07 D0**
1044
1045 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1046
1047 **3. A9 00 00 00 00 07 D0**
1048
1049 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1050
1051 **4. A9 00 11 01 00 07 D0**
1052
1053 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
1054
1055
1056 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1057
1058 * AT Command:
1059
1060 There is no AT Command to control Relay Output
1061
1062 * Downlink Payload (prefix 0x03):
1063
1064 (% class="box infomessage" %)
1065 (((
1066 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1067 )))
1068
1069 (((
1070 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1071 )))
1072
1073 (((
1074 01: Close ,  00: Open , 11: No action
1075 )))
1076
1077 (((
1078 [[image:image-20220524093724-9.png]]
1079 )))
1080
1081 Device will upload a packet if downlink code executes successfully.
1082
1083
1084 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1085
1086 * AT Command:
1087
1088 There is no AT Command to control Relay Output
1089
1090 * Downlink Payload (prefix 0x05):
1091
1092 (% class="box infomessage" %)
1093 (((
1094 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1095 )))
1096
1097 This is to control the relay output time of relay. Include four bytes:
1098
1099 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1100
1101 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1102
1103 01: Relays will change back to original state after timeout.
1104
1105 00: Relays will change to an inverter state after timeout
1106
1107 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1108
1109 [[image:image-20220524093831-10.png]]
1110
1111 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1112
1113 Device will upload a packet if downlink code executes successfully.
1114
1115 **Example payload:**
1116
1117 **~1. 05 01 11 07 D0**
1118
1119 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1120
1121 **2. 05 01 10 07 D0**
1122
1123 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1124
1125 **3. 05 00 01 07 D0**
1126
1127 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1128
1129 **4. 05 00 00 07 D0**
1130
1131 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1132
1133
1134 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1135
1136 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1137
1138 * AT Command:
1139
1140 (% class="box infomessage" %)
1141 (((
1142 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1143 )))
1144
1145 * Downlink Payload (prefix 0xA5):
1146
1147 (% class="box infomessage" %)
1148 (((
1149 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1150 )))
1151
1152
1153 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1154
1155 * AT Command:
1156
1157 (% class="box infomessage" %)
1158 (((
1159 **AT+SETCNT=aa,(bb cc dd ee) **
1160 )))
1161
1162 aa: 1: Set count1,
1163
1164 2: Set count2,
1165
1166 3: Set AV1 count
1167
1168 Bb cc dd ee: number to be set
1169
1170 * Downlink Payload (prefix 0xA8):
1171
1172 (% class="box infomessage" %)
1173 (((
1174 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1175 )))
1176
1177
1178 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1179
1180 Clear counting for counting mode
1181
1182 * AT Command:
1183
1184 (% class="box infomessage" %)
1185 (((
1186 **AT+CLRCOUNT ~/~/ clear all counting**
1187 )))
1188
1189 * Downlink Payload (prefix 0xA6):
1190
1191 (% class="box infomessage" %)
1192 (((
1193 **0x A6 01     ~/~/ clear all counting,**
1194 )))
1195
1196
1197 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1198
1199 * AT Command:
1200
1201 (% class="box infomessage" %)
1202 (((
1203 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1204 )))
1205
1206 * Downlink Payload (prefix 0xA7):
1207
1208 (% class="box infomessage" %)
1209 (((
1210 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1211 )))
1212
1213 (((
1214 range: aa bb cc:0 to 16777215,  (unit:second)
1215
1216
1217 )))
1218
1219 == 3.5 Integrate with Mydevice ==
1220
1221 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:
1222
1223 (((
1224 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1225 )))
1226
1227 (((
1228 **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:
1229 )))
1230
1231 [[image:1653356737703-362.png||height="232" width="732"]]
1232
1233 [[image:image-20220524094641-11.png||height="390" width="723"]]
1234
1235 [[image:image-20220524094641-12.png||height="402" width="718"]]
1236
1237
1238 **Step 3**: Create an account or log in Mydevices.
1239
1240 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1241
1242 Search under The things network
1243
1244 [[image:1653356838789-523.png||height="337" width="740"]]
1245
1246
1247 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1248
1249 [[image:image-20220524094909-1.png||height="335" width="729"]]
1250
1251 [[image:image-20220524094909-2.png||height="337" width="729"]]
1252
1253 [[image:image-20220524094909-3.png||height="338" width="727"]]
1254
1255 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1256
1257 [[image:image-20220524094909-5.png||height="341" width="734"]]
1258
1259
1260 == 3.6 Interface Detail ==
1261
1262 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1263
1264 Support NPN Type sensor
1265
1266 [[image:1653356991268-289.png]]
1267
1268
1269 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1270
1271 (((
1272 The DI port of LT-22222-L can support NPN or PNP output sensor.
1273 )))
1274
1275 (((
1276 (((
1277 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
1278 )))
1279 )))
1280
1281 [[image:1653357170703-587.png]]
1282
1283 (((
1284 (((
1285 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1286 )))
1287 )))
1288
1289 (((
1290
1291 )))
1292
1293 (((
1294 **Example1**: Connect to a Low active sensor.
1295 )))
1296
1297 (((
1298 This type of sensor will output a low signal GND when active.
1299 )))
1300
1301 * (((
1302 Connect sensor’s output to DI1-
1303 )))
1304 * (((
1305 Connect sensor’s VCC to DI1+.
1306 )))
1307
1308 (((
1309 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1310 )))
1311
1312 (((
1313 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1314 )))
1315
1316 (((
1317 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.
1318 )))
1319
1320 (((
1321
1322 )))
1323
1324 (((
1325 **Example2**: Connect to a High active sensor.
1326 )))
1327
1328 (((
1329 This type of sensor will output a high signal (example 24v) when active.
1330 )))
1331
1332 * (((
1333 Connect sensor’s output to DI1+
1334 )))
1335 * (((
1336 Connect sensor’s GND DI1-.
1337 )))
1338
1339 (((
1340 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1341 )))
1342
1343 (((
1344 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1345 )))
1346
1347 (((
1348 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.
1349 )))
1350
1351 (((
1352
1353 )))
1354
1355 (((
1356 **Example3**: Connect to a 220v high active sensor.
1357 )))
1358
1359 (((
1360 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1361 )))
1362
1363 * (((
1364 Connect sensor’s output to DI1+ with a serial 50K resistor
1365 )))
1366 * (((
1367 Connect sensor’s GND DI1-.
1368 )))
1369
1370 (((
1371 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1372 )))
1373
1374 (((
1375 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1376 )))
1377
1378 (((
1379 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.
1380 )))
1381
1382
1383 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1384
1385 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1386
1387 [[image:1653357531600-905.png]]
1388
1389
1390 === 3.6.4 Analog Input Interface ===
1391
1392 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:
1393
1394 **AC2 = (IN2 voltage )/12**
1395
1396 [[image:1653357592296-182.png]]
1397
1398 Example to connect a 4~~20mA sensor
1399
1400 We take the wind speed sensor as an example for reference only.
1401
1402 Specifications of the wind speed sensor:
1403
1404 Red:12~~24v
1405
1406 Yellow:4~~20mA
1407
1408 Black:GND
1409
1410
1411 Connection diagram:
1412
1413 [[image:1653357640609-758.png]]
1414
1415 [[image:1653357648330-671.png||height="155" width="733"]]
1416
1417
1418 === 3.6.5 Relay Output ===
1419
1420 (((
1421 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:
1422 )))
1423
1424 [[image:image-20220524100215-9.png]]
1425
1426 [[image:image-20220524100215-10.png||height="382" width="723"]]
1427
1428
1429 == 3.7 LEDs Indicators ==
1430
1431 [[image:image-20220524100748-11.png]]
1432
1433
1434 = 4. Use AT Command =
1435
1436 == 4.1 Access AT Command ==
1437
1438 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.
1439
1440 [[image:1653358238933-385.png]]
1441
1442 (((
1443 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:
1444 )))
1445
1446 [[image:1653358355238-883.png]]
1447
1448 (((
1449 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/]]
1450 )))
1451
1452 (((
1453 AT+<CMD>?        : Help on <CMD>
1454 )))
1455
1456 (((
1457 AT+<CMD>         : Run <CMD>
1458 )))
1459
1460 (((
1461 AT+<CMD>=<value> : Set the value
1462 )))
1463
1464 (((
1465 AT+<CMD>=?       : Get the value
1466 )))
1467
1468 (((
1469 ATZ: Trig a reset of the MCU
1470 )))
1471
1472 (((
1473 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1474 )))
1475
1476 (((
1477 AT+DEUI: Get or Set the Device EUI
1478 )))
1479
1480 (((
1481 AT+DADDR: Get or Set the Device Address
1482 )))
1483
1484 (((
1485 AT+APPKEY: Get or Set the Application Key
1486 )))
1487
1488 (((
1489 AT+NWKSKEY: Get or Set the Network Session Key
1490 )))
1491
1492 (((
1493 AT+APPSKEY: Get or Set the Application Session Key
1494 )))
1495
1496 (((
1497 AT+APPEUI: Get or Set the Application EUI
1498 )))
1499
1500 (((
1501 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1502 )))
1503
1504 (((
1505 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1506 )))
1507
1508 (((
1509 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1510 )))
1511
1512 (((
1513 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1514 )))
1515
1516 (((
1517 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1518 )))
1519
1520 (((
1521 AT+RX2FQ: Get or Set the Rx2 window frequency
1522 )))
1523
1524 (((
1525 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1526 )))
1527
1528 (((
1529 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1530 )))
1531
1532 (((
1533 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1534 )))
1535
1536 (((
1537 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1538 )))
1539
1540 (((
1541 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1542 )))
1543
1544 (((
1545 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1546 )))
1547
1548 (((
1549 AT+NWKID: Get or Set the Network ID
1550 )))
1551
1552 (((
1553 AT+FCU: Get or Set the Frame Counter Uplink
1554 )))
1555
1556 (((
1557 AT+FCD: Get or Set the Frame Counter Downlink
1558 )))
1559
1560 (((
1561 AT+CLASS: Get or Set the Device Class
1562 )))
1563
1564 (((
1565 AT+JOIN: Join network
1566 )))
1567
1568 (((
1569 AT+NJS: Get OTAA Join Status
1570 )))
1571
1572 (((
1573 AT+SENDB: Send hexadecimal data along with the application port
1574 )))
1575
1576 (((
1577 AT+SEND: Send text data along with the application port
1578 )))
1579
1580 (((
1581 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1582 )))
1583
1584 (((
1585 AT+RECV: Print last received data in raw format
1586 )))
1587
1588 (((
1589 AT+VER: Get current image version and Frequency Band
1590 )))
1591
1592 (((
1593 AT+CFM: Get or Set the confirmation mode (0-1)
1594 )))
1595
1596 (((
1597 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1598 )))
1599
1600 (((
1601 AT+SNR: Get the SNR of the last received packet
1602 )))
1603
1604 (((
1605 AT+RSSI: Get the RSSI of the last received packet
1606 )))
1607
1608 (((
1609 AT+TDC: Get or set the application data transmission interval in ms
1610 )))
1611
1612 (((
1613 AT+PORT: Get or set the application port
1614 )))
1615
1616 (((
1617 AT+DISAT: Disable AT commands
1618 )))
1619
1620 (((
1621 AT+PWORD: Set password, max 9 digits
1622 )))
1623
1624 (((
1625 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1626 )))
1627
1628 (((
1629 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1630 )))
1631
1632 (((
1633 AT+CFG: Print all settings
1634
1635
1636 )))
1637
1638 == 4.2 Common AT Command Sequence ==
1639
1640 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1641
1642 (((
1643 If device has not joined network yet:
1644 )))
1645
1646 (((
1647 (% style="background-color:#dcdcdc" %)123456
1648 )))
1649
1650 (((
1651 (% style="background-color:#dcdcdc" %)AT+FDR
1652 )))
1653
1654 (((
1655 (% style="background-color:#dcdcdc" %)123456
1656 )))
1657
1658 (((
1659 (% style="background-color:#dcdcdc" %)AT+NJM=0
1660 )))
1661
1662 (((
1663 (% style="background-color:#dcdcdc" %)ATZ
1664 )))
1665
1666
1667 (((
1668 If device already joined network:
1669 )))
1670
1671 (((
1672 (% style="background-color:#dcdcdc" %)AT+NJM=0
1673 )))
1674
1675 (((
1676 (% style="background-color:#dcdcdc" %)ATZ
1677
1678
1679 )))
1680
1681 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1682
1683 (((
1684 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1685 )))
1686
1687 (((
1688 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1689 )))
1690
1691 (((
1692 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1693 )))
1694
1695 (((
1696 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1697 )))
1698
1699 (((
1700 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1701 )))
1702
1703 (((
1704 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1705 )))
1706
1707 (((
1708 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1709 )))
1710
1711 (((
1712 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1713 )))
1714
1715 (((
1716 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1717 )))
1718
1719 (((
1720 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1721 )))
1722
1723 (((
1724 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1725 )))
1726
1727 (((
1728 (% 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.
1729 )))
1730
1731 (((
1732 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1733 )))
1734
1735 (((
1736 (% style="color:red" %)**Note:**
1737 )))
1738
1739 (((
1740 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1741 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1742 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.
1743 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
1744 )))
1745
1746 (((
1747 [[image:1653359097980-169.png||height="188" width="729"]]
1748 )))
1749
1750 (((
1751
1752 )))
1753
1754 === 4.2.3 Change to Class A ===
1755
1756 If sensor JOINED
1757 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1758 ATZ
1759
1760
1761 = 5. FAQ =
1762
1763 == 5.1 How to upgrade the image? ==
1764
1765 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1766
1767 * Support new features
1768 * For bug fix
1769 * Change LoRaWAN bands.
1770 Below shows the hardware connection for how to upload an image to the LT:
1771 * [[image:1653359603330-121.png]]
1772
1773 (((
1774 **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]].
1775 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1776 **Step3: **Open flashloader; choose the correct COM port to update.
1777 **For LT-22222-L**:
1778 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.
1779 )))
1780
1781 [[image:image-20220524103407-12.png]]
1782
1783 [[image:image-20220524103429-13.png]]
1784
1785 [[image:image-20220524104033-15.png]]
1786
1787 (% 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:
1788
1789 [[image:1653360054704-518.png||height="186" width="745"]]
1790
1791
1792 (((
1793 (((
1794 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1795 )))
1796 )))
1797
1798 (((
1799 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1800
1801
1802 )))
1803
1804 (((
1805 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1806 )))
1807
1808 (((
1809 (((
1810 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1811 )))
1812 )))
1813
1814 (((
1815 (((
1816 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1817 )))
1818 )))
1819
1820 (((
1821 (% 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.
1822 )))
1823
1824 (((
1825 [[image:1653360231087-571.png||height="401" width="727"]]
1826 )))
1827
1828 (((
1829 (% 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.
1830 )))
1831
1832 (((
1833 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1834 )))
1835
1836 (((
1837 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1838 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1839 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1840 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1841 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1842 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1843 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1844 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1845 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1846 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1847 )))
1848
1849 (((
1850 As shown in below:
1851 )))
1852
1853 [[image:1653360498588-932.png||height="485" width="726"]]
1854
1855
1856 == 5.4 Can I see counting event in Serial? ==
1857
1858 (((
1859 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.
1860
1861
1862 == 5.5 Can i use point to point communication for LT-22222-L? ==
1863
1864 Yes, please refer [[Point to Point Communication>> Point to Point Communication of LT-22222-L]]
1865
1866
1867 )))
1868
1869 (((
1870 = 6. Trouble Shooting =
1871 )))
1872
1873 (((
1874 (((
1875 == 6.1 Downlink doesn’t work, how to solve it? ==
1876 )))
1877 )))
1878
1879 (((
1880 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1881
1882
1883 )))
1884
1885 (((
1886 == 6.2 Have trouble to upload image. ==
1887 )))
1888
1889 (((
1890 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1891 )))
1892
1893 (((
1894
1895 )))
1896
1897 (((
1898 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1899 )))
1900
1901 (((
1902 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1903 )))
1904
1905 (((
1906
1907 )))
1908
1909 (((
1910 = 7. Order Info =
1911 )))
1912
1913 (((
1914 (((
1915 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1916 )))
1917 )))
1918
1919 (((
1920 (((
1921 (% style="color:#4f81bd" %)**XXX:**
1922 )))
1923 )))
1924
1925 (((
1926 * (((
1927 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1928 )))
1929 )))
1930
1931 (((
1932 * (((
1933 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1934 )))
1935 )))
1936
1937 (((
1938 * (((
1939 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1940 )))
1941 )))
1942
1943 (((
1944 * (((
1945 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1946 )))
1947 )))
1948
1949 (((
1950 * (((
1951 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1952 )))
1953 )))
1954
1955 (((
1956 * (((
1957 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1958 )))
1959 )))
1960
1961 (((
1962 * (((
1963 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1964 )))
1965 )))
1966
1967 (((
1968 * (((
1969 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1970 )))
1971 )))
1972
1973 (((
1974 * (((
1975 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1976
1977
1978 )))
1979
1980 = 8. Packing Info =
1981 )))
1982
1983 (((
1984 (((
1985 **Package Includes**:
1986 )))
1987 )))
1988
1989 (((
1990 (((
1991 * LT-22222-L I/O Controller x 1
1992 * Stick Antenna for LoRa RF part x 1
1993 * Bracket for controller x1
1994 * Program cable x 1
1995 )))
1996 )))
1997
1998 (((
1999 (((
2000 **Dimension and weight**:
2001 )))
2002 )))
2003
2004 (((
2005 (((
2006 * Device Size: 13.5 x 7 x 3 cm
2007 * Device Weight: 105g
2008 * Package Size / pcs : 14.5 x 8 x 5 cm
2009 * Weight / pcs : 170g
2010
2011
2012 )))
2013 )))
2014
2015 (((
2016 = 9. Support =
2017 )))
2018
2019 * (((
2020 (((
2021 Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
2022 )))
2023 )))
2024 * (((
2025 (((
2026 Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to
2027 )))
2028 )))
2029
2030 (((
2031 (((
2032 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2033
2034
2035 )))
2036
2037 (((
2038 = 10. Reference​​​​​ =
2039
2040 * Product Page:
2041
2042 LT-22222-L: [[http:~~/~~/www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html]]
2043
2044 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2045 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2046 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2047 )))
2048 )))