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Version 77.13 by Xiaoling on 2022/06/10 08:39
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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
15
16
17 = 1.Introduction =
18
19 == 1.1 What is LT Series I/O Controller ==
20
21 (((
22 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.
23 )))
24
25 (((
26 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.
27 )))
28
29 (((
30 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
31 )))
32
33 (((
34 The use environment includes:
35 )))
36
37 (((
38 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.
39 )))
40
41 (((
42 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
43 )))
44
45 (((
46 [[image:1653295757274-912.png]]
47
48
49 )))
50
51 == 1.2  Specifications ==
52
53 (((
54
55
56 **Hardware System:**
57 )))
58
59 * (((
60 STM32L072CZT6 MCU
61 )))
62 * (((
63 SX1276/78 Wireless Chip 
64 )))
65 * (((
66 (((
67 Power Consumption:
68 )))
69
70 * (((
71 Idle: 4mA@12v
72 )))
73 * (((
74 20dB Transmit: 34mA@12v
75 )))
76 )))
77
78
79 (((
80 **Interface for Model: LT22222-L:**
81 )))
82
83 * (((
84 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
85 )))
86 * (((
87 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
88 )))
89 * (((
90 2 x Relay Output (5A@250VAC / 30VDC)
91 )))
92 * (((
93 2 x 0~~20mA Analog Input (res:0.01mA)
94 )))
95 * (((
96 2 x 0~~30V Analog Input (res:0.01v)
97 )))
98 * (((
99 Power Input 7~~ 24V DC. 
100 )))
101
102
103 (((
104 **LoRa Spec:**
105 )))
106
107 * (((
108 (((
109 Frequency Range:
110 )))
111
112 * (((
113 Band 1 (HF): 862 ~~ 1020 Mhz
114 )))
115 * (((
116 Band 2 (LF): 410 ~~ 528 Mhz
117 )))
118 )))
119 * (((
120 168 dB maximum link budget.
121 )))
122 * (((
123 +20 dBm - 100 mW constant RF output vs.
124 )))
125 * (((
126 +14 dBm high efficiency PA.
127 )))
128 * (((
129 Programmable bit rate up to 300 kbps.
130 )))
131 * (((
132 High sensitivity: down to -148 dBm.
133 )))
134 * (((
135 Bullet-proof front end: IIP3 = -12.5 dBm.
136 )))
137 * (((
138 Excellent blocking immunity.
139 )))
140 * (((
141 Low RX current of 10.3 mA, 200 nA register retention.
142 )))
143 * (((
144 Fully integrated synthesizer with a resolution of 61 Hz.
145 )))
146 * (((
147 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
148 )))
149 * (((
150 Built-in bit synchronizer for clock recovery.
151 )))
152 * (((
153 Preamble detection.
154 )))
155 * (((
156 127 dB Dynamic Range RSSI.
157 )))
158 * (((
159 Automatic RF Sense and CAD with ultra-fast AFC.
160 )))
161 * (((
162 Packet engine up to 256 bytes with CRC.
163
164
165 )))
166
167
168
169 == 1.3 Features ==
170
171 * LoRaWAN Class A & Class C protocol
172 * Optional Customized LoRa Protocol
173 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
174 * AT Commands to change parameters
175 * Remote configure parameters via LoRa Downlink
176 * Firmware upgradable via program port
177 * Counting
178
179
180
181 == 1.4  Applications ==
182
183 * Smart Buildings & Home Automation
184 * Logistics and Supply Chain Management
185 * Smart Metering
186 * Smart Agriculture
187 * Smart Cities
188 * Smart Factory
189
190
191
192 == 1.5 Hardware Variants ==
193
194 (% border="1" style="background-color:#f7faff; width:500px" %)
195 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
196 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
197 * 2 x Digital Input (Bi-direction)
198 * 2 x Digital Output
199 * 2 x Relay Output (5A@250VAC / 30VDC)
200 * 2 x 0~~20mA Analog Input (res:0.01mA)
201 * 2 x 0~~30V Analog Input (res:0.01v)
202 * 1 x Counting Port
203 )))
204
205
206
207 = 2. Power ON Device =
208
209 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.
210
211 (((
212 PWR will on when device is properly powered.
213 )))
214
215 [[image:1653297104069-180.png]]
216
217
218
219 = 3. Operation Mode =
220
221 == 3.1 How it works? ==
222
223 (((
224 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. 
225 )))
226
227 (((
228 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.
229
230
231 )))
232
233
234
235 == 3.2 Example to join LoRaWAN network ==
236
237 (((
238 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. 
239 )))
240
241 [[image:image-20220523172350-1.png||height="266" width="864"]]
242
243 (((
244 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:
245 )))
246
247 (((
248 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
249 )))
250
251 (((
252 Each LT is shipped with a sticker with the default device EUI as below:
253 )))
254
255 [[image:1653297924498-393.png]]
256
257 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
258
259 Add APP EUI in the application.
260
261 [[image:1653297955910-247.png||height="321" width="716"]]
262
263
264 Add APP KEY and DEV EUI
265
266 [[image:1653298023685-319.png]]
267
268
269 (((
270 **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.
271 )))
272
273 [[image:1653298044601-602.png||height="405" width="709"]]
274
275
276
277 == 3.3 Uplink Payload ==
278
279 There are five working modes + one interrupt mode on LT for different type application:
280
281 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
282 * **MOD2**: Double DI Counting + DO + RO
283 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
284 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
285 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
286 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
287
288
289
290 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
291
292 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
293
294 [[image:image-20220523174024-3.png]]
295
296 (((
297 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
298 )))
299
300 [[image:image-20220523174254-4.png]]
301
302 * RO is for relay. ROx=1 : close，ROx=0 always open.
303 * DI is for digital input. DIx=1: high or float, DIx=0: low.
304 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
305
306 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
307
308 For example if payload is: [[image:image-20220523175847-2.png]]
309
310 **The value for the interface is:  **
311
312 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
313
314 AVI2 channel voltage is 0x04AC/1000=1.196V
315
316 ACI1 channel current is 0x1310/1000=4.880mA
317
318 ACI2 channel current is 0x1300/1000=4.864mA
319
320 The last byte 0xAA= 10101010(B) means
321
322 * [1] RO1 relay channel is close and the RO1 LED is ON.
323 * [0] RO2 relay channel is open and RO2 LED is OFF;
324
325
326 **LT22222-L:**
327
328 * [1] DI2 channel is high input and DI2 LED is ON;
329 * [0] DI1 channel is low input;
330
331 * [0] DO3 channel output state
332 ** DO3 is float in case no load between DO3 and V+.;
333 ** DO3 is high in case there is load between DO3 and V+.
334 ** DO3 LED is off in both case
335 * [1] DO2 channel output is low and DO2 LED is ON.
336 * [0] DO1 channel output state
337 ** DO1 is float in case no load between DO1 and V+.;
338 ** DO1 is high in case there is load between DO1 and V+.
339 ** DO1 LED is off in both case
340
341
342
343 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
344
345 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
346
347 (((
348 Total : 11 bytes payload
349 )))
350
351 [[image:image-20220523180452-3.png]]
352
353 (((
354 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
355 )))
356
357 [[image:image-20220523180506-4.png]]
358
359 * RO is for relay. ROx=1 : close，ROx=0 always open.
360 * FIRST: Indicate this is the first packet after join network.
361 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
362
363 (((
364 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
365 )))
366
367 (((
368 **To use counting mode, please run:**
369 )))
370
371 (% class="box infomessage" %)
372 (((
373 (((
374 **AT+MOD=2**
375 )))
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **ATZ**
382 )))
383 )))
384
385 (((
386 (% style="color:#4f81bd" %)**AT Commands for counting:**
387 )))
388
389 (((
390 **For LT22222-L:**
391 )))
392
393 (% class="box infomessage" %)
394 (((
395 (((
396 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
397 )))
398 )))
399
400 (% class="box infomessage" %)
401 (((
402 (((
403 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
404 )))
405 )))
406
407 (% class="box infomessage" %)
408 (((
409 (((
410 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
411 )))
412 )))
413
414 (% class="box infomessage" %)
415 (((
416 (((
417 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
418 )))
419 )))
420
421 (% class="box infomessage" %)
422 (((
423 (((
424 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
425 )))
426 )))
427
428 (% class="box infomessage" %)
429 (((
430 (((
431 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
432 )))
433 )))
434
435
436
437 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
438
439 **LT22222-L**: This mode the DI1 is used as a counting pin.
440
441 [[image:image-20220523181246-5.png]]
442
443 (((
444 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
445 )))
446
447 [[image:image-20220523181301-6.png]]
448
449 * RO is for relay. ROx=1 : close，ROx=0 always open.
450 * FIRST: Indicate this is the first packet after join network.
451 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
452
453 (((
454 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
455 )))
456
457 (((
458 **To use counting mode, please run:**
459 )))
460
461 (% class="box infomessage" %)
462 (((
463 (((
464 **AT+MOD=3**
465 )))
466 )))
467
468 (% class="box infomessage" %)
469 (((
470 (((
471 **ATZ**
472 )))
473 )))
474
475 (((
476 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
477
478
479 )))
480
481 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
482
483 **LT22222-L**: This mode the DI1 is used as a counting pin.
484
485 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.
486
487 [[image:image-20220523181903-8.png]]
488
489 (((
490 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
491 )))
492
493 [[image:image-20220523181727-7.png]]
494
495 * RO is for relay. ROx=1 : close，ROx=0 always open.
496 * FIRST: Indicate this is the first packet after join network.
497 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
498
499 (((
500 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
501 )))
502
503 (((
504 **To use this mode, please run:**
505 )))
506
507 (% class="box infomessage" %)
508 (((
509 (((
510 **AT+MOD=4**
511 )))
512 )))
513
514 (% class="box infomessage" %)
515 (((
516 (((
517 **ATZ**
518 )))
519 )))
520
521 (((
522
523 )))
524
525 (((
526 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
527 )))
528
529 (((
530 **Plus below command for AVI1 Counting:**
531 )))
532
533 (% class="box infomessage" %)
534 (((
535 (((
536 **AT+SETCNT=3,60   (set AVI Count to 60)**
537 )))
538 )))
539
540 (% class="box infomessage" %)
541 (((
542 (((
543 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
544 )))
545 )))
546
547 (% class="box infomessage" %)
548 (((
549 (((
550 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
551 )))
552 )))
553
554 (% class="box infomessage" %)
555 (((
556 (((
557 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
558 )))
559 )))
560
561
562 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
563
564 **LT22222-L**: This mode the DI1 is used as a counting pin.
565
566 [[image:image-20220523182334-9.png]]
567
568 (((
569 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
570 )))
571
572 * RO is for relay. ROx=1 : close，ROx=0 always open.
573 * FIRST: Indicate this is the first packet after join network.
574 * (((
575 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
576 )))
577
578 (((
579 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
580 )))
581
582 (((
583 **To use this mode, please run:**
584 )))
585
586 (% class="box infomessage" %)
587 (((
588 (((
589 **AT+MOD=5**
590 )))
591 )))
592
593 (% class="box infomessage" %)
594 (((
595 (((
596 **ATZ**
597 )))
598 )))
599
600 (((
601 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
602
603
604 )))
605
606 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
607
608 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
609
610 For example, if user has configured below commands:
611
612 * **AT+MOD=1 ** **~-~->** The normal working mode
613 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
614
615 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
616
617 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
618 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.**
619
620 **AT Command to set Trigger Condition**:
621
622 (% style="color:#4f81bd" %)**Trigger base on voltage**:
623
624 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
625
626 **Example:**
627
628 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)
629
630 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
631
632
633 (% style="color:#4f81bd" %)**Trigger base on current**:
634
635 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
636
637 **Example:**
638
639 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
640
641
642 (% style="color:#4f81bd" %)**Trigger base on DI status**:
643
644 DI status trigger Flag.
645
646 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
647
648 **Example:**
649
650 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
651
652
653 **Downlink Command to set Trigger Condition**
654
655 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
656
657 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
658
659 AA: Code for this downlink Command:
660
661 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
662
663 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
664
665 yy2 yy2: AC1 or AV1 high limit.
666
667 yy3 yy3: AC2 or AV2 low limit.
668
669 Yy4 yy4: AC2 or AV2 high limit.
670
671 **Example1**: AA 00 13 88 00 00 00 00 00 00
672
673 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
674
675 **Example2**: AA 02 01 00
676
677 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
678
679 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
680
681 MOD6 Payload : total 11 bytes payload
682
683 [[image:image-20220524085923-1.png]]
684
685 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
686
687 [[image:image-20220524090106-2.png]]
688
689 * Each bits shows if the corresponding trigger has been configured.
690
691 **Example:**
692
693 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
694
695
696 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
697
698 [[image:image-20220524090249-3.png]]
699
700 * Each bits shows which status has been trigger on this uplink.
701
702 **Example:**
703
704 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
705
706
707 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
708
709 [[image:image-20220524090456-4.png]]
710
711 * Each bits shows which status has been trigger on this uplink.
712
713 **Example:**
714
715 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
716
717 00000101: Means both DI1 and DI2 trigger are enabled.
718
719
720 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
721
722 Downlink command to poll MOD6 status:
723
724 **AB 06**
725
726 When device got this command, it will send the MOD6 payload.
727
728
729 === 3.3.7 Payload Decoder ===
730
731 (((
732 **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/]]
733
734
735 )))
736
737 == 3.4 ​Configure LT via AT or Downlink ==
738
739 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
740
741 (((
742 There are two kinds of Commands:
743 )))
744
745 * (% 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]]
746
747 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
748
749 === 3.4.1 Common Commands ===
750
751 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]]
752
753
754 === 3.4.2 Sensor related commands ===
755
756 ==== 3.4.2.1 Set Transmit Interval ====
757
758 Set device uplink interval.
759
760 * AT Command:
761
762 (% class="box infomessage" %)
763 (((
764 **AT+TDC=N **
765 )))
766
767 **Example: **AT+TDC=30000. Means set interval to 30 seconds
768
769 * Downlink Payload (prefix 0x01):
770
771 (% class="box infomessage" %)
772 (((
773 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
774 )))
775
776
777 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
778
779 Set work mode.
780
781 * AT Command:
782
783 (% class="box infomessage" %)
784 (((
785 **AT+MOD=N  **
786 )))
787
788 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
789
790 * Downlink Payload (prefix 0x0A):
791
792 (% class="box infomessage" %)
793 (((
794 **0x0A aa     ~/~/ Same as AT+MOD=aa**
795 )))
796
797
798 ==== 3.4.2.3 Poll an uplink ====
799
800 * AT Command:
801
802 There is no AT Command to poll uplink
803
804 * Downlink Payload (prefix 0x08):
805
806 (% class="box infomessage" %)
807 (((
808 **0x08 FF     ~/~/ Poll an uplink,**
809 )))
810
811 **Example**: 0x08FF, ask device to send an Uplink
812
813
814 ==== 3.4.2.4 Enable Trigger Mode ====
815
816 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
817
818 * AT Command:
819
820 (% class="box infomessage" %)
821 (((
822 **AT+ADDMOD6=1 or 0**
823 )))
824
825 1: Enable Trigger Mode
826
827 0: Disable Trigger Mode
828
829 * Downlink Payload (prefix 0x0A 06):
830
831 (% class="box infomessage" %)
832 (((
833 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
834 )))
835
836
837 ==== 3.4.2.5 Poll trigger settings ====
838
839 Poll trigger settings,
840
841 * AT Command:
842
843 There is no AT Command for this feature.
844
845 * Downlink Payload (prefix 0x AB 06):
846
847 (% class="box infomessage" %)
848 (((
849 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
850 )))
851
852
853 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
854
855 Enable Disable DI1/DI2/DI2 as trigger,
856
857 * AT Command:
858
859 (% class="box infomessage" %)
860 (((
861 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
862 )))
863
864 **Example:**
865
866 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
867
868 * Downlink Payload (prefix 0xAA 02):
869
870 (% class="box infomessage" %)
871 (((
872 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
873 )))
874
875
876 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
877
878 Set DI1 or DI3(for LT-33222-L) trigger.
879
880 * AT Command:
881
882 (% class="box infomessage" %)
883 (((
884 **AT+TRIG1=a,b**
885 )))
886
887 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
888
889 b : delay timing.
890
891 **Example:**
892
893 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
894
895 * Downlink Payload (prefix 0x09 01 ):
896
897 (% class="box infomessage" %)
898 (((
899 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
900 )))
901
902
903 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
904
905 Set DI2 trigger.
906
907 * AT Command:
908
909 (% class="box infomessage" %)
910 (((
911 **AT+TRIG2=a,b**
912 )))
913
914 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
915
916 b : delay timing.
917
918 **Example:**
919
920 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
921
922 * Downlink Payload (prefix 0x09 02 ):
923
924 (% class="box infomessage" %)
925 (((
926 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
927 )))
928
929
930 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
931
932 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
933
934 * AT Command:
935
936 (% class="box infomessage" %)
937 (((
938 **AT+ACLIM. **
939 )))
940
941 * Downlink Payload (prefix 0xAA 01 ):
942
943 (% class="box infomessage" %)
944 (((
945 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
946 )))
947
948
949 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
950
951 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
952
953 * AT Command:
954
955 (% class="box infomessage" %)
956 (((
957 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
958 )))
959
960 * Downlink Payload (prefix 0xAA 00 ):
961
962 (% class="box infomessage" %)
963 (((
964 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
965 )))
966
967
968 ==== 3.4.2.11 Trigger – Set minimum interval ====
969
970 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
971
972 * AT Command:
973
974 (% class="box infomessage" %)
975 (((
976 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
977 )))
978
979 * Downlink Payload (prefix 0xAC ):
980
981 (% class="box infomessage" %)
982 (((
983 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
984 )))
985
986
987 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
988
989 * AT Command:
990
991 There is no AT Command to control Digital Output
992
993 * Downlink Payload (prefix 0x02):
994
995 (% class="box infomessage" %)
996 (((
997 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
998 )))
999
1000 (((
1001 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1002 )))
1003
1004 (((
1005 01: Low,  00: High ,  11: No action
1006 )))
1007
1008 [[image:image-20220524092754-5.png]]
1009
1010 (((
1011 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1012 )))
1013
1014 (((
1015 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1016 )))
1017
1018
1019 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1020
1021 * AT Command:
1022
1023 There is no AT Command to control Digital Output
1024
1025 * Downlink Payload (prefix 0xA9):
1026
1027 (% class="box infomessage" %)
1028 (((
1029 (((
1030 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1031 )))
1032 )))
1033
1034 This is to control the digital output time of DO pin. Include four bytes:
1035
1036 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1037
1038 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1039
1040 01: DO pins will change back to original state after timeout.
1041
1042 00: DO pins will change to an inverter state after timeout 
1043
1044 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1045
1046 [[image:image-20220524093238-6.png]]
1047
1048 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1049
1050 [[image:image-20220524093328-7.png]]
1051
1052 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1053
1054 [[image:image-20220524093351-8.png]]
1055
1056 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1057
1058 Latching time. Unit: ms
1059
1060 Device will upload a packet if downlink code executes successfully.
1061
1062 **Example payload:**
1063
1064 **~1. A9 01 01 01 01 07 D0**
1065
1066 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1067
1068 **2. A9 01 00 01 11 07 D0**
1069
1070 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1071
1072 **3. A9 00 00 00 00 07 D0**
1073
1074 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1075
1076 **4. A9 00 11 01 00 07 D0**
1077
1078 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
1079
1080
1081 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1082
1083 * AT Command:
1084
1085 There is no AT Command to control Relay Output
1086
1087 * Downlink Payload (prefix 0x03):
1088
1089 (% class="box infomessage" %)
1090 (((
1091 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1092 )))
1093
1094 (((
1095 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1096 )))
1097
1098 (((
1099 01: Close ,  00: Open , 11: No action
1100 )))
1101
1102 (((
1103 [[image:image-20220524093724-9.png]]
1104 )))
1105
1106 Device will upload a packet if downlink code executes successfully.
1107
1108
1109 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1110
1111 * AT Command:
1112
1113 There is no AT Command to control Relay Output
1114
1115 * Downlink Payload (prefix 0x05):
1116
1117 (% class="box infomessage" %)
1118 (((
1119 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1120 )))
1121
1122 This is to control the relay output time of relay. Include four bytes:
1123
1124 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1125
1126 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1127
1128 01: Relays will change back to original state after timeout.
1129
1130 00: Relays will change to an inverter state after timeout
1131
1132 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1133
1134 [[image:image-20220524093831-10.png]]
1135
1136 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1137
1138 Device will upload a packet if downlink code executes successfully.
1139
1140 **Example payload:**
1141
1142 **~1. 05 01 11 07 D0**
1143
1144 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1145
1146 **2. 05 01 10 07 D0**
1147
1148 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1149
1150 **3. 05 00 01 07 D0**
1151
1152 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1153
1154 **4. 05 00 00 07 D0**
1155
1156 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1157
1158
1159 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1160
1161 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1162
1163 * AT Command:
1164
1165 (% class="box infomessage" %)
1166 (((
1167 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1168 )))
1169
1170 * Downlink Payload (prefix 0xA5):
1171
1172 (% class="box infomessage" %)
1173 (((
1174 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1175 )))
1176
1177
1178 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1179
1180 * AT Command:
1181
1182 (% class="box infomessage" %)
1183 (((
1184 **AT+SETCNT=aa,(bb cc dd ee) **
1185 )))
1186
1187 aa: 1: Set count1,
1188
1189 2: Set count2,
1190
1191 3: Set AV1 count
1192
1193 Bb cc dd ee: number to be set
1194
1195 * Downlink Payload (prefix 0xA8):
1196
1197 (% class="box infomessage" %)
1198 (((
1199 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1200 )))
1201
1202
1203 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1204
1205 Clear counting for counting mode
1206
1207 * AT Command:
1208
1209 (% class="box infomessage" %)
1210 (((
1211 **AT+CLRCOUNT ~/~/ clear all counting**
1212 )))
1213
1214 * Downlink Payload (prefix 0xA6):
1215
1216 (% class="box infomessage" %)
1217 (((
1218 **0x A6 01     ~/~/ clear all counting,**
1219 )))
1220
1221
1222 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1223
1224 * AT Command:
1225
1226 (% class="box infomessage" %)
1227 (((
1228 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1229 )))
1230
1231 * Downlink Payload (prefix 0xA7):
1232
1233 (% class="box infomessage" %)
1234 (((
1235 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1236 )))
1237
1238 (((
1239 range: aa bb cc:0 to 16777215,  (unit:second)
1240
1241
1242 )))
1243
1244 == 3.5 Integrate with Mydevice ==
1245
1246 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:
1247
1248 (((
1249 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1250 )))
1251
1252 (((
1253 **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:
1254 )))
1255
1256 [[image:1653356737703-362.png||height="232" width="732"]]
1257
1258 [[image:image-20220524094641-11.png||height="390" width="723"]]
1259
1260 [[image:image-20220524094641-12.png||height="402" width="718"]]
1261
1262
1263 **Step 3**: Create an account or log in Mydevices.
1264
1265 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1266
1267 Search under The things network
1268
1269 [[image:1653356838789-523.png||height="337" width="740"]]
1270
1271
1272 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1273
1274 [[image:image-20220524094909-1.png||height="335" width="729"]]
1275
1276 [[image:image-20220524094909-2.png||height="337" width="729"]]
1277
1278 [[image:image-20220524094909-3.png||height="338" width="727"]]
1279
1280 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1281
1282 [[image:image-20220524094909-5.png||height="341" width="734"]]
1283
1284
1285 == 3.6 Interface Detail ==
1286
1287 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1288
1289 Support NPN Type sensor
1290
1291 [[image:1653356991268-289.png]]
1292
1293
1294 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1295
1296 (((
1297 The DI port of LT-22222-L can support NPN or PNP output sensor.
1298 )))
1299
1300 (((
1301 (((
1302 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
1303 )))
1304 )))
1305
1306 [[image:1653357170703-587.png]]
1307
1308 (((
1309 (((
1310 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1311 )))
1312 )))
1313
1314 (((
1315
1316 )))
1317
1318 (((
1319 **Example1**: Connect to a Low active sensor.
1320 )))
1321
1322 (((
1323 This type of sensor will output a low signal GND when active.
1324 )))
1325
1326 * (((
1327 Connect sensor’s output to DI1-
1328 )))
1329 * (((
1330 Connect sensor’s VCC to DI1+.
1331 )))
1332
1333 (((
1334 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1335 )))
1336
1337 (((
1338 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1339 )))
1340
1341 (((
1342 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.
1343 )))
1344
1345 (((
1346
1347 )))
1348
1349 (((
1350 **Example2**: Connect to a High active sensor.
1351 )))
1352
1353 (((
1354 This type of sensor will output a high signal (example 24v) when active.
1355 )))
1356
1357 * (((
1358 Connect sensor’s output to DI1+
1359 )))
1360 * (((
1361 Connect sensor’s GND DI1-.
1362 )))
1363
1364 (((
1365 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1366 )))
1367
1368 (((
1369 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1370 )))
1371
1372 (((
1373 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.
1374 )))
1375
1376 (((
1377
1378 )))
1379
1380 (((
1381 **Example3**: Connect to a 220v high active sensor.
1382 )))
1383
1384 (((
1385 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1386 )))
1387
1388 * (((
1389 Connect sensor’s output to DI1+ with a serial 50K resistor
1390 )))
1391 * (((
1392 Connect sensor’s GND DI1-.
1393 )))
1394
1395 (((
1396 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1397 )))
1398
1399 (((
1400 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1401 )))
1402
1403 (((
1404 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.
1405 )))
1406
1407
1408 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1409
1410 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1411
1412 [[image:1653357531600-905.png]]
1413
1414
1415 === 3.6.4 Analog Input Interface ===
1416
1417 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:
1418
1419 **AC2 = (IN2 voltage )/12**
1420
1421 [[image:1653357592296-182.png]]
1422
1423 Example to connect a 4~~20mA sensor
1424
1425 We take the wind speed sensor as an example for reference only.
1426
1427 Specifications of the wind speed sensor:
1428
1429 Red:12~~24v
1430
1431 Yellow:4~~20mA
1432
1433 Black:GND
1434
1435
1436 Connection diagram:
1437
1438 [[image:1653357640609-758.png]]
1439
1440 [[image:1653357648330-671.png||height="155" width="733"]]
1441
1442
1443 === 3.6.5 Relay Output ===
1444
1445 (((
1446 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:
1447 )))
1448
1449 [[image:image-20220524100215-9.png]]
1450
1451 [[image:image-20220524100215-10.png||height="382" width="723"]]
1452
1453
1454 == 3.7 LEDs Indicators ==
1455
1456 [[image:image-20220524100748-11.png]]
1457
1458
1459 = 4. Use AT Command =
1460
1461 == 4.1 Access AT Command ==
1462
1463 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.
1464
1465 [[image:1653358238933-385.png]]
1466
1467 (((
1468 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:
1469 )))
1470
1471 [[image:1653358355238-883.png]]
1472
1473 (((
1474 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/]]
1475 )))
1476
1477 (((
1478 AT+<CMD>?        : Help on <CMD>
1479 )))
1480
1481 (((
1482 AT+<CMD>         : Run <CMD>
1483 )))
1484
1485 (((
1486 AT+<CMD>=<value> : Set the value
1487 )))
1488
1489 (((
1490 AT+<CMD>=?       : Get the value
1491 )))
1492
1493 (((
1494 ATZ: Trig a reset of the MCU
1495 )))
1496
1497 (((
1498 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1499 )))
1500
1501 (((
1502 AT+DEUI: Get or Set the Device EUI
1503 )))
1504
1505 (((
1506 AT+DADDR: Get or Set the Device Address
1507 )))
1508
1509 (((
1510 AT+APPKEY: Get or Set the Application Key
1511 )))
1512
1513 (((
1514 AT+NWKSKEY: Get or Set the Network Session Key
1515 )))
1516
1517 (((
1518 AT+APPSKEY: Get or Set the Application Session Key
1519 )))
1520
1521 (((
1522 AT+APPEUI: Get or Set the Application EUI
1523 )))
1524
1525 (((
1526 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1527 )))
1528
1529 (((
1530 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1531 )))
1532
1533 (((
1534 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1535 )))
1536
1537 (((
1538 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1539 )))
1540
1541 (((
1542 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1543 )))
1544
1545 (((
1546 AT+RX2FQ: Get or Set the Rx2 window frequency
1547 )))
1548
1549 (((
1550 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1551 )))
1552
1553 (((
1554 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1555 )))
1556
1557 (((
1558 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1559 )))
1560
1561 (((
1562 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1563 )))
1564
1565 (((
1566 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1567 )))
1568
1569 (((
1570 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1571 )))
1572
1573 (((
1574 AT+NWKID: Get or Set the Network ID
1575 )))
1576
1577 (((
1578 AT+FCU: Get or Set the Frame Counter Uplink
1579 )))
1580
1581 (((
1582 AT+FCD: Get or Set the Frame Counter Downlink
1583 )))
1584
1585 (((
1586 AT+CLASS: Get or Set the Device Class
1587 )))
1588
1589 (((
1590 AT+JOIN: Join network
1591 )))
1592
1593 (((
1594 AT+NJS: Get OTAA Join Status
1595 )))
1596
1597 (((
1598 AT+SENDB: Send hexadecimal data along with the application port
1599 )))
1600
1601 (((
1602 AT+SEND: Send text data along with the application port
1603 )))
1604
1605 (((
1606 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1607 )))
1608
1609 (((
1610 AT+RECV: Print last received data in raw format
1611 )))
1612
1613 (((
1614 AT+VER: Get current image version and Frequency Band
1615 )))
1616
1617 (((
1618 AT+CFM: Get or Set the confirmation mode (0-1)
1619 )))
1620
1621 (((
1622 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1623 )))
1624
1625 (((
1626 AT+SNR: Get the SNR of the last received packet
1627 )))
1628
1629 (((
1630 AT+RSSI: Get the RSSI of the last received packet
1631 )))
1632
1633 (((
1634 AT+TDC: Get or set the application data transmission interval in ms
1635 )))
1636
1637 (((
1638 AT+PORT: Get or set the application port
1639 )))
1640
1641 (((
1642 AT+DISAT: Disable AT commands
1643 )))
1644
1645 (((
1646 AT+PWORD: Set password, max 9 digits
1647 )))
1648
1649 (((
1650 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1651 )))
1652
1653 (((
1654 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1655 )))
1656
1657 (((
1658 AT+CFG: Print all settings
1659
1660
1661 )))
1662
1663 == 4.2 Common AT Command Sequence ==
1664
1665 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1666
1667 (((
1668 If device has not joined network yet:
1669 )))
1670
1671 (((
1672 (% style="background-color:#dcdcdc" %)123456
1673 )))
1674
1675 (((
1676 (% style="background-color:#dcdcdc" %)AT+FDR
1677 )))
1678
1679 (((
1680 (% style="background-color:#dcdcdc" %)123456
1681 )))
1682
1683 (((
1684 (% style="background-color:#dcdcdc" %)AT+NJM=0
1685 )))
1686
1687 (((
1688 (% style="background-color:#dcdcdc" %)ATZ
1689 )))
1690
1691
1692 (((
1693 If device already joined network:
1694 )))
1695
1696 (((
1697 (% style="background-color:#dcdcdc" %)AT+NJM=0
1698 )))
1699
1700 (((
1701 (% style="background-color:#dcdcdc" %)ATZ
1702
1703
1704 )))
1705
1706 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1707
1708 (((
1709 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1710 )))
1711
1712 (((
1713 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1714 )))
1715
1716 (((
1717 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1718 )))
1719
1720 (((
1721 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1722 )))
1723
1724 (((
1725 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1726 )))
1727
1728 (((
1729 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1730 )))
1731
1732 (((
1733 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1734 )))
1735
1736 (((
1737 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1738 )))
1739
1740 (((
1741 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1742 )))
1743
1744 (((
1745 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1746 )))
1747
1748 (((
1749 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1750 )))
1751
1752 (((
1753 (% 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.
1754 )))
1755
1756 (((
1757 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1758 )))
1759
1760 (((
1761 (% style="color:red" %)**Note:**
1762 )))
1763
1764 (((
1765 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1766 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1767 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.
1768 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
1769 )))
1770
1771 (((
1772 [[image:1653359097980-169.png||height="188" width="729"]]
1773 )))
1774
1775 (((
1776
1777 )))
1778
1779 === 4.2.3 Change to Class A ===
1780
1781 If sensor JOINED
1782 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1783 ATZ
1784
1785
1786 = 5. FAQ =
1787
1788 == 5.1 How to upgrade the image? ==
1789
1790 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1791
1792 * Support new features
1793 * For bug fix
1794 * Change LoRaWAN bands.
1795 Below shows the hardware connection for how to upload an image to the LT:
1796 * [[image:1653359603330-121.png]]
1797
1798 (((
1799 **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]].
1800 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1801 **Step3: **Open flashloader; choose the correct COM port to update.
1802 **For LT-22222-L**:
1803 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.
1804 )))
1805
1806 [[image:image-20220524103407-12.png]]
1807
1808 [[image:image-20220524103429-13.png]]
1809
1810 [[image:image-20220524104033-15.png]]
1811
1812 (% 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:
1813
1814 [[image:1653360054704-518.png||height="186" width="745"]]
1815
1816
1817 (((
1818 (((
1819 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1820 )))
1821 )))
1822
1823 (((
1824 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1825
1826
1827 )))
1828
1829 (((
1830 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1831 )))
1832
1833 (((
1834 (((
1835 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1836 )))
1837 )))
1838
1839 (((
1840 (((
1841 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1842 )))
1843 )))
1844
1845 (((
1846 (% 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.
1847 )))
1848
1849 (((
1850 [[image:1653360231087-571.png||height="401" width="727"]]
1851 )))
1852
1853 (((
1854 (% 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.
1855 )))
1856
1857 (((
1858 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1859 )))
1860
1861 (((
1862 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1863 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1864 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1865 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1866 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1867 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1868 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1869 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1870 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1871 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1872 )))
1873
1874 (((
1875 As shown in below:
1876 )))
1877
1878 [[image:1653360498588-932.png||height="485" width="726"]]
1879
1880
1881 == 5.4 Can I see counting event in Serial? ==
1882
1883 (((
1884 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.
1885
1886
1887 == 5.5 Can i use point to point communication for LT-22222-L? ==
1888
1889 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1890
1891
1892 )))
1893
1894 (((
1895 = 6. Trouble Shooting =
1896 )))
1897
1898 (((
1899 (((
1900 == 6.1 Downlink doesn’t work, how to solve it? ==
1901 )))
1902 )))
1903
1904 (((
1905 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1906
1907
1908 )))
1909
1910 (((
1911 == 6.2 Have trouble to upload image. ==
1912 )))
1913
1914 (((
1915 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1916 )))
1917
1918 (((
1919
1920 )))
1921
1922 (((
1923 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1924 )))
1925
1926 (((
1927 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1928 )))
1929
1930 (((
1931
1932 )))
1933
1934 (((
1935 = 7. Order Info =
1936 )))
1937
1938 (((
1939 (((
1940 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1941 )))
1942 )))
1943
1944 (((
1945 (((
1946 (% style="color:#4f81bd" %)**XXX:**
1947 )))
1948 )))
1949
1950 (((
1951 * (((
1952 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1953 )))
1954 )))
1955
1956 (((
1957 * (((
1958 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1959 )))
1960 )))
1961
1962 (((
1963 * (((
1964 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1965 )))
1966 )))
1967
1968 (((
1969 * (((
1970 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1971 )))
1972 )))
1973
1974 (((
1975 * (((
1976 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1977 )))
1978 )))
1979
1980 (((
1981 * (((
1982 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1983 )))
1984 )))
1985
1986 (((
1987 * (((
1988 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1989 )))
1990 )))
1991
1992 (((
1993 * (((
1994 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1995 )))
1996 )))
1997
1998 (((
1999 * (((
2000 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2001
2002
2003 )))
2004
2005 = 8. Packing Info =
2006 )))
2007
2008 (((
2009 (((
2010 **Package Includes**:
2011 )))
2012 )))
2013
2014 (((
2015 (((
2016 * LT-22222-L I/O Controller x 1
2017 * Stick Antenna for LoRa RF part x 1
2018 * Bracket for controller x1
2019 * Program cable x 1
2020 )))
2021 )))
2022
2023 (((
2024 (((
2025 **Dimension and weight**:
2026 )))
2027 )))
2028
2029 (((
2030 (((
2031 * Device Size: 13.5 x 7 x 3 cm
2032 * Device Weight: 105g
2033 * Package Size / pcs : 14.5 x 8 x 5 cm
2034 * Weight / pcs : 170g
2035
2036
2037 )))
2038 )))
2039
2040 (((
2041 = 9. Support =
2042 )))
2043
2044 * (((
2045 (((
2046 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.
2047 )))
2048 )))
2049 * (((
2050 (((
2051 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
2052 )))
2053 )))
2054
2055 (((
2056 (((
2057 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2058
2059
2060 )))
2061
2062 (((
2063 = 10. Reference​​​​​ =
2064
2065 * Product Page:
2066
2067 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]]
2068
2069 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2070 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2071 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2072 )))
2073 )))