Version 77.70 by Xiaoling on 2022/06/10 09:22
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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 **Interface for Model: LT22222-L:**
80 )))
81
82 * (((
83 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
84 )))
85 * (((
86 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
87 )))
88 * (((
89 2 x Relay Output (5A@250VAC / 30VDC)
90 )))
91 * (((
92 2 x 0~~20mA Analog Input (res:0.01mA)
93 )))
94 * (((
95 2 x 0~~30V Analog Input (res:0.01v)
96 )))
97 * (((
98 Power Input 7~~ 24V DC. 
99 )))
100
101 (((
102 **LoRa Spec:**
103 )))
104
105 * (((
106 (((
107 Frequency Range:
108 )))
109
110 * (((
111 Band 1 (HF): 862 ~~ 1020 Mhz
112 )))
113 * (((
114 Band 2 (LF): 410 ~~ 528 Mhz
115 )))
116 )))
117 * (((
118 168 dB maximum link budget.
119 )))
120 * (((
121 +20 dBm - 100 mW constant RF output vs.
122 )))
123 * (((
124 +14 dBm high efficiency PA.
125 )))
126 * (((
127 Programmable bit rate up to 300 kbps.
128 )))
129 * (((
130 High sensitivity: down to -148 dBm.
131 )))
132 * (((
133 Bullet-proof front end: IIP3 = -12.5 dBm.
134 )))
135 * (((
136 Excellent blocking immunity.
137 )))
138 * (((
139 Low RX current of 10.3 mA, 200 nA register retention.
140 )))
141 * (((
142 Fully integrated synthesizer with a resolution of 61 Hz.
143 )))
144 * (((
145 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
146 )))
147 * (((
148 Built-in bit synchronizer for clock recovery.
149 )))
150 * (((
151 Preamble detection.
152 )))
153 * (((
154 127 dB Dynamic Range RSSI.
155 )))
156 * (((
157 Automatic RF Sense and CAD with ultra-fast AFC.
158 )))
159 * (((
160 Packet engine up to 256 bytes with CRC.
161
162
163 )))
164
165 == 1.3 Features ==
166
167 * LoRaWAN Class A & Class C protocol
168 * Optional Customized LoRa Protocol
169 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
170 * AT Commands to change parameters
171 * Remote configure parameters via LoRa Downlink
172 * Firmware upgradable via program port
173 * Counting
174
175 == 1.4  Applications ==
176
177 * Smart Buildings & Home Automation
178 * Logistics and Supply Chain Management
179 * Smart Metering
180 * Smart Agriculture
181 * Smart Cities
182 * Smart Factory
183
184 == 1.5 Hardware Variants ==
185
186 (% border="1" style="background-color:#f7faff; width:500px" %)
187 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
188 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
189 * 2 x Digital Input (Bi-direction)
190 * 2 x Digital Output
191 * 2 x Relay Output (5A@250VAC / 30VDC)
192 * 2 x 0~~20mA Analog Input (res:0.01mA)
193 * 2 x 0~~30V Analog Input (res:0.01v)
194 * 1 x Counting Port
195 )))
196
197 = 2. Power ON Device =
198
199 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.
200
201 (((
202 PWR will on when device is properly powered.
203 )))
204
205 [[image:1653297104069-180.png]]
206
207
208
209 = 3. Operation Mode =
210
211 == 3.1 How it works? ==
212
213 (((
214 The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on **TX LED** will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. **TX LED** will be on for 5 seconds after joined in network. When there is message from server, the **RX LED** will be on for 1 second. 
215 )))
216
217 (((
218 In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>||anchor="H4.UseATCommand"]] to set the keys in the devices.
219
220
221 )))
222
223
224
225 == 3.2 Example to join LoRaWAN network ==
226
227 (((
228 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. 
229 )))
230
231 [[image:image-20220523172350-1.png||height="266" width="864"]]
232
233 (((
234 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:
235 )))
236
237 (((
238 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
239 )))
240
241 (((
242 Each LT is shipped with a sticker with the default device EUI as below:
243 )))
244
245 [[image:1653297924498-393.png]]
246
247 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
248
249 Add APP EUI in the application.
250
251 [[image:1653297955910-247.png||height="321" width="716"]]
252
253
254 Add APP KEY and DEV EUI
255
256 [[image:1653298023685-319.png]]
257
258
259 (((
260 **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.
261 )))
262
263 [[image:1653298044601-602.png||height="405" width="709"]]
264
265
266
267 == 3.3 Uplink Payload ==
268
269 There are five working modes + one interrupt mode on LT for different type application:
270
271 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
272 * **MOD2**: Double DI Counting + DO + RO
273 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
274 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
275 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
276 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
277
278 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
279
280 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
281
282 [[image:image-20220523174024-3.png]]
283
284 (((
285 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
286 )))
287
288 [[image:image-20220523174254-4.png]]
289
290 * RO is for relay. ROx=1 : close，ROx=0 always open.
291 * DI is for digital input. DIx=1: high or float, DIx=0: low.
292 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
293
294 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
295
296 For example if payload is: [[image:image-20220523175847-2.png]]
297
298 **The value for the interface is:  **
299
300 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
301
302 AVI2 channel voltage is 0x04AC/1000=1.196V
303
304 ACI1 channel current is 0x1310/1000=4.880mA
305
306 ACI2 channel current is 0x1300/1000=4.864mA
307
308 The last byte 0xAA= 10101010(B) means
309
310 * [1] RO1 relay channel is close and the RO1 LED is ON.
311 * [0] RO2 relay channel is open and RO2 LED is OFF;
312
313 **LT22222-L:**
314
315 * [1] DI2 channel is high input and DI2 LED is ON;
316 * [0] DI1 channel is low input;
317
318 * [0] DO3 channel output state
319 ** DO3 is float in case no load between DO3 and V+.;
320 ** DO3 is high in case there is load between DO3 and V+.
321 ** DO3 LED is off in both case
322 * [1] DO2 channel output is low and DO2 LED is ON.
323 * [0] DO1 channel output state
324 ** DO1 is float in case no load between DO1 and V+.;
325 ** DO1 is high in case there is load between DO1 and V+.
326 ** DO1 LED is off in both case
327
328 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
329
330 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
331
332 (((
333 Total : 11 bytes payload
334 )))
335
336 [[image:image-20220523180452-3.png]]
337
338 (((
339 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
340 )))
341
342 [[image:image-20220523180506-4.png]]
343
344 * RO is for relay. ROx=1 : close，ROx=0 always open.
345 * FIRST: Indicate this is the first packet after join network.
346 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
347
348 (((
349 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
350 )))
351
352 (((
353 **To use counting mode, please run:**
354 )))
355
356 (% class="box infomessage" %)
357 (((
358 (((
359 **AT+MOD=2**
360 )))
361 )))
362
363 (% class="box infomessage" %)
364 (((
365 (((
366 **ATZ**
367 )))
368 )))
369
370 (((
371 (% style="color:#4f81bd" %)**AT Commands for counting:**
372 )))
373
374 (((
375 **For LT22222-L:**
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
382 )))
383 )))
384
385 (% class="box infomessage" %)
386 (((
387 (((
388 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
389 )))
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
396 )))
397 )))
398
399 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
403 )))
404 )))
405
406 (% class="box infomessage" %)
407 (((
408 (((
409 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
410 )))
411 )))
412
413 (% class="box infomessage" %)
414 (((
415 (((
416 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
417 )))
418 )))
419
420
421
422 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
423
424 **LT22222-L**: This mode the DI1 is used as a counting pin.
425
426 [[image:image-20220523181246-5.png]]
427
428 (((
429 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
430 )))
431
432 [[image:image-20220523181301-6.png]]
433
434 * RO is for relay. ROx=1 : close，ROx=0 always open.
435 * FIRST: Indicate this is the first packet after join network.
436 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
437
438 (((
439 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
440 )))
441
442 (((
443 **To use counting mode, please run:**
444 )))
445
446 (% class="box infomessage" %)
447 (((
448 (((
449 **AT+MOD=3**
450 )))
451 )))
452
453 (% class="box infomessage" %)
454 (((
455 (((
456 **ATZ**
457 )))
458 )))
459
460 (((
461 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
462
463
464 )))
465
466
467
468 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
469
470 **LT22222-L**: This mode the DI1 is used as a counting pin.
471
472 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.
473
474 [[image:image-20220523181903-8.png]]
475
476 (((
477 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
478 )))
479
480 [[image:image-20220523181727-7.png]]
481
482 * RO is for relay. ROx=1 : close，ROx=0 always open.
483 * FIRST: Indicate this is the first packet after join network.
484 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
485
486 (((
487 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
488 )))
489
490 (((
491 **To use this mode, please run:**
492 )))
493
494 (% class="box infomessage" %)
495 (((
496 (((
497 **AT+MOD=4**
498 )))
499 )))
500
501 (% class="box infomessage" %)
502 (((
503 (((
504 **ATZ**
505 )))
506 )))
507
508 (((
509
510 )))
511
512 (((
513 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
514 )))
515
516 (((
517 **Plus below command for AVI1 Counting:**
518 )))
519
520 (% class="box infomessage" %)
521 (((
522 (((
523 **AT+SETCNT=3,60   (set AVI Count to 60)**
524 )))
525 )))
526
527 (% class="box infomessage" %)
528 (((
529 (((
530 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
531 )))
532 )))
533
534 (% class="box infomessage" %)
535 (((
536 (((
537 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
538 )))
539 )))
540
541 (% class="box infomessage" %)
542 (((
543 (((
544 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
545 )))
546 )))
547
548
549
550 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
551
552 **LT22222-L**: This mode the DI1 is used as a counting pin.
553
554 [[image:image-20220523182334-9.png]]
555
556 (((
557 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
558 )))
559
560 * RO is for relay. ROx=1 : close，ROx=0 always open.
561 * FIRST: Indicate this is the first packet after join network.
562 * (((
563 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
564 )))
565
566 (((
567 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
568 )))
569
570 (((
571 **To use this mode, please run:**
572 )))
573
574 (% class="box infomessage" %)
575 (((
576 (((
577 **AT+MOD=5**
578 )))
579 )))
580
581 (% class="box infomessage" %)
582 (((
583 (((
584 **ATZ**
585 )))
586 )))
587
588 (((
589 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
590
591
592 )))
593
594
595
596 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
597
598 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
599
600 For example, if user has configured below commands:
601
602 * **AT+MOD=1 ** **~-~->** The normal working mode
603 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
604
605 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
606
607 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
608 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.**
609
610 **AT Command to set Trigger Condition**:
611
612 (% style="color:#4f81bd" %)**Trigger base on voltage**:
613
614 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
615
616 **Example:**
617
618 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)
619
620 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
621
622
623 (% style="color:#4f81bd" %)**Trigger base on current**:
624
625 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
626
627 **Example:**
628
629 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
630
631
632 (% style="color:#4f81bd" %)**Trigger base on DI status**:
633
634 DI status trigger Flag.
635
636 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
637
638 **Example:**
639
640 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
641
642
643 **Downlink Command to set Trigger Condition**
644
645 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
646
647 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
648
649 AA: Code for this downlink Command:
650
651 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
652
653 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
654
655 yy2 yy2: AC1 or AV1 high limit.
656
657 yy3 yy3: AC2 or AV2 low limit.
658
659 Yy4 yy4: AC2 or AV2 high limit.
660
661 **Example1**: AA 00 13 88 00 00 00 00 00 00
662
663 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
664
665 **Example2**: AA 02 01 00
666
667 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
668
669 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
670
671 MOD6 Payload : total 11 bytes payload
672
673 [[image:image-20220524085923-1.png]]
674
675 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
676
677 [[image:image-20220524090106-2.png]]
678
679 * Each bits shows if the corresponding trigger has been configured.
680
681 **Example:**
682
683 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
684
685
686 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
687
688 [[image:image-20220524090249-3.png]]
689
690 * Each bits shows which status has been trigger on this uplink.
691
692 **Example:**
693
694 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
695
696
697 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
698
699 [[image:image-20220524090456-4.png]]
700
701 * Each bits shows which status has been trigger on this uplink.
702
703 **Example:**
704
705 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
706
707 00000101: Means both DI1 and DI2 trigger are enabled.
708
709
710 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
711
712 Downlink command to poll MOD6 status:
713
714 **AB 06**
715
716 When device got this command, it will send the MOD6 payload.
717
718
719
720 === 3.3.7 Payload Decoder ===
721
722 (((
723 **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/]]
724
725
726 )))
727
728
729
730 == 3.4 ​Configure LT via AT or Downlink ==
731
732 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
733
734 (((
735 There are two kinds of Commands:
736 )))
737
738 * (% 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]]
739
740 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
741
742
743
744 === 3.4.1 Common Commands ===
745
746 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]]
747
748
749
750 === 3.4.2 Sensor related commands ===
751
752 ==== 3.4.2.1 Set Transmit Interval ====
753
754 Set device uplink interval.
755
756 * AT Command:
757
758 (% class="box infomessage" %)
759 (((
760 **AT+TDC=N **
761 )))
762
763 **Example: **AT+TDC=30000. Means set interval to 30 seconds
764
765
766 * Downlink Payload (prefix 0x01):
767
768 (% class="box infomessage" %)
769 (((
770 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
771 )))
772
773
774
775 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
776
777 Set work mode.
778
779 * AT Command:
780
781 (% class="box infomessage" %)
782 (((
783 **AT+MOD=N  **
784 )))
785
786 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
787
788
789 * Downlink Payload (prefix 0x0A):
790
791 (% class="box infomessage" %)
792 (((
793 **0x0A aa     ~/~/ Same as AT+MOD=aa**
794 )))
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
805 * Downlink Payload (prefix 0x08):
806
807 (% class="box infomessage" %)
808 (((
809 **0x08 FF     ~/~/ Poll an uplink,**
810 )))
811
812 **Example**: 0x08FF, ask device to send an Uplink
813
814
815
816 ==== 3.4.2.4 Enable Trigger Mode ====
817
818 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
819
820 * AT Command:
821
822 (% class="box infomessage" %)
823 (((
824 **AT+ADDMOD6=1 or 0**
825 )))
826
827 1: Enable Trigger Mode
828
829 0: Disable Trigger Mode
830
831
832 * Downlink Payload (prefix 0x0A 06):
833
834 (% class="box infomessage" %)
835 (((
836 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
837 )))
838
839
840
841 ==== 3.4.2.5 Poll trigger settings ====
842
843 Poll trigger settings,
844
845 * AT Command:
846
847 There is no AT Command for this feature.
848
849
850 * Downlink Payload (prefix 0x AB 06):
851
852 (% class="box infomessage" %)
853 (((
854 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
855 )))
856
857
858
859 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
860
861 Enable Disable DI1/DI2/DI2 as trigger,
862
863 * AT Command:
864
865 (% class="box infomessage" %)
866 (((
867 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
868 )))
869
870
871 **Example:**
872
873 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
874
875 * Downlink Payload (prefix 0xAA 02):
876
877 (% class="box infomessage" %)
878 (((
879 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
880 )))
881
882
883
884 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
885
886 Set DI1 or DI3(for LT-33222-L) trigger.
887
888 * AT Command:
889
890 (% class="box infomessage" %)
891 (((
892 **AT+TRIG1=a,b**
893 )))
894
895 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
896
897 b : delay timing.
898
899
900 **Example:**
901
902 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
903
904
905 * Downlink Payload (prefix 0x09 01 ):
906
907 (% class="box infomessage" %)
908 (((
909 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
910 )))
911
912
913
914 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
915
916 Set DI2 trigger.
917
918 * AT Command:
919
920 (% class="box infomessage" %)
921 (((
922 **AT+TRIG2=a,b**
923 )))
924
925 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
926
927 b : delay timing.
928
929
930 **Example:**
931
932 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
933
934
935 * Downlink Payload (prefix 0x09 02 ):
936
937 (% class="box infomessage" %)
938 (((
939 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
940 )))
941
942
943
944 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
945
946 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
947
948 * AT Command:
949
950 (% class="box infomessage" %)
951 (((
952 **AT+ACLIM. **
953 )))
954
955
956 * Downlink Payload (prefix 0xAA 01 ):
957
958 (% class="box infomessage" %)
959 (((
960 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
961 )))
962
963
964
965 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
966
967 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
968
969 * AT Command:
970
971 (% class="box infomessage" %)
972 (((
973 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
974 )))
975
976
977 * Downlink Payload (prefix 0xAA 00 ):
978
979 (% class="box infomessage" %)
980 (((
981 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
982 )))
983
984
985
986 ==== 3.4.2.11 Trigger – Set minimum interval ====
987
988 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
989
990 * AT Command:
991
992 (% class="box infomessage" %)
993 (((
994 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
995 )))
996
997
998 * Downlink Payload (prefix 0xAC ):
999
1000 (% class="box infomessage" %)
1001 (((
1002 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1003 )))
1004
1005
1006
1007 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1008
1009 * AT Command:
1010
1011 There is no AT Command to control Digital Output
1012
1013
1014 * Downlink Payload (prefix 0x02):
1015
1016 (% class="box infomessage" %)
1017 (((
1018 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1019 )))
1020
1021 (((
1022 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1023 )))
1024
1025 (((
1026 01: Low,  00: High ,  11: No action
1027 )))
1028
1029 [[image:image-20220524092754-5.png]]
1030
1031 (((
1032 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1033 )))
1034
1035 (((
1036 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1037 )))
1038
1039
1040
1041 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1042
1043 * AT Command:
1044
1045 There is no AT Command to control Digital Output
1046
1047
1048 * Downlink Payload (prefix 0xA9):
1049
1050 (% class="box infomessage" %)
1051 (((
1052 (((
1053 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1054 )))
1055 )))
1056
1057 This is to control the digital output time of DO pin. Include four bytes:
1058
1059 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1060
1061 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1062
1063 01: DO pins will change back to original state after timeout.
1064
1065 00: DO pins will change to an inverter state after timeout 
1066
1067
1068 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1069
1070 [[image:image-20220524093238-6.png]]
1071
1072
1073 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1074
1075 [[image:image-20220524093328-7.png]]
1076
1077
1078 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1079
1080 [[image:image-20220524093351-8.png]]
1081
1082
1083 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1084
1085 Latching time. Unit: ms
1086
1087 Device will upload a packet if downlink code executes successfully.
1088
1089
1090 **Example payload:**
1091
1092 **~1. A9 01 01 01 01 07 D0**
1093
1094 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1095
1096 **2. A9 01 00 01 11 07 D0**
1097
1098 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1099
1100 **3. A9 00 00 00 00 07 D0**
1101
1102 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1103
1104 **4. A9 00 11 01 00 07 D0**
1105
1106 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
1107
1108
1109
1110 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1111
1112 * AT Command:
1113
1114 There is no AT Command to control Relay Output
1115
1116
1117 * Downlink Payload (prefix 0x03):
1118
1119 (% class="box infomessage" %)
1120 (((
1121 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1122 )))
1123
1124 (((
1125 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1126 )))
1127
1128 (((
1129 01: Close ,  00: Open , 11: No action
1130 )))
1131
1132 (((
1133 [[image:image-20220524093724-9.png]]
1134 )))
1135
1136 Device will upload a packet if downlink code executes successfully.
1137
1138
1139
1140 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1141
1142 * AT Command:
1143
1144 There is no AT Command to control Relay Output
1145
1146
1147 * Downlink Payload (prefix 0x05):
1148
1149 (% class="box infomessage" %)
1150 (((
1151 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1152 )))
1153
1154 This is to control the relay output time of relay. Include four bytes:
1155
1156 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1157
1158 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1159
1160 01: Relays will change back to original state after timeout.
1161
1162 00: Relays will change to an inverter state after timeout
1163
1164
1165 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1166
1167 [[image:image-20220524093831-10.png]]
1168
1169
1170 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1171
1172 Device will upload a packet if downlink code executes successfully.
1173
1174
1175 **Example payload:**
1176
1177 **~1. 05 01 11 07 D0**
1178
1179 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1180
1181 **2. 05 01 10 07 D0**
1182
1183 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1184
1185 **3. 05 00 01 07 D0**
1186
1187 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1188
1189 **4. 05 00 00 07 D0**
1190
1191 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1192
1193
1194
1195 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1196
1197 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1198
1199 * AT Command:
1200
1201 (% class="box infomessage" %)
1202 (((
1203 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1204 )))
1205
1206
1207 * Downlink Payload (prefix 0xA5):
1208
1209 (% class="box infomessage" %)
1210 (((
1211 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1212 )))
1213
1214
1215
1216 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1217
1218 * AT Command:
1219
1220 (% class="box infomessage" %)
1221 (((
1222 **AT+SETCNT=aa,(bb cc dd ee) **
1223 )))
1224
1225 aa: 1: Set count1,
1226
1227 2: Set count2,
1228
1229 3: Set AV1 count
1230
1231 Bb cc dd ee: number to be set
1232
1233
1234 * Downlink Payload (prefix 0xA8):
1235
1236 (% class="box infomessage" %)
1237 (((
1238 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1239 )))
1240
1241
1242
1243 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1244
1245 Clear counting for counting mode
1246
1247 * AT Command:
1248
1249 (% class="box infomessage" %)
1250 (((
1251 **AT+CLRCOUNT ~/~/ clear all counting**
1252 )))
1253
1254 * Downlink Payload (prefix 0xA6):
1255
1256 (% class="box infomessage" %)
1257 (((
1258 **0x A6 01     ~/~/ clear all counting,**
1259 )))
1260
1261
1262
1263 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1264
1265 * AT Command:
1266
1267 (% class="box infomessage" %)
1268 (((
1269 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1270 )))
1271
1272 * Downlink Payload (prefix 0xA7):
1273
1274 (% class="box infomessage" %)
1275 (((
1276 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1277 )))
1278
1279 (((
1280 range: aa bb cc:0 to 16777215,  (unit:second)
1281
1282
1283 )))
1284
1285
1286 == 3.5 Integrate with Mydevice ==
1287
1288 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:
1289
1290 (((
1291 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1292 )))
1293
1294 (((
1295 (% style="color:blue" %)**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:
1296 )))
1297
1298 [[image:1653356737703-362.png||height="232" width="732"]]
1299
1300 [[image:image-20220524094641-11.png||height="390" width="723"]]
1301
1302
1303 [[image:image-20220524094641-12.png||height="402" width="718"]]
1304
1305
1306 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1307
1308 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1309
1310 Search under The things network
1311
1312 [[image:1653356838789-523.png||height="337" width="740"]]
1313
1314
1315
1316 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1317
1318 [[image:image-20220524094909-1.png||height="335" width="729"]]
1319
1320
1321 [[image:image-20220524094909-2.png||height="337" width="729"]]
1322
1323
1324 [[image:image-20220524094909-3.png||height="338" width="727"]]
1325
1326
1327 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1328
1329
1330 [[image:image-20220524094909-5.png||height="341" width="734"]]
1331
1332
1333
1334 == 3.6 Interface Detail ==
1335
1336 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1337
1338 Support NPN Type sensor
1339
1340 [[image:1653356991268-289.png]]
1341
1342
1343
1344 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1345
1346 (((
1347 The DI port of LT-22222-L can support NPN or PNP output sensor.
1348 )))
1349
1350 (((
1351 (((
1352 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
1353 )))
1354 )))
1355
1356 [[image:1653357170703-587.png]]
1357
1358 (((
1359 (((
1360 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1361 )))
1362 )))
1363
1364 (((
1365
1366 )))
1367
1368 (((
1369 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1370 )))
1371
1372 (((
1373 This type of sensor will output a low signal GND when active.
1374 )))
1375
1376 * (((
1377 Connect sensor’s output to DI1-
1378 )))
1379 * (((
1380 Connect sensor’s VCC to DI1+.
1381 )))
1382
1383 (((
1384 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1385 )))
1386
1387 (((
1388 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1389 )))
1390
1391 (((
1392 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.
1393 )))
1394
1395 (((
1396
1397 )))
1398
1399 (((
1400 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1401 )))
1402
1403 (((
1404 This type of sensor will output a high signal (example 24v) when active.
1405 )))
1406
1407 * (((
1408 Connect sensor’s output to DI1+
1409 )))
1410 * (((
1411 Connect sensor’s GND DI1-.
1412 )))
1413
1414 (((
1415 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1416 )))
1417
1418 (((
1419 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1420 )))
1421
1422 (((
1423 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.
1424 )))
1425
1426 (((
1427
1428 )))
1429
1430 (((
1431 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1432 )))
1433
1434 (((
1435 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1436 )))
1437
1438 * (((
1439 Connect sensor’s output to DI1+ with a serial 50K resistor
1440 )))
1441 * (((
1442 Connect sensor’s GND DI1-.
1443 )))
1444
1445 (((
1446 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1447 )))
1448
1449 (((
1450 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1451 )))
1452
1453 (((
1454 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.
1455 )))
1456
1457
1458
1459 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1460
1461 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1462
1463 [[image:1653357531600-905.png]]
1464
1465
1466
1467 === 3.6.4 Analog Input Interface ===
1468
1469 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:
1470
1471
1472 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1473
1474 [[image:1653357592296-182.png]]
1475
1476 Example to connect a 4~~20mA sensor
1477
1478 We take the wind speed sensor as an example for reference only.
1479
1480
1481 **Specifications of the wind speed sensor:**
1482
1483 Red:  12~~24v
1484
1485 Yellow:  4~~20mA
1486
1487 Black:  GND
1488
1489
1490 **Connection diagram:**
1491
1492 [[image:1653357640609-758.png]]
1493
1494 [[image:1653357648330-671.png||height="155" width="733"]]
1495
1496
1497
1498 === 3.6.5 Relay Output ===
1499
1500 (((
1501 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:
1502 )))
1503
1504 [[image:image-20220524100215-9.png]]
1505
1506 [[image:image-20220524100215-10.png||height="382" width="723"]]
1507
1508
1509
1510 == 3.7 LEDs Indicators ==
1511
1512 [[image:image-20220524100748-11.png]]
1513
1514
1515 = 4. Use AT Command =
1516
1517 == 4.1 Access AT Command ==
1518
1519 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.
1520
1521 [[image:1653358238933-385.png]]
1522
1523
1524 (((
1525 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:
1526 )))
1527
1528 [[image:1653358355238-883.png]]
1529
1530
1531 (((
1532 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/]]
1533 )))
1534
1535 (((
1536 AT+<CMD>?        : Help on <CMD>
1537 )))
1538
1539 (((
1540 AT+<CMD>         : Run <CMD>
1541 )))
1542
1543 (((
1544 AT+<CMD>=<value> : Set the value
1545 )))
1546
1547 (((
1548 AT+<CMD>=?       : Get the value
1549 )))
1550
1551 (((
1552 ATZ: Trig a reset of the MCU
1553 )))
1554
1555 (((
1556 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1557 )))
1558
1559 (((
1560 AT+DEUI: Get or Set the Device EUI
1561 )))
1562
1563 (((
1564 AT+DADDR: Get or Set the Device Address
1565 )))
1566
1567 (((
1568 AT+APPKEY: Get or Set the Application Key
1569 )))
1570
1571 (((
1572 AT+NWKSKEY: Get or Set the Network Session Key
1573 )))
1574
1575 (((
1576 AT+APPSKEY: Get or Set the Application Session Key
1577 )))
1578
1579 (((
1580 AT+APPEUI: Get or Set the Application EUI
1581 )))
1582
1583 (((
1584 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1585 )))
1586
1587 (((
1588 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1589 )))
1590
1591 (((
1592 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1593 )))
1594
1595 (((
1596 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1597 )))
1598
1599 (((
1600 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1601 )))
1602
1603 (((
1604 AT+RX2FQ: Get or Set the Rx2 window frequency
1605 )))
1606
1607 (((
1608 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1609 )))
1610
1611 (((
1612 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1613 )))
1614
1615 (((
1616 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1617 )))
1618
1619 (((
1620 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1621 )))
1622
1623 (((
1624 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1625 )))
1626
1627 (((
1628 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1629 )))
1630
1631 (((
1632 AT+NWKID: Get or Set the Network ID
1633 )))
1634
1635 (((
1636 AT+FCU: Get or Set the Frame Counter Uplink
1637 )))
1638
1639 (((
1640 AT+FCD: Get or Set the Frame Counter Downlink
1641 )))
1642
1643 (((
1644 AT+CLASS: Get or Set the Device Class
1645 )))
1646
1647 (((
1648 AT+JOIN: Join network
1649 )))
1650
1651 (((
1652 AT+NJS: Get OTAA Join Status
1653 )))
1654
1655 (((
1656 AT+SENDB: Send hexadecimal data along with the application port
1657 )))
1658
1659 (((
1660 AT+SEND: Send text data along with the application port
1661 )))
1662
1663 (((
1664 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1665 )))
1666
1667 (((
1668 AT+RECV: Print last received data in raw format
1669 )))
1670
1671 (((
1672 AT+VER: Get current image version and Frequency Band
1673 )))
1674
1675 (((
1676 AT+CFM: Get or Set the confirmation mode (0-1)
1677 )))
1678
1679 (((
1680 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1681 )))
1682
1683 (((
1684 AT+SNR: Get the SNR of the last received packet
1685 )))
1686
1687 (((
1688 AT+RSSI: Get the RSSI of the last received packet
1689 )))
1690
1691 (((
1692 AT+TDC: Get or set the application data transmission interval in ms
1693 )))
1694
1695 (((
1696 AT+PORT: Get or set the application port
1697 )))
1698
1699 (((
1700 AT+DISAT: Disable AT commands
1701 )))
1702
1703 (((
1704 AT+PWORD: Set password, max 9 digits
1705 )))
1706
1707 (((
1708 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1709 )))
1710
1711 (((
1712 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1713 )))
1714
1715 (((
1716 AT+CFG: Print all settings
1717
1718
1719 )))
1720
1721
1722
1723 == 4.2 Common AT Command Sequence ==
1724
1725 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1726
1727 (((
1728
1729
1730 **If device has not joined network yet:**
1731 )))
1732
1733 (((
1734 (% style="background-color:#dcdcdc" %)123456
1735 )))
1736
1737 (((
1738 (% style="background-color:#dcdcdc" %)AT+FDR
1739 )))
1740
1741 (((
1742 (% style="background-color:#dcdcdc" %)123456
1743 )))
1744
1745 (((
1746 (% style="background-color:#dcdcdc" %)AT+NJM=0
1747 )))
1748
1749 (((
1750 (% style="background-color:#dcdcdc" %)ATZ
1751 )))
1752
1753
1754 (((
1755 **If device already joined network:**
1756 )))
1757
1758 (((
1759 (% style="background-color:#dcdcdc" %)AT+NJM=0
1760 )))
1761
1762 (((
1763 (% style="background-color:#dcdcdc" %)ATZ
1764
1765
1766 )))
1767
1768
1769
1770 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1771
1772 (((
1773
1774
1775 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1776 )))
1777
1778 (((
1779 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1780 )))
1781
1782 (((
1783 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1784 )))
1785
1786 (((
1787 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1788 )))
1789
1790 (((
1791 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1792 )))
1793
1794 (((
1795 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1796 )))
1797
1798 (((
1799 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1800 )))
1801
1802 (((
1803 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1804 )))
1805
1806 (((
1807 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1808 )))
1809
1810 (((
1811 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1812 )))
1813
1814 (((
1815 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1816 )))
1817
1818 (((
1819 (% 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.
1820 )))
1821
1822 (((
1823 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1824
1825
1826 )))
1827
1828 (((
1829 (% style="color:red" %)**Note:**
1830 )))
1831
1832 (((
1833 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1834 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1835 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.
1836 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
1837 )))
1838
1839 (((
1840 [[image:1653359097980-169.png||height="188" width="729"]]
1841 )))
1842
1843 (((
1844
1845 )))
1846
1847
1848 === 4.2.3 Change to Class A ===
1849
1850 If sensor JOINED
1851 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1852 ATZ
1853
1854
1855 = 5. FAQ =
1856
1857 == 5.1 How to upgrade the image? ==
1858
1859
1860 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1861
1862 * Support new features
1863 * For bug fix
1864 * Change LoRaWAN bands.
1865
1866 Below shows the hardware connection for how to upload an image to the LT:
1867
1868 [[image:1653359603330-121.png]]
1869
1870
1871 (((
1872 (% style="color:blue" %)**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]].
1873 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1874 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1875
1876
1877 (% style="color:blue" %)**For LT-22222-L**(%%):
1878 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.
1879 )))
1880
1881 [[image:image-20220524103407-12.png]]
1882
1883 [[image:image-20220524103429-13.png]]
1884
1885 [[image:image-20220524104033-15.png]]
1886
1887
1888 (% 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:
1889
1890 [[image:1653360054704-518.png||height="186" width="745"]]
1891
1892
1893 (((
1894 (((
1895
1896
1897 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1898 )))
1899 )))
1900
1901 (((
1902 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1903 )))
1904
1905 (((
1906
1907
1908 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1909 )))
1910
1911 (((
1912 (((
1913 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1914 )))
1915 )))
1916
1917 (((
1918 (((
1919 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1920
1921
1922 )))
1923 )))
1924
1925 (((
1926 (% 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.
1927 )))
1928
1929 (((
1930 [[image:1653360231087-571.png||height="401" width="727"]]
1931 )))
1932
1933 (((
1934 (% 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.
1935 )))
1936
1937
1938 (((
1939 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1940 )))
1941
1942 (((
1943 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1944 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1945 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1946 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1947 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1948 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1949 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1950 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1951 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1952 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1953 )))
1954
1955
1956 (((
1957 As shown in below:
1958 )))
1959
1960 [[image:1653360498588-932.png||height="485" width="726"]]
1961
1962
1963 == 5.4 Can I see counting event in Serial? ==
1964
1965 (((
1966 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.
1967
1968
1969 == 5.5 Can i use point to point communication for LT-22222-L? ==
1970
1971 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1972 )))
1973
1974 (((
1975
1976
1977 = 6. Trouble Shooting =
1978 )))
1979
1980 (((
1981 (((
1982 == 6.1 Downlink doesn’t work, how to solve it? ==
1983 )))
1984 )))
1985
1986 (((
1987 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1988 )))
1989
1990 (((
1991
1992
1993 == 6.2 Have trouble to upload image. ==
1994 )))
1995
1996 (((
1997 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1998 )))
1999
2000 (((
2001
2002
2003 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2004 )))
2005
2006 (((
2007 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2008 )))
2009
2010
2011
2012 = 7. Order Info =
2013
2014
2015 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2016
2017
2018 (% style="color:#4f81bd" %)**XXX:**
2019
2020 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2021 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2022 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2023 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2024 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2025 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2026 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2027 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2028 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2029
2030 = 8. Packing Info =
2031
2032
2033 **Package Includes**:
2034
2035 * LT-22222-L I/O Controller x 1
2036 * Stick Antenna for LoRa RF part x 1
2037 * Bracket for controller x1
2038 * Program cable x 1
2039
2040 **Dimension and weight**:
2041
2042 * Device Size: 13.5 x 7 x 3 cm
2043 * Device Weight: 105g
2044 * Package Size / pcs : 14.5 x 8 x 5 cm
2045 * Weight / pcs : 170g
2046
2047 = 9. Support =
2048
2049 * (((
2050 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.
2051 )))
2052 * (((
2053 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 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2054 )))
2055
2056 = 10. Reference​​​​​ =
2057
2058 * 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]]
2059 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2060 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2061 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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