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Version 77.77 by Xiaoling on 2022/06/10 09:24
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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
606 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
607
608 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
609 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.**
610
611
612 **AT Command to set Trigger Condition**:
613
614 (% style="color:#4f81bd" %)**Trigger base on voltage**:
615
616 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
617
618 **Example:**
619
620 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)
621
622 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
623
624
625 (% style="color:#4f81bd" %)**Trigger base on current**:
626
627 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
628
629 **Example:**
630
631 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
632
633
634 (% style="color:#4f81bd" %)**Trigger base on DI status**:
635
636 DI status trigger Flag.
637
638 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
639
640 **Example:**
641
642 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
643
644
645 **Downlink Command to set Trigger Condition**
646
647 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
648
649 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
650
651 AA: Code for this downlink Command:
652
653 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
654
655 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
656
657 yy2 yy2: AC1 or AV1 high limit.
658
659 yy3 yy3: AC2 or AV2 low limit.
660
661 Yy4 yy4: AC2 or AV2 high limit.
662
663
664 **Example1**: AA 00 13 88 00 00 00 00 00 00
665
666 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
667
668
669 **Example2**: AA 02 01 00
670
671 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
672
673
674 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
675
676 MOD6 Payload : total 11 bytes payload
677
678 [[image:image-20220524085923-1.png]]
679
680
681 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
682
683 [[image:image-20220524090106-2.png]]
684
685 * Each bits shows if the corresponding trigger has been configured.
686
687
688 **Example:**
689
690 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
691
692
693 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
694
695 [[image:image-20220524090249-3.png]]
696
697 * Each bits shows which status has been trigger on this uplink.
698
699
700 **Example:**
701
702 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
703
704
705 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
706
707 [[image:image-20220524090456-4.png]]
708
709 * Each bits shows which status has been trigger on this uplink.
710
711
712 **Example:**
713
714 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
715
716 00000101: Means both DI1 and DI2 trigger are enabled.
717
718
719 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
720
721 Downlink command to poll MOD6 status:
722
723 **AB 06**
724
725 When device got this command, it will send the MOD6 payload.
726
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
738
739 == 3.4 ​Configure LT via AT or Downlink ==
740
741 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
742
743 (((
744 There are two kinds of Commands:
745 )))
746
747 * (% 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]]
748
749 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
750
751
752
753 === 3.4.1 Common Commands ===
754
755 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]]
756
757
758
759 === 3.4.2 Sensor related commands ===
760
761 ==== 3.4.2.1 Set Transmit Interval ====
762
763 Set device uplink interval.
764
765 * AT Command:
766
767 (% class="box infomessage" %)
768 (((
769 **AT+TDC=N **
770 )))
771
772 **Example: **AT+TDC=30000. Means set interval to 30 seconds
773
774
775 * Downlink Payload (prefix 0x01):
776
777 (% class="box infomessage" %)
778 (((
779 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
780 )))
781
782
783
784 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
785
786 Set work mode.
787
788 * AT Command:
789
790 (% class="box infomessage" %)
791 (((
792 **AT+MOD=N  **
793 )))
794
795 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
796
797
798 * Downlink Payload (prefix 0x0A):
799
800 (% class="box infomessage" %)
801 (((
802 **0x0A aa     ~/~/ Same as AT+MOD=aa**
803 )))
804
805
806
807 ==== 3.4.2.3 Poll an uplink ====
808
809 * AT Command:
810
811 There is no AT Command to poll uplink
812
813
814 * Downlink Payload (prefix 0x08):
815
816 (% class="box infomessage" %)
817 (((
818 **0x08 FF     ~/~/ Poll an uplink,**
819 )))
820
821 **Example**: 0x08FF, ask device to send an Uplink
822
823
824
825 ==== 3.4.2.4 Enable Trigger Mode ====
826
827 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
828
829 * AT Command:
830
831 (% class="box infomessage" %)
832 (((
833 **AT+ADDMOD6=1 or 0**
834 )))
835
836 1: Enable Trigger Mode
837
838 0: Disable Trigger Mode
839
840
841 * Downlink Payload (prefix 0x0A 06):
842
843 (% class="box infomessage" %)
844 (((
845 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
846 )))
847
848
849
850 ==== 3.4.2.5 Poll trigger settings ====
851
852 Poll trigger settings,
853
854 * AT Command:
855
856 There is no AT Command for this feature.
857
858
859 * Downlink Payload (prefix 0x AB 06):
860
861 (% class="box infomessage" %)
862 (((
863 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
864 )))
865
866
867
868 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
869
870 Enable Disable DI1/DI2/DI2 as trigger,
871
872 * AT Command:
873
874 (% class="box infomessage" %)
875 (((
876 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
877 )))
878
879
880 **Example:**
881
882 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
883
884 * Downlink Payload (prefix 0xAA 02):
885
886 (% class="box infomessage" %)
887 (((
888 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
889 )))
890
891
892
893 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
894
895 Set DI1 or DI3(for LT-33222-L) trigger.
896
897 * AT Command:
898
899 (% class="box infomessage" %)
900 (((
901 **AT+TRIG1=a,b**
902 )))
903
904 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
905
906 b : delay timing.
907
908
909 **Example:**
910
911 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
912
913
914 * Downlink Payload (prefix 0x09 01 ):
915
916 (% class="box infomessage" %)
917 (((
918 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
919 )))
920
921
922
923 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
924
925 Set DI2 trigger.
926
927 * AT Command:
928
929 (% class="box infomessage" %)
930 (((
931 **AT+TRIG2=a,b**
932 )))
933
934 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
935
936 b : delay timing.
937
938
939 **Example:**
940
941 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
942
943
944 * Downlink Payload (prefix 0x09 02 ):
945
946 (% class="box infomessage" %)
947 (((
948 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
949 )))
950
951
952
953 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
954
955 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
956
957 * AT Command:
958
959 (% class="box infomessage" %)
960 (((
961 **AT+ACLIM. **
962 )))
963
964
965 * Downlink Payload (prefix 0xAA 01 ):
966
967 (% class="box infomessage" %)
968 (((
969 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
970 )))
971
972
973
974 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
975
976 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
977
978 * AT Command:
979
980 (% class="box infomessage" %)
981 (((
982 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
983 )))
984
985
986 * Downlink Payload (prefix 0xAA 00 ):
987
988 (% class="box infomessage" %)
989 (((
990 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
991 )))
992
993
994
995 ==== 3.4.2.11 Trigger – Set minimum interval ====
996
997 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
998
999 * AT Command:
1000
1001 (% class="box infomessage" %)
1002 (((
1003 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1004 )))
1005
1006
1007 * Downlink Payload (prefix 0xAC ):
1008
1009 (% class="box infomessage" %)
1010 (((
1011 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1012 )))
1013
1014
1015
1016 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1017
1018 * AT Command:
1019
1020 There is no AT Command to control Digital Output
1021
1022
1023 * Downlink Payload (prefix 0x02):
1024
1025 (% class="box infomessage" %)
1026 (((
1027 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1028 )))
1029
1030 (((
1031 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1032 )))
1033
1034 (((
1035 01: Low,  00: High ,  11: No action
1036 )))
1037
1038 [[image:image-20220524092754-5.png]]
1039
1040 (((
1041 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1042 )))
1043
1044 (((
1045 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1046 )))
1047
1048
1049
1050 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1051
1052 * AT Command:
1053
1054 There is no AT Command to control Digital Output
1055
1056
1057 * Downlink Payload (prefix 0xA9):
1058
1059 (% class="box infomessage" %)
1060 (((
1061 (((
1062 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1063 )))
1064 )))
1065
1066 This is to control the digital output time of DO pin. Include four bytes:
1067
1068 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1069
1070 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1071
1072 01: DO pins will change back to original state after timeout.
1073
1074 00: DO pins will change to an inverter state after timeout 
1075
1076
1077 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1078
1079 [[image:image-20220524093238-6.png]]
1080
1081
1082 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1083
1084 [[image:image-20220524093328-7.png]]
1085
1086
1087 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1088
1089 [[image:image-20220524093351-8.png]]
1090
1091
1092 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1093
1094 Latching time. Unit: ms
1095
1096 Device will upload a packet if downlink code executes successfully.
1097
1098
1099 **Example payload:**
1100
1101 **~1. A9 01 01 01 01 07 D0**
1102
1103 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1104
1105 **2. A9 01 00 01 11 07 D0**
1106
1107 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1108
1109 **3. A9 00 00 00 00 07 D0**
1110
1111 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1112
1113 **4. A9 00 11 01 00 07 D0**
1114
1115 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
1116
1117
1118
1119 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1120
1121 * AT Command:
1122
1123 There is no AT Command to control Relay Output
1124
1125
1126 * Downlink Payload (prefix 0x03):
1127
1128 (% class="box infomessage" %)
1129 (((
1130 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1131 )))
1132
1133 (((
1134 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1135 )))
1136
1137 (((
1138 01: Close ,  00: Open , 11: No action
1139 )))
1140
1141 (((
1142 [[image:image-20220524093724-9.png]]
1143 )))
1144
1145 Device will upload a packet if downlink code executes successfully.
1146
1147
1148
1149 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1150
1151 * AT Command:
1152
1153 There is no AT Command to control Relay Output
1154
1155
1156 * Downlink Payload (prefix 0x05):
1157
1158 (% class="box infomessage" %)
1159 (((
1160 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1161 )))
1162
1163 This is to control the relay output time of relay. Include four bytes:
1164
1165 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1166
1167 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1168
1169 01: Relays will change back to original state after timeout.
1170
1171 00: Relays will change to an inverter state after timeout
1172
1173
1174 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1175
1176 [[image:image-20220524093831-10.png]]
1177
1178
1179 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1180
1181 Device will upload a packet if downlink code executes successfully.
1182
1183
1184 **Example payload:**
1185
1186 **~1. 05 01 11 07 D0**
1187
1188 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1189
1190 **2. 05 01 10 07 D0**
1191
1192 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1193
1194 **3. 05 00 01 07 D0**
1195
1196 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1197
1198 **4. 05 00 00 07 D0**
1199
1200 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1201
1202
1203
1204 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1205
1206 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1207
1208 * AT Command:
1209
1210 (% class="box infomessage" %)
1211 (((
1212 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1213 )))
1214
1215
1216 * Downlink Payload (prefix 0xA5):
1217
1218 (% class="box infomessage" %)
1219 (((
1220 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1221 )))
1222
1223
1224
1225 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1226
1227 * AT Command:
1228
1229 (% class="box infomessage" %)
1230 (((
1231 **AT+SETCNT=aa,(bb cc dd ee) **
1232 )))
1233
1234 aa: 1: Set count1,
1235
1236 2: Set count2,
1237
1238 3: Set AV1 count
1239
1240 Bb cc dd ee: number to be set
1241
1242
1243 * Downlink Payload (prefix 0xA8):
1244
1245 (% class="box infomessage" %)
1246 (((
1247 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1248 )))
1249
1250
1251
1252 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1253
1254 Clear counting for counting mode
1255
1256 * AT Command:
1257
1258 (% class="box infomessage" %)
1259 (((
1260 **AT+CLRCOUNT ~/~/ clear all counting**
1261 )))
1262
1263 * Downlink Payload (prefix 0xA6):
1264
1265 (% class="box infomessage" %)
1266 (((
1267 **0x A6 01     ~/~/ clear all counting,**
1268 )))
1269
1270
1271
1272 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1273
1274 * AT Command:
1275
1276 (% class="box infomessage" %)
1277 (((
1278 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1279 )))
1280
1281 * Downlink Payload (prefix 0xA7):
1282
1283 (% class="box infomessage" %)
1284 (((
1285 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1286 )))
1287
1288 (((
1289 range: aa bb cc:0 to 16777215,  (unit:second)
1290
1291
1292 )))
1293
1294
1295 == 3.5 Integrate with Mydevice ==
1296
1297 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:
1298
1299 (((
1300 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1301 )))
1302
1303 (((
1304 (% 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:
1305 )))
1306
1307 [[image:1653356737703-362.png||height="232" width="732"]]
1308
1309 [[image:image-20220524094641-11.png||height="390" width="723"]]
1310
1311
1312 [[image:image-20220524094641-12.png||height="402" width="718"]]
1313
1314
1315 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1316
1317 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1318
1319 Search under The things network
1320
1321 [[image:1653356838789-523.png||height="337" width="740"]]
1322
1323
1324
1325 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1326
1327 [[image:image-20220524094909-1.png||height="335" width="729"]]
1328
1329
1330 [[image:image-20220524094909-2.png||height="337" width="729"]]
1331
1332
1333 [[image:image-20220524094909-3.png||height="338" width="727"]]
1334
1335
1336 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1337
1338
1339 [[image:image-20220524094909-5.png||height="341" width="734"]]
1340
1341
1342
1343 == 3.6 Interface Detail ==
1344
1345 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1346
1347 Support NPN Type sensor
1348
1349 [[image:1653356991268-289.png]]
1350
1351
1352
1353 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1354
1355 (((
1356 The DI port of LT-22222-L can support NPN or PNP output sensor.
1357 )))
1358
1359 (((
1360 (((
1361 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
1362 )))
1363 )))
1364
1365 [[image:1653357170703-587.png]]
1366
1367 (((
1368 (((
1369 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1370 )))
1371 )))
1372
1373 (((
1374
1375 )))
1376
1377 (((
1378 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1379 )))
1380
1381 (((
1382 This type of sensor will output a low signal GND when active.
1383 )))
1384
1385 * (((
1386 Connect sensor’s output to DI1-
1387 )))
1388 * (((
1389 Connect sensor’s VCC to DI1+.
1390 )))
1391
1392 (((
1393 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1394 )))
1395
1396 (((
1397 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1398 )))
1399
1400 (((
1401 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.
1402 )))
1403
1404 (((
1405
1406 )))
1407
1408 (((
1409 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1410 )))
1411
1412 (((
1413 This type of sensor will output a high signal (example 24v) when active.
1414 )))
1415
1416 * (((
1417 Connect sensor’s output to DI1+
1418 )))
1419 * (((
1420 Connect sensor’s GND DI1-.
1421 )))
1422
1423 (((
1424 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1425 )))
1426
1427 (((
1428 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1429 )))
1430
1431 (((
1432 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.
1433 )))
1434
1435 (((
1436
1437 )))
1438
1439 (((
1440 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1441 )))
1442
1443 (((
1444 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1445 )))
1446
1447 * (((
1448 Connect sensor’s output to DI1+ with a serial 50K resistor
1449 )))
1450 * (((
1451 Connect sensor’s GND DI1-.
1452 )))
1453
1454 (((
1455 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1456 )))
1457
1458 (((
1459 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1460 )))
1461
1462 (((
1463 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.
1464 )))
1465
1466
1467
1468 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1469
1470 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1471
1472 [[image:1653357531600-905.png]]
1473
1474
1475
1476 === 3.6.4 Analog Input Interface ===
1477
1478 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:
1479
1480
1481 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1482
1483 [[image:1653357592296-182.png]]
1484
1485 Example to connect a 4~~20mA sensor
1486
1487 We take the wind speed sensor as an example for reference only.
1488
1489
1490 **Specifications of the wind speed sensor:**
1491
1492 Red:  12~~24v
1493
1494 Yellow:  4~~20mA
1495
1496 Black:  GND
1497
1498
1499 **Connection diagram:**
1500
1501 [[image:1653357640609-758.png]]
1502
1503 [[image:1653357648330-671.png||height="155" width="733"]]
1504
1505
1506
1507 === 3.6.5 Relay Output ===
1508
1509 (((
1510 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:
1511 )))
1512
1513 [[image:image-20220524100215-9.png]]
1514
1515 [[image:image-20220524100215-10.png||height="382" width="723"]]
1516
1517
1518
1519 == 3.7 LEDs Indicators ==
1520
1521 [[image:image-20220524100748-11.png]]
1522
1523
1524 = 4. Use AT Command =
1525
1526 == 4.1 Access AT Command ==
1527
1528 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.
1529
1530 [[image:1653358238933-385.png]]
1531
1532
1533 (((
1534 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:
1535 )))
1536
1537 [[image:1653358355238-883.png]]
1538
1539
1540 (((
1541 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/]]
1542 )))
1543
1544 (((
1545 AT+<CMD>?        : Help on <CMD>
1546 )))
1547
1548 (((
1549 AT+<CMD>         : Run <CMD>
1550 )))
1551
1552 (((
1553 AT+<CMD>=<value> : Set the value
1554 )))
1555
1556 (((
1557 AT+<CMD>=?       : Get the value
1558 )))
1559
1560 (((
1561 ATZ: Trig a reset of the MCU
1562 )))
1563
1564 (((
1565 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1566 )))
1567
1568 (((
1569 AT+DEUI: Get or Set the Device EUI
1570 )))
1571
1572 (((
1573 AT+DADDR: Get or Set the Device Address
1574 )))
1575
1576 (((
1577 AT+APPKEY: Get or Set the Application Key
1578 )))
1579
1580 (((
1581 AT+NWKSKEY: Get or Set the Network Session Key
1582 )))
1583
1584 (((
1585 AT+APPSKEY: Get or Set the Application Session Key
1586 )))
1587
1588 (((
1589 AT+APPEUI: Get or Set the Application EUI
1590 )))
1591
1592 (((
1593 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1594 )))
1595
1596 (((
1597 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1598 )))
1599
1600 (((
1601 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1602 )))
1603
1604 (((
1605 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1606 )))
1607
1608 (((
1609 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1610 )))
1611
1612 (((
1613 AT+RX2FQ: Get or Set the Rx2 window frequency
1614 )))
1615
1616 (((
1617 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1618 )))
1619
1620 (((
1621 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1622 )))
1623
1624 (((
1625 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1626 )))
1627
1628 (((
1629 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1630 )))
1631
1632 (((
1633 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1634 )))
1635
1636 (((
1637 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1638 )))
1639
1640 (((
1641 AT+NWKID: Get or Set the Network ID
1642 )))
1643
1644 (((
1645 AT+FCU: Get or Set the Frame Counter Uplink
1646 )))
1647
1648 (((
1649 AT+FCD: Get or Set the Frame Counter Downlink
1650 )))
1651
1652 (((
1653 AT+CLASS: Get or Set the Device Class
1654 )))
1655
1656 (((
1657 AT+JOIN: Join network
1658 )))
1659
1660 (((
1661 AT+NJS: Get OTAA Join Status
1662 )))
1663
1664 (((
1665 AT+SENDB: Send hexadecimal data along with the application port
1666 )))
1667
1668 (((
1669 AT+SEND: Send text data along with the application port
1670 )))
1671
1672 (((
1673 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1674 )))
1675
1676 (((
1677 AT+RECV: Print last received data in raw format
1678 )))
1679
1680 (((
1681 AT+VER: Get current image version and Frequency Band
1682 )))
1683
1684 (((
1685 AT+CFM: Get or Set the confirmation mode (0-1)
1686 )))
1687
1688 (((
1689 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1690 )))
1691
1692 (((
1693 AT+SNR: Get the SNR of the last received packet
1694 )))
1695
1696 (((
1697 AT+RSSI: Get the RSSI of the last received packet
1698 )))
1699
1700 (((
1701 AT+TDC: Get or set the application data transmission interval in ms
1702 )))
1703
1704 (((
1705 AT+PORT: Get or set the application port
1706 )))
1707
1708 (((
1709 AT+DISAT: Disable AT commands
1710 )))
1711
1712 (((
1713 AT+PWORD: Set password, max 9 digits
1714 )))
1715
1716 (((
1717 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1718 )))
1719
1720 (((
1721 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1722 )))
1723
1724 (((
1725 AT+CFG: Print all settings
1726
1727
1728 )))
1729
1730
1731
1732 == 4.2 Common AT Command Sequence ==
1733
1734 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1735
1736 (((
1737
1738
1739 **If device has not joined network yet:**
1740 )))
1741
1742 (((
1743 (% style="background-color:#dcdcdc" %)123456
1744 )))
1745
1746 (((
1747 (% style="background-color:#dcdcdc" %)AT+FDR
1748 )))
1749
1750 (((
1751 (% style="background-color:#dcdcdc" %)123456
1752 )))
1753
1754 (((
1755 (% style="background-color:#dcdcdc" %)AT+NJM=0
1756 )))
1757
1758 (((
1759 (% style="background-color:#dcdcdc" %)ATZ
1760 )))
1761
1762
1763 (((
1764 **If device already joined network:**
1765 )))
1766
1767 (((
1768 (% style="background-color:#dcdcdc" %)AT+NJM=0
1769 )))
1770
1771 (((
1772 (% style="background-color:#dcdcdc" %)ATZ
1773
1774
1775 )))
1776
1777
1778
1779 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1780
1781 (((
1782
1783
1784 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1785 )))
1786
1787 (((
1788 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1789 )))
1790
1791 (((
1792 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1793 )))
1794
1795 (((
1796 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1797 )))
1798
1799 (((
1800 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1801 )))
1802
1803 (((
1804 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1805 )))
1806
1807 (((
1808 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1809 )))
1810
1811 (((
1812 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1813 )))
1814
1815 (((
1816 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1817 )))
1818
1819 (((
1820 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1821 )))
1822
1823 (((
1824 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1825 )))
1826
1827 (((
1828 (% 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.
1829 )))
1830
1831 (((
1832 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1833
1834
1835 )))
1836
1837 (((
1838 (% style="color:red" %)**Note:**
1839 )))
1840
1841 (((
1842 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1843 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1844 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.
1845 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
1846 )))
1847
1848 (((
1849 [[image:1653359097980-169.png||height="188" width="729"]]
1850 )))
1851
1852 (((
1853
1854 )))
1855
1856
1857 === 4.2.3 Change to Class A ===
1858
1859 If sensor JOINED
1860 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1861 ATZ
1862
1863
1864 = 5. FAQ =
1865
1866 == 5.1 How to upgrade the image? ==
1867
1868
1869 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1870
1871 * Support new features
1872 * For bug fix
1873 * Change LoRaWAN bands.
1874
1875 Below shows the hardware connection for how to upload an image to the LT:
1876
1877 [[image:1653359603330-121.png]]
1878
1879
1880 (((
1881 (% 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]].
1882 (% 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/]].
1883 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1884
1885
1886 (% style="color:blue" %)**For LT-22222-L**(%%):
1887 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.
1888 )))
1889
1890 [[image:image-20220524103407-12.png]]
1891
1892 [[image:image-20220524103429-13.png]]
1893
1894 [[image:image-20220524104033-15.png]]
1895
1896
1897 (% 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:
1898
1899 [[image:1653360054704-518.png||height="186" width="745"]]
1900
1901
1902 (((
1903 (((
1904
1905
1906 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1907 )))
1908 )))
1909
1910 (((
1911 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1912 )))
1913
1914 (((
1915
1916
1917 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1918 )))
1919
1920 (((
1921 (((
1922 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1923 )))
1924 )))
1925
1926 (((
1927 (((
1928 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1929
1930
1931 )))
1932 )))
1933
1934 (((
1935 (% 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.
1936 )))
1937
1938 (((
1939 [[image:1653360231087-571.png||height="401" width="727"]]
1940 )))
1941
1942 (((
1943 (% 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.
1944 )))
1945
1946
1947 (((
1948 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1949 )))
1950
1951 (((
1952 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1953 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1954 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1955 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1956 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1957 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1958 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1959 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1960 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1961 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1962 )))
1963
1964
1965 (((
1966 As shown in below:
1967 )))
1968
1969 [[image:1653360498588-932.png||height="485" width="726"]]
1970
1971
1972 == 5.4 Can I see counting event in Serial? ==
1973
1974 (((
1975 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.
1976
1977
1978 == 5.5 Can i use point to point communication for LT-22222-L? ==
1979
1980 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1981 )))
1982
1983 (((
1984
1985
1986 = 6. Trouble Shooting =
1987 )))
1988
1989 (((
1990 (((
1991 == 6.1 Downlink doesn’t work, how to solve it? ==
1992 )))
1993 )))
1994
1995 (((
1996 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1997 )))
1998
1999 (((
2000
2001
2002 == 6.2 Have trouble to upload image. ==
2003 )))
2004
2005 (((
2006 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2007 )))
2008
2009 (((
2010
2011
2012 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2013 )))
2014
2015 (((
2016 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2017 )))
2018
2019
2020
2021 = 7. Order Info =
2022
2023
2024 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2025
2026
2027 (% style="color:#4f81bd" %)**XXX:**
2028
2029 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2030 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2031 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2032 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2033 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2034 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2035 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2036 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2037 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2038
2039 = 8. Packing Info =
2040
2041
2042 **Package Includes**:
2043
2044 * LT-22222-L I/O Controller x 1
2045 * Stick Antenna for LoRa RF part x 1
2046 * Bracket for controller x1
2047 * Program cable x 1
2048
2049 **Dimension and weight**:
2050
2051 * Device Size: 13.5 x 7 x 3 cm
2052 * Device Weight: 105g
2053 * Package Size / pcs : 14.5 x 8 x 5 cm
2054 * Weight / pcs : 170g
2055
2056 = 9. Support =
2057
2058 * (((
2059 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.
2060 )))
2061 * (((
2062 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]]
2063 )))
2064
2065 = 10. Reference​​​​​ =
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 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2069 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2070 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]