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Version 77.76 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 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
611 **AT Command to set Trigger Condition**:
612
613 (% style="color:#4f81bd" %)**Trigger base on voltage**:
614
615 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
616
617 **Example:**
618
619 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)
620
621 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
622
623
624 (% style="color:#4f81bd" %)**Trigger base on current**:
625
626 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
627
628 **Example:**
629
630 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
631
632
633 (% style="color:#4f81bd" %)**Trigger base on DI status**:
634
635 DI status trigger Flag.
636
637 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
638
639 **Example:**
640
641 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
642
643
644 **Downlink Command to set Trigger Condition**
645
646 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
647
648 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
649
650 AA: Code for this downlink Command:
651
652 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
653
654 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
655
656 yy2 yy2: AC1 or AV1 high limit.
657
658 yy3 yy3: AC2 or AV2 low limit.
659
660 Yy4 yy4: AC2 or AV2 high limit.
661
662
663 **Example1**: AA 00 13 88 00 00 00 00 00 00
664
665 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
666
667
668 **Example2**: AA 02 01 00
669
670 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
671
672
673 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
674
675 MOD6 Payload : total 11 bytes payload
676
677 [[image:image-20220524085923-1.png]]
678
679
680 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
681
682 [[image:image-20220524090106-2.png]]
683
684 * Each bits shows if the corresponding trigger has been configured.
685
686
687 **Example:**
688
689 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
690
691
692 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
693
694 [[image:image-20220524090249-3.png]]
695
696 * Each bits shows which status has been trigger on this uplink.
697
698
699 **Example:**
700
701 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
702
703
704 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
705
706 [[image:image-20220524090456-4.png]]
707
708 * Each bits shows which status has been trigger on this uplink.
709
710
711 **Example:**
712
713 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
714
715 00000101: Means both DI1 and DI2 trigger are enabled.
716
717
718 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
719
720 Downlink command to poll MOD6 status:
721
722 **AB 06**
723
724 When device got this command, it will send the MOD6 payload.
725
726
727
728 === 3.3.7 Payload Decoder ===
729
730 (((
731 **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/]]
732
733
734 )))
735
736
737
738 == 3.4 ​Configure LT via AT or Downlink ==
739
740 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
741
742 (((
743 There are two kinds of Commands:
744 )))
745
746 * (% 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]]
747
748 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
749
750
751
752 === 3.4.1 Common Commands ===
753
754 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]]
755
756
757
758 === 3.4.2 Sensor related commands ===
759
760 ==== 3.4.2.1 Set Transmit Interval ====
761
762 Set device uplink interval.
763
764 * AT Command:
765
766 (% class="box infomessage" %)
767 (((
768 **AT+TDC=N **
769 )))
770
771 **Example: **AT+TDC=30000. Means set interval to 30 seconds
772
773
774 * Downlink Payload (prefix 0x01):
775
776 (% class="box infomessage" %)
777 (((
778 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
779 )))
780
781
782
783 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
784
785 Set work mode.
786
787 * AT Command:
788
789 (% class="box infomessage" %)
790 (((
791 **AT+MOD=N  **
792 )))
793
794 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
795
796
797 * Downlink Payload (prefix 0x0A):
798
799 (% class="box infomessage" %)
800 (((
801 **0x0A aa     ~/~/ Same as AT+MOD=aa**
802 )))
803
804
805
806 ==== 3.4.2.3 Poll an uplink ====
807
808 * AT Command:
809
810 There is no AT Command to poll uplink
811
812
813 * Downlink Payload (prefix 0x08):
814
815 (% class="box infomessage" %)
816 (((
817 **0x08 FF     ~/~/ Poll an uplink,**
818 )))
819
820 **Example**: 0x08FF, ask device to send an Uplink
821
822
823
824 ==== 3.4.2.4 Enable Trigger Mode ====
825
826 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
827
828 * AT Command:
829
830 (% class="box infomessage" %)
831 (((
832 **AT+ADDMOD6=1 or 0**
833 )))
834
835 1: Enable Trigger Mode
836
837 0: Disable Trigger Mode
838
839
840 * Downlink Payload (prefix 0x0A 06):
841
842 (% class="box infomessage" %)
843 (((
844 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
845 )))
846
847
848
849 ==== 3.4.2.5 Poll trigger settings ====
850
851 Poll trigger settings,
852
853 * AT Command:
854
855 There is no AT Command for this feature.
856
857
858 * Downlink Payload (prefix 0x AB 06):
859
860 (% class="box infomessage" %)
861 (((
862 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
863 )))
864
865
866
867 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
868
869 Enable Disable DI1/DI2/DI2 as trigger,
870
871 * AT Command:
872
873 (% class="box infomessage" %)
874 (((
875 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
876 )))
877
878
879 **Example:**
880
881 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
882
883 * Downlink Payload (prefix 0xAA 02):
884
885 (% class="box infomessage" %)
886 (((
887 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
888 )))
889
890
891
892 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
893
894 Set DI1 or DI3(for LT-33222-L) trigger.
895
896 * AT Command:
897
898 (% class="box infomessage" %)
899 (((
900 **AT+TRIG1=a,b**
901 )))
902
903 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
904
905 b : delay timing.
906
907
908 **Example:**
909
910 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
911
912
913 * Downlink Payload (prefix 0x09 01 ):
914
915 (% class="box infomessage" %)
916 (((
917 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
918 )))
919
920
921
922 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
923
924 Set DI2 trigger.
925
926 * AT Command:
927
928 (% class="box infomessage" %)
929 (((
930 **AT+TRIG2=a,b**
931 )))
932
933 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
934
935 b : delay timing.
936
937
938 **Example:**
939
940 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
941
942
943 * Downlink Payload (prefix 0x09 02 ):
944
945 (% class="box infomessage" %)
946 (((
947 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
948 )))
949
950
951
952 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
953
954 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
955
956 * AT Command:
957
958 (% class="box infomessage" %)
959 (((
960 **AT+ACLIM. **
961 )))
962
963
964 * Downlink Payload (prefix 0xAA 01 ):
965
966 (% class="box infomessage" %)
967 (((
968 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
969 )))
970
971
972
973 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
974
975 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
976
977 * AT Command:
978
979 (% class="box infomessage" %)
980 (((
981 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
982 )))
983
984
985 * Downlink Payload (prefix 0xAA 00 ):
986
987 (% class="box infomessage" %)
988 (((
989 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
990 )))
991
992
993
994 ==== 3.4.2.11 Trigger – Set minimum interval ====
995
996 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
997
998 * AT Command:
999
1000 (% class="box infomessage" %)
1001 (((
1002 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1003 )))
1004
1005
1006 * Downlink Payload (prefix 0xAC ):
1007
1008 (% class="box infomessage" %)
1009 (((
1010 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1011 )))
1012
1013
1014
1015 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1016
1017 * AT Command:
1018
1019 There is no AT Command to control Digital Output
1020
1021
1022 * Downlink Payload (prefix 0x02):
1023
1024 (% class="box infomessage" %)
1025 (((
1026 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1027 )))
1028
1029 (((
1030 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1031 )))
1032
1033 (((
1034 01: Low,  00: High ,  11: No action
1035 )))
1036
1037 [[image:image-20220524092754-5.png]]
1038
1039 (((
1040 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1041 )))
1042
1043 (((
1044 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1045 )))
1046
1047
1048
1049 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1050
1051 * AT Command:
1052
1053 There is no AT Command to control Digital Output
1054
1055
1056 * Downlink Payload (prefix 0xA9):
1057
1058 (% class="box infomessage" %)
1059 (((
1060 (((
1061 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1062 )))
1063 )))
1064
1065 This is to control the digital output time of DO pin. Include four bytes:
1066
1067 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1068
1069 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1070
1071 01: DO pins will change back to original state after timeout.
1072
1073 00: DO pins will change to an inverter state after timeout 
1074
1075
1076 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1077
1078 [[image:image-20220524093238-6.png]]
1079
1080
1081 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1082
1083 [[image:image-20220524093328-7.png]]
1084
1085
1086 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1087
1088 [[image:image-20220524093351-8.png]]
1089
1090
1091 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1092
1093 Latching time. Unit: ms
1094
1095 Device will upload a packet if downlink code executes successfully.
1096
1097
1098 **Example payload:**
1099
1100 **~1. A9 01 01 01 01 07 D0**
1101
1102 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1103
1104 **2. A9 01 00 01 11 07 D0**
1105
1106 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1107
1108 **3. A9 00 00 00 00 07 D0**
1109
1110 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1111
1112 **4. A9 00 11 01 00 07 D0**
1113
1114 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
1115
1116
1117
1118 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1119
1120 * AT Command:
1121
1122 There is no AT Command to control Relay Output
1123
1124
1125 * Downlink Payload (prefix 0x03):
1126
1127 (% class="box infomessage" %)
1128 (((
1129 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1130 )))
1131
1132 (((
1133 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1134 )))
1135
1136 (((
1137 01: Close ,  00: Open , 11: No action
1138 )))
1139
1140 (((
1141 [[image:image-20220524093724-9.png]]
1142 )))
1143
1144 Device will upload a packet if downlink code executes successfully.
1145
1146
1147
1148 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1149
1150 * AT Command:
1151
1152 There is no AT Command to control Relay Output
1153
1154
1155 * Downlink Payload (prefix 0x05):
1156
1157 (% class="box infomessage" %)
1158 (((
1159 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1160 )))
1161
1162 This is to control the relay output time of relay. Include four bytes:
1163
1164 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1165
1166 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1167
1168 01: Relays will change back to original state after timeout.
1169
1170 00: Relays will change to an inverter state after timeout
1171
1172
1173 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1174
1175 [[image:image-20220524093831-10.png]]
1176
1177
1178 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1179
1180 Device will upload a packet if downlink code executes successfully.
1181
1182
1183 **Example payload:**
1184
1185 **~1. 05 01 11 07 D0**
1186
1187 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1188
1189 **2. 05 01 10 07 D0**
1190
1191 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1192
1193 **3. 05 00 01 07 D0**
1194
1195 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1196
1197 **4. 05 00 00 07 D0**
1198
1199 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1200
1201
1202
1203 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1204
1205 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1206
1207 * AT Command:
1208
1209 (% class="box infomessage" %)
1210 (((
1211 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1212 )))
1213
1214
1215 * Downlink Payload (prefix 0xA5):
1216
1217 (% class="box infomessage" %)
1218 (((
1219 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1220 )))
1221
1222
1223
1224 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1225
1226 * AT Command:
1227
1228 (% class="box infomessage" %)
1229 (((
1230 **AT+SETCNT=aa,(bb cc dd ee) **
1231 )))
1232
1233 aa: 1: Set count1,
1234
1235 2: Set count2,
1236
1237 3: Set AV1 count
1238
1239 Bb cc dd ee: number to be set
1240
1241
1242 * Downlink Payload (prefix 0xA8):
1243
1244 (% class="box infomessage" %)
1245 (((
1246 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1247 )))
1248
1249
1250
1251 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1252
1253 Clear counting for counting mode
1254
1255 * AT Command:
1256
1257 (% class="box infomessage" %)
1258 (((
1259 **AT+CLRCOUNT ~/~/ clear all counting**
1260 )))
1261
1262 * Downlink Payload (prefix 0xA6):
1263
1264 (% class="box infomessage" %)
1265 (((
1266 **0x A6 01     ~/~/ clear all counting,**
1267 )))
1268
1269
1270
1271 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1272
1273 * AT Command:
1274
1275 (% class="box infomessage" %)
1276 (((
1277 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1278 )))
1279
1280 * Downlink Payload (prefix 0xA7):
1281
1282 (% class="box infomessage" %)
1283 (((
1284 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1285 )))
1286
1287 (((
1288 range: aa bb cc:0 to 16777215,  (unit:second)
1289
1290
1291 )))
1292
1293
1294 == 3.5 Integrate with Mydevice ==
1295
1296 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:
1297
1298 (((
1299 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1300 )))
1301
1302 (((
1303 (% 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:
1304 )))
1305
1306 [[image:1653356737703-362.png||height="232" width="732"]]
1307
1308 [[image:image-20220524094641-11.png||height="390" width="723"]]
1309
1310
1311 [[image:image-20220524094641-12.png||height="402" width="718"]]
1312
1313
1314 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1315
1316 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1317
1318 Search under The things network
1319
1320 [[image:1653356838789-523.png||height="337" width="740"]]
1321
1322
1323
1324 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1325
1326 [[image:image-20220524094909-1.png||height="335" width="729"]]
1327
1328
1329 [[image:image-20220524094909-2.png||height="337" width="729"]]
1330
1331
1332 [[image:image-20220524094909-3.png||height="338" width="727"]]
1333
1334
1335 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1336
1337
1338 [[image:image-20220524094909-5.png||height="341" width="734"]]
1339
1340
1341
1342 == 3.6 Interface Detail ==
1343
1344 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1345
1346 Support NPN Type sensor
1347
1348 [[image:1653356991268-289.png]]
1349
1350
1351
1352 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1353
1354 (((
1355 The DI port of LT-22222-L can support NPN or PNP output sensor.
1356 )))
1357
1358 (((
1359 (((
1360 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
1361 )))
1362 )))
1363
1364 [[image:1653357170703-587.png]]
1365
1366 (((
1367 (((
1368 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1369 )))
1370 )))
1371
1372 (((
1373
1374 )))
1375
1376 (((
1377 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1378 )))
1379
1380 (((
1381 This type of sensor will output a low signal GND when active.
1382 )))
1383
1384 * (((
1385 Connect sensor’s output to DI1-
1386 )))
1387 * (((
1388 Connect sensor’s VCC to DI1+.
1389 )))
1390
1391 (((
1392 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1393 )))
1394
1395 (((
1396 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1397 )))
1398
1399 (((
1400 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.
1401 )))
1402
1403 (((
1404
1405 )))
1406
1407 (((
1408 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1409 )))
1410
1411 (((
1412 This type of sensor will output a high signal (example 24v) when active.
1413 )))
1414
1415 * (((
1416 Connect sensor’s output to DI1+
1417 )))
1418 * (((
1419 Connect sensor’s GND DI1-.
1420 )))
1421
1422 (((
1423 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1424 )))
1425
1426 (((
1427 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1428 )))
1429
1430 (((
1431 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.
1432 )))
1433
1434 (((
1435
1436 )))
1437
1438 (((
1439 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1440 )))
1441
1442 (((
1443 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1444 )))
1445
1446 * (((
1447 Connect sensor’s output to DI1+ with a serial 50K resistor
1448 )))
1449 * (((
1450 Connect sensor’s GND DI1-.
1451 )))
1452
1453 (((
1454 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1455 )))
1456
1457 (((
1458 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1459 )))
1460
1461 (((
1462 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.
1463 )))
1464
1465
1466
1467 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1468
1469 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1470
1471 [[image:1653357531600-905.png]]
1472
1473
1474
1475 === 3.6.4 Analog Input Interface ===
1476
1477 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:
1478
1479
1480 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1481
1482 [[image:1653357592296-182.png]]
1483
1484 Example to connect a 4~~20mA sensor
1485
1486 We take the wind speed sensor as an example for reference only.
1487
1488
1489 **Specifications of the wind speed sensor:**
1490
1491 Red:  12~~24v
1492
1493 Yellow:  4~~20mA
1494
1495 Black:  GND
1496
1497
1498 **Connection diagram:**
1499
1500 [[image:1653357640609-758.png]]
1501
1502 [[image:1653357648330-671.png||height="155" width="733"]]
1503
1504
1505
1506 === 3.6.5 Relay Output ===
1507
1508 (((
1509 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:
1510 )))
1511
1512 [[image:image-20220524100215-9.png]]
1513
1514 [[image:image-20220524100215-10.png||height="382" width="723"]]
1515
1516
1517
1518 == 3.7 LEDs Indicators ==
1519
1520 [[image:image-20220524100748-11.png]]
1521
1522
1523 = 4. Use AT Command =
1524
1525 == 4.1 Access AT Command ==
1526
1527 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.
1528
1529 [[image:1653358238933-385.png]]
1530
1531
1532 (((
1533 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:
1534 )))
1535
1536 [[image:1653358355238-883.png]]
1537
1538
1539 (((
1540 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/]]
1541 )))
1542
1543 (((
1544 AT+<CMD>?        : Help on <CMD>
1545 )))
1546
1547 (((
1548 AT+<CMD>         : Run <CMD>
1549 )))
1550
1551 (((
1552 AT+<CMD>=<value> : Set the value
1553 )))
1554
1555 (((
1556 AT+<CMD>=?       : Get the value
1557 )))
1558
1559 (((
1560 ATZ: Trig a reset of the MCU
1561 )))
1562
1563 (((
1564 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1565 )))
1566
1567 (((
1568 AT+DEUI: Get or Set the Device EUI
1569 )))
1570
1571 (((
1572 AT+DADDR: Get or Set the Device Address
1573 )))
1574
1575 (((
1576 AT+APPKEY: Get or Set the Application Key
1577 )))
1578
1579 (((
1580 AT+NWKSKEY: Get or Set the Network Session Key
1581 )))
1582
1583 (((
1584 AT+APPSKEY: Get or Set the Application Session Key
1585 )))
1586
1587 (((
1588 AT+APPEUI: Get or Set the Application EUI
1589 )))
1590
1591 (((
1592 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1593 )))
1594
1595 (((
1596 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1597 )))
1598
1599 (((
1600 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1601 )))
1602
1603 (((
1604 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1605 )))
1606
1607 (((
1608 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1609 )))
1610
1611 (((
1612 AT+RX2FQ: Get or Set the Rx2 window frequency
1613 )))
1614
1615 (((
1616 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1617 )))
1618
1619 (((
1620 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1621 )))
1622
1623 (((
1624 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1625 )))
1626
1627 (((
1628 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1629 )))
1630
1631 (((
1632 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1633 )))
1634
1635 (((
1636 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1637 )))
1638
1639 (((
1640 AT+NWKID: Get or Set the Network ID
1641 )))
1642
1643 (((
1644 AT+FCU: Get or Set the Frame Counter Uplink
1645 )))
1646
1647 (((
1648 AT+FCD: Get or Set the Frame Counter Downlink
1649 )))
1650
1651 (((
1652 AT+CLASS: Get or Set the Device Class
1653 )))
1654
1655 (((
1656 AT+JOIN: Join network
1657 )))
1658
1659 (((
1660 AT+NJS: Get OTAA Join Status
1661 )))
1662
1663 (((
1664 AT+SENDB: Send hexadecimal data along with the application port
1665 )))
1666
1667 (((
1668 AT+SEND: Send text data along with the application port
1669 )))
1670
1671 (((
1672 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1673 )))
1674
1675 (((
1676 AT+RECV: Print last received data in raw format
1677 )))
1678
1679 (((
1680 AT+VER: Get current image version and Frequency Band
1681 )))
1682
1683 (((
1684 AT+CFM: Get or Set the confirmation mode (0-1)
1685 )))
1686
1687 (((
1688 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1689 )))
1690
1691 (((
1692 AT+SNR: Get the SNR of the last received packet
1693 )))
1694
1695 (((
1696 AT+RSSI: Get the RSSI of the last received packet
1697 )))
1698
1699 (((
1700 AT+TDC: Get or set the application data transmission interval in ms
1701 )))
1702
1703 (((
1704 AT+PORT: Get or set the application port
1705 )))
1706
1707 (((
1708 AT+DISAT: Disable AT commands
1709 )))
1710
1711 (((
1712 AT+PWORD: Set password, max 9 digits
1713 )))
1714
1715 (((
1716 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1717 )))
1718
1719 (((
1720 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1721 )))
1722
1723 (((
1724 AT+CFG: Print all settings
1725
1726
1727 )))
1728
1729
1730
1731 == 4.2 Common AT Command Sequence ==
1732
1733 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1734
1735 (((
1736
1737
1738 **If device has not joined network yet:**
1739 )))
1740
1741 (((
1742 (% style="background-color:#dcdcdc" %)123456
1743 )))
1744
1745 (((
1746 (% style="background-color:#dcdcdc" %)AT+FDR
1747 )))
1748
1749 (((
1750 (% style="background-color:#dcdcdc" %)123456
1751 )))
1752
1753 (((
1754 (% style="background-color:#dcdcdc" %)AT+NJM=0
1755 )))
1756
1757 (((
1758 (% style="background-color:#dcdcdc" %)ATZ
1759 )))
1760
1761
1762 (((
1763 **If device already joined network:**
1764 )))
1765
1766 (((
1767 (% style="background-color:#dcdcdc" %)AT+NJM=0
1768 )))
1769
1770 (((
1771 (% style="background-color:#dcdcdc" %)ATZ
1772
1773
1774 )))
1775
1776
1777
1778 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1779
1780 (((
1781
1782
1783 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1784 )))
1785
1786 (((
1787 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1788 )))
1789
1790 (((
1791 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1792 )))
1793
1794 (((
1795 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1796 )))
1797
1798 (((
1799 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1800 )))
1801
1802 (((
1803 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1804 )))
1805
1806 (((
1807 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1808 )))
1809
1810 (((
1811 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1812 )))
1813
1814 (((
1815 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1816 )))
1817
1818 (((
1819 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1820 )))
1821
1822 (((
1823 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1824 )))
1825
1826 (((
1827 (% 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.
1828 )))
1829
1830 (((
1831 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1832
1833
1834 )))
1835
1836 (((
1837 (% style="color:red" %)**Note:**
1838 )))
1839
1840 (((
1841 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1842 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1843 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.
1844 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
1845 )))
1846
1847 (((
1848 [[image:1653359097980-169.png||height="188" width="729"]]
1849 )))
1850
1851 (((
1852
1853 )))
1854
1855
1856 === 4.2.3 Change to Class A ===
1857
1858 If sensor JOINED
1859 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1860 ATZ
1861
1862
1863 = 5. FAQ =
1864
1865 == 5.1 How to upgrade the image? ==
1866
1867
1868 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1869
1870 * Support new features
1871 * For bug fix
1872 * Change LoRaWAN bands.
1873
1874 Below shows the hardware connection for how to upload an image to the LT:
1875
1876 [[image:1653359603330-121.png]]
1877
1878
1879 (((
1880 (% 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]].
1881 (% 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/]].
1882 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1883
1884
1885 (% style="color:blue" %)**For LT-22222-L**(%%):
1886 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.
1887 )))
1888
1889 [[image:image-20220524103407-12.png]]
1890
1891 [[image:image-20220524103429-13.png]]
1892
1893 [[image:image-20220524104033-15.png]]
1894
1895
1896 (% 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:
1897
1898 [[image:1653360054704-518.png||height="186" width="745"]]
1899
1900
1901 (((
1902 (((
1903
1904
1905 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1906 )))
1907 )))
1908
1909 (((
1910 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1911 )))
1912
1913 (((
1914
1915
1916 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1917 )))
1918
1919 (((
1920 (((
1921 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1922 )))
1923 )))
1924
1925 (((
1926 (((
1927 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1928
1929
1930 )))
1931 )))
1932
1933 (((
1934 (% 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.
1935 )))
1936
1937 (((
1938 [[image:1653360231087-571.png||height="401" width="727"]]
1939 )))
1940
1941 (((
1942 (% 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.
1943 )))
1944
1945
1946 (((
1947 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1948 )))
1949
1950 (((
1951 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1952 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1953 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1954 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1955 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1956 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1957 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1958 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1959 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1960 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1961 )))
1962
1963
1964 (((
1965 As shown in below:
1966 )))
1967
1968 [[image:1653360498588-932.png||height="485" width="726"]]
1969
1970
1971 == 5.4 Can I see counting event in Serial? ==
1972
1973 (((
1974 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.
1975
1976
1977 == 5.5 Can i use point to point communication for LT-22222-L? ==
1978
1979 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1980 )))
1981
1982 (((
1983
1984
1985 = 6. Trouble Shooting =
1986 )))
1987
1988 (((
1989 (((
1990 == 6.1 Downlink doesn’t work, how to solve it? ==
1991 )))
1992 )))
1993
1994 (((
1995 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1996 )))
1997
1998 (((
1999
2000
2001 == 6.2 Have trouble to upload image. ==
2002 )))
2003
2004 (((
2005 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2006 )))
2007
2008 (((
2009
2010
2011 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2012 )))
2013
2014 (((
2015 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2016 )))
2017
2018
2019
2020 = 7. Order Info =
2021
2022
2023 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2024
2025
2026 (% style="color:#4f81bd" %)**XXX:**
2027
2028 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2029 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2030 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2031 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2032 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2033 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2034 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2035 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2036 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2037
2038 = 8. Packing Info =
2039
2040
2041 **Package Includes**:
2042
2043 * LT-22222-L I/O Controller x 1
2044 * Stick Antenna for LoRa RF part x 1
2045 * Bracket for controller x1
2046 * Program cable x 1
2047
2048 **Dimension and weight**:
2049
2050 * Device Size: 13.5 x 7 x 3 cm
2051 * Device Weight: 105g
2052 * Package Size / pcs : 14.5 x 8 x 5 cm
2053 * Weight / pcs : 170g
2054
2055 = 9. Support =
2056
2057 * (((
2058 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.
2059 )))
2060 * (((
2061 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]]
2062 )))
2063
2064 = 10. Reference​​​​​ =
2065
2066 * 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]]
2067 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2068 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2069 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]