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Version 77.81 by Xiaoling on 2022/06/10 09:25
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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
492
493 **To use this mode, please run:**
494 )))
495
496 (% class="box infomessage" %)
497 (((
498 (((
499 **AT+MOD=4**
500 )))
501 )))
502
503 (% class="box infomessage" %)
504 (((
505 (((
506 **ATZ**
507 )))
508 )))
509
510 (((
511
512 )))
513
514 (((
515 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
516 )))
517
518 (((
519
520
521 **Plus below command for AVI1 Counting:**
522 )))
523
524 (% class="box infomessage" %)
525 (((
526 (((
527 **AT+SETCNT=3,60   (set AVI Count to 60)**
528 )))
529 )))
530
531 (% class="box infomessage" %)
532 (((
533 (((
534 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
535 )))
536 )))
537
538 (% class="box infomessage" %)
539 (((
540 (((
541 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
542 )))
543 )))
544
545 (% class="box infomessage" %)
546 (((
547 (((
548 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
549 )))
550 )))
551
552
553
554 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
555
556
557 **LT22222-L**: This mode the DI1 is used as a counting pin.
558
559 [[image:image-20220523182334-9.png]]
560
561 (((
562
563
564 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
565 )))
566
567 * RO is for relay. ROx=1 : close，ROx=0 always open.
568 * FIRST: Indicate this is the first packet after join network.
569 * (((
570 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
571 )))
572
573 (((
574 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
575 )))
576
577 (((
578
579
580 **To use this mode, please run:**
581 )))
582
583 (% class="box infomessage" %)
584 (((
585 (((
586 **AT+MOD=5**
587 )))
588 )))
589
590 (% class="box infomessage" %)
591 (((
592 (((
593 **ATZ**
594 )))
595 )))
596
597 (((
598 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
599 )))
600
601
602
603 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
604
605 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
606
607 For example, if user has configured below commands:
608
609 * **AT+MOD=1 ** **~-~->** The normal working mode
610 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
611
612
613 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
614
615 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
616 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.**
617
618
619 **AT Command to set Trigger Condition**:
620
621 (% style="color:#4f81bd" %)**Trigger base on voltage**:
622
623 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
624
625 **Example:**
626
627 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)
628
629 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
630
631
632 (% style="color:#4f81bd" %)**Trigger base on current**:
633
634 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
635
636 **Example:**
637
638 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
639
640
641 (% style="color:#4f81bd" %)**Trigger base on DI status**:
642
643 DI status trigger Flag.
644
645 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
646
647 **Example:**
648
649 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
650
651
652 **Downlink Command to set Trigger Condition**
653
654 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
655
656 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
657
658 AA: Code for this downlink Command:
659
660 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
661
662 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
663
664 yy2 yy2: AC1 or AV1 high limit.
665
666 yy3 yy3: AC2 or AV2 low limit.
667
668 Yy4 yy4: AC2 or AV2 high limit.
669
670
671 **Example1**: AA 00 13 88 00 00 00 00 00 00
672
673 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
674
675
676 **Example2**: AA 02 01 00
677
678 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
679
680
681 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
682
683 MOD6 Payload : total 11 bytes payload
684
685 [[image:image-20220524085923-1.png]]
686
687
688 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
689
690 [[image:image-20220524090106-2.png]]
691
692 * Each bits shows if the corresponding trigger has been configured.
693
694
695 **Example:**
696
697 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
698
699
700 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
701
702 [[image:image-20220524090249-3.png]]
703
704 * Each bits shows which status has been trigger on this uplink.
705
706
707 **Example:**
708
709 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
710
711
712 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
713
714 [[image:image-20220524090456-4.png]]
715
716 * Each bits shows which status has been trigger on this uplink.
717
718
719 **Example:**
720
721 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
722
723 00000101: Means both DI1 and DI2 trigger are enabled.
724
725
726 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
727
728 Downlink command to poll MOD6 status:
729
730 **AB 06**
731
732 When device got this command, it will send the MOD6 payload.
733
734
735
736 === 3.3.7 Payload Decoder ===
737
738 (((
739 **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/]]
740
741
742 )))
743
744
745
746 == 3.4 ​Configure LT via AT or Downlink ==
747
748 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
749
750 (((
751 There are two kinds of Commands:
752 )))
753
754 * (% 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]]
755
756 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
757
758
759
760 === 3.4.1 Common Commands ===
761
762 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]]
763
764
765
766 === 3.4.2 Sensor related commands ===
767
768 ==== 3.4.2.1 Set Transmit Interval ====
769
770 Set device uplink interval.
771
772 * AT Command:
773
774 (% class="box infomessage" %)
775 (((
776 **AT+TDC=N **
777 )))
778
779 **Example: **AT+TDC=30000. Means set interval to 30 seconds
780
781
782 * Downlink Payload (prefix 0x01):
783
784 (% class="box infomessage" %)
785 (((
786 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
787 )))
788
789
790
791 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
792
793 Set work mode.
794
795 * AT Command:
796
797 (% class="box infomessage" %)
798 (((
799 **AT+MOD=N  **
800 )))
801
802 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
803
804
805 * Downlink Payload (prefix 0x0A):
806
807 (% class="box infomessage" %)
808 (((
809 **0x0A aa     ~/~/ Same as AT+MOD=aa**
810 )))
811
812
813
814 ==== 3.4.2.3 Poll an uplink ====
815
816 * AT Command:
817
818 There is no AT Command to poll uplink
819
820
821 * Downlink Payload (prefix 0x08):
822
823 (% class="box infomessage" %)
824 (((
825 **0x08 FF     ~/~/ Poll an uplink,**
826 )))
827
828 **Example**: 0x08FF, ask device to send an Uplink
829
830
831
832 ==== 3.4.2.4 Enable Trigger Mode ====
833
834 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
835
836 * AT Command:
837
838 (% class="box infomessage" %)
839 (((
840 **AT+ADDMOD6=1 or 0**
841 )))
842
843 1: Enable Trigger Mode
844
845 0: Disable Trigger Mode
846
847
848 * Downlink Payload (prefix 0x0A 06):
849
850 (% class="box infomessage" %)
851 (((
852 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
853 )))
854
855
856
857 ==== 3.4.2.5 Poll trigger settings ====
858
859 Poll trigger settings,
860
861 * AT Command:
862
863 There is no AT Command for this feature.
864
865
866 * Downlink Payload (prefix 0x AB 06):
867
868 (% class="box infomessage" %)
869 (((
870 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
871 )))
872
873
874
875 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
876
877 Enable Disable DI1/DI2/DI2 as trigger,
878
879 * AT Command:
880
881 (% class="box infomessage" %)
882 (((
883 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
884 )))
885
886
887 **Example:**
888
889 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
890
891 * Downlink Payload (prefix 0xAA 02):
892
893 (% class="box infomessage" %)
894 (((
895 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
896 )))
897
898
899
900 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
901
902 Set DI1 or DI3(for LT-33222-L) trigger.
903
904 * AT Command:
905
906 (% class="box infomessage" %)
907 (((
908 **AT+TRIG1=a,b**
909 )))
910
911 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
912
913 b : delay timing.
914
915
916 **Example:**
917
918 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
919
920
921 * Downlink Payload (prefix 0x09 01 ):
922
923 (% class="box infomessage" %)
924 (((
925 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
926 )))
927
928
929
930 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
931
932 Set DI2 trigger.
933
934 * AT Command:
935
936 (% class="box infomessage" %)
937 (((
938 **AT+TRIG2=a,b**
939 )))
940
941 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
942
943 b : delay timing.
944
945
946 **Example:**
947
948 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
949
950
951 * Downlink Payload (prefix 0x09 02 ):
952
953 (% class="box infomessage" %)
954 (((
955 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
956 )))
957
958
959
960 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
961
962 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
963
964 * AT Command:
965
966 (% class="box infomessage" %)
967 (((
968 **AT+ACLIM. **
969 )))
970
971
972 * Downlink Payload (prefix 0xAA 01 ):
973
974 (% class="box infomessage" %)
975 (((
976 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
977 )))
978
979
980
981 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
982
983 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
984
985 * AT Command:
986
987 (% class="box infomessage" %)
988 (((
989 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
990 )))
991
992
993 * Downlink Payload (prefix 0xAA 00 ):
994
995 (% class="box infomessage" %)
996 (((
997 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
998 )))
999
1000
1001
1002 ==== 3.4.2.11 Trigger – Set minimum interval ====
1003
1004 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1005
1006 * AT Command:
1007
1008 (% class="box infomessage" %)
1009 (((
1010 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1011 )))
1012
1013
1014 * Downlink Payload (prefix 0xAC ):
1015
1016 (% class="box infomessage" %)
1017 (((
1018 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1019 )))
1020
1021
1022
1023 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1024
1025 * AT Command:
1026
1027 There is no AT Command to control Digital Output
1028
1029
1030 * Downlink Payload (prefix 0x02):
1031
1032 (% class="box infomessage" %)
1033 (((
1034 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1035 )))
1036
1037 (((
1038 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1039 )))
1040
1041 (((
1042 01: Low,  00: High ,  11: No action
1043 )))
1044
1045 [[image:image-20220524092754-5.png]]
1046
1047 (((
1048 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1049 )))
1050
1051 (((
1052 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1053 )))
1054
1055
1056
1057 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1058
1059 * AT Command:
1060
1061 There is no AT Command to control Digital Output
1062
1063
1064 * Downlink Payload (prefix 0xA9):
1065
1066 (% class="box infomessage" %)
1067 (((
1068 (((
1069 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1070 )))
1071 )))
1072
1073 This is to control the digital output time of DO pin. Include four bytes:
1074
1075 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1076
1077 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1078
1079 01: DO pins will change back to original state after timeout.
1080
1081 00: DO pins will change to an inverter state after timeout 
1082
1083
1084 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1085
1086 [[image:image-20220524093238-6.png]]
1087
1088
1089 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1090
1091 [[image:image-20220524093328-7.png]]
1092
1093
1094 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1095
1096 [[image:image-20220524093351-8.png]]
1097
1098
1099 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1100
1101 Latching time. Unit: ms
1102
1103 Device will upload a packet if downlink code executes successfully.
1104
1105
1106 **Example payload:**
1107
1108 **~1. A9 01 01 01 01 07 D0**
1109
1110 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1111
1112 **2. A9 01 00 01 11 07 D0**
1113
1114 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1115
1116 **3. A9 00 00 00 00 07 D0**
1117
1118 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1119
1120 **4. A9 00 11 01 00 07 D0**
1121
1122 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
1123
1124
1125
1126 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1127
1128 * AT Command:
1129
1130 There is no AT Command to control Relay Output
1131
1132
1133 * Downlink Payload (prefix 0x03):
1134
1135 (% class="box infomessage" %)
1136 (((
1137 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1138 )))
1139
1140 (((
1141 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1142 )))
1143
1144 (((
1145 01: Close ,  00: Open , 11: No action
1146 )))
1147
1148 (((
1149 [[image:image-20220524093724-9.png]]
1150 )))
1151
1152 Device will upload a packet if downlink code executes successfully.
1153
1154
1155
1156 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1157
1158 * AT Command:
1159
1160 There is no AT Command to control Relay Output
1161
1162
1163 * Downlink Payload (prefix 0x05):
1164
1165 (% class="box infomessage" %)
1166 (((
1167 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1168 )))
1169
1170 This is to control the relay output time of relay. Include four bytes:
1171
1172 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1173
1174 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1175
1176 01: Relays will change back to original state after timeout.
1177
1178 00: Relays will change to an inverter state after timeout
1179
1180
1181 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1182
1183 [[image:image-20220524093831-10.png]]
1184
1185
1186 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1187
1188 Device will upload a packet if downlink code executes successfully.
1189
1190
1191 **Example payload:**
1192
1193 **~1. 05 01 11 07 D0**
1194
1195 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1196
1197 **2. 05 01 10 07 D0**
1198
1199 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1200
1201 **3. 05 00 01 07 D0**
1202
1203 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1204
1205 **4. 05 00 00 07 D0**
1206
1207 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1208
1209
1210
1211 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1212
1213 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1214
1215 * AT Command:
1216
1217 (% class="box infomessage" %)
1218 (((
1219 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1220 )))
1221
1222
1223 * Downlink Payload (prefix 0xA5):
1224
1225 (% class="box infomessage" %)
1226 (((
1227 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1228 )))
1229
1230
1231
1232 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1233
1234 * AT Command:
1235
1236 (% class="box infomessage" %)
1237 (((
1238 **AT+SETCNT=aa,(bb cc dd ee) **
1239 )))
1240
1241 aa: 1: Set count1,
1242
1243 2: Set count2,
1244
1245 3: Set AV1 count
1246
1247 Bb cc dd ee: number to be set
1248
1249
1250 * Downlink Payload (prefix 0xA8):
1251
1252 (% class="box infomessage" %)
1253 (((
1254 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1255 )))
1256
1257
1258
1259 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1260
1261 Clear counting for counting mode
1262
1263 * AT Command:
1264
1265 (% class="box infomessage" %)
1266 (((
1267 **AT+CLRCOUNT ~/~/ clear all counting**
1268 )))
1269
1270 * Downlink Payload (prefix 0xA6):
1271
1272 (% class="box infomessage" %)
1273 (((
1274 **0x A6 01     ~/~/ clear all counting,**
1275 )))
1276
1277
1278
1279 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1280
1281 * AT Command:
1282
1283 (% class="box infomessage" %)
1284 (((
1285 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1286 )))
1287
1288 * Downlink Payload (prefix 0xA7):
1289
1290 (% class="box infomessage" %)
1291 (((
1292 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1293 )))
1294
1295 (((
1296 range: aa bb cc:0 to 16777215,  (unit:second)
1297
1298
1299 )))
1300
1301
1302 == 3.5 Integrate with Mydevice ==
1303
1304 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:
1305
1306 (((
1307 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1308 )))
1309
1310 (((
1311 (% 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:
1312 )))
1313
1314 [[image:1653356737703-362.png||height="232" width="732"]]
1315
1316 [[image:image-20220524094641-11.png||height="390" width="723"]]
1317
1318
1319 [[image:image-20220524094641-12.png||height="402" width="718"]]
1320
1321
1322 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1323
1324 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1325
1326 Search under The things network
1327
1328 [[image:1653356838789-523.png||height="337" width="740"]]
1329
1330
1331
1332 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1333
1334 [[image:image-20220524094909-1.png||height="335" width="729"]]
1335
1336
1337 [[image:image-20220524094909-2.png||height="337" width="729"]]
1338
1339
1340 [[image:image-20220524094909-3.png||height="338" width="727"]]
1341
1342
1343 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1344
1345
1346 [[image:image-20220524094909-5.png||height="341" width="734"]]
1347
1348
1349
1350 == 3.6 Interface Detail ==
1351
1352 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1353
1354 Support NPN Type sensor
1355
1356 [[image:1653356991268-289.png]]
1357
1358
1359
1360 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1361
1362 (((
1363 The DI port of LT-22222-L can support NPN or PNP output sensor.
1364 )))
1365
1366 (((
1367 (((
1368 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
1369 )))
1370 )))
1371
1372 [[image:1653357170703-587.png]]
1373
1374 (((
1375 (((
1376 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1377 )))
1378 )))
1379
1380 (((
1381
1382 )))
1383
1384 (((
1385 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1386 )))
1387
1388 (((
1389 This type of sensor will output a low signal GND when active.
1390 )))
1391
1392 * (((
1393 Connect sensor’s output to DI1-
1394 )))
1395 * (((
1396 Connect sensor’s VCC to DI1+.
1397 )))
1398
1399 (((
1400 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1401 )))
1402
1403 (((
1404 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1405 )))
1406
1407 (((
1408 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.
1409 )))
1410
1411 (((
1412
1413 )))
1414
1415 (((
1416 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1417 )))
1418
1419 (((
1420 This type of sensor will output a high signal (example 24v) when active.
1421 )))
1422
1423 * (((
1424 Connect sensor’s output to DI1+
1425 )))
1426 * (((
1427 Connect sensor’s GND DI1-.
1428 )))
1429
1430 (((
1431 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1432 )))
1433
1434 (((
1435 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1436 )))
1437
1438 (((
1439 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.
1440 )))
1441
1442 (((
1443
1444 )))
1445
1446 (((
1447 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1448 )))
1449
1450 (((
1451 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1452 )))
1453
1454 * (((
1455 Connect sensor’s output to DI1+ with a serial 50K resistor
1456 )))
1457 * (((
1458 Connect sensor’s GND DI1-.
1459 )))
1460
1461 (((
1462 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1463 )))
1464
1465 (((
1466 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1467 )))
1468
1469 (((
1470 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.
1471 )))
1472
1473
1474
1475 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1476
1477 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1478
1479 [[image:1653357531600-905.png]]
1480
1481
1482
1483 === 3.6.4 Analog Input Interface ===
1484
1485 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:
1486
1487
1488 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1489
1490 [[image:1653357592296-182.png]]
1491
1492 Example to connect a 4~~20mA sensor
1493
1494 We take the wind speed sensor as an example for reference only.
1495
1496
1497 **Specifications of the wind speed sensor:**
1498
1499 Red:  12~~24v
1500
1501 Yellow:  4~~20mA
1502
1503 Black:  GND
1504
1505
1506 **Connection diagram:**
1507
1508 [[image:1653357640609-758.png]]
1509
1510 [[image:1653357648330-671.png||height="155" width="733"]]
1511
1512
1513
1514 === 3.6.5 Relay Output ===
1515
1516 (((
1517 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:
1518 )))
1519
1520 [[image:image-20220524100215-9.png]]
1521
1522 [[image:image-20220524100215-10.png||height="382" width="723"]]
1523
1524
1525
1526 == 3.7 LEDs Indicators ==
1527
1528 [[image:image-20220524100748-11.png]]
1529
1530
1531 = 4. Use AT Command =
1532
1533 == 4.1 Access AT Command ==
1534
1535 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.
1536
1537 [[image:1653358238933-385.png]]
1538
1539
1540 (((
1541 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:
1542 )))
1543
1544 [[image:1653358355238-883.png]]
1545
1546
1547 (((
1548 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/]]
1549 )))
1550
1551 (((
1552 AT+<CMD>?        : Help on <CMD>
1553 )))
1554
1555 (((
1556 AT+<CMD>         : Run <CMD>
1557 )))
1558
1559 (((
1560 AT+<CMD>=<value> : Set the value
1561 )))
1562
1563 (((
1564 AT+<CMD>=?       : Get the value
1565 )))
1566
1567 (((
1568 ATZ: Trig a reset of the MCU
1569 )))
1570
1571 (((
1572 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1573 )))
1574
1575 (((
1576 AT+DEUI: Get or Set the Device EUI
1577 )))
1578
1579 (((
1580 AT+DADDR: Get or Set the Device Address
1581 )))
1582
1583 (((
1584 AT+APPKEY: Get or Set the Application Key
1585 )))
1586
1587 (((
1588 AT+NWKSKEY: Get or Set the Network Session Key
1589 )))
1590
1591 (((
1592 AT+APPSKEY: Get or Set the Application Session Key
1593 )))
1594
1595 (((
1596 AT+APPEUI: Get or Set the Application EUI
1597 )))
1598
1599 (((
1600 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1601 )))
1602
1603 (((
1604 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1605 )))
1606
1607 (((
1608 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1609 )))
1610
1611 (((
1612 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1613 )))
1614
1615 (((
1616 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1617 )))
1618
1619 (((
1620 AT+RX2FQ: Get or Set the Rx2 window frequency
1621 )))
1622
1623 (((
1624 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1625 )))
1626
1627 (((
1628 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1629 )))
1630
1631 (((
1632 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1633 )))
1634
1635 (((
1636 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1637 )))
1638
1639 (((
1640 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1641 )))
1642
1643 (((
1644 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1645 )))
1646
1647 (((
1648 AT+NWKID: Get or Set the Network ID
1649 )))
1650
1651 (((
1652 AT+FCU: Get or Set the Frame Counter Uplink
1653 )))
1654
1655 (((
1656 AT+FCD: Get or Set the Frame Counter Downlink
1657 )))
1658
1659 (((
1660 AT+CLASS: Get or Set the Device Class
1661 )))
1662
1663 (((
1664 AT+JOIN: Join network
1665 )))
1666
1667 (((
1668 AT+NJS: Get OTAA Join Status
1669 )))
1670
1671 (((
1672 AT+SENDB: Send hexadecimal data along with the application port
1673 )))
1674
1675 (((
1676 AT+SEND: Send text data along with the application port
1677 )))
1678
1679 (((
1680 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1681 )))
1682
1683 (((
1684 AT+RECV: Print last received data in raw format
1685 )))
1686
1687 (((
1688 AT+VER: Get current image version and Frequency Band
1689 )))
1690
1691 (((
1692 AT+CFM: Get or Set the confirmation mode (0-1)
1693 )))
1694
1695 (((
1696 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1697 )))
1698
1699 (((
1700 AT+SNR: Get the SNR of the last received packet
1701 )))
1702
1703 (((
1704 AT+RSSI: Get the RSSI of the last received packet
1705 )))
1706
1707 (((
1708 AT+TDC: Get or set the application data transmission interval in ms
1709 )))
1710
1711 (((
1712 AT+PORT: Get or set the application port
1713 )))
1714
1715 (((
1716 AT+DISAT: Disable AT commands
1717 )))
1718
1719 (((
1720 AT+PWORD: Set password, max 9 digits
1721 )))
1722
1723 (((
1724 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1725 )))
1726
1727 (((
1728 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1729 )))
1730
1731 (((
1732 AT+CFG: Print all settings
1733
1734
1735 )))
1736
1737
1738
1739 == 4.2 Common AT Command Sequence ==
1740
1741 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1742
1743 (((
1744
1745
1746 **If device has not joined network yet:**
1747 )))
1748
1749 (((
1750 (% style="background-color:#dcdcdc" %)123456
1751 )))
1752
1753 (((
1754 (% style="background-color:#dcdcdc" %)AT+FDR
1755 )))
1756
1757 (((
1758 (% style="background-color:#dcdcdc" %)123456
1759 )))
1760
1761 (((
1762 (% style="background-color:#dcdcdc" %)AT+NJM=0
1763 )))
1764
1765 (((
1766 (% style="background-color:#dcdcdc" %)ATZ
1767 )))
1768
1769
1770 (((
1771 **If device already joined network:**
1772 )))
1773
1774 (((
1775 (% style="background-color:#dcdcdc" %)AT+NJM=0
1776 )))
1777
1778 (((
1779 (% style="background-color:#dcdcdc" %)ATZ
1780
1781
1782 )))
1783
1784
1785
1786 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1787
1788 (((
1789
1790
1791 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1792 )))
1793
1794 (((
1795 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1796 )))
1797
1798 (((
1799 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1800 )))
1801
1802 (((
1803 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1804 )))
1805
1806 (((
1807 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1808 )))
1809
1810 (((
1811 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1812 )))
1813
1814 (((
1815 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1816 )))
1817
1818 (((
1819 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1820 )))
1821
1822 (((
1823 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1824 )))
1825
1826 (((
1827 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1828 )))
1829
1830 (((
1831 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1832 )))
1833
1834 (((
1835 (% 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.
1836 )))
1837
1838 (((
1839 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1840
1841
1842 )))
1843
1844 (((
1845 (% style="color:red" %)**Note:**
1846 )))
1847
1848 (((
1849 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1850 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1851 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.
1852 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
1853 )))
1854
1855 (((
1856 [[image:1653359097980-169.png||height="188" width="729"]]
1857 )))
1858
1859 (((
1860
1861 )))
1862
1863
1864 === 4.2.3 Change to Class A ===
1865
1866 If sensor JOINED
1867 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1868 ATZ
1869
1870
1871 = 5. FAQ =
1872
1873 == 5.1 How to upgrade the image? ==
1874
1875
1876 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1877
1878 * Support new features
1879 * For bug fix
1880 * Change LoRaWAN bands.
1881
1882 Below shows the hardware connection for how to upload an image to the LT:
1883
1884 [[image:1653359603330-121.png]]
1885
1886
1887 (((
1888 (% 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]].
1889 (% 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/]].
1890 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1891
1892
1893 (% style="color:blue" %)**For LT-22222-L**(%%):
1894 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.
1895 )))
1896
1897 [[image:image-20220524103407-12.png]]
1898
1899 [[image:image-20220524103429-13.png]]
1900
1901 [[image:image-20220524104033-15.png]]
1902
1903
1904 (% 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:
1905
1906 [[image:1653360054704-518.png||height="186" width="745"]]
1907
1908
1909 (((
1910 (((
1911
1912
1913 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1914 )))
1915 )))
1916
1917 (((
1918 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1919 )))
1920
1921 (((
1922
1923
1924 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1925 )))
1926
1927 (((
1928 (((
1929 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1930 )))
1931 )))
1932
1933 (((
1934 (((
1935 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1936
1937
1938 )))
1939 )))
1940
1941 (((
1942 (% 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.
1943 )))
1944
1945 (((
1946 [[image:1653360231087-571.png||height="401" width="727"]]
1947 )))
1948
1949 (((
1950 (% 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.
1951 )))
1952
1953
1954 (((
1955 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1956 )))
1957
1958 (((
1959 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1960 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1961 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1962 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1963 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1964 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1965 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1966 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1967 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1968 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1969 )))
1970
1971
1972 (((
1973 As shown in below:
1974 )))
1975
1976 [[image:1653360498588-932.png||height="485" width="726"]]
1977
1978
1979 == 5.4 Can I see counting event in Serial? ==
1980
1981 (((
1982 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.
1983
1984
1985 == 5.5 Can i use point to point communication for LT-22222-L? ==
1986
1987 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1988 )))
1989
1990 (((
1991
1992
1993 = 6. Trouble Shooting =
1994 )))
1995
1996 (((
1997 (((
1998 == 6.1 Downlink doesn’t work, how to solve it? ==
1999 )))
2000 )))
2001
2002 (((
2003 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2004 )))
2005
2006 (((
2007
2008
2009 == 6.2 Have trouble to upload image. ==
2010 )))
2011
2012 (((
2013 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2014 )))
2015
2016 (((
2017
2018
2019 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2020 )))
2021
2022 (((
2023 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2024 )))
2025
2026
2027
2028 = 7. Order Info =
2029
2030
2031 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2032
2033
2034 (% style="color:#4f81bd" %)**XXX:**
2035
2036 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2037 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2038 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2039 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2040 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2041 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2042 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2043 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2044 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2045
2046 = 8. Packing Info =
2047
2048
2049 **Package Includes**:
2050
2051 * LT-22222-L I/O Controller x 1
2052 * Stick Antenna for LoRa RF part x 1
2053 * Bracket for controller x1
2054 * Program cable x 1
2055
2056 **Dimension and weight**:
2057
2058 * Device Size: 13.5 x 7 x 3 cm
2059 * Device Weight: 105g
2060 * Package Size / pcs : 14.5 x 8 x 5 cm
2061 * Weight / pcs : 170g
2062
2063 = 9. Support =
2064
2065 * (((
2066 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.
2067 )))
2068 * (((
2069 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]]
2070 )))
2071
2072 = 10. Reference​​​​​ =
2073
2074 * 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]]
2075 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2076 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2077 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]