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Version 77.84 by Xiaoling on 2022/06/10 09:26
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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
354
355 **To use counting mode, please run:**
356 )))
357
358 (% class="box infomessage" %)
359 (((
360 (((
361 **AT+MOD=2**
362 )))
363 )))
364
365 (% class="box infomessage" %)
366 (((
367 (((
368 **ATZ**
369 )))
370 )))
371
372 (((
373
374
375 (% style="color:#4f81bd" %)**AT Commands for counting:**
376 )))
377
378 (((
379 **For LT22222-L:**
380 )))
381
382 (% class="box infomessage" %)
383 (((
384 (((
385 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
386 )))
387 )))
388
389 (% class="box infomessage" %)
390 (((
391 (((
392 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
393 )))
394 )))
395
396 (% class="box infomessage" %)
397 (((
398 (((
399 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
400 )))
401 )))
402
403 (% class="box infomessage" %)
404 (((
405 (((
406 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
407 )))
408 )))
409
410 (% class="box infomessage" %)
411 (((
412 (((
413 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
414 )))
415 )))
416
417 (% class="box infomessage" %)
418 (((
419 (((
420 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
421 )))
422 )))
423
424
425
426 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
427
428 **LT22222-L**: This mode the DI1 is used as a counting pin.
429
430 [[image:image-20220523181246-5.png]]
431
432 (((
433 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
434 )))
435
436 [[image:image-20220523181301-6.png]]
437
438 * RO is for relay. ROx=1 : close，ROx=0 always open.
439 * FIRST: Indicate this is the first packet after join network.
440 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
441
442 (((
443 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
444 )))
445
446 (((
447 **To use counting mode, please run:**
448 )))
449
450 (% class="box infomessage" %)
451 (((
452 (((
453 **AT+MOD=3**
454 )))
455 )))
456
457 (% class="box infomessage" %)
458 (((
459 (((
460 **ATZ**
461 )))
462 )))
463
464 (((
465 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
466
467
468 )))
469
470
471 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
472
473
474 **LT22222-L**: This mode the DI1 is used as a counting pin.
475
476 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.
477
478 [[image:image-20220523181903-8.png]]
479
480
481 (((
482 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
483 )))
484
485 [[image:image-20220523181727-7.png]]
486
487 * RO is for relay. ROx=1 : close，ROx=0 always open.
488 * FIRST: Indicate this is the first packet after join network.
489 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
490
491 (((
492 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
493 )))
494
495 (((
496
497
498 **To use this mode, please run:**
499 )))
500
501 (% class="box infomessage" %)
502 (((
503 (((
504 **AT+MOD=4**
505 )))
506 )))
507
508 (% class="box infomessage" %)
509 (((
510 (((
511 **ATZ**
512 )))
513 )))
514
515 (((
516
517 )))
518
519 (((
520 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
521 )))
522
523 (((
524
525
526 **Plus below command for AVI1 Counting:**
527 )))
528
529 (% class="box infomessage" %)
530 (((
531 (((
532 **AT+SETCNT=3,60   (set AVI Count to 60)**
533 )))
534 )))
535
536 (% class="box infomessage" %)
537 (((
538 (((
539 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
540 )))
541 )))
542
543 (% class="box infomessage" %)
544 (((
545 (((
546 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
547 )))
548 )))
549
550 (% class="box infomessage" %)
551 (((
552 (((
553 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
554 )))
555 )))
556
557
558
559 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
560
561
562 **LT22222-L**: This mode the DI1 is used as a counting pin.
563
564 [[image:image-20220523182334-9.png]]
565
566 (((
567
568
569 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
570 )))
571
572 * RO is for relay. ROx=1 : close，ROx=0 always open.
573 * FIRST: Indicate this is the first packet after join network.
574 * (((
575 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
576 )))
577
578 (((
579 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
580 )))
581
582 (((
583
584
585 **To use this mode, please run:**
586 )))
587
588 (% class="box infomessage" %)
589 (((
590 (((
591 **AT+MOD=5**
592 )))
593 )))
594
595 (% class="box infomessage" %)
596 (((
597 (((
598 **ATZ**
599 )))
600 )))
601
602 (((
603 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
604 )))
605
606
607
608 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
609
610
611 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
612
613 For example, if user has configured below commands:
614
615 * **AT+MOD=1 ** **~-~->** The normal working mode
616 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
617
618
619 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
620
621 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
622 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.**
623
624
625 **AT Command to set Trigger Condition**:
626
627 (% style="color:#4f81bd" %)**Trigger base on voltage**:
628
629 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
630
631 **Example:**
632
633 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)
634
635 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
636
637
638 (% style="color:#4f81bd" %)**Trigger base on current**:
639
640 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
641
642 **Example:**
643
644 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
645
646
647 (% style="color:#4f81bd" %)**Trigger base on DI status**:
648
649 DI status trigger Flag.
650
651 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
652
653 **Example:**
654
655 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
656
657
658 **Downlink Command to set Trigger Condition**
659
660 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
661
662 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
663
664 AA: Code for this downlink Command:
665
666 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
667
668 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
669
670 yy2 yy2: AC1 or AV1 high limit.
671
672 yy3 yy3: AC2 or AV2 low limit.
673
674 Yy4 yy4: AC2 or AV2 high limit.
675
676
677 **Example1**: AA 00 13 88 00 00 00 00 00 00
678
679 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
680
681
682 **Example2**: AA 02 01 00
683
684 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
685
686
687 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
688
689 MOD6 Payload : total 11 bytes payload
690
691 [[image:image-20220524085923-1.png]]
692
693
694 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
695
696 [[image:image-20220524090106-2.png]]
697
698 * Each bits shows if the corresponding trigger has been configured.
699
700
701 **Example:**
702
703 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
704
705
706 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
707
708 [[image:image-20220524090249-3.png]]
709
710 * Each bits shows which status has been trigger on this uplink.
711
712
713 **Example:**
714
715 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
716
717
718 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
719
720 [[image:image-20220524090456-4.png]]
721
722 * Each bits shows which status has been trigger on this uplink.
723
724
725 **Example:**
726
727 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
728
729 00000101: Means both DI1 and DI2 trigger are enabled.
730
731
732 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
733
734 Downlink command to poll MOD6 status:
735
736 **AB 06**
737
738 When device got this command, it will send the MOD6 payload.
739
740
741
742 === 3.3.7 Payload Decoder ===
743
744 (((
745
746
747 **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/]]
748
749
750 )))
751
752
753
754 == 3.4 ​Configure LT via AT or Downlink ==
755
756 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
757
758 (((
759 There are two kinds of Commands:
760 )))
761
762 * (% 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]]
763
764 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
765
766
767
768 === 3.4.1 Common Commands ===
769
770 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]]
771
772
773
774 === 3.4.2 Sensor related commands ===
775
776 ==== 3.4.2.1 Set Transmit Interval ====
777
778 Set device uplink interval.
779
780 * AT Command:
781
782 (% class="box infomessage" %)
783 (((
784 **AT+TDC=N **
785 )))
786
787 **Example: **AT+TDC=30000. Means set interval to 30 seconds
788
789
790 * Downlink Payload (prefix 0x01):
791
792 (% class="box infomessage" %)
793 (((
794 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
795 )))
796
797
798
799 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
800
801 Set work mode.
802
803 * AT Command:
804
805 (% class="box infomessage" %)
806 (((
807 **AT+MOD=N  **
808 )))
809
810 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
811
812
813 * Downlink Payload (prefix 0x0A):
814
815 (% class="box infomessage" %)
816 (((
817 **0x0A aa     ~/~/ Same as AT+MOD=aa**
818 )))
819
820
821
822 ==== 3.4.2.3 Poll an uplink ====
823
824 * AT Command:
825
826 There is no AT Command to poll uplink
827
828
829 * Downlink Payload (prefix 0x08):
830
831 (% class="box infomessage" %)
832 (((
833 **0x08 FF     ~/~/ Poll an uplink,**
834 )))
835
836 **Example**: 0x08FF, ask device to send an Uplink
837
838
839
840 ==== 3.4.2.4 Enable Trigger Mode ====
841
842 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
843
844 * AT Command:
845
846 (% class="box infomessage" %)
847 (((
848 **AT+ADDMOD6=1 or 0**
849 )))
850
851 1: Enable Trigger Mode
852
853 0: Disable Trigger Mode
854
855
856 * Downlink Payload (prefix 0x0A 06):
857
858 (% class="box infomessage" %)
859 (((
860 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
861 )))
862
863
864
865 ==== 3.4.2.5 Poll trigger settings ====
866
867 Poll trigger settings,
868
869 * AT Command:
870
871 There is no AT Command for this feature.
872
873
874 * Downlink Payload (prefix 0x AB 06):
875
876 (% class="box infomessage" %)
877 (((
878 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
879 )))
880
881
882
883 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
884
885 Enable Disable DI1/DI2/DI2 as trigger,
886
887 * AT Command:
888
889 (% class="box infomessage" %)
890 (((
891 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
892 )))
893
894
895 **Example:**
896
897 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
898
899 * Downlink Payload (prefix 0xAA 02):
900
901 (% class="box infomessage" %)
902 (((
903 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
904 )))
905
906
907
908 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
909
910 Set DI1 or DI3(for LT-33222-L) trigger.
911
912 * AT Command:
913
914 (% class="box infomessage" %)
915 (((
916 **AT+TRIG1=a,b**
917 )))
918
919 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
920
921 b : delay timing.
922
923
924 **Example:**
925
926 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
927
928
929 * Downlink Payload (prefix 0x09 01 ):
930
931 (% class="box infomessage" %)
932 (((
933 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
934 )))
935
936
937
938 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
939
940 Set DI2 trigger.
941
942 * AT Command:
943
944 (% class="box infomessage" %)
945 (((
946 **AT+TRIG2=a,b**
947 )))
948
949 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
950
951 b : delay timing.
952
953
954 **Example:**
955
956 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
957
958
959 * Downlink Payload (prefix 0x09 02 ):
960
961 (% class="box infomessage" %)
962 (((
963 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
964 )))
965
966
967
968 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
969
970 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
971
972 * AT Command:
973
974 (% class="box infomessage" %)
975 (((
976 **AT+ACLIM. **
977 )))
978
979
980 * Downlink Payload (prefix 0xAA 01 ):
981
982 (% class="box infomessage" %)
983 (((
984 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
985 )))
986
987
988
989 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
990
991 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
992
993 * AT Command:
994
995 (% class="box infomessage" %)
996 (((
997 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
998 )))
999
1000
1001 * Downlink Payload (prefix 0xAA 00 ):
1002
1003 (% class="box infomessage" %)
1004 (((
1005 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1006 )))
1007
1008
1009
1010 ==== 3.4.2.11 Trigger – Set minimum interval ====
1011
1012 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1013
1014 * AT Command:
1015
1016 (% class="box infomessage" %)
1017 (((
1018 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1019 )))
1020
1021
1022 * Downlink Payload (prefix 0xAC ):
1023
1024 (% class="box infomessage" %)
1025 (((
1026 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1027 )))
1028
1029
1030
1031 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1032
1033 * AT Command:
1034
1035 There is no AT Command to control Digital Output
1036
1037
1038 * Downlink Payload (prefix 0x02):
1039
1040 (% class="box infomessage" %)
1041 (((
1042 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1043 )))
1044
1045 (((
1046 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1047 )))
1048
1049 (((
1050 01: Low,  00: High ,  11: No action
1051 )))
1052
1053 [[image:image-20220524092754-5.png]]
1054
1055 (((
1056 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1057 )))
1058
1059 (((
1060 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1061 )))
1062
1063
1064
1065 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1066
1067 * AT Command:
1068
1069 There is no AT Command to control Digital Output
1070
1071
1072 * Downlink Payload (prefix 0xA9):
1073
1074 (% class="box infomessage" %)
1075 (((
1076 (((
1077 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1078 )))
1079 )))
1080
1081 This is to control the digital output time of DO pin. Include four bytes:
1082
1083 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1084
1085 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1086
1087 01: DO pins will change back to original state after timeout.
1088
1089 00: DO pins will change to an inverter state after timeout 
1090
1091
1092 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1093
1094 [[image:image-20220524093238-6.png]]
1095
1096
1097 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1098
1099 [[image:image-20220524093328-7.png]]
1100
1101
1102 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1103
1104 [[image:image-20220524093351-8.png]]
1105
1106
1107 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1108
1109 Latching time. Unit: ms
1110
1111 Device will upload a packet if downlink code executes successfully.
1112
1113
1114 **Example payload:**
1115
1116 **~1. A9 01 01 01 01 07 D0**
1117
1118 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1119
1120 **2. A9 01 00 01 11 07 D0**
1121
1122 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1123
1124 **3. A9 00 00 00 00 07 D0**
1125
1126 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1127
1128 **4. A9 00 11 01 00 07 D0**
1129
1130 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
1131
1132
1133
1134 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1135
1136 * AT Command:
1137
1138 There is no AT Command to control Relay Output
1139
1140
1141 * Downlink Payload (prefix 0x03):
1142
1143 (% class="box infomessage" %)
1144 (((
1145 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1146 )))
1147
1148 (((
1149 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1150 )))
1151
1152 (((
1153 01: Close ,  00: Open , 11: No action
1154 )))
1155
1156 (((
1157 [[image:image-20220524093724-9.png]]
1158 )))
1159
1160 Device will upload a packet if downlink code executes successfully.
1161
1162
1163
1164 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1165
1166 * AT Command:
1167
1168 There is no AT Command to control Relay Output
1169
1170
1171 * Downlink Payload (prefix 0x05):
1172
1173 (% class="box infomessage" %)
1174 (((
1175 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1176 )))
1177
1178 This is to control the relay output time of relay. Include four bytes:
1179
1180 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1181
1182 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1183
1184 01: Relays will change back to original state after timeout.
1185
1186 00: Relays will change to an inverter state after timeout
1187
1188
1189 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1190
1191 [[image:image-20220524093831-10.png]]
1192
1193
1194 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1195
1196 Device will upload a packet if downlink code executes successfully.
1197
1198
1199 **Example payload:**
1200
1201 **~1. 05 01 11 07 D0**
1202
1203 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1204
1205 **2. 05 01 10 07 D0**
1206
1207 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1208
1209 **3. 05 00 01 07 D0**
1210
1211 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1212
1213 **4. 05 00 00 07 D0**
1214
1215 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1216
1217
1218
1219 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1220
1221 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1222
1223 * AT Command:
1224
1225 (% class="box infomessage" %)
1226 (((
1227 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1228 )))
1229
1230
1231 * Downlink Payload (prefix 0xA5):
1232
1233 (% class="box infomessage" %)
1234 (((
1235 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1236 )))
1237
1238
1239
1240 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1241
1242 * AT Command:
1243
1244 (% class="box infomessage" %)
1245 (((
1246 **AT+SETCNT=aa,(bb cc dd ee) **
1247 )))
1248
1249 aa: 1: Set count1,
1250
1251 2: Set count2,
1252
1253 3: Set AV1 count
1254
1255 Bb cc dd ee: number to be set
1256
1257
1258 * Downlink Payload (prefix 0xA8):
1259
1260 (% class="box infomessage" %)
1261 (((
1262 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1263 )))
1264
1265
1266
1267 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1268
1269 Clear counting for counting mode
1270
1271 * AT Command:
1272
1273 (% class="box infomessage" %)
1274 (((
1275 **AT+CLRCOUNT ~/~/ clear all counting**
1276 )))
1277
1278 * Downlink Payload (prefix 0xA6):
1279
1280 (% class="box infomessage" %)
1281 (((
1282 **0x A6 01     ~/~/ clear all counting,**
1283 )))
1284
1285
1286
1287 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1288
1289 * AT Command:
1290
1291 (% class="box infomessage" %)
1292 (((
1293 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1294 )))
1295
1296 * Downlink Payload (prefix 0xA7):
1297
1298 (% class="box infomessage" %)
1299 (((
1300 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1301 )))
1302
1303 (((
1304 range: aa bb cc:0 to 16777215,  (unit:second)
1305
1306
1307 )))
1308
1309
1310 == 3.5 Integrate with Mydevice ==
1311
1312 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:
1313
1314 (((
1315 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1316 )))
1317
1318 (((
1319 (% 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:
1320 )))
1321
1322 [[image:1653356737703-362.png||height="232" width="732"]]
1323
1324 [[image:image-20220524094641-11.png||height="390" width="723"]]
1325
1326
1327 [[image:image-20220524094641-12.png||height="402" width="718"]]
1328
1329
1330 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1331
1332 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1333
1334 Search under The things network
1335
1336 [[image:1653356838789-523.png||height="337" width="740"]]
1337
1338
1339
1340 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1341
1342 [[image:image-20220524094909-1.png||height="335" width="729"]]
1343
1344
1345 [[image:image-20220524094909-2.png||height="337" width="729"]]
1346
1347
1348 [[image:image-20220524094909-3.png||height="338" width="727"]]
1349
1350
1351 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1352
1353
1354 [[image:image-20220524094909-5.png||height="341" width="734"]]
1355
1356
1357
1358 == 3.6 Interface Detail ==
1359
1360 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1361
1362 Support NPN Type sensor
1363
1364 [[image:1653356991268-289.png]]
1365
1366
1367
1368 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1369
1370 (((
1371 The DI port of LT-22222-L can support NPN or PNP output sensor.
1372 )))
1373
1374 (((
1375 (((
1376 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
1377 )))
1378 )))
1379
1380 [[image:1653357170703-587.png]]
1381
1382 (((
1383 (((
1384 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1385 )))
1386 )))
1387
1388 (((
1389
1390 )))
1391
1392 (((
1393 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1394 )))
1395
1396 (((
1397 This type of sensor will output a low signal GND when active.
1398 )))
1399
1400 * (((
1401 Connect sensor’s output to DI1-
1402 )))
1403 * (((
1404 Connect sensor’s VCC to DI1+.
1405 )))
1406
1407 (((
1408 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1409 )))
1410
1411 (((
1412 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1413 )))
1414
1415 (((
1416 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.
1417 )))
1418
1419 (((
1420
1421 )))
1422
1423 (((
1424 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1425 )))
1426
1427 (((
1428 This type of sensor will output a high signal (example 24v) when active.
1429 )))
1430
1431 * (((
1432 Connect sensor’s output to DI1+
1433 )))
1434 * (((
1435 Connect sensor’s GND DI1-.
1436 )))
1437
1438 (((
1439 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1440 )))
1441
1442 (((
1443 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1444 )))
1445
1446 (((
1447 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.
1448 )))
1449
1450 (((
1451
1452 )))
1453
1454 (((
1455 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1456 )))
1457
1458 (((
1459 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1460 )))
1461
1462 * (((
1463 Connect sensor’s output to DI1+ with a serial 50K resistor
1464 )))
1465 * (((
1466 Connect sensor’s GND DI1-.
1467 )))
1468
1469 (((
1470 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1471 )))
1472
1473 (((
1474 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1475 )))
1476
1477 (((
1478 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.
1479 )))
1480
1481
1482
1483 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1484
1485 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1486
1487 [[image:1653357531600-905.png]]
1488
1489
1490
1491 === 3.6.4 Analog Input Interface ===
1492
1493 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:
1494
1495
1496 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1497
1498 [[image:1653357592296-182.png]]
1499
1500 Example to connect a 4~~20mA sensor
1501
1502 We take the wind speed sensor as an example for reference only.
1503
1504
1505 **Specifications of the wind speed sensor:**
1506
1507 Red:  12~~24v
1508
1509 Yellow:  4~~20mA
1510
1511 Black:  GND
1512
1513
1514 **Connection diagram:**
1515
1516 [[image:1653357640609-758.png]]
1517
1518 [[image:1653357648330-671.png||height="155" width="733"]]
1519
1520
1521
1522 === 3.6.5 Relay Output ===
1523
1524 (((
1525 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:
1526 )))
1527
1528 [[image:image-20220524100215-9.png]]
1529
1530 [[image:image-20220524100215-10.png||height="382" width="723"]]
1531
1532
1533
1534 == 3.7 LEDs Indicators ==
1535
1536 [[image:image-20220524100748-11.png]]
1537
1538
1539 = 4. Use AT Command =
1540
1541 == 4.1 Access AT Command ==
1542
1543 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.
1544
1545 [[image:1653358238933-385.png]]
1546
1547
1548 (((
1549 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:
1550 )))
1551
1552 [[image:1653358355238-883.png]]
1553
1554
1555 (((
1556 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/]]
1557 )))
1558
1559 (((
1560 AT+<CMD>?        : Help on <CMD>
1561 )))
1562
1563 (((
1564 AT+<CMD>         : Run <CMD>
1565 )))
1566
1567 (((
1568 AT+<CMD>=<value> : Set the value
1569 )))
1570
1571 (((
1572 AT+<CMD>=?       : Get the value
1573 )))
1574
1575 (((
1576 ATZ: Trig a reset of the MCU
1577 )))
1578
1579 (((
1580 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1581 )))
1582
1583 (((
1584 AT+DEUI: Get or Set the Device EUI
1585 )))
1586
1587 (((
1588 AT+DADDR: Get or Set the Device Address
1589 )))
1590
1591 (((
1592 AT+APPKEY: Get or Set the Application Key
1593 )))
1594
1595 (((
1596 AT+NWKSKEY: Get or Set the Network Session Key
1597 )))
1598
1599 (((
1600 AT+APPSKEY: Get or Set the Application Session Key
1601 )))
1602
1603 (((
1604 AT+APPEUI: Get or Set the Application EUI
1605 )))
1606
1607 (((
1608 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1609 )))
1610
1611 (((
1612 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1613 )))
1614
1615 (((
1616 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1617 )))
1618
1619 (((
1620 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1621 )))
1622
1623 (((
1624 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1625 )))
1626
1627 (((
1628 AT+RX2FQ: Get or Set the Rx2 window frequency
1629 )))
1630
1631 (((
1632 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1633 )))
1634
1635 (((
1636 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1637 )))
1638
1639 (((
1640 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1641 )))
1642
1643 (((
1644 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1645 )))
1646
1647 (((
1648 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1649 )))
1650
1651 (((
1652 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1653 )))
1654
1655 (((
1656 AT+NWKID: Get or Set the Network ID
1657 )))
1658
1659 (((
1660 AT+FCU: Get or Set the Frame Counter Uplink
1661 )))
1662
1663 (((
1664 AT+FCD: Get or Set the Frame Counter Downlink
1665 )))
1666
1667 (((
1668 AT+CLASS: Get or Set the Device Class
1669 )))
1670
1671 (((
1672 AT+JOIN: Join network
1673 )))
1674
1675 (((
1676 AT+NJS: Get OTAA Join Status
1677 )))
1678
1679 (((
1680 AT+SENDB: Send hexadecimal data along with the application port
1681 )))
1682
1683 (((
1684 AT+SEND: Send text data along with the application port
1685 )))
1686
1687 (((
1688 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1689 )))
1690
1691 (((
1692 AT+RECV: Print last received data in raw format
1693 )))
1694
1695 (((
1696 AT+VER: Get current image version and Frequency Band
1697 )))
1698
1699 (((
1700 AT+CFM: Get or Set the confirmation mode (0-1)
1701 )))
1702
1703 (((
1704 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1705 )))
1706
1707 (((
1708 AT+SNR: Get the SNR of the last received packet
1709 )))
1710
1711 (((
1712 AT+RSSI: Get the RSSI of the last received packet
1713 )))
1714
1715 (((
1716 AT+TDC: Get or set the application data transmission interval in ms
1717 )))
1718
1719 (((
1720 AT+PORT: Get or set the application port
1721 )))
1722
1723 (((
1724 AT+DISAT: Disable AT commands
1725 )))
1726
1727 (((
1728 AT+PWORD: Set password, max 9 digits
1729 )))
1730
1731 (((
1732 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1733 )))
1734
1735 (((
1736 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1737 )))
1738
1739 (((
1740 AT+CFG: Print all settings
1741
1742
1743 )))
1744
1745
1746
1747 == 4.2 Common AT Command Sequence ==
1748
1749 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1750
1751 (((
1752
1753
1754 **If device has not joined network yet:**
1755 )))
1756
1757 (((
1758 (% style="background-color:#dcdcdc" %)123456
1759 )))
1760
1761 (((
1762 (% style="background-color:#dcdcdc" %)AT+FDR
1763 )))
1764
1765 (((
1766 (% style="background-color:#dcdcdc" %)123456
1767 )))
1768
1769 (((
1770 (% style="background-color:#dcdcdc" %)AT+NJM=0
1771 )))
1772
1773 (((
1774 (% style="background-color:#dcdcdc" %)ATZ
1775 )))
1776
1777
1778 (((
1779 **If device already joined network:**
1780 )))
1781
1782 (((
1783 (% style="background-color:#dcdcdc" %)AT+NJM=0
1784 )))
1785
1786 (((
1787 (% style="background-color:#dcdcdc" %)ATZ
1788
1789
1790 )))
1791
1792
1793
1794 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1795
1796 (((
1797
1798
1799 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1800 )))
1801
1802 (((
1803 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1804 )))
1805
1806 (((
1807 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1808 )))
1809
1810 (((
1811 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1812 )))
1813
1814 (((
1815 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1816 )))
1817
1818 (((
1819 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1820 )))
1821
1822 (((
1823 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1824 )))
1825
1826 (((
1827 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1828 )))
1829
1830 (((
1831 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1832 )))
1833
1834 (((
1835 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1836 )))
1837
1838 (((
1839 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1840 )))
1841
1842 (((
1843 (% 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.
1844 )))
1845
1846 (((
1847 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1848
1849
1850 )))
1851
1852 (((
1853 (% style="color:red" %)**Note:**
1854 )))
1855
1856 (((
1857 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1858 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1859 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.
1860 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
1861 )))
1862
1863 (((
1864 [[image:1653359097980-169.png||height="188" width="729"]]
1865 )))
1866
1867 (((
1868
1869 )))
1870
1871
1872 === 4.2.3 Change to Class A ===
1873
1874 If sensor JOINED
1875 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1876 ATZ
1877
1878
1879 = 5. FAQ =
1880
1881 == 5.1 How to upgrade the image? ==
1882
1883
1884 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1885
1886 * Support new features
1887 * For bug fix
1888 * Change LoRaWAN bands.
1889
1890 Below shows the hardware connection for how to upload an image to the LT:
1891
1892 [[image:1653359603330-121.png]]
1893
1894
1895 (((
1896 (% 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]].
1897 (% 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/]].
1898 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1899
1900
1901 (% style="color:blue" %)**For LT-22222-L**(%%):
1902 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.
1903 )))
1904
1905 [[image:image-20220524103407-12.png]]
1906
1907 [[image:image-20220524103429-13.png]]
1908
1909 [[image:image-20220524104033-15.png]]
1910
1911
1912 (% 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:
1913
1914 [[image:1653360054704-518.png||height="186" width="745"]]
1915
1916
1917 (((
1918 (((
1919
1920
1921 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1922 )))
1923 )))
1924
1925 (((
1926 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1927 )))
1928
1929 (((
1930
1931
1932 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1933 )))
1934
1935 (((
1936 (((
1937 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1938 )))
1939 )))
1940
1941 (((
1942 (((
1943 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1944
1945
1946 )))
1947 )))
1948
1949 (((
1950 (% 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.
1951 )))
1952
1953 (((
1954 [[image:1653360231087-571.png||height="401" width="727"]]
1955 )))
1956
1957 (((
1958 (% 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.
1959 )))
1960
1961
1962 (((
1963 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1964 )))
1965
1966 (((
1967 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1968 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1969 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1970 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1971 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1972 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1973 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1974 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1975 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1976 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1977 )))
1978
1979
1980 (((
1981 As shown in below:
1982 )))
1983
1984 [[image:1653360498588-932.png||height="485" width="726"]]
1985
1986
1987 == 5.4 Can I see counting event in Serial? ==
1988
1989 (((
1990 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.
1991
1992
1993 == 5.5 Can i use point to point communication for LT-22222-L? ==
1994
1995 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1996 )))
1997
1998 (((
1999
2000
2001 = 6. Trouble Shooting =
2002 )))
2003
2004 (((
2005 (((
2006 == 6.1 Downlink doesn’t work, how to solve it? ==
2007 )))
2008 )))
2009
2010 (((
2011 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2012 )))
2013
2014 (((
2015
2016
2017 == 6.2 Have trouble to upload image. ==
2018 )))
2019
2020 (((
2021 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2022 )))
2023
2024 (((
2025
2026
2027 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2028 )))
2029
2030 (((
2031 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2032 )))
2033
2034
2035
2036 = 7. Order Info =
2037
2038
2039 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2040
2041
2042 (% style="color:#4f81bd" %)**XXX:**
2043
2044 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2045 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2046 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2047 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2048 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2049 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2050 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2051 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2052 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2053
2054 = 8. Packing Info =
2055
2056
2057 **Package Includes**:
2058
2059 * LT-22222-L I/O Controller x 1
2060 * Stick Antenna for LoRa RF part x 1
2061 * Bracket for controller x1
2062 * Program cable x 1
2063
2064 **Dimension and weight**:
2065
2066 * Device Size: 13.5 x 7 x 3 cm
2067 * Device Weight: 105g
2068 * Package Size / pcs : 14.5 x 8 x 5 cm
2069 * Weight / pcs : 170g
2070
2071 = 9. Support =
2072
2073 * (((
2074 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.
2075 )))
2076 * (((
2077 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]]
2078 )))
2079
2080 = 10. Reference​​​​​ =
2081
2082 * 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]]
2083 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2084 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2085 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]