Version 77.98 by Xiaoling on 2022/06/10 09:32
Show last authors
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
279 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
280
281 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
282
283 [[image:image-20220523174024-3.png]]
284
285 (((
286
287
288 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
289 )))
290
291 [[image:image-20220523174254-4.png]]
292
293 * RO is for relay. ROx=1 : close，ROx=0 always open.
294 * DI is for digital input. DIx=1: high or float, DIx=0: low.
295 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
296
297 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
298
299 For example if payload is: [[image:image-20220523175847-2.png]]
300
301
302 **The value for the interface is:  **
303
304 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
305
306 AVI2 channel voltage is 0x04AC/1000=1.196V
307
308 ACI1 channel current is 0x1310/1000=4.880mA
309
310 ACI2 channel current is 0x1300/1000=4.864mA
311
312 The last byte 0xAA= 10101010(B) means
313
314 * [1] RO1 relay channel is close and the RO1 LED is ON.
315 * [0] RO2 relay channel is open and RO2 LED is OFF;
316
317
318
319 **LT22222-L:**
320
321 * [1] DI2 channel is high input and DI2 LED is ON;
322 * [0] DI1 channel is low input;
323
324 * [0] DO3 channel output state
325 ** DO3 is float in case no load between DO3 and V+.;
326 ** DO3 is high in case there is load between DO3 and V+.
327 ** DO3 LED is off in both case
328 * [1] DO2 channel output is low and DO2 LED is ON.
329 * [0] DO1 channel output state
330 ** DO1 is float in case no load between DO1 and V+.;
331 ** DO1 is high in case there is load between DO1 and V+.
332 ** DO1 LED is off in both case
333
334
335
336 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
337
338
339 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
340
341 (((
342 Total : 11 bytes payload
343 )))
344
345 [[image:image-20220523180452-3.png]]
346
347
348 (((
349 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
350 )))
351
352 [[image:image-20220523180506-4.png]]
353
354 * RO is for relay. ROx=1 : close，ROx=0 always open.
355 * FIRST: Indicate this is the first packet after join network.
356 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
357
358 (((
359 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
360 )))
361
362 (((
363
364
365 **To use counting mode, please run:**
366 )))
367
368 (% class="box infomessage" %)
369 (((
370 (((
371 **AT+MOD=2**
372 )))
373 )))
374
375 (% class="box infomessage" %)
376 (((
377 (((
378 **ATZ**
379 )))
380 )))
381
382 (((
383
384
385 (% style="color:#4f81bd" %)**AT Commands for counting:**
386 )))
387
388 (((
389 **For LT22222-L:**
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
396 )))
397 )))
398
399 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
403 )))
404 )))
405
406 (% class="box infomessage" %)
407 (((
408 (((
409 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
410 )))
411 )))
412
413 (% class="box infomessage" %)
414 (((
415 (((
416 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
417 )))
418 )))
419
420 (% class="box infomessage" %)
421 (((
422 (((
423 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
424 )))
425 )))
426
427 (% class="box infomessage" %)
428 (((
429 (((
430 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
431 )))
432 )))
433
434
435
436 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
437
438 **LT22222-L**: This mode the DI1 is used as a counting pin.
439
440 [[image:image-20220523181246-5.png]]
441
442 (((
443 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
444 )))
445
446 [[image:image-20220523181301-6.png]]
447
448 * RO is for relay. ROx=1 : close，ROx=0 always open.
449 * FIRST: Indicate this is the first packet after join network.
450 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
451
452 (((
453 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
454 )))
455
456 (((
457 **To use counting mode, please run:**
458 )))
459
460 (% class="box infomessage" %)
461 (((
462 (((
463 **AT+MOD=3**
464 )))
465 )))
466
467 (% class="box infomessage" %)
468 (((
469 (((
470 **ATZ**
471 )))
472 )))
473
474 (((
475 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
476
477
478 )))
479
480
481 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
482
483
484 **LT22222-L**: This mode the DI1 is used as a counting pin.
485
486 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.
487
488 [[image:image-20220523181903-8.png]]
489
490
491 (((
492 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
493 )))
494
495 [[image:image-20220523181727-7.png]]
496
497 * RO is for relay. ROx=1 : close，ROx=0 always open.
498 * FIRST: Indicate this is the first packet after join network.
499 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
500
501 (((
502 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
503 )))
504
505 (((
506
507
508 **To use this mode, please run:**
509 )))
510
511 (% class="box infomessage" %)
512 (((
513 (((
514 **AT+MOD=4**
515 )))
516 )))
517
518 (% class="box infomessage" %)
519 (((
520 (((
521 **ATZ**
522 )))
523 )))
524
525 (((
526
527 )))
528
529 (((
530 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
531 )))
532
533 (((
534
535
536 **Plus below command for AVI1 Counting:**
537 )))
538
539 (% class="box infomessage" %)
540 (((
541 (((
542 **AT+SETCNT=3,60   (set AVI Count to 60)**
543 )))
544 )))
545
546 (% class="box infomessage" %)
547 (((
548 (((
549 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
550 )))
551 )))
552
553 (% class="box infomessage" %)
554 (((
555 (((
556 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
557 )))
558 )))
559
560 (% class="box infomessage" %)
561 (((
562 (((
563 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
564 )))
565 )))
566
567
568
569 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
570
571
572 **LT22222-L**: This mode the DI1 is used as a counting pin.
573
574 [[image:image-20220523182334-9.png]]
575
576 (((
577
578
579 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
580 )))
581
582 * RO is for relay. ROx=1 : close，ROx=0 always open.
583 * FIRST: Indicate this is the first packet after join network.
584 * (((
585 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
586 )))
587
588 (((
589 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
590 )))
591
592 (((
593
594
595 **To use this mode, please run:**
596 )))
597
598 (% class="box infomessage" %)
599 (((
600 (((
601 **AT+MOD=5**
602 )))
603 )))
604
605 (% class="box infomessage" %)
606 (((
607 (((
608 **ATZ**
609 )))
610 )))
611
612 (((
613 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
614 )))
615
616
617
618 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
619
620
621 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
622
623 For example, if user has configured below commands:
624
625 * **AT+MOD=1 ** **~-~->** The normal working mode
626 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
627
628
629 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
630
631 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
632 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.**
633
634
635
636 **AT Command to set Trigger Condition**:
637
638 (% style="color:#4f81bd" %)**Trigger base on voltage**:
639
640 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
641
642 **Example:**
643
644 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)
645
646 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
647
648
649
650 (% style="color:#4f81bd" %)**Trigger base on current**:
651
652 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
653
654 **Example:**
655
656 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
657
658
659
660 (% style="color:#4f81bd" %)**Trigger base on DI status**:
661
662 DI status trigger Flag.
663
664 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
665
666
667 **Example:**
668
669 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
670
671
672 **Downlink Command to set Trigger Condition:**
673
674 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
675
676 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
677
678 AA: Code for this downlink Command:
679
680 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
681
682 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
683
684 yy2 yy2: AC1 or AV1 high limit.
685
686 yy3 yy3: AC2 or AV2 low limit.
687
688 Yy4 yy4: AC2 or AV2 high limit.
689
690
691 **Example1**: AA 00 13 88 00 00 00 00 00 00
692
693 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
694
695
696 **Example2**: AA 02 01 00
697
698 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
699
700
701
702 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
703
704 MOD6 Payload : total 11 bytes payload
705
706 [[image:image-20220524085923-1.png]]
707
708
709 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
710
711 [[image:image-20220524090106-2.png]]
712
713 * Each bits shows if the corresponding trigger has been configured.
714
715
716
717 **Example:**
718
719 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
720
721
722 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
723
724 [[image:image-20220524090249-3.png]]
725
726 * Each bits shows which status has been trigger on this uplink.
727
728
729
730 **Example:**
731
732 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
733
734
735 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
736
737 [[image:image-20220524090456-4.png]]
738
739 * Each bits shows which status has been trigger on this uplink.
740
741
742
743 **Example:**
744
745 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
746
747 00000101: Means both DI1 and DI2 trigger are enabled.
748
749
750 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
751
752 Downlink command to poll MOD6 status:
753
754 **AB 06**
755
756 When device got this command, it will send the MOD6 payload.
757
758
759
760 === 3.3.7 Payload Decoder ===
761
762 (((
763
764
765 **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/]]
766
767
768 )))
769
770
771
772 == 3.4 ​Configure LT via AT or Downlink ==
773
774 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
775
776 (((
777 There are two kinds of Commands:
778 )))
779
780 * (% 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]]
781
782 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
783
784
785
786 === 3.4.1 Common Commands ===
787
788 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]]
789
790
791
792 === 3.4.2 Sensor related commands ===
793
794 ==== 3.4.2.1 Set Transmit Interval ====
795
796 Set device uplink interval.
797
798 * AT Command:
799
800 (% class="box infomessage" %)
801 (((
802 **AT+TDC=N **
803 )))
804
805 **Example: **AT+TDC=30000. Means set interval to 30 seconds
806
807
808 * Downlink Payload (prefix 0x01):
809
810 (% class="box infomessage" %)
811 (((
812 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
813 )))
814
815
816
817 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
818
819 Set work mode.
820
821 * AT Command:
822
823 (% class="box infomessage" %)
824 (((
825 **AT+MOD=N  **
826 )))
827
828 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
829
830
831 * Downlink Payload (prefix 0x0A):
832
833 (% class="box infomessage" %)
834 (((
835 **0x0A aa     ~/~/ Same as AT+MOD=aa**
836 )))
837
838
839
840 ==== 3.4.2.3 Poll an uplink ====
841
842 * AT Command:
843
844 There is no AT Command to poll uplink
845
846
847 * Downlink Payload (prefix 0x08):
848
849 (% class="box infomessage" %)
850 (((
851 **0x08 FF     ~/~/ Poll an uplink,**
852 )))
853
854 **Example**: 0x08FF, ask device to send an Uplink
855
856
857
858 ==== 3.4.2.4 Enable Trigger Mode ====
859
860 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
861
862 * AT Command:
863
864 (% class="box infomessage" %)
865 (((
866 **AT+ADDMOD6=1 or 0**
867 )))
868
869 1: Enable Trigger Mode
870
871 0: Disable Trigger Mode
872
873
874 * Downlink Payload (prefix 0x0A 06):
875
876 (% class="box infomessage" %)
877 (((
878 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
879 )))
880
881
882
883 ==== 3.4.2.5 Poll trigger settings ====
884
885 Poll trigger settings,
886
887 * AT Command:
888
889 There is no AT Command for this feature.
890
891
892 * Downlink Payload (prefix 0x AB 06):
893
894 (% class="box infomessage" %)
895 (((
896 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
897 )))
898
899
900
901 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
902
903 Enable Disable DI1/DI2/DI2 as trigger,
904
905 * AT Command:
906
907 (% class="box infomessage" %)
908 (((
909 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
910 )))
911
912
913 **Example:**
914
915 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
916
917 * Downlink Payload (prefix 0xAA 02):
918
919 (% class="box infomessage" %)
920 (((
921 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
922 )))
923
924
925
926 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
927
928 Set DI1 or DI3(for LT-33222-L) trigger.
929
930 * AT Command:
931
932 (% class="box infomessage" %)
933 (((
934 **AT+TRIG1=a,b**
935 )))
936
937 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
938
939 b : delay timing.
940
941
942 **Example:**
943
944 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
945
946
947 * Downlink Payload (prefix 0x09 01 ):
948
949 (% class="box infomessage" %)
950 (((
951 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
952 )))
953
954
955
956 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
957
958 Set DI2 trigger.
959
960 * AT Command:
961
962 (% class="box infomessage" %)
963 (((
964 **AT+TRIG2=a,b**
965 )))
966
967 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
968
969 b : delay timing.
970
971
972 **Example:**
973
974 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
975
976
977 * Downlink Payload (prefix 0x09 02 ):
978
979 (% class="box infomessage" %)
980 (((
981 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
982 )))
983
984
985
986 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
987
988 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
989
990 * AT Command:
991
992 (% class="box infomessage" %)
993 (((
994 **AT+ACLIM. **
995 )))
996
997
998 * Downlink Payload (prefix 0xAA 01 ):
999
1000 (% class="box infomessage" %)
1001 (((
1002 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1003 )))
1004
1005
1006
1007 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1008
1009 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1010
1011 * AT Command:
1012
1013 (% class="box infomessage" %)
1014 (((
1015 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1016 )))
1017
1018
1019 * Downlink Payload (prefix 0xAA 00 ):
1020
1021 (% class="box infomessage" %)
1022 (((
1023 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1024 )))
1025
1026
1027
1028 ==== 3.4.2.11 Trigger – Set minimum interval ====
1029
1030 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1031
1032 * AT Command:
1033
1034 (% class="box infomessage" %)
1035 (((
1036 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1037 )))
1038
1039
1040 * Downlink Payload (prefix 0xAC ):
1041
1042 (% class="box infomessage" %)
1043 (((
1044 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1045 )))
1046
1047
1048
1049 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1050
1051 * AT Command:
1052
1053 There is no AT Command to control Digital Output
1054
1055
1056 * Downlink Payload (prefix 0x02):
1057
1058 (% class="box infomessage" %)
1059 (((
1060 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1061 )))
1062
1063 (((
1064 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1065 )))
1066
1067 (((
1068 01: Low,  00: High ,  11: No action
1069 )))
1070
1071 [[image:image-20220524092754-5.png]]
1072
1073 (((
1074 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1075 )))
1076
1077 (((
1078 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1079 )))
1080
1081
1082
1083 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1084
1085 * AT Command:
1086
1087 There is no AT Command to control Digital Output
1088
1089
1090 * Downlink Payload (prefix 0xA9):
1091
1092 (% class="box infomessage" %)
1093 (((
1094 (((
1095 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1096 )))
1097 )))
1098
1099 This is to control the digital output time of DO pin. Include four bytes:
1100
1101 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1102
1103 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1104
1105 01: DO pins will change back to original state after timeout.
1106
1107 00: DO pins will change to an inverter state after timeout 
1108
1109
1110 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1111
1112 [[image:image-20220524093238-6.png]]
1113
1114
1115 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1116
1117 [[image:image-20220524093328-7.png]]
1118
1119
1120 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1121
1122 [[image:image-20220524093351-8.png]]
1123
1124
1125 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1126
1127 Latching time. Unit: ms
1128
1129 Device will upload a packet if downlink code executes successfully.
1130
1131
1132 **Example payload:**
1133
1134 **~1. A9 01 01 01 01 07 D0**
1135
1136 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1137
1138 **2. A9 01 00 01 11 07 D0**
1139
1140 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1141
1142 **3. A9 00 00 00 00 07 D0**
1143
1144 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1145
1146 **4. A9 00 11 01 00 07 D0**
1147
1148 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
1149
1150
1151
1152 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1153
1154 * AT Command:
1155
1156 There is no AT Command to control Relay Output
1157
1158
1159 * Downlink Payload (prefix 0x03):
1160
1161 (% class="box infomessage" %)
1162 (((
1163 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1164 )))
1165
1166 (((
1167 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1168 )))
1169
1170 (((
1171 01: Close ,  00: Open , 11: No action
1172 )))
1173
1174 (((
1175 [[image:image-20220524093724-9.png]]
1176 )))
1177
1178 Device will upload a packet if downlink code executes successfully.
1179
1180
1181
1182 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1183
1184 * AT Command:
1185
1186 There is no AT Command to control Relay Output
1187
1188
1189 * Downlink Payload (prefix 0x05):
1190
1191 (% class="box infomessage" %)
1192 (((
1193 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1194 )))
1195
1196 This is to control the relay output time of relay. Include four bytes:
1197
1198 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1199
1200 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1201
1202 01: Relays will change back to original state after timeout.
1203
1204 00: Relays will change to an inverter state after timeout
1205
1206
1207 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1208
1209 [[image:image-20220524093831-10.png]]
1210
1211
1212 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1213
1214 Device will upload a packet if downlink code executes successfully.
1215
1216
1217 **Example payload:**
1218
1219 **~1. 05 01 11 07 D0**
1220
1221 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1222
1223 **2. 05 01 10 07 D0**
1224
1225 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1226
1227 **3. 05 00 01 07 D0**
1228
1229 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1230
1231 **4. 05 00 00 07 D0**
1232
1233 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1234
1235
1236
1237 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1238
1239 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1240
1241 * AT Command:
1242
1243 (% class="box infomessage" %)
1244 (((
1245 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1246 )))
1247
1248
1249 * Downlink Payload (prefix 0xA5):
1250
1251 (% class="box infomessage" %)
1252 (((
1253 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1254 )))
1255
1256
1257
1258 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1259
1260 * AT Command:
1261
1262 (% class="box infomessage" %)
1263 (((
1264 **AT+SETCNT=aa,(bb cc dd ee) **
1265 )))
1266
1267 aa: 1: Set count1,
1268
1269 2: Set count2,
1270
1271 3: Set AV1 count
1272
1273 Bb cc dd ee: number to be set
1274
1275
1276 * Downlink Payload (prefix 0xA8):
1277
1278 (% class="box infomessage" %)
1279 (((
1280 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1281 )))
1282
1283
1284
1285 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1286
1287 Clear counting for counting mode
1288
1289 * AT Command:
1290
1291 (% class="box infomessage" %)
1292 (((
1293 **AT+CLRCOUNT ~/~/ clear all counting**
1294 )))
1295
1296 * Downlink Payload (prefix 0xA6):
1297
1298 (% class="box infomessage" %)
1299 (((
1300 **0x A6 01     ~/~/ clear all counting,**
1301 )))
1302
1303
1304
1305 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1306
1307 * AT Command:
1308
1309 (% class="box infomessage" %)
1310 (((
1311 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1312 )))
1313
1314 * Downlink Payload (prefix 0xA7):
1315
1316 (% class="box infomessage" %)
1317 (((
1318 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1319 )))
1320
1321 (((
1322 range: aa bb cc:0 to 16777215,  (unit:second)
1323
1324
1325 )))
1326
1327
1328 == 3.5 Integrate with Mydevice ==
1329
1330 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:
1331
1332 (((
1333 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1334 )))
1335
1336 (((
1337 (% 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:
1338 )))
1339
1340 [[image:1653356737703-362.png||height="232" width="732"]]
1341
1342 [[image:image-20220524094641-11.png||height="390" width="723"]]
1343
1344
1345 [[image:image-20220524094641-12.png||height="402" width="718"]]
1346
1347
1348 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1349
1350 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1351
1352 Search under The things network
1353
1354 [[image:1653356838789-523.png||height="337" width="740"]]
1355
1356
1357
1358 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1359
1360 [[image:image-20220524094909-1.png||height="335" width="729"]]
1361
1362
1363 [[image:image-20220524094909-2.png||height="337" width="729"]]
1364
1365
1366 [[image:image-20220524094909-3.png||height="338" width="727"]]
1367
1368
1369 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1370
1371
1372 [[image:image-20220524094909-5.png||height="341" width="734"]]
1373
1374
1375
1376 == 3.6 Interface Detail ==
1377
1378 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1379
1380 Support NPN Type sensor
1381
1382 [[image:1653356991268-289.png]]
1383
1384
1385
1386 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1387
1388 (((
1389 The DI port of LT-22222-L can support NPN or PNP output sensor.
1390 )))
1391
1392 (((
1393 (((
1394 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
1395 )))
1396 )))
1397
1398 [[image:1653357170703-587.png]]
1399
1400 (((
1401 (((
1402 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1403 )))
1404 )))
1405
1406 (((
1407
1408 )))
1409
1410 (((
1411 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1412 )))
1413
1414 (((
1415 This type of sensor will output a low signal GND when active.
1416 )))
1417
1418 * (((
1419 Connect sensor’s output to DI1-
1420 )))
1421 * (((
1422 Connect sensor’s VCC to DI1+.
1423 )))
1424
1425 (((
1426 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1427 )))
1428
1429 (((
1430 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1431 )))
1432
1433 (((
1434 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.
1435 )))
1436
1437 (((
1438
1439 )))
1440
1441 (((
1442 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1443 )))
1444
1445 (((
1446 This type of sensor will output a high signal (example 24v) when active.
1447 )))
1448
1449 * (((
1450 Connect sensor’s output to DI1+
1451 )))
1452 * (((
1453 Connect sensor’s GND DI1-.
1454 )))
1455
1456 (((
1457 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1458 )))
1459
1460 (((
1461 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1462 )))
1463
1464 (((
1465 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.
1466 )))
1467
1468 (((
1469
1470 )))
1471
1472 (((
1473 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1474 )))
1475
1476 (((
1477 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1478 )))
1479
1480 * (((
1481 Connect sensor’s output to DI1+ with a serial 50K resistor
1482 )))
1483 * (((
1484 Connect sensor’s GND DI1-.
1485 )))
1486
1487 (((
1488 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1489 )))
1490
1491 (((
1492 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1493 )))
1494
1495 (((
1496 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.
1497 )))
1498
1499
1500
1501 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1502
1503 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1504
1505 [[image:1653357531600-905.png]]
1506
1507
1508
1509 === 3.6.4 Analog Input Interface ===
1510
1511 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:
1512
1513
1514 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1515
1516 [[image:1653357592296-182.png]]
1517
1518 Example to connect a 4~~20mA sensor
1519
1520 We take the wind speed sensor as an example for reference only.
1521
1522
1523 **Specifications of the wind speed sensor:**
1524
1525 Red:  12~~24v
1526
1527 Yellow:  4~~20mA
1528
1529 Black:  GND
1530
1531
1532 **Connection diagram:**
1533
1534 [[image:1653357640609-758.png]]
1535
1536 [[image:1653357648330-671.png||height="155" width="733"]]
1537
1538
1539
1540 === 3.6.5 Relay Output ===
1541
1542 (((
1543 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:
1544 )))
1545
1546 [[image:image-20220524100215-9.png]]
1547
1548 [[image:image-20220524100215-10.png||height="382" width="723"]]
1549
1550
1551
1552 == 3.7 LEDs Indicators ==
1553
1554 [[image:image-20220524100748-11.png]]
1555
1556
1557 = 4. Use AT Command =
1558
1559 == 4.1 Access AT Command ==
1560
1561 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.
1562
1563 [[image:1653358238933-385.png]]
1564
1565
1566 (((
1567 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:
1568 )))
1569
1570 [[image:1653358355238-883.png]]
1571
1572
1573 (((
1574 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/]]
1575 )))
1576
1577 (((
1578 AT+<CMD>?        : Help on <CMD>
1579 )))
1580
1581 (((
1582 AT+<CMD>         : Run <CMD>
1583 )))
1584
1585 (((
1586 AT+<CMD>=<value> : Set the value
1587 )))
1588
1589 (((
1590 AT+<CMD>=?       : Get the value
1591 )))
1592
1593 (((
1594 ATZ: Trig a reset of the MCU
1595 )))
1596
1597 (((
1598 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1599 )))
1600
1601 (((
1602 AT+DEUI: Get or Set the Device EUI
1603 )))
1604
1605 (((
1606 AT+DADDR: Get or Set the Device Address
1607 )))
1608
1609 (((
1610 AT+APPKEY: Get or Set the Application Key
1611 )))
1612
1613 (((
1614 AT+NWKSKEY: Get or Set the Network Session Key
1615 )))
1616
1617 (((
1618 AT+APPSKEY: Get or Set the Application Session Key
1619 )))
1620
1621 (((
1622 AT+APPEUI: Get or Set the Application EUI
1623 )))
1624
1625 (((
1626 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1627 )))
1628
1629 (((
1630 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1631 )))
1632
1633 (((
1634 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1635 )))
1636
1637 (((
1638 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1639 )))
1640
1641 (((
1642 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1643 )))
1644
1645 (((
1646 AT+RX2FQ: Get or Set the Rx2 window frequency
1647 )))
1648
1649 (((
1650 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1651 )))
1652
1653 (((
1654 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1655 )))
1656
1657 (((
1658 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1659 )))
1660
1661 (((
1662 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1663 )))
1664
1665 (((
1666 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1667 )))
1668
1669 (((
1670 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1671 )))
1672
1673 (((
1674 AT+NWKID: Get or Set the Network ID
1675 )))
1676
1677 (((
1678 AT+FCU: Get or Set the Frame Counter Uplink
1679 )))
1680
1681 (((
1682 AT+FCD: Get or Set the Frame Counter Downlink
1683 )))
1684
1685 (((
1686 AT+CLASS: Get or Set the Device Class
1687 )))
1688
1689 (((
1690 AT+JOIN: Join network
1691 )))
1692
1693 (((
1694 AT+NJS: Get OTAA Join Status
1695 )))
1696
1697 (((
1698 AT+SENDB: Send hexadecimal data along with the application port
1699 )))
1700
1701 (((
1702 AT+SEND: Send text data along with the application port
1703 )))
1704
1705 (((
1706 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1707 )))
1708
1709 (((
1710 AT+RECV: Print last received data in raw format
1711 )))
1712
1713 (((
1714 AT+VER: Get current image version and Frequency Band
1715 )))
1716
1717 (((
1718 AT+CFM: Get or Set the confirmation mode (0-1)
1719 )))
1720
1721 (((
1722 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1723 )))
1724
1725 (((
1726 AT+SNR: Get the SNR of the last received packet
1727 )))
1728
1729 (((
1730 AT+RSSI: Get the RSSI of the last received packet
1731 )))
1732
1733 (((
1734 AT+TDC: Get or set the application data transmission interval in ms
1735 )))
1736
1737 (((
1738 AT+PORT: Get or set the application port
1739 )))
1740
1741 (((
1742 AT+DISAT: Disable AT commands
1743 )))
1744
1745 (((
1746 AT+PWORD: Set password, max 9 digits
1747 )))
1748
1749 (((
1750 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1751 )))
1752
1753 (((
1754 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1755 )))
1756
1757 (((
1758 AT+CFG: Print all settings
1759
1760
1761 )))
1762
1763
1764
1765 == 4.2 Common AT Command Sequence ==
1766
1767 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1768
1769 (((
1770
1771
1772 **If device has not joined network yet:**
1773 )))
1774
1775 (((
1776 (% style="background-color:#dcdcdc" %)123456
1777 )))
1778
1779 (((
1780 (% style="background-color:#dcdcdc" %)AT+FDR
1781 )))
1782
1783 (((
1784 (% style="background-color:#dcdcdc" %)123456
1785 )))
1786
1787 (((
1788 (% style="background-color:#dcdcdc" %)AT+NJM=0
1789 )))
1790
1791 (((
1792 (% style="background-color:#dcdcdc" %)ATZ
1793 )))
1794
1795
1796 (((
1797 **If device already joined network:**
1798 )))
1799
1800 (((
1801 (% style="background-color:#dcdcdc" %)AT+NJM=0
1802 )))
1803
1804 (((
1805 (% style="background-color:#dcdcdc" %)ATZ
1806
1807
1808 )))
1809
1810
1811
1812 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1813
1814 (((
1815
1816
1817 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1818 )))
1819
1820 (((
1821 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1822 )))
1823
1824 (((
1825 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1826 )))
1827
1828 (((
1829 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1830 )))
1831
1832 (((
1833 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1834 )))
1835
1836 (((
1837 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1838 )))
1839
1840 (((
1841 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1842 )))
1843
1844 (((
1845 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1846 )))
1847
1848 (((
1849 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1850 )))
1851
1852 (((
1853 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1854 )))
1855
1856 (((
1857 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1858 )))
1859
1860 (((
1861 (% 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.
1862 )))
1863
1864 (((
1865 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1866
1867
1868 )))
1869
1870 (((
1871 (% style="color:red" %)**Note:**
1872 )))
1873
1874 (((
1875 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1876 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1877 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.
1878 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
1879 )))
1880
1881 (((
1882 [[image:1653359097980-169.png||height="188" width="729"]]
1883 )))
1884
1885 (((
1886
1887 )))
1888
1889
1890 === 4.2.3 Change to Class A ===
1891
1892 If sensor JOINED
1893 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1894 ATZ
1895
1896
1897 = 5. FAQ =
1898
1899 == 5.1 How to upgrade the image? ==
1900
1901
1902 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1903
1904 * Support new features
1905 * For bug fix
1906 * Change LoRaWAN bands.
1907
1908 Below shows the hardware connection for how to upload an image to the LT:
1909
1910 [[image:1653359603330-121.png]]
1911
1912
1913 (((
1914 (% 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]].
1915 (% 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/]].
1916 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1917
1918
1919 (% style="color:blue" %)**For LT-22222-L**(%%):
1920 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.
1921 )))
1922
1923 [[image:image-20220524103407-12.png]]
1924
1925 [[image:image-20220524103429-13.png]]
1926
1927 [[image:image-20220524104033-15.png]]
1928
1929
1930 (% 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:
1931
1932 [[image:1653360054704-518.png||height="186" width="745"]]
1933
1934
1935 (((
1936 (((
1937
1938
1939 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1940 )))
1941 )))
1942
1943 (((
1944 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1945 )))
1946
1947 (((
1948
1949
1950 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1951 )))
1952
1953 (((
1954 (((
1955 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1956 )))
1957 )))
1958
1959 (((
1960 (((
1961 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1962
1963
1964 )))
1965 )))
1966
1967 (((
1968 (% 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.
1969 )))
1970
1971 (((
1972 [[image:1653360231087-571.png||height="401" width="727"]]
1973 )))
1974
1975 (((
1976 (% 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.
1977 )))
1978
1979
1980 (((
1981 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1982 )))
1983
1984 (((
1985 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1986 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1987 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1988 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1989 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1990 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1991 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1992 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1993 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1994 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1995 )))
1996
1997
1998 (((
1999 As shown in below:
2000 )))
2001
2002 [[image:1653360498588-932.png||height="485" width="726"]]
2003
2004
2005 == 5.4 Can I see counting event in Serial? ==
2006
2007 (((
2008 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.
2009
2010
2011 == 5.5 Can i use point to point communication for LT-22222-L? ==
2012
2013 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2014 )))
2015
2016 (((
2017
2018
2019 = 6. Trouble Shooting =
2020 )))
2021
2022 (((
2023 (((
2024 == 6.1 Downlink doesn’t work, how to solve it? ==
2025 )))
2026 )))
2027
2028 (((
2029 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2030 )))
2031
2032 (((
2033
2034
2035 == 6.2 Have trouble to upload image. ==
2036 )))
2037
2038 (((
2039 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2040 )))
2041
2042 (((
2043
2044
2045 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2046 )))
2047
2048 (((
2049 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2050 )))
2051
2052
2053
2054 = 7. Order Info =
2055
2056
2057 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2058
2059
2060 (% style="color:#4f81bd" %)**XXX:**
2061
2062 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2063 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2064 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2065 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2066 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2067 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2068 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2069 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2070 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2071
2072 = 8. Packing Info =
2073
2074
2075 **Package Includes**:
2076
2077 * LT-22222-L I/O Controller x 1
2078 * Stick Antenna for LoRa RF part x 1
2079 * Bracket for controller x1
2080 * Program cable x 1
2081
2082 **Dimension and weight**:
2083
2084 * Device Size: 13.5 x 7 x 3 cm
2085 * Device Weight: 105g
2086 * Package Size / pcs : 14.5 x 8 x 5 cm
2087 * Weight / pcs : 170g
2088
2089 = 9. Support =
2090
2091 * (((
2092 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.
2093 )))
2094 * (((
2095 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]]
2096 )))
2097
2098 = 10. Reference​​​​​ =
2099
2100 * 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]]
2101 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2102 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2103 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

Applications

Navigation

Copyright ©2010-2024 Dragino Technology Co., LTD. All rights reserved
Dragino Wiki v2.0