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Version 77.85 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
331 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
332
333 (((
334 Total : 11 bytes payload
335 )))
336
337 [[image:image-20220523180452-3.png]]
338
339
340 (((
341 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
342 )))
343
344 [[image:image-20220523180506-4.png]]
345
346 * RO is for relay. ROx=1 : close，ROx=0 always open.
347 * FIRST: Indicate this is the first packet after join network.
348 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
349
350 (((
351 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
352 )))
353
354 (((
355
356
357 **To use counting mode, please run:**
358 )))
359
360 (% class="box infomessage" %)
361 (((
362 (((
363 **AT+MOD=2**
364 )))
365 )))
366
367 (% class="box infomessage" %)
368 (((
369 (((
370 **ATZ**
371 )))
372 )))
373
374 (((
375
376
377 (% style="color:#4f81bd" %)**AT Commands for counting:**
378 )))
379
380 (((
381 **For LT22222-L:**
382 )))
383
384 (% class="box infomessage" %)
385 (((
386 (((
387 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
388 )))
389 )))
390
391 (% class="box infomessage" %)
392 (((
393 (((
394 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
395 )))
396 )))
397
398 (% class="box infomessage" %)
399 (((
400 (((
401 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
402 )))
403 )))
404
405 (% class="box infomessage" %)
406 (((
407 (((
408 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
409 )))
410 )))
411
412 (% class="box infomessage" %)
413 (((
414 (((
415 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
416 )))
417 )))
418
419 (% class="box infomessage" %)
420 (((
421 (((
422 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
423 )))
424 )))
425
426
427
428 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
429
430 **LT22222-L**: This mode the DI1 is used as a counting pin.
431
432 [[image:image-20220523181246-5.png]]
433
434 (((
435 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
436 )))
437
438 [[image:image-20220523181301-6.png]]
439
440 * RO is for relay. ROx=1 : close，ROx=0 always open.
441 * FIRST: Indicate this is the first packet after join network.
442 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
443
444 (((
445 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
446 )))
447
448 (((
449 **To use counting mode, please run:**
450 )))
451
452 (% class="box infomessage" %)
453 (((
454 (((
455 **AT+MOD=3**
456 )))
457 )))
458
459 (% class="box infomessage" %)
460 (((
461 (((
462 **ATZ**
463 )))
464 )))
465
466 (((
467 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
468
469
470 )))
471
472
473 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
474
475
476 **LT22222-L**: This mode the DI1 is used as a counting pin.
477
478 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.
479
480 [[image:image-20220523181903-8.png]]
481
482
483 (((
484 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
485 )))
486
487 [[image:image-20220523181727-7.png]]
488
489 * RO is for relay. ROx=1 : close，ROx=0 always open.
490 * FIRST: Indicate this is the first packet after join network.
491 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
492
493 (((
494 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
495 )))
496
497 (((
498
499
500 **To use this mode, please run:**
501 )))
502
503 (% class="box infomessage" %)
504 (((
505 (((
506 **AT+MOD=4**
507 )))
508 )))
509
510 (% class="box infomessage" %)
511 (((
512 (((
513 **ATZ**
514 )))
515 )))
516
517 (((
518
519 )))
520
521 (((
522 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
523 )))
524
525 (((
526
527
528 **Plus below command for AVI1 Counting:**
529 )))
530
531 (% class="box infomessage" %)
532 (((
533 (((
534 **AT+SETCNT=3,60   (set AVI Count to 60)**
535 )))
536 )))
537
538 (% class="box infomessage" %)
539 (((
540 (((
541 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
542 )))
543 )))
544
545 (% class="box infomessage" %)
546 (((
547 (((
548 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
549 )))
550 )))
551
552 (% class="box infomessage" %)
553 (((
554 (((
555 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
556 )))
557 )))
558
559
560
561 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
562
563
564 **LT22222-L**: This mode the DI1 is used as a counting pin.
565
566 [[image:image-20220523182334-9.png]]
567
568 (((
569
570
571 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
572 )))
573
574 * RO is for relay. ROx=1 : close，ROx=0 always open.
575 * FIRST: Indicate this is the first packet after join network.
576 * (((
577 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
578 )))
579
580 (((
581 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
582 )))
583
584 (((
585
586
587 **To use this mode, please run:**
588 )))
589
590 (% class="box infomessage" %)
591 (((
592 (((
593 **AT+MOD=5**
594 )))
595 )))
596
597 (% class="box infomessage" %)
598 (((
599 (((
600 **ATZ**
601 )))
602 )))
603
604 (((
605 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
606 )))
607
608
609
610 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
611
612
613 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
614
615 For example, if user has configured below commands:
616
617 * **AT+MOD=1 ** **~-~->** The normal working mode
618 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
619
620
621 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
622
623 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
624 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.**
625
626
627 **AT Command to set Trigger Condition**:
628
629 (% style="color:#4f81bd" %)**Trigger base on voltage**:
630
631 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
632
633 **Example:**
634
635 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)
636
637 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
638
639
640 (% style="color:#4f81bd" %)**Trigger base on current**:
641
642 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
643
644 **Example:**
645
646 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
647
648
649 (% style="color:#4f81bd" %)**Trigger base on DI status**:
650
651 DI status trigger Flag.
652
653 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
654
655 **Example:**
656
657 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
658
659
660 **Downlink Command to set Trigger Condition**
661
662 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
663
664 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
665
666 AA: Code for this downlink Command:
667
668 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
669
670 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
671
672 yy2 yy2: AC1 or AV1 high limit.
673
674 yy3 yy3: AC2 or AV2 low limit.
675
676 Yy4 yy4: AC2 or AV2 high limit.
677
678
679 **Example1**: AA 00 13 88 00 00 00 00 00 00
680
681 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
682
683
684 **Example2**: AA 02 01 00
685
686 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
687
688
689 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
690
691 MOD6 Payload : total 11 bytes payload
692
693 [[image:image-20220524085923-1.png]]
694
695
696 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
697
698 [[image:image-20220524090106-2.png]]
699
700 * Each bits shows if the corresponding trigger has been configured.
701
702
703 **Example:**
704
705 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
706
707
708 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
709
710 [[image:image-20220524090249-3.png]]
711
712 * Each bits shows which status has been trigger on this uplink.
713
714
715 **Example:**
716
717 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
718
719
720 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
721
722 [[image:image-20220524090456-4.png]]
723
724 * Each bits shows which status has been trigger on this uplink.
725
726
727 **Example:**
728
729 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
730
731 00000101: Means both DI1 and DI2 trigger are enabled.
732
733
734 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
735
736 Downlink command to poll MOD6 status:
737
738 **AB 06**
739
740 When device got this command, it will send the MOD6 payload.
741
742
743
744 === 3.3.7 Payload Decoder ===
745
746 (((
747
748
749 **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/]]
750
751
752 )))
753
754
755
756 == 3.4 ​Configure LT via AT or Downlink ==
757
758 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
759
760 (((
761 There are two kinds of Commands:
762 )))
763
764 * (% 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]]
765
766 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
767
768
769
770 === 3.4.1 Common Commands ===
771
772 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]]
773
774
775
776 === 3.4.2 Sensor related commands ===
777
778 ==== 3.4.2.1 Set Transmit Interval ====
779
780 Set device uplink interval.
781
782 * AT Command:
783
784 (% class="box infomessage" %)
785 (((
786 **AT+TDC=N **
787 )))
788
789 **Example: **AT+TDC=30000. Means set interval to 30 seconds
790
791
792 * Downlink Payload (prefix 0x01):
793
794 (% class="box infomessage" %)
795 (((
796 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
797 )))
798
799
800
801 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
802
803 Set work mode.
804
805 * AT Command:
806
807 (% class="box infomessage" %)
808 (((
809 **AT+MOD=N  **
810 )))
811
812 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
813
814
815 * Downlink Payload (prefix 0x0A):
816
817 (% class="box infomessage" %)
818 (((
819 **0x0A aa     ~/~/ Same as AT+MOD=aa**
820 )))
821
822
823
824 ==== 3.4.2.3 Poll an uplink ====
825
826 * AT Command:
827
828 There is no AT Command to poll uplink
829
830
831 * Downlink Payload (prefix 0x08):
832
833 (% class="box infomessage" %)
834 (((
835 **0x08 FF     ~/~/ Poll an uplink,**
836 )))
837
838 **Example**: 0x08FF, ask device to send an Uplink
839
840
841
842 ==== 3.4.2.4 Enable Trigger Mode ====
843
844 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
845
846 * AT Command:
847
848 (% class="box infomessage" %)
849 (((
850 **AT+ADDMOD6=1 or 0**
851 )))
852
853 1: Enable Trigger Mode
854
855 0: Disable Trigger Mode
856
857
858 * Downlink Payload (prefix 0x0A 06):
859
860 (% class="box infomessage" %)
861 (((
862 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
863 )))
864
865
866
867 ==== 3.4.2.5 Poll trigger settings ====
868
869 Poll trigger settings,
870
871 * AT Command:
872
873 There is no AT Command for this feature.
874
875
876 * Downlink Payload (prefix 0x AB 06):
877
878 (% class="box infomessage" %)
879 (((
880 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
881 )))
882
883
884
885 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
886
887 Enable Disable DI1/DI2/DI2 as trigger,
888
889 * AT Command:
890
891 (% class="box infomessage" %)
892 (((
893 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
894 )))
895
896
897 **Example:**
898
899 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
900
901 * Downlink Payload (prefix 0xAA 02):
902
903 (% class="box infomessage" %)
904 (((
905 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
906 )))
907
908
909
910 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
911
912 Set DI1 or DI3(for LT-33222-L) trigger.
913
914 * AT Command:
915
916 (% class="box infomessage" %)
917 (((
918 **AT+TRIG1=a,b**
919 )))
920
921 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
922
923 b : delay timing.
924
925
926 **Example:**
927
928 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
929
930
931 * Downlink Payload (prefix 0x09 01 ):
932
933 (% class="box infomessage" %)
934 (((
935 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
936 )))
937
938
939
940 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
941
942 Set DI2 trigger.
943
944 * AT Command:
945
946 (% class="box infomessage" %)
947 (((
948 **AT+TRIG2=a,b**
949 )))
950
951 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
952
953 b : delay timing.
954
955
956 **Example:**
957
958 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
959
960
961 * Downlink Payload (prefix 0x09 02 ):
962
963 (% class="box infomessage" %)
964 (((
965 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
966 )))
967
968
969
970 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
971
972 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
973
974 * AT Command:
975
976 (% class="box infomessage" %)
977 (((
978 **AT+ACLIM. **
979 )))
980
981
982 * Downlink Payload (prefix 0xAA 01 ):
983
984 (% class="box infomessage" %)
985 (((
986 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
987 )))
988
989
990
991 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
992
993 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
994
995 * AT Command:
996
997 (% class="box infomessage" %)
998 (((
999 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1000 )))
1001
1002
1003 * Downlink Payload (prefix 0xAA 00 ):
1004
1005 (% class="box infomessage" %)
1006 (((
1007 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1008 )))
1009
1010
1011
1012 ==== 3.4.2.11 Trigger – Set minimum interval ====
1013
1014 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1015
1016 * AT Command:
1017
1018 (% class="box infomessage" %)
1019 (((
1020 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1021 )))
1022
1023
1024 * Downlink Payload (prefix 0xAC ):
1025
1026 (% class="box infomessage" %)
1027 (((
1028 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1029 )))
1030
1031
1032
1033 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1034
1035 * AT Command:
1036
1037 There is no AT Command to control Digital Output
1038
1039
1040 * Downlink Payload (prefix 0x02):
1041
1042 (% class="box infomessage" %)
1043 (((
1044 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1045 )))
1046
1047 (((
1048 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1049 )))
1050
1051 (((
1052 01: Low,  00: High ,  11: No action
1053 )))
1054
1055 [[image:image-20220524092754-5.png]]
1056
1057 (((
1058 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1059 )))
1060
1061 (((
1062 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1063 )))
1064
1065
1066
1067 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1068
1069 * AT Command:
1070
1071 There is no AT Command to control Digital Output
1072
1073
1074 * Downlink Payload (prefix 0xA9):
1075
1076 (% class="box infomessage" %)
1077 (((
1078 (((
1079 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1080 )))
1081 )))
1082
1083 This is to control the digital output time of DO pin. Include four bytes:
1084
1085 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1086
1087 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1088
1089 01: DO pins will change back to original state after timeout.
1090
1091 00: DO pins will change to an inverter state after timeout 
1092
1093
1094 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1095
1096 [[image:image-20220524093238-6.png]]
1097
1098
1099 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1100
1101 [[image:image-20220524093328-7.png]]
1102
1103
1104 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1105
1106 [[image:image-20220524093351-8.png]]
1107
1108
1109 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1110
1111 Latching time. Unit: ms
1112
1113 Device will upload a packet if downlink code executes successfully.
1114
1115
1116 **Example payload:**
1117
1118 **~1. A9 01 01 01 01 07 D0**
1119
1120 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1121
1122 **2. A9 01 00 01 11 07 D0**
1123
1124 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1125
1126 **3. A9 00 00 00 00 07 D0**
1127
1128 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1129
1130 **4. A9 00 11 01 00 07 D0**
1131
1132 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
1133
1134
1135
1136 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1137
1138 * AT Command:
1139
1140 There is no AT Command to control Relay Output
1141
1142
1143 * Downlink Payload (prefix 0x03):
1144
1145 (% class="box infomessage" %)
1146 (((
1147 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1148 )))
1149
1150 (((
1151 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1152 )))
1153
1154 (((
1155 01: Close ,  00: Open , 11: No action
1156 )))
1157
1158 (((
1159 [[image:image-20220524093724-9.png]]
1160 )))
1161
1162 Device will upload a packet if downlink code executes successfully.
1163
1164
1165
1166 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1167
1168 * AT Command:
1169
1170 There is no AT Command to control Relay Output
1171
1172
1173 * Downlink Payload (prefix 0x05):
1174
1175 (% class="box infomessage" %)
1176 (((
1177 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1178 )))
1179
1180 This is to control the relay output time of relay. Include four bytes:
1181
1182 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1183
1184 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1185
1186 01: Relays will change back to original state after timeout.
1187
1188 00: Relays will change to an inverter state after timeout
1189
1190
1191 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1192
1193 [[image:image-20220524093831-10.png]]
1194
1195
1196 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1197
1198 Device will upload a packet if downlink code executes successfully.
1199
1200
1201 **Example payload:**
1202
1203 **~1. 05 01 11 07 D0**
1204
1205 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1206
1207 **2. 05 01 10 07 D0**
1208
1209 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1210
1211 **3. 05 00 01 07 D0**
1212
1213 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1214
1215 **4. 05 00 00 07 D0**
1216
1217 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1218
1219
1220
1221 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1222
1223 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1224
1225 * AT Command:
1226
1227 (% class="box infomessage" %)
1228 (((
1229 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1230 )))
1231
1232
1233 * Downlink Payload (prefix 0xA5):
1234
1235 (% class="box infomessage" %)
1236 (((
1237 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1238 )))
1239
1240
1241
1242 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1243
1244 * AT Command:
1245
1246 (% class="box infomessage" %)
1247 (((
1248 **AT+SETCNT=aa,(bb cc dd ee) **
1249 )))
1250
1251 aa: 1: Set count1,
1252
1253 2: Set count2,
1254
1255 3: Set AV1 count
1256
1257 Bb cc dd ee: number to be set
1258
1259
1260 * Downlink Payload (prefix 0xA8):
1261
1262 (% class="box infomessage" %)
1263 (((
1264 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1265 )))
1266
1267
1268
1269 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1270
1271 Clear counting for counting mode
1272
1273 * AT Command:
1274
1275 (% class="box infomessage" %)
1276 (((
1277 **AT+CLRCOUNT ~/~/ clear all counting**
1278 )))
1279
1280 * Downlink Payload (prefix 0xA6):
1281
1282 (% class="box infomessage" %)
1283 (((
1284 **0x A6 01     ~/~/ clear all counting,**
1285 )))
1286
1287
1288
1289 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1290
1291 * AT Command:
1292
1293 (% class="box infomessage" %)
1294 (((
1295 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1296 )))
1297
1298 * Downlink Payload (prefix 0xA7):
1299
1300 (% class="box infomessage" %)
1301 (((
1302 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1303 )))
1304
1305 (((
1306 range: aa bb cc:0 to 16777215,  (unit:second)
1307
1308
1309 )))
1310
1311
1312 == 3.5 Integrate with Mydevice ==
1313
1314 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:
1315
1316 (((
1317 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1318 )))
1319
1320 (((
1321 (% 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:
1322 )))
1323
1324 [[image:1653356737703-362.png||height="232" width="732"]]
1325
1326 [[image:image-20220524094641-11.png||height="390" width="723"]]
1327
1328
1329 [[image:image-20220524094641-12.png||height="402" width="718"]]
1330
1331
1332 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1333
1334 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1335
1336 Search under The things network
1337
1338 [[image:1653356838789-523.png||height="337" width="740"]]
1339
1340
1341
1342 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1343
1344 [[image:image-20220524094909-1.png||height="335" width="729"]]
1345
1346
1347 [[image:image-20220524094909-2.png||height="337" width="729"]]
1348
1349
1350 [[image:image-20220524094909-3.png||height="338" width="727"]]
1351
1352
1353 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1354
1355
1356 [[image:image-20220524094909-5.png||height="341" width="734"]]
1357
1358
1359
1360 == 3.6 Interface Detail ==
1361
1362 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1363
1364 Support NPN Type sensor
1365
1366 [[image:1653356991268-289.png]]
1367
1368
1369
1370 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1371
1372 (((
1373 The DI port of LT-22222-L can support NPN or PNP output sensor.
1374 )))
1375
1376 (((
1377 (((
1378 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
1379 )))
1380 )))
1381
1382 [[image:1653357170703-587.png]]
1383
1384 (((
1385 (((
1386 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1387 )))
1388 )))
1389
1390 (((
1391
1392 )))
1393
1394 (((
1395 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1396 )))
1397
1398 (((
1399 This type of sensor will output a low signal GND when active.
1400 )))
1401
1402 * (((
1403 Connect sensor’s output to DI1-
1404 )))
1405 * (((
1406 Connect sensor’s VCC to DI1+.
1407 )))
1408
1409 (((
1410 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1411 )))
1412
1413 (((
1414 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1415 )))
1416
1417 (((
1418 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.
1419 )))
1420
1421 (((
1422
1423 )))
1424
1425 (((
1426 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1427 )))
1428
1429 (((
1430 This type of sensor will output a high signal (example 24v) when active.
1431 )))
1432
1433 * (((
1434 Connect sensor’s output to DI1+
1435 )))
1436 * (((
1437 Connect sensor’s GND DI1-.
1438 )))
1439
1440 (((
1441 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1442 )))
1443
1444 (((
1445 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1446 )))
1447
1448 (((
1449 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.
1450 )))
1451
1452 (((
1453
1454 )))
1455
1456 (((
1457 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1458 )))
1459
1460 (((
1461 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1462 )))
1463
1464 * (((
1465 Connect sensor’s output to DI1+ with a serial 50K resistor
1466 )))
1467 * (((
1468 Connect sensor’s GND DI1-.
1469 )))
1470
1471 (((
1472 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1473 )))
1474
1475 (((
1476 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1477 )))
1478
1479 (((
1480 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.
1481 )))
1482
1483
1484
1485 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1486
1487 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1488
1489 [[image:1653357531600-905.png]]
1490
1491
1492
1493 === 3.6.4 Analog Input Interface ===
1494
1495 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:
1496
1497
1498 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1499
1500 [[image:1653357592296-182.png]]
1501
1502 Example to connect a 4~~20mA sensor
1503
1504 We take the wind speed sensor as an example for reference only.
1505
1506
1507 **Specifications of the wind speed sensor:**
1508
1509 Red:  12~~24v
1510
1511 Yellow:  4~~20mA
1512
1513 Black:  GND
1514
1515
1516 **Connection diagram:**
1517
1518 [[image:1653357640609-758.png]]
1519
1520 [[image:1653357648330-671.png||height="155" width="733"]]
1521
1522
1523
1524 === 3.6.5 Relay Output ===
1525
1526 (((
1527 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:
1528 )))
1529
1530 [[image:image-20220524100215-9.png]]
1531
1532 [[image:image-20220524100215-10.png||height="382" width="723"]]
1533
1534
1535
1536 == 3.7 LEDs Indicators ==
1537
1538 [[image:image-20220524100748-11.png]]
1539
1540
1541 = 4. Use AT Command =
1542
1543 == 4.1 Access AT Command ==
1544
1545 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.
1546
1547 [[image:1653358238933-385.png]]
1548
1549
1550 (((
1551 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:
1552 )))
1553
1554 [[image:1653358355238-883.png]]
1555
1556
1557 (((
1558 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/]]
1559 )))
1560
1561 (((
1562 AT+<CMD>?        : Help on <CMD>
1563 )))
1564
1565 (((
1566 AT+<CMD>         : Run <CMD>
1567 )))
1568
1569 (((
1570 AT+<CMD>=<value> : Set the value
1571 )))
1572
1573 (((
1574 AT+<CMD>=?       : Get the value
1575 )))
1576
1577 (((
1578 ATZ: Trig a reset of the MCU
1579 )))
1580
1581 (((
1582 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1583 )))
1584
1585 (((
1586 AT+DEUI: Get or Set the Device EUI
1587 )))
1588
1589 (((
1590 AT+DADDR: Get or Set the Device Address
1591 )))
1592
1593 (((
1594 AT+APPKEY: Get or Set the Application Key
1595 )))
1596
1597 (((
1598 AT+NWKSKEY: Get or Set the Network Session Key
1599 )))
1600
1601 (((
1602 AT+APPSKEY: Get or Set the Application Session Key
1603 )))
1604
1605 (((
1606 AT+APPEUI: Get or Set the Application EUI
1607 )))
1608
1609 (((
1610 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1611 )))
1612
1613 (((
1614 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1615 )))
1616
1617 (((
1618 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1619 )))
1620
1621 (((
1622 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1623 )))
1624
1625 (((
1626 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1627 )))
1628
1629 (((
1630 AT+RX2FQ: Get or Set the Rx2 window frequency
1631 )))
1632
1633 (((
1634 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1635 )))
1636
1637 (((
1638 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1639 )))
1640
1641 (((
1642 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1643 )))
1644
1645 (((
1646 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1647 )))
1648
1649 (((
1650 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1651 )))
1652
1653 (((
1654 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1655 )))
1656
1657 (((
1658 AT+NWKID: Get or Set the Network ID
1659 )))
1660
1661 (((
1662 AT+FCU: Get or Set the Frame Counter Uplink
1663 )))
1664
1665 (((
1666 AT+FCD: Get or Set the Frame Counter Downlink
1667 )))
1668
1669 (((
1670 AT+CLASS: Get or Set the Device Class
1671 )))
1672
1673 (((
1674 AT+JOIN: Join network
1675 )))
1676
1677 (((
1678 AT+NJS: Get OTAA Join Status
1679 )))
1680
1681 (((
1682 AT+SENDB: Send hexadecimal data along with the application port
1683 )))
1684
1685 (((
1686 AT+SEND: Send text data along with the application port
1687 )))
1688
1689 (((
1690 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1691 )))
1692
1693 (((
1694 AT+RECV: Print last received data in raw format
1695 )))
1696
1697 (((
1698 AT+VER: Get current image version and Frequency Band
1699 )))
1700
1701 (((
1702 AT+CFM: Get or Set the confirmation mode (0-1)
1703 )))
1704
1705 (((
1706 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1707 )))
1708
1709 (((
1710 AT+SNR: Get the SNR of the last received packet
1711 )))
1712
1713 (((
1714 AT+RSSI: Get the RSSI of the last received packet
1715 )))
1716
1717 (((
1718 AT+TDC: Get or set the application data transmission interval in ms
1719 )))
1720
1721 (((
1722 AT+PORT: Get or set the application port
1723 )))
1724
1725 (((
1726 AT+DISAT: Disable AT commands
1727 )))
1728
1729 (((
1730 AT+PWORD: Set password, max 9 digits
1731 )))
1732
1733 (((
1734 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1735 )))
1736
1737 (((
1738 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1739 )))
1740
1741 (((
1742 AT+CFG: Print all settings
1743
1744
1745 )))
1746
1747
1748
1749 == 4.2 Common AT Command Sequence ==
1750
1751 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1752
1753 (((
1754
1755
1756 **If device has not joined network yet:**
1757 )))
1758
1759 (((
1760 (% style="background-color:#dcdcdc" %)123456
1761 )))
1762
1763 (((
1764 (% style="background-color:#dcdcdc" %)AT+FDR
1765 )))
1766
1767 (((
1768 (% style="background-color:#dcdcdc" %)123456
1769 )))
1770
1771 (((
1772 (% style="background-color:#dcdcdc" %)AT+NJM=0
1773 )))
1774
1775 (((
1776 (% style="background-color:#dcdcdc" %)ATZ
1777 )))
1778
1779
1780 (((
1781 **If device already joined network:**
1782 )))
1783
1784 (((
1785 (% style="background-color:#dcdcdc" %)AT+NJM=0
1786 )))
1787
1788 (((
1789 (% style="background-color:#dcdcdc" %)ATZ
1790
1791
1792 )))
1793
1794
1795
1796 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1797
1798 (((
1799
1800
1801 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1802 )))
1803
1804 (((
1805 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1806 )))
1807
1808 (((
1809 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1810 )))
1811
1812 (((
1813 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1814 )))
1815
1816 (((
1817 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1818 )))
1819
1820 (((
1821 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1822 )))
1823
1824 (((
1825 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1826 )))
1827
1828 (((
1829 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1830 )))
1831
1832 (((
1833 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1834 )))
1835
1836 (((
1837 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1838 )))
1839
1840 (((
1841 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1842 )))
1843
1844 (((
1845 (% 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.
1846 )))
1847
1848 (((
1849 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1850
1851
1852 )))
1853
1854 (((
1855 (% style="color:red" %)**Note:**
1856 )))
1857
1858 (((
1859 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1860 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1861 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.
1862 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
1863 )))
1864
1865 (((
1866 [[image:1653359097980-169.png||height="188" width="729"]]
1867 )))
1868
1869 (((
1870
1871 )))
1872
1873
1874 === 4.2.3 Change to Class A ===
1875
1876 If sensor JOINED
1877 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1878 ATZ
1879
1880
1881 = 5. FAQ =
1882
1883 == 5.1 How to upgrade the image? ==
1884
1885
1886 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1887
1888 * Support new features
1889 * For bug fix
1890 * Change LoRaWAN bands.
1891
1892 Below shows the hardware connection for how to upload an image to the LT:
1893
1894 [[image:1653359603330-121.png]]
1895
1896
1897 (((
1898 (% 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]].
1899 (% 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/]].
1900 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1901
1902
1903 (% style="color:blue" %)**For LT-22222-L**(%%):
1904 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.
1905 )))
1906
1907 [[image:image-20220524103407-12.png]]
1908
1909 [[image:image-20220524103429-13.png]]
1910
1911 [[image:image-20220524104033-15.png]]
1912
1913
1914 (% 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:
1915
1916 [[image:1653360054704-518.png||height="186" width="745"]]
1917
1918
1919 (((
1920 (((
1921
1922
1923 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1924 )))
1925 )))
1926
1927 (((
1928 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1929 )))
1930
1931 (((
1932
1933
1934 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1935 )))
1936
1937 (((
1938 (((
1939 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1940 )))
1941 )))
1942
1943 (((
1944 (((
1945 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1946
1947
1948 )))
1949 )))
1950
1951 (((
1952 (% 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.
1953 )))
1954
1955 (((
1956 [[image:1653360231087-571.png||height="401" width="727"]]
1957 )))
1958
1959 (((
1960 (% 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.
1961 )))
1962
1963
1964 (((
1965 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1966 )))
1967
1968 (((
1969 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1970 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1971 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1972 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1973 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1974 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1975 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1976 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1977 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1978 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1979 )))
1980
1981
1982 (((
1983 As shown in below:
1984 )))
1985
1986 [[image:1653360498588-932.png||height="485" width="726"]]
1987
1988
1989 == 5.4 Can I see counting event in Serial? ==
1990
1991 (((
1992 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.
1993
1994
1995 == 5.5 Can i use point to point communication for LT-22222-L? ==
1996
1997 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1998 )))
1999
2000 (((
2001
2002
2003 = 6. Trouble Shooting =
2004 )))
2005
2006 (((
2007 (((
2008 == 6.1 Downlink doesn’t work, how to solve it? ==
2009 )))
2010 )))
2011
2012 (((
2013 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2014 )))
2015
2016 (((
2017
2018
2019 == 6.2 Have trouble to upload image. ==
2020 )))
2021
2022 (((
2023 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2024 )))
2025
2026 (((
2027
2028
2029 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2030 )))
2031
2032 (((
2033 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2034 )))
2035
2036
2037
2038 = 7. Order Info =
2039
2040
2041 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2042
2043
2044 (% style="color:#4f81bd" %)**XXX:**
2045
2046 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2047 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2048 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2049 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2050 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2051 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2052 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2053 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2054 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2055
2056 = 8. Packing Info =
2057
2058
2059 **Package Includes**:
2060
2061 * LT-22222-L I/O Controller x 1
2062 * Stick Antenna for LoRa RF part x 1
2063 * Bracket for controller x1
2064 * Program cable x 1
2065
2066 **Dimension and weight**:
2067
2068 * Device Size: 13.5 x 7 x 3 cm
2069 * Device Weight: 105g
2070 * Package Size / pcs : 14.5 x 8 x 5 cm
2071 * Weight / pcs : 170g
2072
2073 = 9. Support =
2074
2075 * (((
2076 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.
2077 )))
2078 * (((
2079 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]]
2080 )))
2081
2082 = 10. Reference​​​​​ =
2083
2084 * 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]]
2085 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2086 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2087 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]