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Version 77.80 by Xiaoling on 2022/06/10 09:25
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14
15
16
17 = 1.Introduction =
18
19 == 1.1 What is LT Series I/O Controller ==
20
21 (((
22 The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
23 )))
24
25 (((
26 The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
27 )))
28
29 (((
30 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
31 )))
32
33 (((
34 The use environment includes:
35 )))
36
37 (((
38 1) If user’s area has LoRaWAN service coverage, they can just install the I/O controller and configure it to connect the LoRaWAN provider via wireless.
39 )))
40
41 (((
42 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
43 )))
44
45 (((
46 [[image:1653295757274-912.png]]
47
48
49 )))
50
51 == 1.2  Specifications ==
52
53 (((
54
55
56 **Hardware System:**
57 )))
58
59 * (((
60 STM32L072CZT6 MCU
61 )))
62 * (((
63 SX1276/78 Wireless Chip 
64 )))
65 * (((
66 (((
67 Power Consumption:
68 )))
69
70 * (((
71 Idle: 4mA@12v
72 )))
73 * (((
74 20dB Transmit: 34mA@12v
75 )))
76 )))
77
78 (((
79 **Interface for Model: LT22222-L:**
80 )))
81
82 * (((
83 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
84 )))
85 * (((
86 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
87 )))
88 * (((
89 2 x Relay Output (5A@250VAC / 30VDC)
90 )))
91 * (((
92 2 x 0~~20mA Analog Input (res:0.01mA)
93 )))
94 * (((
95 2 x 0~~30V Analog Input (res:0.01v)
96 )))
97 * (((
98 Power Input 7~~ 24V DC. 
99 )))
100
101 (((
102 **LoRa Spec:**
103 )))
104
105 * (((
106 (((
107 Frequency Range:
108 )))
109
110 * (((
111 Band 1 (HF): 862 ~~ 1020 Mhz
112 )))
113 * (((
114 Band 2 (LF): 410 ~~ 528 Mhz
115 )))
116 )))
117 * (((
118 168 dB maximum link budget.
119 )))
120 * (((
121 +20 dBm - 100 mW constant RF output vs.
122 )))
123 * (((
124 +14 dBm high efficiency PA.
125 )))
126 * (((
127 Programmable bit rate up to 300 kbps.
128 )))
129 * (((
130 High sensitivity: down to -148 dBm.
131 )))
132 * (((
133 Bullet-proof front end: IIP3 = -12.5 dBm.
134 )))
135 * (((
136 Excellent blocking immunity.
137 )))
138 * (((
139 Low RX current of 10.3 mA, 200 nA register retention.
140 )))
141 * (((
142 Fully integrated synthesizer with a resolution of 61 Hz.
143 )))
144 * (((
145 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
146 )))
147 * (((
148 Built-in bit synchronizer for clock recovery.
149 )))
150 * (((
151 Preamble detection.
152 )))
153 * (((
154 127 dB Dynamic Range RSSI.
155 )))
156 * (((
157 Automatic RF Sense and CAD with ultra-fast AFC.
158 )))
159 * (((
160 Packet engine up to 256 bytes with CRC.
161
162
163 )))
164
165 == 1.3 Features ==
166
167 * LoRaWAN Class A & Class C protocol
168 * Optional Customized LoRa Protocol
169 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
170 * AT Commands to change parameters
171 * Remote configure parameters via LoRa Downlink
172 * Firmware upgradable via program port
173 * Counting
174
175 == 1.4  Applications ==
176
177 * Smart Buildings & Home Automation
178 * Logistics and Supply Chain Management
179 * Smart Metering
180 * Smart Agriculture
181 * Smart Cities
182 * Smart Factory
183
184 == 1.5 Hardware Variants ==
185
186 (% border="1" style="background-color:#f7faff; width:500px" %)
187 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
188 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
189 * 2 x Digital Input (Bi-direction)
190 * 2 x Digital Output
191 * 2 x Relay Output (5A@250VAC / 30VDC)
192 * 2 x 0~~20mA Analog Input (res:0.01mA)
193 * 2 x 0~~30V Analog Input (res:0.01v)
194 * 1 x Counting Port
195 )))
196
197 = 2. Power ON Device =
198
199 The LT controller can be powered by 7 ~~ 24V DC power source. Connect VIN to Power Input V+ and GND to power input V- to power the LT controller.
200
201 (((
202 PWR will on when device is properly powered.
203 )))
204
205 [[image:1653297104069-180.png]]
206
207
208
209 = 3. Operation Mode =
210
211 == 3.1 How it works? ==
212
213 (((
214 The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on **TX LED** will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. **TX LED** will be on for 5 seconds after joined in network. When there is message from server, the **RX LED** will be on for 1 second. 
215 )))
216
217 (((
218 In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>||anchor="H4.UseATCommand"]] to set the keys in the devices.
219
220
221 )))
222
223
224
225 == 3.2 Example to join LoRaWAN network ==
226
227 (((
228 This chapter shows an example for how to join the TTN LoRaWAN Network. Below is the network structure, we use our LG308 as LoRaWAN gateway here. 
229 )))
230
231 [[image:image-20220523172350-1.png||height="266" width="864"]]
232
233 (((
234 The LG308 is already set to connect to [[TTN network >>url:https://www.thethingsnetwork.org/]]. So what we need to do now is only configure register this device to TTN:
235 )))
236
237 (((
238 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
239 )))
240
241 (((
242 Each LT is shipped with a sticker with the default device EUI as below:
243 )))
244
245 [[image:1653297924498-393.png]]
246
247 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
248
249 Add APP EUI in the application.
250
251 [[image:1653297955910-247.png||height="321" width="716"]]
252
253
254 Add APP KEY and DEV EUI
255
256 [[image:1653298023685-319.png]]
257
258
259 (((
260 **Step 2**: Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.
261 )))
262
263 [[image:1653298044601-602.png||height="405" width="709"]]
264
265
266
267 == 3.3 Uplink Payload ==
268
269 There are five working modes + one interrupt mode on LT for different type application:
270
271 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
272 * **MOD2**: Double DI Counting + DO + RO
273 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
274 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
275 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
276 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
277
278 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
279
280 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
281
282 [[image:image-20220523174024-3.png]]
283
284 (((
285 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
286 )))
287
288 [[image:image-20220523174254-4.png]]
289
290 * RO is for relay. ROx=1 : close，ROx=0 always open.
291 * DI is for digital input. DIx=1: high or float, DIx=0: low.
292 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
293
294 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
295
296 For example if payload is: [[image:image-20220523175847-2.png]]
297
298 **The value for the interface is:  **
299
300 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
301
302 AVI2 channel voltage is 0x04AC/1000=1.196V
303
304 ACI1 channel current is 0x1310/1000=4.880mA
305
306 ACI2 channel current is 0x1300/1000=4.864mA
307
308 The last byte 0xAA= 10101010(B) means
309
310 * [1] RO1 relay channel is close and the RO1 LED is ON.
311 * [0] RO2 relay channel is open and RO2 LED is OFF;
312
313 **LT22222-L:**
314
315 * [1] DI2 channel is high input and DI2 LED is ON;
316 * [0] DI1 channel is low input;
317
318 * [0] DO3 channel output state
319 ** DO3 is float in case no load between DO3 and V+.;
320 ** DO3 is high in case there is load between DO3 and V+.
321 ** DO3 LED is off in both case
322 * [1] DO2 channel output is low and DO2 LED is ON.
323 * [0] DO1 channel output state
324 ** DO1 is float in case no load between DO1 and V+.;
325 ** DO1 is high in case there is load between DO1 and V+.
326 ** DO1 LED is off in both case
327
328 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
329
330 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
331
332 (((
333 Total : 11 bytes payload
334 )))
335
336 [[image:image-20220523180452-3.png]]
337
338 (((
339 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
340 )))
341
342 [[image:image-20220523180506-4.png]]
343
344 * RO is for relay. ROx=1 : close，ROx=0 always open.
345 * FIRST: Indicate this is the first packet after join network.
346 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
347
348 (((
349 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
350 )))
351
352 (((
353 **To use counting mode, please run:**
354 )))
355
356 (% class="box infomessage" %)
357 (((
358 (((
359 **AT+MOD=2**
360 )))
361 )))
362
363 (% class="box infomessage" %)
364 (((
365 (((
366 **ATZ**
367 )))
368 )))
369
370 (((
371 (% style="color:#4f81bd" %)**AT Commands for counting:**
372 )))
373
374 (((
375 **For LT22222-L:**
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
382 )))
383 )))
384
385 (% class="box infomessage" %)
386 (((
387 (((
388 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
389 )))
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
396 )))
397 )))
398
399 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
403 )))
404 )))
405
406 (% class="box infomessage" %)
407 (((
408 (((
409 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
410 )))
411 )))
412
413 (% class="box infomessage" %)
414 (((
415 (((
416 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
417 )))
418 )))
419
420
421
422 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
423
424 **LT22222-L**: This mode the DI1 is used as a counting pin.
425
426 [[image:image-20220523181246-5.png]]
427
428 (((
429 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
430 )))
431
432 [[image:image-20220523181301-6.png]]
433
434 * RO is for relay. ROx=1 : close，ROx=0 always open.
435 * FIRST: Indicate this is the first packet after join network.
436 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
437
438 (((
439 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
440 )))
441
442 (((
443 **To use counting mode, please run:**
444 )))
445
446 (% class="box infomessage" %)
447 (((
448 (((
449 **AT+MOD=3**
450 )))
451 )))
452
453 (% class="box infomessage" %)
454 (((
455 (((
456 **ATZ**
457 )))
458 )))
459
460 (((
461 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
462
463
464 )))
465
466
467
468 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
469
470 **LT22222-L**: This mode the DI1 is used as a counting pin.
471
472 The AVI1 is also used for counting. AVI1 is used to monitor the voltage. It will check the voltage **every 60s**, if voltage is higher or lower than VOLMAX mV, the AVI1 Counting increase 1, so AVI1 counting can be used to measure a machine working hour.
473
474 [[image:image-20220523181903-8.png]]
475
476 (((
477 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
478 )))
479
480 [[image:image-20220523181727-7.png]]
481
482 * RO is for relay. ROx=1 : close，ROx=0 always open.
483 * FIRST: Indicate this is the first packet after join network.
484 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
485
486 (((
487 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
488 )))
489
490 (((
491
492
493 **To use this mode, please run:**
494 )))
495
496 (% class="box infomessage" %)
497 (((
498 (((
499 **AT+MOD=4**
500 )))
501 )))
502
503 (% class="box infomessage" %)
504 (((
505 (((
506 **ATZ**
507 )))
508 )))
509
510 (((
511
512 )))
513
514 (((
515 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
516 )))
517
518 (((
519
520
521 **Plus below command for AVI1 Counting:**
522 )))
523
524 (% class="box infomessage" %)
525 (((
526 (((
527 **AT+SETCNT=3,60   (set AVI Count to 60)**
528 )))
529 )))
530
531 (% class="box infomessage" %)
532 (((
533 (((
534 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
535 )))
536 )))
537
538 (% class="box infomessage" %)
539 (((
540 (((
541 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
542 )))
543 )))
544
545 (% class="box infomessage" %)
546 (((
547 (((
548 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
549 )))
550 )))
551
552
553
554 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
555
556 **LT22222-L**: This mode the DI1 is used as a counting pin.
557
558 [[image:image-20220523182334-9.png]]
559
560 (((
561
562
563 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
564 )))
565
566 * RO is for relay. ROx=1 : close，ROx=0 always open.
567 * FIRST: Indicate this is the first packet after join network.
568 * (((
569 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
570 )))
571
572 (((
573 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
574 )))
575
576 (((
577
578
579 **To use this mode, please run:**
580 )))
581
582 (% class="box infomessage" %)
583 (((
584 (((
585 **AT+MOD=5**
586 )))
587 )))
588
589 (% class="box infomessage" %)
590 (((
591 (((
592 **ATZ**
593 )))
594 )))
595
596 (((
597 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
598 )))
599
600
601
602 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
603
604 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
605
606 For example, if user has configured below commands:
607
608 * **AT+MOD=1 ** **~-~->** The normal working mode
609 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
610
611
612 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
613
614 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
615 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.**
616
617
618 **AT Command to set Trigger Condition**:
619
620 (% style="color:#4f81bd" %)**Trigger base on voltage**:
621
622 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
623
624 **Example:**
625
626 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)
627
628 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
629
630
631 (% style="color:#4f81bd" %)**Trigger base on current**:
632
633 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
634
635 **Example:**
636
637 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
638
639
640 (% style="color:#4f81bd" %)**Trigger base on DI status**:
641
642 DI status trigger Flag.
643
644 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
645
646 **Example:**
647
648 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
649
650
651 **Downlink Command to set Trigger Condition**
652
653 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
654
655 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
656
657 AA: Code for this downlink Command:
658
659 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
660
661 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
662
663 yy2 yy2: AC1 or AV1 high limit.
664
665 yy3 yy3: AC2 or AV2 low limit.
666
667 Yy4 yy4: AC2 or AV2 high limit.
668
669
670 **Example1**: AA 00 13 88 00 00 00 00 00 00
671
672 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
673
674
675 **Example2**: AA 02 01 00
676
677 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
678
679
680 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
681
682 MOD6 Payload : total 11 bytes payload
683
684 [[image:image-20220524085923-1.png]]
685
686
687 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
688
689 [[image:image-20220524090106-2.png]]
690
691 * Each bits shows if the corresponding trigger has been configured.
692
693
694 **Example:**
695
696 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
697
698
699 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
700
701 [[image:image-20220524090249-3.png]]
702
703 * Each bits shows which status has been trigger on this uplink.
704
705
706 **Example:**
707
708 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
709
710
711 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
712
713 [[image:image-20220524090456-4.png]]
714
715 * Each bits shows which status has been trigger on this uplink.
716
717
718 **Example:**
719
720 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
721
722 00000101: Means both DI1 and DI2 trigger are enabled.
723
724
725 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
726
727 Downlink command to poll MOD6 status:
728
729 **AB 06**
730
731 When device got this command, it will send the MOD6 payload.
732
733
734
735 === 3.3.7 Payload Decoder ===
736
737 (((
738 **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/]]
739
740
741 )))
742
743
744
745 == 3.4 ​Configure LT via AT or Downlink ==
746
747 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
748
749 (((
750 There are two kinds of Commands:
751 )))
752
753 * (% 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]]
754
755 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
756
757
758
759 === 3.4.1 Common Commands ===
760
761 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]]
762
763
764
765 === 3.4.2 Sensor related commands ===
766
767 ==== 3.4.2.1 Set Transmit Interval ====
768
769 Set device uplink interval.
770
771 * AT Command:
772
773 (% class="box infomessage" %)
774 (((
775 **AT+TDC=N **
776 )))
777
778 **Example: **AT+TDC=30000. Means set interval to 30 seconds
779
780
781 * Downlink Payload (prefix 0x01):
782
783 (% class="box infomessage" %)
784 (((
785 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
786 )))
787
788
789
790 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
791
792 Set work mode.
793
794 * AT Command:
795
796 (% class="box infomessage" %)
797 (((
798 **AT+MOD=N  **
799 )))
800
801 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
802
803
804 * Downlink Payload (prefix 0x0A):
805
806 (% class="box infomessage" %)
807 (((
808 **0x0A aa     ~/~/ Same as AT+MOD=aa**
809 )))
810
811
812
813 ==== 3.4.2.3 Poll an uplink ====
814
815 * AT Command:
816
817 There is no AT Command to poll uplink
818
819
820 * Downlink Payload (prefix 0x08):
821
822 (% class="box infomessage" %)
823 (((
824 **0x08 FF     ~/~/ Poll an uplink,**
825 )))
826
827 **Example**: 0x08FF, ask device to send an Uplink
828
829
830
831 ==== 3.4.2.4 Enable Trigger Mode ====
832
833 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
834
835 * AT Command:
836
837 (% class="box infomessage" %)
838 (((
839 **AT+ADDMOD6=1 or 0**
840 )))
841
842 1: Enable Trigger Mode
843
844 0: Disable Trigger Mode
845
846
847 * Downlink Payload (prefix 0x0A 06):
848
849 (% class="box infomessage" %)
850 (((
851 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
852 )))
853
854
855
856 ==== 3.4.2.5 Poll trigger settings ====
857
858 Poll trigger settings,
859
860 * AT Command:
861
862 There is no AT Command for this feature.
863
864
865 * Downlink Payload (prefix 0x AB 06):
866
867 (% class="box infomessage" %)
868 (((
869 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
870 )))
871
872
873
874 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
875
876 Enable Disable DI1/DI2/DI2 as trigger,
877
878 * AT Command:
879
880 (% class="box infomessage" %)
881 (((
882 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
883 )))
884
885
886 **Example:**
887
888 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
889
890 * Downlink Payload (prefix 0xAA 02):
891
892 (% class="box infomessage" %)
893 (((
894 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
895 )))
896
897
898
899 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
900
901 Set DI1 or DI3(for LT-33222-L) trigger.
902
903 * AT Command:
904
905 (% class="box infomessage" %)
906 (((
907 **AT+TRIG1=a,b**
908 )))
909
910 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
911
912 b : delay timing.
913
914
915 **Example:**
916
917 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
918
919
920 * Downlink Payload (prefix 0x09 01 ):
921
922 (% class="box infomessage" %)
923 (((
924 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
925 )))
926
927
928
929 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
930
931 Set DI2 trigger.
932
933 * AT Command:
934
935 (% class="box infomessage" %)
936 (((
937 **AT+TRIG2=a,b**
938 )))
939
940 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
941
942 b : delay timing.
943
944
945 **Example:**
946
947 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
948
949
950 * Downlink Payload (prefix 0x09 02 ):
951
952 (% class="box infomessage" %)
953 (((
954 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
955 )))
956
957
958
959 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
960
961 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
962
963 * AT Command:
964
965 (% class="box infomessage" %)
966 (((
967 **AT+ACLIM. **
968 )))
969
970
971 * Downlink Payload (prefix 0xAA 01 ):
972
973 (% class="box infomessage" %)
974 (((
975 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
976 )))
977
978
979
980 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
981
982 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
983
984 * AT Command:
985
986 (% class="box infomessage" %)
987 (((
988 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
989 )))
990
991
992 * Downlink Payload (prefix 0xAA 00 ):
993
994 (% class="box infomessage" %)
995 (((
996 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
997 )))
998
999
1000
1001 ==== 3.4.2.11 Trigger – Set minimum interval ====
1002
1003 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1004
1005 * AT Command:
1006
1007 (% class="box infomessage" %)
1008 (((
1009 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1010 )))
1011
1012
1013 * Downlink Payload (prefix 0xAC ):
1014
1015 (% class="box infomessage" %)
1016 (((
1017 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1018 )))
1019
1020
1021
1022 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1023
1024 * AT Command:
1025
1026 There is no AT Command to control Digital Output
1027
1028
1029 * Downlink Payload (prefix 0x02):
1030
1031 (% class="box infomessage" %)
1032 (((
1033 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1034 )))
1035
1036 (((
1037 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1038 )))
1039
1040 (((
1041 01: Low,  00: High ,  11: No action
1042 )))
1043
1044 [[image:image-20220524092754-5.png]]
1045
1046 (((
1047 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1048 )))
1049
1050 (((
1051 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1052 )))
1053
1054
1055
1056 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1057
1058 * AT Command:
1059
1060 There is no AT Command to control Digital Output
1061
1062
1063 * Downlink Payload (prefix 0xA9):
1064
1065 (% class="box infomessage" %)
1066 (((
1067 (((
1068 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1069 )))
1070 )))
1071
1072 This is to control the digital output time of DO pin. Include four bytes:
1073
1074 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1075
1076 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1077
1078 01: DO pins will change back to original state after timeout.
1079
1080 00: DO pins will change to an inverter state after timeout 
1081
1082
1083 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1084
1085 [[image:image-20220524093238-6.png]]
1086
1087
1088 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1089
1090 [[image:image-20220524093328-7.png]]
1091
1092
1093 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1094
1095 [[image:image-20220524093351-8.png]]
1096
1097
1098 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1099
1100 Latching time. Unit: ms
1101
1102 Device will upload a packet if downlink code executes successfully.
1103
1104
1105 **Example payload:**
1106
1107 **~1. A9 01 01 01 01 07 D0**
1108
1109 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1110
1111 **2. A9 01 00 01 11 07 D0**
1112
1113 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1114
1115 **3. A9 00 00 00 00 07 D0**
1116
1117 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1118
1119 **4. A9 00 11 01 00 07 D0**
1120
1121 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
1122
1123
1124
1125 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1126
1127 * AT Command:
1128
1129 There is no AT Command to control Relay Output
1130
1131
1132 * Downlink Payload (prefix 0x03):
1133
1134 (% class="box infomessage" %)
1135 (((
1136 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1137 )))
1138
1139 (((
1140 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1141 )))
1142
1143 (((
1144 01: Close ,  00: Open , 11: No action
1145 )))
1146
1147 (((
1148 [[image:image-20220524093724-9.png]]
1149 )))
1150
1151 Device will upload a packet if downlink code executes successfully.
1152
1153
1154
1155 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1156
1157 * AT Command:
1158
1159 There is no AT Command to control Relay Output
1160
1161
1162 * Downlink Payload (prefix 0x05):
1163
1164 (% class="box infomessage" %)
1165 (((
1166 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1167 )))
1168
1169 This is to control the relay output time of relay. Include four bytes:
1170
1171 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1172
1173 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1174
1175 01: Relays will change back to original state after timeout.
1176
1177 00: Relays will change to an inverter state after timeout
1178
1179
1180 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1181
1182 [[image:image-20220524093831-10.png]]
1183
1184
1185 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1186
1187 Device will upload a packet if downlink code executes successfully.
1188
1189
1190 **Example payload:**
1191
1192 **~1. 05 01 11 07 D0**
1193
1194 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1195
1196 **2. 05 01 10 07 D0**
1197
1198 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1199
1200 **3. 05 00 01 07 D0**
1201
1202 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1203
1204 **4. 05 00 00 07 D0**
1205
1206 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1207
1208
1209
1210 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1211
1212 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1213
1214 * AT Command:
1215
1216 (% class="box infomessage" %)
1217 (((
1218 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1219 )))
1220
1221
1222 * Downlink Payload (prefix 0xA5):
1223
1224 (% class="box infomessage" %)
1225 (((
1226 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1227 )))
1228
1229
1230
1231 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1232
1233 * AT Command:
1234
1235 (% class="box infomessage" %)
1236 (((
1237 **AT+SETCNT=aa,(bb cc dd ee) **
1238 )))
1239
1240 aa: 1: Set count1,
1241
1242 2: Set count2,
1243
1244 3: Set AV1 count
1245
1246 Bb cc dd ee: number to be set
1247
1248
1249 * Downlink Payload (prefix 0xA8):
1250
1251 (% class="box infomessage" %)
1252 (((
1253 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1254 )))
1255
1256
1257
1258 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1259
1260 Clear counting for counting mode
1261
1262 * AT Command:
1263
1264 (% class="box infomessage" %)
1265 (((
1266 **AT+CLRCOUNT ~/~/ clear all counting**
1267 )))
1268
1269 * Downlink Payload (prefix 0xA6):
1270
1271 (% class="box infomessage" %)
1272 (((
1273 **0x A6 01     ~/~/ clear all counting,**
1274 )))
1275
1276
1277
1278 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1279
1280 * AT Command:
1281
1282 (% class="box infomessage" %)
1283 (((
1284 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1285 )))
1286
1287 * Downlink Payload (prefix 0xA7):
1288
1289 (% class="box infomessage" %)
1290 (((
1291 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1292 )))
1293
1294 (((
1295 range: aa bb cc:0 to 16777215,  (unit:second)
1296
1297
1298 )))
1299
1300
1301 == 3.5 Integrate with Mydevice ==
1302
1303 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:
1304
1305 (((
1306 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1307 )))
1308
1309 (((
1310 (% 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:
1311 )))
1312
1313 [[image:1653356737703-362.png||height="232" width="732"]]
1314
1315 [[image:image-20220524094641-11.png||height="390" width="723"]]
1316
1317
1318 [[image:image-20220524094641-12.png||height="402" width="718"]]
1319
1320
1321 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1322
1323 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1324
1325 Search under The things network
1326
1327 [[image:1653356838789-523.png||height="337" width="740"]]
1328
1329
1330
1331 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1332
1333 [[image:image-20220524094909-1.png||height="335" width="729"]]
1334
1335
1336 [[image:image-20220524094909-2.png||height="337" width="729"]]
1337
1338
1339 [[image:image-20220524094909-3.png||height="338" width="727"]]
1340
1341
1342 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1343
1344
1345 [[image:image-20220524094909-5.png||height="341" width="734"]]
1346
1347
1348
1349 == 3.6 Interface Detail ==
1350
1351 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1352
1353 Support NPN Type sensor
1354
1355 [[image:1653356991268-289.png]]
1356
1357
1358
1359 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1360
1361 (((
1362 The DI port of LT-22222-L can support NPN or PNP output sensor.
1363 )))
1364
1365 (((
1366 (((
1367 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
1368 )))
1369 )))
1370
1371 [[image:1653357170703-587.png]]
1372
1373 (((
1374 (((
1375 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1376 )))
1377 )))
1378
1379 (((
1380
1381 )))
1382
1383 (((
1384 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1385 )))
1386
1387 (((
1388 This type of sensor will output a low signal GND when active.
1389 )))
1390
1391 * (((
1392 Connect sensor’s output to DI1-
1393 )))
1394 * (((
1395 Connect sensor’s VCC to DI1+.
1396 )))
1397
1398 (((
1399 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1400 )))
1401
1402 (((
1403 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1404 )))
1405
1406 (((
1407 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.
1408 )))
1409
1410 (((
1411
1412 )))
1413
1414 (((
1415 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1416 )))
1417
1418 (((
1419 This type of sensor will output a high signal (example 24v) when active.
1420 )))
1421
1422 * (((
1423 Connect sensor’s output to DI1+
1424 )))
1425 * (((
1426 Connect sensor’s GND DI1-.
1427 )))
1428
1429 (((
1430 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1431 )))
1432
1433 (((
1434 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1435 )))
1436
1437 (((
1438 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.
1439 )))
1440
1441 (((
1442
1443 )))
1444
1445 (((
1446 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1447 )))
1448
1449 (((
1450 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1451 )))
1452
1453 * (((
1454 Connect sensor’s output to DI1+ with a serial 50K resistor
1455 )))
1456 * (((
1457 Connect sensor’s GND DI1-.
1458 )))
1459
1460 (((
1461 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1462 )))
1463
1464 (((
1465 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1466 )))
1467
1468 (((
1469 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.
1470 )))
1471
1472
1473
1474 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1475
1476 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1477
1478 [[image:1653357531600-905.png]]
1479
1480
1481
1482 === 3.6.4 Analog Input Interface ===
1483
1484 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:
1485
1486
1487 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1488
1489 [[image:1653357592296-182.png]]
1490
1491 Example to connect a 4~~20mA sensor
1492
1493 We take the wind speed sensor as an example for reference only.
1494
1495
1496 **Specifications of the wind speed sensor:**
1497
1498 Red:  12~~24v
1499
1500 Yellow:  4~~20mA
1501
1502 Black:  GND
1503
1504
1505 **Connection diagram:**
1506
1507 [[image:1653357640609-758.png]]
1508
1509 [[image:1653357648330-671.png||height="155" width="733"]]
1510
1511
1512
1513 === 3.6.5 Relay Output ===
1514
1515 (((
1516 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:
1517 )))
1518
1519 [[image:image-20220524100215-9.png]]
1520
1521 [[image:image-20220524100215-10.png||height="382" width="723"]]
1522
1523
1524
1525 == 3.7 LEDs Indicators ==
1526
1527 [[image:image-20220524100748-11.png]]
1528
1529
1530 = 4. Use AT Command =
1531
1532 == 4.1 Access AT Command ==
1533
1534 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.
1535
1536 [[image:1653358238933-385.png]]
1537
1538
1539 (((
1540 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:
1541 )))
1542
1543 [[image:1653358355238-883.png]]
1544
1545
1546 (((
1547 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/]]
1548 )))
1549
1550 (((
1551 AT+<CMD>?        : Help on <CMD>
1552 )))
1553
1554 (((
1555 AT+<CMD>         : Run <CMD>
1556 )))
1557
1558 (((
1559 AT+<CMD>=<value> : Set the value
1560 )))
1561
1562 (((
1563 AT+<CMD>=?       : Get the value
1564 )))
1565
1566 (((
1567 ATZ: Trig a reset of the MCU
1568 )))
1569
1570 (((
1571 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1572 )))
1573
1574 (((
1575 AT+DEUI: Get or Set the Device EUI
1576 )))
1577
1578 (((
1579 AT+DADDR: Get or Set the Device Address
1580 )))
1581
1582 (((
1583 AT+APPKEY: Get or Set the Application Key
1584 )))
1585
1586 (((
1587 AT+NWKSKEY: Get or Set the Network Session Key
1588 )))
1589
1590 (((
1591 AT+APPSKEY: Get or Set the Application Session Key
1592 )))
1593
1594 (((
1595 AT+APPEUI: Get or Set the Application EUI
1596 )))
1597
1598 (((
1599 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1600 )))
1601
1602 (((
1603 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1604 )))
1605
1606 (((
1607 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1608 )))
1609
1610 (((
1611 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1612 )))
1613
1614 (((
1615 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1616 )))
1617
1618 (((
1619 AT+RX2FQ: Get or Set the Rx2 window frequency
1620 )))
1621
1622 (((
1623 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1624 )))
1625
1626 (((
1627 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1628 )))
1629
1630 (((
1631 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1632 )))
1633
1634 (((
1635 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1636 )))
1637
1638 (((
1639 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1640 )))
1641
1642 (((
1643 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1644 )))
1645
1646 (((
1647 AT+NWKID: Get or Set the Network ID
1648 )))
1649
1650 (((
1651 AT+FCU: Get or Set the Frame Counter Uplink
1652 )))
1653
1654 (((
1655 AT+FCD: Get or Set the Frame Counter Downlink
1656 )))
1657
1658 (((
1659 AT+CLASS: Get or Set the Device Class
1660 )))
1661
1662 (((
1663 AT+JOIN: Join network
1664 )))
1665
1666 (((
1667 AT+NJS: Get OTAA Join Status
1668 )))
1669
1670 (((
1671 AT+SENDB: Send hexadecimal data along with the application port
1672 )))
1673
1674 (((
1675 AT+SEND: Send text data along with the application port
1676 )))
1677
1678 (((
1679 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1680 )))
1681
1682 (((
1683 AT+RECV: Print last received data in raw format
1684 )))
1685
1686 (((
1687 AT+VER: Get current image version and Frequency Band
1688 )))
1689
1690 (((
1691 AT+CFM: Get or Set the confirmation mode (0-1)
1692 )))
1693
1694 (((
1695 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1696 )))
1697
1698 (((
1699 AT+SNR: Get the SNR of the last received packet
1700 )))
1701
1702 (((
1703 AT+RSSI: Get the RSSI of the last received packet
1704 )))
1705
1706 (((
1707 AT+TDC: Get or set the application data transmission interval in ms
1708 )))
1709
1710 (((
1711 AT+PORT: Get or set the application port
1712 )))
1713
1714 (((
1715 AT+DISAT: Disable AT commands
1716 )))
1717
1718 (((
1719 AT+PWORD: Set password, max 9 digits
1720 )))
1721
1722 (((
1723 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1724 )))
1725
1726 (((
1727 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1728 )))
1729
1730 (((
1731 AT+CFG: Print all settings
1732
1733
1734 )))
1735
1736
1737
1738 == 4.2 Common AT Command Sequence ==
1739
1740 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1741
1742 (((
1743
1744
1745 **If device has not joined network yet:**
1746 )))
1747
1748 (((
1749 (% style="background-color:#dcdcdc" %)123456
1750 )))
1751
1752 (((
1753 (% style="background-color:#dcdcdc" %)AT+FDR
1754 )))
1755
1756 (((
1757 (% style="background-color:#dcdcdc" %)123456
1758 )))
1759
1760 (((
1761 (% style="background-color:#dcdcdc" %)AT+NJM=0
1762 )))
1763
1764 (((
1765 (% style="background-color:#dcdcdc" %)ATZ
1766 )))
1767
1768
1769 (((
1770 **If device already joined network:**
1771 )))
1772
1773 (((
1774 (% style="background-color:#dcdcdc" %)AT+NJM=0
1775 )))
1776
1777 (((
1778 (% style="background-color:#dcdcdc" %)ATZ
1779
1780
1781 )))
1782
1783
1784
1785 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1786
1787 (((
1788
1789
1790 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1791 )))
1792
1793 (((
1794 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1795 )))
1796
1797 (((
1798 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1799 )))
1800
1801 (((
1802 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1803 )))
1804
1805 (((
1806 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1807 )))
1808
1809 (((
1810 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1811 )))
1812
1813 (((
1814 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1815 )))
1816
1817 (((
1818 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1819 )))
1820
1821 (((
1822 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1823 )))
1824
1825 (((
1826 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1827 )))
1828
1829 (((
1830 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1831 )))
1832
1833 (((
1834 (% 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.
1835 )))
1836
1837 (((
1838 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1839
1840
1841 )))
1842
1843 (((
1844 (% style="color:red" %)**Note:**
1845 )))
1846
1847 (((
1848 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1849 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1850 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.
1851 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
1852 )))
1853
1854 (((
1855 [[image:1653359097980-169.png||height="188" width="729"]]
1856 )))
1857
1858 (((
1859
1860 )))
1861
1862
1863 === 4.2.3 Change to Class A ===
1864
1865 If sensor JOINED
1866 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1867 ATZ
1868
1869
1870 = 5. FAQ =
1871
1872 == 5.1 How to upgrade the image? ==
1873
1874
1875 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1876
1877 * Support new features
1878 * For bug fix
1879 * Change LoRaWAN bands.
1880
1881 Below shows the hardware connection for how to upload an image to the LT:
1882
1883 [[image:1653359603330-121.png]]
1884
1885
1886 (((
1887 (% 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]].
1888 (% 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/]].
1889 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1890
1891
1892 (% style="color:blue" %)**For LT-22222-L**(%%):
1893 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.
1894 )))
1895
1896 [[image:image-20220524103407-12.png]]
1897
1898 [[image:image-20220524103429-13.png]]
1899
1900 [[image:image-20220524104033-15.png]]
1901
1902
1903 (% 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:
1904
1905 [[image:1653360054704-518.png||height="186" width="745"]]
1906
1907
1908 (((
1909 (((
1910
1911
1912 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1913 )))
1914 )))
1915
1916 (((
1917 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1918 )))
1919
1920 (((
1921
1922
1923 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1924 )))
1925
1926 (((
1927 (((
1928 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1929 )))
1930 )))
1931
1932 (((
1933 (((
1934 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1935
1936
1937 )))
1938 )))
1939
1940 (((
1941 (% 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.
1942 )))
1943
1944 (((
1945 [[image:1653360231087-571.png||height="401" width="727"]]
1946 )))
1947
1948 (((
1949 (% 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.
1950 )))
1951
1952
1953 (((
1954 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1955 )))
1956
1957 (((
1958 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1959 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1960 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1961 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1962 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1963 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1964 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1965 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1966 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1967 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1968 )))
1969
1970
1971 (((
1972 As shown in below:
1973 )))
1974
1975 [[image:1653360498588-932.png||height="485" width="726"]]
1976
1977
1978 == 5.4 Can I see counting event in Serial? ==
1979
1980 (((
1981 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.
1982
1983
1984 == 5.5 Can i use point to point communication for LT-22222-L? ==
1985
1986 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1987 )))
1988
1989 (((
1990
1991
1992 = 6. Trouble Shooting =
1993 )))
1994
1995 (((
1996 (((
1997 == 6.1 Downlink doesn’t work, how to solve it? ==
1998 )))
1999 )))
2000
2001 (((
2002 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2003 )))
2004
2005 (((
2006
2007
2008 == 6.2 Have trouble to upload image. ==
2009 )))
2010
2011 (((
2012 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2013 )))
2014
2015 (((
2016
2017
2018 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2019 )))
2020
2021 (((
2022 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2023 )))
2024
2025
2026
2027 = 7. Order Info =
2028
2029
2030 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2031
2032
2033 (% style="color:#4f81bd" %)**XXX:**
2034
2035 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2036 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2037 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2038 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2039 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2040 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2041 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2042 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2043 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2044
2045 = 8. Packing Info =
2046
2047
2048 **Package Includes**:
2049
2050 * LT-22222-L I/O Controller x 1
2051 * Stick Antenna for LoRa RF part x 1
2052 * Bracket for controller x1
2053 * Program cable x 1
2054
2055 **Dimension and weight**:
2056
2057 * Device Size: 13.5 x 7 x 3 cm
2058 * Device Weight: 105g
2059 * Package Size / pcs : 14.5 x 8 x 5 cm
2060 * Weight / pcs : 170g
2061
2062 = 9. Support =
2063
2064 * (((
2065 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.
2066 )))
2067 * (((
2068 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]]
2069 )))
2070
2071 = 10. Reference​​​​​ =
2072
2073 * 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]]
2074 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2075 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2076 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]