Version 77.66 by Xiaoling on 2022/06/10 09:19
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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 **To use this mode, please run:**
492 )))
493
494 (% class="box infomessage" %)
495 (((
496 (((
497 **AT+MOD=4**
498 )))
499 )))
500
501 (% class="box infomessage" %)
502 (((
503 (((
504 **ATZ**
505 )))
506 )))
507
508 (((
509
510 )))
511
512 (((
513 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
514 )))
515
516 (((
517 **Plus below command for AVI1 Counting:**
518 )))
519
520 (% class="box infomessage" %)
521 (((
522 (((
523 **AT+SETCNT=3,60   (set AVI Count to 60)**
524 )))
525 )))
526
527 (% class="box infomessage" %)
528 (((
529 (((
530 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
531 )))
532 )))
533
534 (% class="box infomessage" %)
535 (((
536 (((
537 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
538 )))
539 )))
540
541 (% class="box infomessage" %)
542 (((
543 (((
544 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
545 )))
546 )))
547
548
549
550 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
551
552 **LT22222-L**: This mode the DI1 is used as a counting pin.
553
554 [[image:image-20220523182334-9.png]]
555
556 (((
557 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
558 )))
559
560 * RO is for relay. ROx=1 : close，ROx=0 always open.
561 * FIRST: Indicate this is the first packet after join network.
562 * (((
563 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
564 )))
565
566 (((
567 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
568 )))
569
570 (((
571 **To use this mode, please run:**
572 )))
573
574 (% class="box infomessage" %)
575 (((
576 (((
577 **AT+MOD=5**
578 )))
579 )))
580
581 (% class="box infomessage" %)
582 (((
583 (((
584 **ATZ**
585 )))
586 )))
587
588 (((
589 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
590
591
592 )))
593
594
595
596 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
597
598 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
599
600 For example, if user has configured below commands:
601
602 * **AT+MOD=1 ** **~-~->** The normal working mode
603 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
604
605 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
606
607 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
608 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.**
609
610 **AT Command to set Trigger Condition**:
611
612 (% style="color:#4f81bd" %)**Trigger base on voltage**:
613
614 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
615
616 **Example:**
617
618 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)
619
620 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
621
622
623 (% style="color:#4f81bd" %)**Trigger base on current**:
624
625 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
626
627 **Example:**
628
629 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
630
631
632 (% style="color:#4f81bd" %)**Trigger base on DI status**:
633
634 DI status trigger Flag.
635
636 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
637
638 **Example:**
639
640 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
641
642
643 **Downlink Command to set Trigger Condition**
644
645 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
646
647 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
648
649 AA: Code for this downlink Command:
650
651 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
652
653 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
654
655 yy2 yy2: AC1 or AV1 high limit.
656
657 yy3 yy3: AC2 or AV2 low limit.
658
659 Yy4 yy4: AC2 or AV2 high limit.
660
661 **Example1**: AA 00 13 88 00 00 00 00 00 00
662
663 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
664
665 **Example2**: AA 02 01 00
666
667 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
668
669 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
670
671 MOD6 Payload : total 11 bytes payload
672
673 [[image:image-20220524085923-1.png]]
674
675 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
676
677 [[image:image-20220524090106-2.png]]
678
679 * Each bits shows if the corresponding trigger has been configured.
680
681 **Example:**
682
683 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
684
685
686 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
687
688 [[image:image-20220524090249-3.png]]
689
690 * Each bits shows which status has been trigger on this uplink.
691
692 **Example:**
693
694 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
695
696
697 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
698
699 [[image:image-20220524090456-4.png]]
700
701 * Each bits shows which status has been trigger on this uplink.
702
703 **Example:**
704
705 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
706
707 00000101: Means both DI1 and DI2 trigger are enabled.
708
709
710 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
711
712 Downlink command to poll MOD6 status:
713
714 **AB 06**
715
716 When device got this command, it will send the MOD6 payload.
717
718
719
720 === 3.3.7 Payload Decoder ===
721
722 (((
723 **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/]]
724
725
726 )))
727
728
729
730 == 3.4 ​Configure LT via AT or Downlink ==
731
732 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
733
734 (((
735 There are two kinds of Commands:
736 )))
737
738 * (% 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]]
739
740 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
741
742 === 3.4.1 Common Commands ===
743
744 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]]
745
746
747
748 === 3.4.2 Sensor related commands ===
749
750 ==== 3.4.2.1 Set Transmit Interval ====
751
752 Set device uplink interval.
753
754 * AT Command:
755
756 (% class="box infomessage" %)
757 (((
758 **AT+TDC=N **
759 )))
760
761 **Example: **AT+TDC=30000. Means set interval to 30 seconds
762
763
764 * Downlink Payload (prefix 0x01):
765
766 (% class="box infomessage" %)
767 (((
768 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
769 )))
770
771
772
773 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
774
775 Set work mode.
776
777 * AT Command:
778
779 (% class="box infomessage" %)
780 (((
781 **AT+MOD=N  **
782 )))
783
784 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
785
786
787 * Downlink Payload (prefix 0x0A):
788
789 (% class="box infomessage" %)
790 (((
791 **0x0A aa     ~/~/ Same as AT+MOD=aa**
792 )))
793
794
795
796 ==== 3.4.2.3 Poll an uplink ====
797
798 * AT Command:
799
800 There is no AT Command to poll uplink
801
802
803 * Downlink Payload (prefix 0x08):
804
805 (% class="box infomessage" %)
806 (((
807 **0x08 FF     ~/~/ Poll an uplink,**
808 )))
809
810 **Example**: 0x08FF, ask device to send an Uplink
811
812
813
814 ==== 3.4.2.4 Enable Trigger Mode ====
815
816 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
817
818 * AT Command:
819
820 (% class="box infomessage" %)
821 (((
822 **AT+ADDMOD6=1 or 0**
823 )))
824
825 1: Enable Trigger Mode
826
827 0: Disable Trigger Mode
828
829
830 * Downlink Payload (prefix 0x0A 06):
831
832 (% class="box infomessage" %)
833 (((
834 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
835 )))
836
837
838
839 ==== 3.4.2.5 Poll trigger settings ====
840
841 Poll trigger settings,
842
843 * AT Command:
844
845 There is no AT Command for this feature.
846
847
848 * Downlink Payload (prefix 0x AB 06):
849
850 (% class="box infomessage" %)
851 (((
852 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
853 )))
854
855
856
857 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
858
859 Enable Disable DI1/DI2/DI2 as trigger,
860
861 * AT Command:
862
863 (% class="box infomessage" %)
864 (((
865 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
866 )))
867
868
869 **Example:**
870
871 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
872
873 * Downlink Payload (prefix 0xAA 02):
874
875 (% class="box infomessage" %)
876 (((
877 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
878 )))
879
880
881
882 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
883
884 Set DI1 or DI3(for LT-33222-L) trigger.
885
886 * AT Command:
887
888 (% class="box infomessage" %)
889 (((
890 **AT+TRIG1=a,b**
891 )))
892
893 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
894
895 b : delay timing.
896
897
898 **Example:**
899
900 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
901
902
903 * Downlink Payload (prefix 0x09 01 ):
904
905 (% class="box infomessage" %)
906 (((
907 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
908 )))
909
910
911
912 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
913
914 Set DI2 trigger.
915
916 * AT Command:
917
918 (% class="box infomessage" %)
919 (((
920 **AT+TRIG2=a,b**
921 )))
922
923 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
924
925 b : delay timing.
926
927
928 **Example:**
929
930 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
931
932
933 * Downlink Payload (prefix 0x09 02 ):
934
935 (% class="box infomessage" %)
936 (((
937 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
938 )))
939
940
941
942 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
943
944 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
945
946 * AT Command:
947
948 (% class="box infomessage" %)
949 (((
950 **AT+ACLIM. **
951 )))
952
953
954 * Downlink Payload (prefix 0xAA 01 ):
955
956 (% class="box infomessage" %)
957 (((
958 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
959 )))
960
961
962
963 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
964
965 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
966
967 * AT Command:
968
969 (% class="box infomessage" %)
970 (((
971 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
972 )))
973
974
975 * Downlink Payload (prefix 0xAA 00 ):
976
977 (% class="box infomessage" %)
978 (((
979 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
980 )))
981
982
983
984 ==== 3.4.2.11 Trigger – Set minimum interval ====
985
986 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
987
988 * AT Command:
989
990 (% class="box infomessage" %)
991 (((
992 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
993 )))
994
995
996 * Downlink Payload (prefix 0xAC ):
997
998 (% class="box infomessage" %)
999 (((
1000 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1001 )))
1002
1003
1004
1005 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1006
1007 * AT Command:
1008
1009 There is no AT Command to control Digital Output
1010
1011
1012 * Downlink Payload (prefix 0x02):
1013
1014 (% class="box infomessage" %)
1015 (((
1016 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1017 )))
1018
1019 (((
1020 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1021 )))
1022
1023 (((
1024 01: Low,  00: High ,  11: No action
1025 )))
1026
1027 [[image:image-20220524092754-5.png]]
1028
1029 (((
1030 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1031 )))
1032
1033 (((
1034 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1035 )))
1036
1037
1038
1039 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1040
1041 * AT Command:
1042
1043 There is no AT Command to control Digital Output
1044
1045
1046 * Downlink Payload (prefix 0xA9):
1047
1048 (% class="box infomessage" %)
1049 (((
1050 (((
1051 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1052 )))
1053 )))
1054
1055 This is to control the digital output time of DO pin. Include four bytes:
1056
1057 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1058
1059 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1060
1061 01: DO pins will change back to original state after timeout.
1062
1063 00: DO pins will change to an inverter state after timeout 
1064
1065
1066 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1067
1068 [[image:image-20220524093238-6.png]]
1069
1070
1071 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1072
1073 [[image:image-20220524093328-7.png]]
1074
1075
1076 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1077
1078 [[image:image-20220524093351-8.png]]
1079
1080
1081 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1082
1083 Latching time. Unit: ms
1084
1085 Device will upload a packet if downlink code executes successfully.
1086
1087
1088 **Example payload:**
1089
1090 **~1. A9 01 01 01 01 07 D0**
1091
1092 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1093
1094 **2. A9 01 00 01 11 07 D0**
1095
1096 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1097
1098 **3. A9 00 00 00 00 07 D0**
1099
1100 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1101
1102 **4. A9 00 11 01 00 07 D0**
1103
1104 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
1105
1106
1107
1108 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1109
1110 * AT Command:
1111
1112 There is no AT Command to control Relay Output
1113
1114
1115 * Downlink Payload (prefix 0x03):
1116
1117 (% class="box infomessage" %)
1118 (((
1119 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1120 )))
1121
1122 (((
1123 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1124 )))
1125
1126 (((
1127 01: Close ,  00: Open , 11: No action
1128 )))
1129
1130 (((
1131 [[image:image-20220524093724-9.png]]
1132 )))
1133
1134 Device will upload a packet if downlink code executes successfully.
1135
1136
1137
1138 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1139
1140 * AT Command:
1141
1142 There is no AT Command to control Relay Output
1143
1144
1145 * Downlink Payload (prefix 0x05):
1146
1147 (% class="box infomessage" %)
1148 (((
1149 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1150 )))
1151
1152 This is to control the relay output time of relay. Include four bytes:
1153
1154 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1155
1156 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1157
1158 01: Relays will change back to original state after timeout.
1159
1160 00: Relays will change to an inverter state after timeout
1161
1162
1163 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1164
1165 [[image:image-20220524093831-10.png]]
1166
1167
1168 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1169
1170 Device will upload a packet if downlink code executes successfully.
1171
1172
1173 **Example payload:**
1174
1175 **~1. 05 01 11 07 D0**
1176
1177 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1178
1179 **2. 05 01 10 07 D0**
1180
1181 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1182
1183 **3. 05 00 01 07 D0**
1184
1185 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1186
1187 **4. 05 00 00 07 D0**
1188
1189 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1190
1191
1192
1193 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1194
1195 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1196
1197 * AT Command:
1198
1199 (% class="box infomessage" %)
1200 (((
1201 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1202 )))
1203
1204
1205 * Downlink Payload (prefix 0xA5):
1206
1207 (% class="box infomessage" %)
1208 (((
1209 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1210 )))
1211
1212
1213
1214 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1215
1216 * AT Command:
1217
1218 (% class="box infomessage" %)
1219 (((
1220 **AT+SETCNT=aa,(bb cc dd ee) **
1221 )))
1222
1223 aa: 1: Set count1,
1224
1225 2: Set count2,
1226
1227 3: Set AV1 count
1228
1229 Bb cc dd ee: number to be set
1230
1231
1232 * Downlink Payload (prefix 0xA8):
1233
1234 (% class="box infomessage" %)
1235 (((
1236 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1237 )))
1238
1239
1240
1241 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1242
1243 Clear counting for counting mode
1244
1245 * AT Command:
1246
1247 (% class="box infomessage" %)
1248 (((
1249 **AT+CLRCOUNT ~/~/ clear all counting**
1250 )))
1251
1252 * Downlink Payload (prefix 0xA6):
1253
1254 (% class="box infomessage" %)
1255 (((
1256 **0x A6 01     ~/~/ clear all counting,**
1257 )))
1258
1259
1260
1261 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1262
1263 * AT Command:
1264
1265 (% class="box infomessage" %)
1266 (((
1267 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1268 )))
1269
1270 * Downlink Payload (prefix 0xA7):
1271
1272 (% class="box infomessage" %)
1273 (((
1274 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1275 )))
1276
1277 (((
1278 range: aa bb cc:0 to 16777215,  (unit:second)
1279
1280
1281 )))
1282
1283
1284 == 3.5 Integrate with Mydevice ==
1285
1286 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:
1287
1288 (((
1289 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1290 )))
1291
1292 (((
1293 (% 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:
1294 )))
1295
1296 [[image:1653356737703-362.png||height="232" width="732"]]
1297
1298 [[image:image-20220524094641-11.png||height="390" width="723"]]
1299
1300
1301 [[image:image-20220524094641-12.png||height="402" width="718"]]
1302
1303
1304 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1305
1306 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1307
1308 Search under The things network
1309
1310 [[image:1653356838789-523.png||height="337" width="740"]]
1311
1312
1313
1314 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1315
1316 [[image:image-20220524094909-1.png||height="335" width="729"]]
1317
1318
1319 [[image:image-20220524094909-2.png||height="337" width="729"]]
1320
1321
1322 [[image:image-20220524094909-3.png||height="338" width="727"]]
1323
1324
1325 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1326
1327
1328 [[image:image-20220524094909-5.png||height="341" width="734"]]
1329
1330
1331
1332 == 3.6 Interface Detail ==
1333
1334 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1335
1336 Support NPN Type sensor
1337
1338 [[image:1653356991268-289.png]]
1339
1340
1341
1342 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1343
1344 (((
1345 The DI port of LT-22222-L can support NPN or PNP output sensor.
1346 )))
1347
1348 (((
1349 (((
1350 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
1351 )))
1352 )))
1353
1354 [[image:1653357170703-587.png]]
1355
1356 (((
1357 (((
1358 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1359 )))
1360 )))
1361
1362 (((
1363
1364 )))
1365
1366 (((
1367 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1368 )))
1369
1370 (((
1371 This type of sensor will output a low signal GND when active.
1372 )))
1373
1374 * (((
1375 Connect sensor’s output to DI1-
1376 )))
1377 * (((
1378 Connect sensor’s VCC to DI1+.
1379 )))
1380
1381 (((
1382 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1383 )))
1384
1385 (((
1386 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1387 )))
1388
1389 (((
1390 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.
1391 )))
1392
1393 (((
1394
1395 )))
1396
1397 (((
1398 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1399 )))
1400
1401 (((
1402 This type of sensor will output a high signal (example 24v) when active.
1403 )))
1404
1405 * (((
1406 Connect sensor’s output to DI1+
1407 )))
1408 * (((
1409 Connect sensor’s GND DI1-.
1410 )))
1411
1412 (((
1413 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1414 )))
1415
1416 (((
1417 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1418 )))
1419
1420 (((
1421 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.
1422 )))
1423
1424 (((
1425
1426 )))
1427
1428 (((
1429 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1430 )))
1431
1432 (((
1433 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1434 )))
1435
1436 * (((
1437 Connect sensor’s output to DI1+ with a serial 50K resistor
1438 )))
1439 * (((
1440 Connect sensor’s GND DI1-.
1441 )))
1442
1443 (((
1444 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1445 )))
1446
1447 (((
1448 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1449 )))
1450
1451 (((
1452 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.
1453 )))
1454
1455
1456
1457 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1458
1459 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1460
1461 [[image:1653357531600-905.png]]
1462
1463
1464
1465 === 3.6.4 Analog Input Interface ===
1466
1467 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:
1468
1469
1470 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1471
1472 [[image:1653357592296-182.png]]
1473
1474 Example to connect a 4~~20mA sensor
1475
1476 We take the wind speed sensor as an example for reference only.
1477
1478
1479 **Specifications of the wind speed sensor:**
1480
1481 Red:  12~~24v
1482
1483 Yellow:  4~~20mA
1484
1485 Black:  GND
1486
1487
1488 **Connection diagram:**
1489
1490 [[image:1653357640609-758.png]]
1491
1492 [[image:1653357648330-671.png||height="155" width="733"]]
1493
1494
1495
1496 === 3.6.5 Relay Output ===
1497
1498 (((
1499 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:
1500 )))
1501
1502 [[image:image-20220524100215-9.png]]
1503
1504 [[image:image-20220524100215-10.png||height="382" width="723"]]
1505
1506
1507
1508 == 3.7 LEDs Indicators ==
1509
1510 [[image:image-20220524100748-11.png]]
1511
1512
1513 = 4. Use AT Command =
1514
1515 == 4.1 Access AT Command ==
1516
1517 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.
1518
1519 [[image:1653358238933-385.png]]
1520
1521
1522 (((
1523 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:
1524 )))
1525
1526 [[image:1653358355238-883.png]]
1527
1528
1529 (((
1530 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/]]
1531 )))
1532
1533 (((
1534 AT+<CMD>?        : Help on <CMD>
1535 )))
1536
1537 (((
1538 AT+<CMD>         : Run <CMD>
1539 )))
1540
1541 (((
1542 AT+<CMD>=<value> : Set the value
1543 )))
1544
1545 (((
1546 AT+<CMD>=?       : Get the value
1547 )))
1548
1549 (((
1550 ATZ: Trig a reset of the MCU
1551 )))
1552
1553 (((
1554 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1555 )))
1556
1557 (((
1558 AT+DEUI: Get or Set the Device EUI
1559 )))
1560
1561 (((
1562 AT+DADDR: Get or Set the Device Address
1563 )))
1564
1565 (((
1566 AT+APPKEY: Get or Set the Application Key
1567 )))
1568
1569 (((
1570 AT+NWKSKEY: Get or Set the Network Session Key
1571 )))
1572
1573 (((
1574 AT+APPSKEY: Get or Set the Application Session Key
1575 )))
1576
1577 (((
1578 AT+APPEUI: Get or Set the Application EUI
1579 )))
1580
1581 (((
1582 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1583 )))
1584
1585 (((
1586 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1587 )))
1588
1589 (((
1590 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1591 )))
1592
1593 (((
1594 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1595 )))
1596
1597 (((
1598 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1599 )))
1600
1601 (((
1602 AT+RX2FQ: Get or Set the Rx2 window frequency
1603 )))
1604
1605 (((
1606 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1607 )))
1608
1609 (((
1610 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1611 )))
1612
1613 (((
1614 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1615 )))
1616
1617 (((
1618 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1619 )))
1620
1621 (((
1622 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1623 )))
1624
1625 (((
1626 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1627 )))
1628
1629 (((
1630 AT+NWKID: Get or Set the Network ID
1631 )))
1632
1633 (((
1634 AT+FCU: Get or Set the Frame Counter Uplink
1635 )))
1636
1637 (((
1638 AT+FCD: Get or Set the Frame Counter Downlink
1639 )))
1640
1641 (((
1642 AT+CLASS: Get or Set the Device Class
1643 )))
1644
1645 (((
1646 AT+JOIN: Join network
1647 )))
1648
1649 (((
1650 AT+NJS: Get OTAA Join Status
1651 )))
1652
1653 (((
1654 AT+SENDB: Send hexadecimal data along with the application port
1655 )))
1656
1657 (((
1658 AT+SEND: Send text data along with the application port
1659 )))
1660
1661 (((
1662 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1663 )))
1664
1665 (((
1666 AT+RECV: Print last received data in raw format
1667 )))
1668
1669 (((
1670 AT+VER: Get current image version and Frequency Band
1671 )))
1672
1673 (((
1674 AT+CFM: Get or Set the confirmation mode (0-1)
1675 )))
1676
1677 (((
1678 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1679 )))
1680
1681 (((
1682 AT+SNR: Get the SNR of the last received packet
1683 )))
1684
1685 (((
1686 AT+RSSI: Get the RSSI of the last received packet
1687 )))
1688
1689 (((
1690 AT+TDC: Get or set the application data transmission interval in ms
1691 )))
1692
1693 (((
1694 AT+PORT: Get or set the application port
1695 )))
1696
1697 (((
1698 AT+DISAT: Disable AT commands
1699 )))
1700
1701 (((
1702 AT+PWORD: Set password, max 9 digits
1703 )))
1704
1705 (((
1706 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1707 )))
1708
1709 (((
1710 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1711 )))
1712
1713 (((
1714 AT+CFG: Print all settings
1715
1716
1717 )))
1718
1719
1720
1721 == 4.2 Common AT Command Sequence ==
1722
1723 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1724
1725 (((
1726
1727
1728 **If device has not joined network yet:**
1729 )))
1730
1731 (((
1732 (% style="background-color:#dcdcdc" %)123456
1733 )))
1734
1735 (((
1736 (% style="background-color:#dcdcdc" %)AT+FDR
1737 )))
1738
1739 (((
1740 (% style="background-color:#dcdcdc" %)123456
1741 )))
1742
1743 (((
1744 (% style="background-color:#dcdcdc" %)AT+NJM=0
1745 )))
1746
1747 (((
1748 (% style="background-color:#dcdcdc" %)ATZ
1749 )))
1750
1751
1752 (((
1753 **If device already joined network:**
1754 )))
1755
1756 (((
1757 (% style="background-color:#dcdcdc" %)AT+NJM=0
1758 )))
1759
1760 (((
1761 (% style="background-color:#dcdcdc" %)ATZ
1762
1763
1764 )))
1765
1766
1767
1768 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1769
1770 (((
1771
1772
1773 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1774 )))
1775
1776 (((
1777 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1778 )))
1779
1780 (((
1781 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1782 )))
1783
1784 (((
1785 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1786 )))
1787
1788 (((
1789 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1790 )))
1791
1792 (((
1793 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1794 )))
1795
1796 (((
1797 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1798 )))
1799
1800 (((
1801 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1802 )))
1803
1804 (((
1805 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1806 )))
1807
1808 (((
1809 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1810 )))
1811
1812 (((
1813 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1814 )))
1815
1816 (((
1817 (% 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.
1818 )))
1819
1820 (((
1821 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1822
1823
1824 )))
1825
1826 (((
1827 (% style="color:red" %)**Note:**
1828 )))
1829
1830 (((
1831 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1832 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1833 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.
1834 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
1835 )))
1836
1837 (((
1838 [[image:1653359097980-169.png||height="188" width="729"]]
1839 )))
1840
1841 (((
1842
1843 )))
1844
1845
1846 === 4.2.3 Change to Class A ===
1847
1848 If sensor JOINED
1849 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1850 ATZ
1851
1852
1853 = 5. FAQ =
1854
1855 == 5.1 How to upgrade the image? ==
1856
1857
1858 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1859
1860 * Support new features
1861 * For bug fix
1862 * Change LoRaWAN bands.
1863
1864 Below shows the hardware connection for how to upload an image to the LT:
1865
1866 [[image:1653359603330-121.png]]
1867
1868
1869 (((
1870 (% 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]].
1871 (% 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/]].
1872 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1873
1874
1875 (% style="color:blue" %)**For LT-22222-L**(%%):
1876 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.
1877 )))
1878
1879 [[image:image-20220524103407-12.png]]
1880
1881 [[image:image-20220524103429-13.png]]
1882
1883 [[image:image-20220524104033-15.png]]
1884
1885
1886 (% 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:
1887
1888 [[image:1653360054704-518.png||height="186" width="745"]]
1889
1890
1891 (((
1892 (((
1893
1894
1895 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1896 )))
1897 )))
1898
1899 (((
1900 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1901 )))
1902
1903 (((
1904
1905
1906 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1907 )))
1908
1909 (((
1910 (((
1911 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1912 )))
1913 )))
1914
1915 (((
1916 (((
1917 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1918
1919
1920 )))
1921 )))
1922
1923 (((
1924 (% 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.
1925 )))
1926
1927 (((
1928 [[image:1653360231087-571.png||height="401" width="727"]]
1929 )))
1930
1931 (((
1932 (% 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.
1933 )))
1934
1935
1936 (((
1937 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1938 )))
1939
1940 (((
1941 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1942 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1943 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1944 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1945 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1946 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1947 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1948 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1949 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1950 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1951 )))
1952
1953
1954 (((
1955 As shown in below:
1956 )))
1957
1958 [[image:1653360498588-932.png||height="485" width="726"]]
1959
1960
1961 == 5.4 Can I see counting event in Serial? ==
1962
1963 (((
1964 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.
1965
1966
1967 == 5.5 Can i use point to point communication for LT-22222-L? ==
1968
1969 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1970 )))
1971
1972 (((
1973
1974
1975 = 6. Trouble Shooting =
1976 )))
1977
1978 (((
1979 (((
1980 == 6.1 Downlink doesn’t work, how to solve it? ==
1981 )))
1982 )))
1983
1984 (((
1985 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1986 )))
1987
1988 (((
1989
1990
1991 == 6.2 Have trouble to upload image. ==
1992 )))
1993
1994 (((
1995 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1996 )))
1997
1998 (((
1999
2000
2001 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2002 )))
2003
2004 (((
2005 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2006 )))
2007
2008
2009
2010 = 7. Order Info =
2011
2012
2013 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2014
2015
2016 (% style="color:#4f81bd" %)**XXX:**
2017
2018 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2019 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2020 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2021 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2022 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2023 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2024 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2025 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2026 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2027
2028 = 8. Packing Info =
2029
2030
2031 **Package Includes**:
2032
2033 * LT-22222-L I/O Controller x 1
2034 * Stick Antenna for LoRa RF part x 1
2035 * Bracket for controller x1
2036 * Program cable x 1
2037
2038 **Dimension and weight**:
2039
2040 * Device Size: 13.5 x 7 x 3 cm
2041 * Device Weight: 105g
2042 * Package Size / pcs : 14.5 x 8 x 5 cm
2043 * Weight / pcs : 170g
2044
2045 = 9. Support =
2046
2047 * (((
2048 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.
2049 )))
2050 * (((
2051 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]]
2052 )))
2053
2054 = 10. Reference​​​​​ =
2055
2056 * 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]]
2057 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2058 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2059 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
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