Version 82.38 by Xiaoling on 2022/06/25 15:11
Show last authors
1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14
15
16
17 = 1.Introduction =
18
19 == 1.1 What is LT Series I/O Controller ==
20
21 (((
22
23
24 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.
25 )))
26
27 (((
28 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.
29 )))
30
31 (((
32 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
33 )))
34
35 (((
36 The use environment includes:
37 )))
38
39 (((
40 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.
41 )))
42
43 (((
44 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
45 )))
46
47 (((
48 [[image:1653295757274-912.png]]
49
50
51 )))
52
53
54 == 1.2  Specifications ==
55
56 (((
57
58
59 **Hardware System:**
60 )))
61
62 * (((
63 STM32L072CZT6 MCU
64 )))
65 * (((
66 SX1276/78 Wireless Chip 
67 )))
68 * (((
69 (((
70 Power Consumption:
71 )))
72
73 * (((
74 Idle: 4mA@12v
75 )))
76 * (((
77 20dB Transmit: 34mA@12v
78 )))
79 )))
80
81 (((
82
83
84 **Interface for Model: LT22222-L:**
85 )))
86
87 * (((
88 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
89 )))
90 * (((
91 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
92 )))
93 * (((
94 2 x Relay Output (5A@250VAC / 30VDC)
95 )))
96 * (((
97 2 x 0~~20mA Analog Input (res:0.01mA)
98 )))
99 * (((
100 2 x 0~~30V Analog Input (res:0.01v)
101 )))
102 * (((
103 Power Input 7~~ 24V DC. 
104 )))
105
106 (((
107
108
109 **LoRa Spec:**
110 )))
111
112 * (((
113 (((
114 Frequency Range:
115 )))
116
117 * (((
118 Band 1 (HF): 862 ~~ 1020 Mhz
119 )))
120 * (((
121 Band 2 (LF): 410 ~~ 528 Mhz
122 )))
123 )))
124 * (((
125 168 dB maximum link budget.
126 )))
127 * (((
128 +20 dBm - 100 mW constant RF output vs.
129 )))
130 * (((
131 +14 dBm high efficiency PA.
132 )))
133 * (((
134 Programmable bit rate up to 300 kbps.
135 )))
136 * (((
137 High sensitivity: down to -148 dBm.
138 )))
139 * (((
140 Bullet-proof front end: IIP3 = -12.5 dBm.
141 )))
142 * (((
143 Excellent blocking immunity.
144 )))
145 * (((
146 Low RX current of 10.3 mA, 200 nA register retention.
147 )))
148 * (((
149 Fully integrated synthesizer with a resolution of 61 Hz.
150 )))
151 * (((
152 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
153 )))
154 * (((
155 Built-in bit synchronizer for clock recovery.
156 )))
157 * (((
158 Preamble detection.
159 )))
160 * (((
161 127 dB Dynamic Range RSSI.
162 )))
163 * (((
164 Automatic RF Sense and CAD with ultra-fast AFC.
165 )))
166 * (((
167 Packet engine up to 256 bytes with CRC.
168
169
170
171
172 )))
173
174 == 1.3 Features ==
175
176 * LoRaWAN Class A & Class C protocol
177 * Optional Customized LoRa Protocol
178 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
179 * AT Commands to change parameters
180 * Remote configure parameters via LoRa Downlink
181 * Firmware upgradable via program port
182 * Counting
183
184
185
186
187
188 == 1.4  Applications ==
189
190 * Smart Buildings & Home Automation
191 * Logistics and Supply Chain Management
192 * Smart Metering
193 * Smart Agriculture
194 * Smart Cities
195 * Smart Factory
196
197
198
199
200
201 == 1.5 Hardware Variants ==
202
203 (% border="1" style="background-color:#f7faff; width:500px" %)
204 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
205 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
206 * 2 x Digital Input (Bi-direction)
207 * 2 x Digital Output
208 * 2 x Relay Output (5A@250VAC / 30VDC)
209 * 2 x 0~~20mA Analog Input (res:0.01mA)
210 * 2 x 0~~30V Analog Input (res:0.01v)
211 * 1 x Counting Port
212 )))
213
214
215 = 2. Power ON Device =
216
217 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.
218
219 (((
220 PWR will on when device is properly powered.
221 )))
222
223 [[image:1653297104069-180.png]]
224
225
226
227 = 3. Operation Mode =
228
229 == 3.1 How it works? ==
230
231 (((
232 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. 
233 )))
234
235 (((
236 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.
237 )))
238
239
240 == 3.2 Example to join LoRaWAN network ==
241
242 (((
243 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. 
244 )))
245
246 [[image:image-20220523172350-1.png||height="266" width="864"]]
247
248
249 (((
250 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:
251 )))
252
253 (((
254 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
255 )))
256
257 (((
258 Each LT is shipped with a sticker with the default device EUI as below:
259 )))
260
261 [[image:1653297924498-393.png]]
262
263
264 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
265
266 Add APP EUI in the application.
267
268 [[image:1653297955910-247.png||height="321" width="716"]]
269
270
271 Add APP KEY and DEV EUI
272
273 [[image:1653298023685-319.png]]
274
275
276 (((
277 (% style="color:blue" %)**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.
278 )))
279
280 [[image:1653298044601-602.png||height="405" width="709"]]
281
282
283
284 == 3.3 Uplink Payload ==
285
286 There are five working modes + one interrupt mode on LT for different type application:
287
288 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
289 * **MOD2**: Double DI Counting + DO + RO
290 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
291 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
292 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
293 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
294
295 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
296
297 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
298
299 [[image:image-20220523174024-3.png]]
300
301 (((
302
303
304 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
305 )))
306
307 [[image:image-20220523174254-4.png]]
308
309 * RO is for relay. ROx=1 : close，ROx=0 always open.
310 * DI is for digital input. DIx=1: high or float, DIx=0: low.
311 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
312
313 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
314
315 For example if payload is: [[image:image-20220523175847-2.png]]
316
317
318 **The value for the interface is:  **
319
320 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
321
322 AVI2 channel voltage is 0x04AC/1000=1.196V
323
324 ACI1 channel current is 0x1310/1000=4.880mA
325
326 ACI2 channel current is 0x1300/1000=4.864mA
327
328 The last byte 0xAA= 10101010(B) means
329
330 * [1] RO1 relay channel is close and the RO1 LED is ON.
331 * [0] RO2 relay channel is open and RO2 LED is OFF;
332
333 **LT22222-L:**
334
335 * [1] DI2 channel is high input and DI2 LED is ON;
336 * [0] DI1 channel is low input;
337
338 * [0] DO3 channel output state
339 ** DO3 is float in case no load between DO3 and V+.;
340 ** DO3 is high in case there is load between DO3 and V+.
341 ** DO3 LED is off in both case
342 * [1] DO2 channel output is low and DO2 LED is ON.
343 * [0] DO1 channel output state
344 ** DO1 is float in case no load between DO1 and V+.;
345 ** DO1 is high in case there is load between DO1 and V+.
346 ** DO1 LED is off in both case
347
348 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
349
350
351 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
352
353 (((
354 Total : 11 bytes payload
355 )))
356
357 [[image:image-20220523180452-3.png]]
358
359
360 (((
361 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
362 )))
363
364 [[image:image-20220523180506-4.png]]
365
366 * RO is for relay. ROx=1 : close，ROx=0 always open.
367 * FIRST: Indicate this is the first packet after join network.
368 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
369
370 (((
371 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
372 )))
373
374 (((
375
376
377 **To use counting mode, please run:**
378 )))
379
380 (% class="box infomessage" %)
381 (((
382 (((
383 **AT+MOD=2**
384
385 **ATZ**
386 )))
387 )))
388
389 (((
390
391
392 (% style="color:#4f81bd" %)**AT Commands for counting:**
393 )))
394
395 (((
396 **For LT22222-L:**
397
398
399 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
400
401 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
402
403 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
404
405 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
406
407 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
408
409 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
410 )))
411
412
413
414 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
415
416 **LT22222-L**: This mode the DI1 is used as a counting pin.
417
418 [[image:image-20220523181246-5.png]]
419
420 (((
421 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
422 )))
423
424 [[image:image-20220523181301-6.png]]
425
426 * RO is for relay. ROx=1 : close，ROx=0 always open.
427 * FIRST: Indicate this is the first packet after join network.
428 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
429
430 (((
431 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
432 )))
433
434 (((
435 **To use counting mode, please run:**
436 )))
437
438 (% class="box infomessage" %)
439 (((
440 (((
441 **AT+MOD=3**
442
443 **ATZ**
444 )))
445 )))
446
447 (((
448 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
449 )))
450
451
452
453 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
454
455
456 **LT22222-L**: This mode the DI1 is used as a counting pin.
457
458 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.
459
460 [[image:image-20220523181903-8.png]]
461
462
463 (((
464 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
465 )))
466
467 [[image:image-20220523181727-7.png]]
468
469 * RO is for relay. ROx=1 : close，ROx=0 always open.
470 * FIRST: Indicate this is the first packet after join network.
471 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
472
473 (((
474 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
475 )))
476
477 (((
478
479
480 **To use this mode, please run:**
481 )))
482
483 (% class="box infomessage" %)
484 (((
485 (((
486 **AT+MOD=4**
487
488 **ATZ**
489 )))
490 )))
491
492
493
494 (((
495 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
496 )))
497
498 (((
499
500
501 **Plus below command for AVI1 Counting:**
502
503
504 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
505
506 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
507
508 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
509
510 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
511 )))
512
513
514
515 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
516
517
518 **LT22222-L**: This mode the DI1 is used as a counting pin.
519
520 [[image:image-20220523182334-9.png]]
521
522 (((
523
524
525 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
526 )))
527
528 * RO is for relay. ROx=1 : close，ROx=0 always open.
529 * FIRST: Indicate this is the first packet after join network.
530 * (((
531 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
532 )))
533
534 (((
535 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
536 )))
537
538 (((
539
540
541 **To use this mode, please run:**
542 )))
543
544 (% class="box infomessage" %)
545 (((
546 (((
547 **AT+MOD=5**
548
549 **ATZ**
550 )))
551 )))
552
553 (((
554 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
555 )))
556
557
558
559 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
560
561
562 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
563
564 For example, if user has configured below commands:
565
566 * **AT+MOD=1 ** **~-~->** The normal working mode
567 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
568
569 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
570
571 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
572 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.**
573
574 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
575
576 (% style="color:#4f81bd" %)**Trigger base on voltage**:
577
578 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
579
580 **Example:**
581
582 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)
583
584 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
585
586
587
588 (% style="color:#4f81bd" %)**Trigger base on current**:
589
590 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
591
592 **Example:**
593
594 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
595
596
597
598 (% style="color:#4f81bd" %)**Trigger base on DI status**:
599
600 DI status trigger Flag.
601
602 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
603
604
605 **Example:**
606
607 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
608
609
610 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
611
612 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
613
614 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
615
616 AA: Code for this downlink Command:
617
618 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
619
620 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
621
622 yy2 yy2: AC1 or AV1 high limit.
623
624 yy3 yy3: AC2 or AV2 low limit.
625
626 Yy4 yy4: AC2 or AV2 high limit.
627
628
629 **Example1**: AA 00 13 88 00 00 00 00 00 00
630
631 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
632
633
634 **Example2**: AA 02 01 00
635
636 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
637
638
639
640 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
641
642 MOD6 Payload : total 11 bytes payload
643
644 [[image:image-20220524085923-1.png]]
645
646
647 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
648
649 [[image:image-20220524090106-2.png]]
650
651 * Each bits shows if the corresponding trigger has been configured.
652
653 **Example:**
654
655 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
656
657
658 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
659
660 [[image:image-20220524090249-3.png]]
661
662 * Each bits shows which status has been trigger on this uplink.
663
664 **Example:**
665
666 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
667
668
669 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
670
671 [[image:image-20220524090456-4.png]]
672
673 * Each bits shows which status has been trigger on this uplink.
674
675 **Example:**
676
677 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
678
679 00000101: Means both DI1 and DI2 trigger are enabled.
680
681
682 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
683
684 Downlink command to poll MOD6 status:
685
686 **AB 06**
687
688 When device got this command, it will send the MOD6 payload.
689
690
691
692 === 3.3.7 Payload Decoder ===
693
694 (((
695
696
697 **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/]]
698
699
700 )))
701
702
703 == 3.4 ​Configure LT via AT or Downlink ==
704
705 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
706
707 (((
708 There are two kinds of Commands:
709 )))
710
711 * (% 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]]
712
713 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
714
715 === 3.4.1 Common Commands ===
716
717 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]]
718
719
720
721 === 3.4.2 Sensor related commands ===
722
723 ==== 3.4.2.1 Set Transmit Interval ====
724
725 Set device uplink interval.
726
727 * (% style="color:#037691" %)**AT Command:**
728
729 **AT+TDC=N **
730
731
732 **Example: **AT+TDC=30000. Means set interval to 30 seconds
733
734
735 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
736
737 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
738
739
740
741
742 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
743
744 Set work mode.
745
746 * (% style="color:#037691" %)**AT Command:**
747
748 **AT+MOD=N  **
749
750
751 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
752
753
754 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
755
756 **0x0A aa    ** ~/~/ Same as AT+MOD=aa
757
758
759
760
761 ==== 3.4.2.3 Poll an uplink ====
762
763 * (% style="color:#037691" %)**AT Command:**
764
765 There is no AT Command to poll uplink
766
767
768 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
769
770 **0x08 FF     **~/~/ Poll an uplink
771
772 **Example**: 0x08FF, ask device to send an Uplink
773
774
775
776 ==== 3.4.2.4 Enable Trigger Mode ====
777
778 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
779
780 * (% style="color:#037691" %)**AT Command:**
781
782 **AT+ADDMOD6=1 or 0**
783
784 1: Enable Trigger Mode
785
786 0: Disable Trigger Mode
787
788
789 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
790
791 **0x0A 06 aa    ** ~/~/ Same as AT+ADDMOD6=aa
792
793
794
795
796 ==== 3.4.2.5 Poll trigger settings ====
797
798 Poll trigger settings,
799
800 * (% style="color:#037691" %)**AT Command:**
801
802 There is no AT Command for this feature.
803
804
805 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
806
807 **0xAB 06         **~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
808
809
810
811
812 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
813
814 Enable Disable DI1/DI2/DI2 as trigger,
815
816 * (% style="color:#037691" %)**AT Command:**
817
818 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
819
820
821 **Example:**
822
823 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
824
825 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
826
827 **0xAA 02 aa bb        **~/~/ Same as AT+DTRI=aa,bb
828
829
830
831
832 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
833
834 Set DI1 or DI3(for LT-33222-L) trigger.
835
836 * (% style="color:#037691" %)**AT Command:**
837
838 **AT+TRIG1=a,b**
839
840 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
841
842 b : delay timing.
843
844
845 **Example:**
846
847 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
848
849
850 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
851 * **0x09 01 aa bb cc    ** ~/~/ same as AT+TRIG1=aa,0x(bb cc)
852
853
854
855 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
856
857 Set DI2 trigger.
858
859 * (% style="color:#037691" %)**AT Command:**
860
861 **AT+TRIG2=a,b**
862
863
864 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
865
866 b : delay timing.
867
868
869 **Example:**
870
871 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
872
873
874 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
875
876 **0x09 02 aa bb cc           **~/~/ same as AT+TRIG1=aa,0x(bb cc)
877
878
879
880
881 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
882
883 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
884
885 * (% style="color:#037691" %)**AT Command**
886
887 **AT+ACLIM**
888
889
890 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
891
892 **0x AA 01 aa bb cc dd ee ff gg hh        ** ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
893
894
895
896
897 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
898
899 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
900
901 * (% style="color:#037691" %)**AT Command**
902
903 **AT+AVLIM  See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
904
905
906 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
907
908 **0x AA 00 aa bb cc dd ee ff gg hh    ** ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
909
910
911
912
913 ==== 3.4.2.11 Trigger – Set minimum interval ====
914
915 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
916
917 * (% style="color:#037691" %)**AT Command**
918
919 **AT+ATDC=5        ** Device won't response the second trigger within 5 minute after the first trigger.
920
921
922 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
923
924 **0x AC aa bb   ** ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
925
926
927
928
929 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
930
931 * (% style="color:#037691" %)**AT Command**
932
933 There is no AT Command to control Digital Output
934
935
936 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
937 * **0x02 aa bb cc     **~/~/ Set DO1/DO2/DO3 output
938
939 (((
940 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
941 )))
942
943 (((
944 01: Low,  00: High ,  11: No action
945 )))
946
947 [[image:image-20220524092754-5.png]]
948
949 (((
950 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
951 )))
952
953 (((
954 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
955 )))
956
957
958
959
960 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
961
962 * (% style="color:#037691" %)**AT Command**
963
964 There is no AT Command to control Digital Output
965
966
967 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
968
969 **0xA9 aa bb cc     **~/~/ Set DO1/DO2/DO3 output with time control
970
971
972 This is to control the digital output time of DO pin. Include four bytes:
973
974 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
975
976 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
977
978 01: DO pins will change back to original state after timeout.
979
980 00: DO pins will change to an inverter state after timeout 
981
982
983 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
984
985 [[image:image-20220524093238-6.png]]
986
987
988 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
989
990 [[image:image-20220524093328-7.png]]
991
992
993 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
994
995 [[image:image-20220524093351-8.png]]
996
997
998 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
999
1000 Latching time. Unit: ms
1001
1002 Device will upload a packet if downlink code executes successfully.
1003
1004
1005 **Example payload:**
1006
1007 **~1. A9 01 01 01 01 07 D0**
1008
1009 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1010
1011 **2. A9 01 00 01 11 07 D0**
1012
1013 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1014
1015 **3. A9 00 00 00 00 07 D0**
1016
1017 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1018
1019 **4. A9 00 11 01 00 07 D0**
1020
1021 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
1022
1023
1024
1025
1026 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1027
1028 * (% style="color:#037691" %)**AT Command:**
1029
1030 There is no AT Command to control Relay Output
1031
1032
1033 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1034
1035 **0x03 aa bb     **~/~/ Set RO1/RO2 output
1036
1037
1038 (((
1039 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1040 )))
1041
1042 (((
1043 01: Close ,  00: Open , 11: No action
1044 )))
1045
1046 (((
1047 [[image:image-20220524093724-9.png]]
1048 )))
1049
1050 Device will upload a packet if downlink code executes successfully.
1051
1052
1053
1054
1055 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1056
1057 * (% style="color:#037691" %)**AT Command:**
1058
1059 There is no AT Command to control Relay Output
1060
1061
1062 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1063
1064 **0x05 aa bb cc dd     **~/~/ Set RO1/RO2 relay with time control
1065
1066
1067 This is to control the relay output time of relay. Include four bytes:
1068
1069 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1070
1071 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1072
1073 01: Relays will change back to original state after timeout.
1074
1075 00: Relays will change to an inverter state after timeout
1076
1077
1078 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1079
1080 [[image:image-20220524093831-10.png]]
1081
1082
1083 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1084
1085 Device will upload a packet if downlink code executes successfully.
1086
1087
1088 **Example payload:**
1089
1090 **~1. 05 01 11 07 D0**
1091
1092 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1093
1094 **2. 05 01 10 07 D0**
1095
1096 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1097
1098 **3. 05 00 01 07 D0**
1099
1100 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1101
1102 **4. 05 00 00 07 D0**
1103
1104 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1105
1106
1107
1108
1109 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1110
1111 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1112
1113 * (% style="color:#037691" %)**AT Command:**
1114
1115 **AT+VOLMAX   ** ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1116
1117
1118 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1119
1120 **0xA5 aa bb cc   **~/~/ Same as AT+VOLMAX=(aa bb),cc
1121
1122
1123
1124
1125 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1126
1127 * (% style="color:#037691" %)**AT Command:**
1128
1129 **AT+SETCNT=aa,(bb cc dd ee) **
1130
1131 aa: 1: Set count1,
1132
1133 2: Set count2,
1134
1135 3: Set AV1 count
1136
1137 Bb cc dd ee: number to be set
1138
1139
1140 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1141
1142 **0x A8 aa bb cc dd ee     **~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1143
1144
1145
1146
1147 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1148
1149 Clear counting for counting mode
1150
1151 * (% style="color:#037691" %)**AT Command:**
1152
1153 **AT+CLRCOUNT ** ~/~/ clear all counting
1154
1155
1156 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1157
1158 **0x A6 01    ** ~/~/ clear all counting
1159
1160
1161
1162
1163 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1164
1165 * (% style="color:#037691" %)**AT Command:**
1166
1167 **AT+COUTIME=60  **~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1168
1169
1170 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1171
1172 **0x A7 aa bb cc     **~/~/ same as AT+COUTIME =aa bb cc,
1173
1174 (((
1175 range: aa bb cc:0 to 16777215,  (unit:second)
1176
1177
1178 )))
1179
1180
1181
1182 == 3.5 Integrate with Mydevice ==
1183
1184 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:
1185
1186 (((
1187 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1188 )))
1189
1190 (((
1191 (% 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:
1192 )))
1193
1194 [[image:1653356737703-362.png||height="232" width="732"]]
1195
1196 [[image:image-20220524094641-11.png||height="390" width="723"]]
1197
1198
1199 [[image:image-20220524094641-12.png||height="402" width="718"]]
1200
1201
1202 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1203
1204 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1205
1206 Search under The things network
1207
1208 [[image:1653356838789-523.png||height="337" width="740"]]
1209
1210
1211
1212 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1213
1214 [[image:image-20220524094909-1.png||height="335" width="729"]]
1215
1216
1217 [[image:image-20220524094909-2.png||height="337" width="729"]]
1218
1219
1220 [[image:image-20220524094909-3.png||height="338" width="727"]]
1221
1222
1223 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1224
1225
1226 [[image:image-20220524094909-5.png||height="341" width="734"]]
1227
1228
1229
1230 == 3.6 Interface Detail ==
1231
1232 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1233
1234 Support NPN Type sensor
1235
1236 [[image:1653356991268-289.png]]
1237
1238
1239
1240 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1241
1242 (((
1243 The DI port of LT-22222-L can support NPN or PNP output sensor.
1244 )))
1245
1246 (((
1247 (((
1248 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
1249 )))
1250 )))
1251
1252 [[image:1653357170703-587.png]]
1253
1254 (((
1255 (((
1256 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1257 )))
1258 )))
1259
1260 (((
1261
1262 )))
1263
1264 (((
1265 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1266 )))
1267
1268 (((
1269 This type of sensor will output a low signal GND when active.
1270 )))
1271
1272 * (((
1273 Connect sensor’s output to DI1-
1274 )))
1275 * (((
1276 Connect sensor’s VCC to DI1+.
1277 )))
1278
1279 (((
1280 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1281 )))
1282
1283 (((
1284 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1285 )))
1286
1287 (((
1288 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.
1289 )))
1290
1291 (((
1292
1293 )))
1294
1295 (((
1296 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1297 )))
1298
1299 (((
1300 This type of sensor will output a high signal (example 24v) when active.
1301 )))
1302
1303 * (((
1304 Connect sensor’s output to DI1+
1305 )))
1306 * (((
1307 Connect sensor’s GND DI1-.
1308 )))
1309
1310 (((
1311 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1312 )))
1313
1314 (((
1315 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1316 )))
1317
1318 (((
1319 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.
1320 )))
1321
1322 (((
1323
1324 )))
1325
1326 (((
1327 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1328 )))
1329
1330 (((
1331 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1332 )))
1333
1334 * (((
1335 Connect sensor’s output to DI1+ with a serial 50K resistor
1336 )))
1337 * (((
1338 Connect sensor’s GND DI1-.
1339 )))
1340
1341 (((
1342 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1343 )))
1344
1345 (((
1346 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1347 )))
1348
1349 (((
1350 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.
1351 )))
1352
1353
1354
1355 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1356
1357 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1358
1359 [[image:1653357531600-905.png]]
1360
1361
1362
1363 === 3.6.4 Analog Input Interface ===
1364
1365 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:
1366
1367
1368 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1369
1370 [[image:1653357592296-182.png]]
1371
1372 Example to connect a 4~~20mA sensor
1373
1374 We take the wind speed sensor as an example for reference only.
1375
1376
1377 **Specifications of the wind speed sensor:**
1378
1379 Red:  12~~24v
1380
1381 Yellow:  4~~20mA
1382
1383 Black:  GND
1384
1385
1386 **Connection diagram:**
1387
1388 [[image:1653357640609-758.png]]
1389
1390 [[image:1653357648330-671.png||height="155" width="733"]]
1391
1392
1393
1394 === 3.6.5 Relay Output ===
1395
1396 (((
1397 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:
1398 )))
1399
1400 [[image:image-20220524100215-9.png]]
1401
1402 [[image:image-20220524100215-10.png||height="382" width="723"]]
1403
1404
1405
1406 == 3.7 LEDs Indicators ==
1407
1408 [[image:image-20220524100748-11.png]]
1409
1410
1411
1412 = 4. Use AT Command =
1413
1414 == 4.1 Access AT Command ==
1415
1416 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.
1417
1418 [[image:1653358238933-385.png]]
1419
1420
1421 (((
1422 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:
1423 )))
1424
1425 [[image:1653358355238-883.png]]
1426
1427
1428 (((
1429 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/]]
1430 )))
1431
1432 (((
1433 AT+<CMD>?        : Help on <CMD>
1434 )))
1435
1436 (((
1437 AT+<CMD>         : Run <CMD>
1438 )))
1439
1440 (((
1441 AT+<CMD>=<value> : Set the value
1442 )))
1443
1444 (((
1445 AT+<CMD>=?       : Get the value
1446 )))
1447
1448 (((
1449 ATZ: Trig a reset of the MCU
1450 )))
1451
1452 (((
1453 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1454 )))
1455
1456 (((
1457 AT+DEUI: Get or Set the Device EUI
1458 )))
1459
1460 (((
1461 AT+DADDR: Get or Set the Device Address
1462 )))
1463
1464 (((
1465 AT+APPKEY: Get or Set the Application Key
1466 )))
1467
1468 (((
1469 AT+NWKSKEY: Get or Set the Network Session Key
1470 )))
1471
1472 (((
1473 AT+APPSKEY: Get or Set the Application Session Key
1474 )))
1475
1476 (((
1477 AT+APPEUI: Get or Set the Application EUI
1478 )))
1479
1480 (((
1481 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1482 )))
1483
1484 (((
1485 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1486 )))
1487
1488 (((
1489 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1490 )))
1491
1492 (((
1493 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1494 )))
1495
1496 (((
1497 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1498 )))
1499
1500 (((
1501 AT+RX2FQ: Get or Set the Rx2 window frequency
1502 )))
1503
1504 (((
1505 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1506 )))
1507
1508 (((
1509 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1510 )))
1511
1512 (((
1513 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1514 )))
1515
1516 (((
1517 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1518 )))
1519
1520 (((
1521 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1522 )))
1523
1524 (((
1525 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1526 )))
1527
1528 (((
1529 AT+NWKID: Get or Set the Network ID
1530 )))
1531
1532 (((
1533 AT+FCU: Get or Set the Frame Counter Uplink
1534 )))
1535
1536 (((
1537 AT+FCD: Get or Set the Frame Counter Downlink
1538 )))
1539
1540 (((
1541 AT+CLASS: Get or Set the Device Class
1542 )))
1543
1544 (((
1545 AT+JOIN: Join network
1546 )))
1547
1548 (((
1549 AT+NJS: Get OTAA Join Status
1550 )))
1551
1552 (((
1553 AT+SENDB: Send hexadecimal data along with the application port
1554 )))
1555
1556 (((
1557 AT+SEND: Send text data along with the application port
1558 )))
1559
1560 (((
1561 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1562 )))
1563
1564 (((
1565 AT+RECV: Print last received data in raw format
1566 )))
1567
1568 (((
1569 AT+VER: Get current image version and Frequency Band
1570 )))
1571
1572 (((
1573 AT+CFM: Get or Set the confirmation mode (0-1)
1574 )))
1575
1576 (((
1577 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1578 )))
1579
1580 (((
1581 AT+SNR: Get the SNR of the last received packet
1582 )))
1583
1584 (((
1585 AT+RSSI: Get the RSSI of the last received packet
1586 )))
1587
1588 (((
1589 AT+TDC: Get or set the application data transmission interval in ms
1590 )))
1591
1592 (((
1593 AT+PORT: Get or set the application port
1594 )))
1595
1596 (((
1597 AT+DISAT: Disable AT commands
1598 )))
1599
1600 (((
1601 AT+PWORD: Set password, max 9 digits
1602 )))
1603
1604 (((
1605 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1606 )))
1607
1608 (((
1609 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1610 )))
1611
1612 (((
1613 AT+CFG: Print all settings
1614 )))
1615
1616
1617
1618 == 4.2 Common AT Command Sequence ==
1619
1620 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1621
1622 (((
1623
1624
1625 **If device has not joined network yet:**
1626 )))
1627
1628 (((
1629 (% style="background-color:#dcdcdc" %)123456
1630 )))
1631
1632 (((
1633 (% style="background-color:#dcdcdc" %)AT+FDR
1634 )))
1635
1636 (((
1637 (% style="background-color:#dcdcdc" %)123456
1638 )))
1639
1640 (((
1641 (% style="background-color:#dcdcdc" %)AT+NJM=0
1642 )))
1643
1644 (((
1645 (% style="background-color:#dcdcdc" %)ATZ
1646 )))
1647
1648
1649 (((
1650 **If device already joined network:**
1651 )))
1652
1653 (((
1654 (% style="background-color:#dcdcdc" %)AT+NJM=0
1655 )))
1656
1657 (((
1658 (% style="background-color:#dcdcdc" %)ATZ
1659 )))
1660
1661
1662
1663 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1664
1665 (((
1666
1667
1668 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1669 )))
1670
1671 (((
1672 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1673 )))
1674
1675 (((
1676 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1677 )))
1678
1679 (((
1680 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1681 )))
1682
1683 (((
1684 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1685 )))
1686
1687 (((
1688 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1689 )))
1690
1691 (((
1692 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1693 )))
1694
1695 (((
1696 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1697 )))
1698
1699 (((
1700 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1701 )))
1702
1703 (((
1704 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1705 )))
1706
1707 (((
1708 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1709 )))
1710
1711 (((
1712 (% 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.
1713 )))
1714
1715 (((
1716 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1717
1718
1719 )))
1720
1721 (((
1722 (% style="color:red" %)**Note:**
1723 )))
1724
1725 (((
1726 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1727 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1728 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.
1729 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
1730 )))
1731
1732 (((
1733 [[image:1653359097980-169.png||height="188" width="729"]]
1734 )))
1735
1736 (((
1737
1738 )))
1739
1740
1741 === 4.2.3 Change to Class A ===
1742
1743 If sensor JOINED
1744 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1745 ATZ
1746
1747
1748 = 5. FAQ =
1749
1750 == 5.1 How to upgrade the image? ==
1751
1752
1753 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1754
1755 * Support new features
1756 * For bug fix
1757 * Change LoRaWAN bands.
1758
1759 Below shows the hardware connection for how to upload an image to the LT:
1760
1761 [[image:1653359603330-121.png]]
1762
1763
1764 (((
1765 (% 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]].
1766 (% 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/]].
1767 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1768
1769
1770 (% style="color:blue" %)**For LT-22222-L**(%%):
1771 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.
1772 )))
1773
1774 [[image:image-20220524103407-12.png]]
1775
1776 [[image:image-20220524103429-13.png]]
1777
1778 [[image:image-20220524104033-15.png]]
1779
1780
1781 (% 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:
1782
1783 [[image:1653360054704-518.png||height="186" width="745"]]
1784
1785
1786 (((
1787 (((
1788
1789
1790 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1791 )))
1792 )))
1793
1794 (((
1795 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1796 )))
1797
1798 (((
1799
1800
1801 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1802 )))
1803
1804 (((
1805 (((
1806 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1807 )))
1808 )))
1809
1810 (((
1811 (((
1812 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1813
1814
1815 )))
1816 )))
1817
1818 (((
1819 (% 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.
1820 )))
1821
1822 (((
1823 [[image:1653360231087-571.png||height="401" width="727"]]
1824 )))
1825
1826 (((
1827 (% 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.
1828 )))
1829
1830
1831 (((
1832 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1833 )))
1834
1835 (((
1836 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1837 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1838 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1839 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1840 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1841 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1842 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1843 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1844 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1845 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1846 )))
1847
1848
1849 (((
1850 As shown in below:
1851 )))
1852
1853 [[image:1653360498588-932.png||height="485" width="726"]]
1854
1855
1856 == 5.4 Can I see counting event in Serial? ==
1857
1858 (((
1859 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.
1860
1861
1862 == 5.5 Can i use point to point communication for LT-22222-L? ==
1863
1864 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1865
1866
1867 )))
1868
1869 (((
1870 == 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
1871
1872 If the device is not shut down, but directly powered off.
1873
1874 It will default that this is a power-off state.
1875
1876 In modes 2 to 5, DO RO status and pulse count are saved in flash.
1877
1878 After restart, the status before power failure will be read from flash.
1879
1880
1881 = 6. Trouble Shooting =
1882 )))
1883
1884 (((
1885 (((
1886 == 6.1 Downlink doesn’t work, how to solve it? ==
1887 )))
1888 )))
1889
1890 (((
1891 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1892 )))
1893
1894 (((
1895
1896
1897 == 6.2 Have trouble to upload image. ==
1898 )))
1899
1900 (((
1901 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1902 )))
1903
1904 (((
1905
1906
1907 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1908 )))
1909
1910 (((
1911 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1912 )))
1913
1914
1915
1916 = 7. Order Info =
1917
1918
1919 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1920
1921
1922 (% style="color:#4f81bd" %)**XXX:**
1923
1924 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1925 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1926 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1927 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1928 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1929 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1930 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1931 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1932 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1933
1934
1935
1936 = 8. Packing Info =
1937
1938
1939 **Package Includes**:
1940
1941 * LT-22222-L I/O Controller x 1
1942 * Stick Antenna for LoRa RF part x 1
1943 * Bracket for controller x1
1944 * Program cable x 1
1945
1946 **Dimension and weight**:
1947
1948 * Device Size: 13.5 x 7 x 3 cm
1949 * Device Weight: 105g
1950 * Package Size / pcs : 14.5 x 8 x 5 cm
1951 * Weight / pcs : 170g
1952
1953
1954
1955 = 9. Support =
1956
1957 * (((
1958 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.
1959 )))
1960 * (((
1961 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]]
1962
1963
1964
1965
1966 )))
1967
1968 = 10. Reference​​​​​ =
1969
1970 * 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]]
1971 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1972 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1973 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
Copyright ©2010-2024 Dragino Technology Co., LTD. All rights reserved
Dragino Wiki v2.0