Version 82.42 by Xiaoling on 2022/06/25 15:24
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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
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 == 1.4  Applications ==
188
189 * Smart Buildings & Home Automation
190 * Logistics and Supply Chain Management
191 * Smart Metering
192 * Smart Agriculture
193 * Smart Cities
194 * Smart Factory
195
196
197
198
199 == 1.5 Hardware Variants ==
200
201 (% border="1" style="background-color:#f7faff; width:500px" %)
202 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
203 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
204 * 2 x Digital Input (Bi-direction)
205 * 2 x Digital Output
206 * 2 x Relay Output (5A@250VAC / 30VDC)
207 * 2 x 0~~20mA Analog Input (res:0.01mA)
208 * 2 x 0~~30V Analog Input (res:0.01v)
209 * 1 x Counting Port
210 )))
211
212
213 = 2. Power ON Device =
214
215 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.
216
217 (((
218 PWR will on when device is properly powered.
219 )))
220
221 [[image:1653297104069-180.png]]
222
223
224
225 = 3. Operation Mode =
226
227 == 3.1 How it works? ==
228
229 (((
230 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. 
231 )))
232
233 (((
234 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.
235 )))
236
237
238 == 3.2 Example to join LoRaWAN network ==
239
240 (((
241 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. 
242 )))
243
244 [[image:image-20220523172350-1.png||height="266" width="864"]]
245
246
247 (((
248 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:
249 )))
250
251 (((
252 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
253 )))
254
255 (((
256 Each LT is shipped with a sticker with the default device EUI as below:
257 )))
258
259 [[image:1653297924498-393.png]]
260
261
262 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
263
264 Add APP EUI in the application.
265
266 [[image:1653297955910-247.png||height="321" width="716"]]
267
268
269 Add APP KEY and DEV EUI
270
271 [[image:1653298023685-319.png]]
272
273
274 (((
275 (% 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.
276 )))
277
278 [[image:1653298044601-602.png||height="405" width="709"]]
279
280
281
282 == 3.3 Uplink Payload ==
283
284 There are five working modes + one interrupt mode on LT for different type application:
285
286 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
287 * **MOD2**: Double DI Counting + DO + RO
288 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
289 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
290 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
291 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
292
293
294
295
296
297 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
298
299 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
300
301 [[image:image-20220523174024-3.png]]
302
303 (((
304
305
306 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
307 )))
308
309 [[image:image-20220523174254-4.png]]
310
311 * RO is for relay. ROx=1 : close，ROx=0 always open.
312 * DI is for digital input. DIx=1: high or float, DIx=0: low.
313 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
314
315 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
316
317 For example if payload is: [[image:image-20220523175847-2.png]]
318
319
320 **The value for the interface is:  **
321
322 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
323
324 AVI2 channel voltage is 0x04AC/1000=1.196V
325
326 ACI1 channel current is 0x1310/1000=4.880mA
327
328 ACI2 channel current is 0x1300/1000=4.864mA
329
330 The last byte 0xAA= 10101010(B) means
331
332 * [1] RO1 relay channel is close and the RO1 LED is ON.
333 * [0] RO2 relay channel is open and RO2 LED is OFF;
334
335 **LT22222-L:**
336
337 * [1] DI2 channel is high input and DI2 LED is ON;
338 * [0] DI1 channel is low input;
339
340 * [0] DO3 channel output state
341 ** DO3 is float in case no load between DO3 and V+.;
342 ** DO3 is high in case there is load between DO3 and V+.
343 ** DO3 LED is off in both case
344 * [1] DO2 channel output is low and DO2 LED is ON.
345 * [0] DO1 channel output state
346 ** DO1 is float in case no load between DO1 and V+.;
347 ** DO1 is high in case there is load between DO1 and V+.
348 ** DO1 LED is off in both case
349
350
351
352
353
354 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
355
356
357 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
358
359 (((
360 Total : 11 bytes payload
361 )))
362
363 [[image:image-20220523180452-3.png]]
364
365
366 (((
367 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
368 )))
369
370 [[image:image-20220523180506-4.png]]
371
372 * RO is for relay. ROx=1 : close，ROx=0 always open.
373 * FIRST: Indicate this is the first packet after join network.
374 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
375
376 (((
377 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
378 )))
379
380 (((
381
382
383 **To use counting mode, please run:**
384 )))
385
386 (% class="box infomessage" %)
387 (((
388 (((
389 **AT+MOD=2**
390
391 **ATZ**
392 )))
393 )))
394
395 (((
396
397
398 (% style="color:#4f81bd" %)**AT Commands for counting:**
399 )))
400
401 (((
402 **For LT22222-L:**
403
404
405 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
406
407 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
408
409 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
410
411 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
412
413 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
414
415 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
416 )))
417
418
419
420 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
421
422 **LT22222-L**: This mode the DI1 is used as a counting pin.
423
424 [[image:image-20220523181246-5.png]]
425
426 (((
427 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
428 )))
429
430 [[image:image-20220523181301-6.png]]
431
432 * RO is for relay. ROx=1 : close，ROx=0 always open.
433 * FIRST: Indicate this is the first packet after join network.
434 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
435
436 (((
437 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
438 )))
439
440 (((
441 **To use counting mode, please run:**
442 )))
443
444 (% class="box infomessage" %)
445 (((
446 (((
447 **AT+MOD=3**
448
449 **ATZ**
450 )))
451 )))
452
453 (((
454 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
455 )))
456
457
458
459 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
460
461
462 **LT22222-L**: This mode the DI1 is used as a counting pin.
463
464 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.
465
466 [[image:image-20220523181903-8.png]]
467
468
469 (((
470 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
471 )))
472
473 [[image:image-20220523181727-7.png]]
474
475 * RO is for relay. ROx=1 : close，ROx=0 always open.
476 * FIRST: Indicate this is the first packet after join network.
477 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
478
479 (((
480 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
481 )))
482
483 (((
484
485
486 **To use this mode, please run:**
487 )))
488
489 (% class="box infomessage" %)
490 (((
491 (((
492 **AT+MOD=4**
493
494 **ATZ**
495 )))
496 )))
497
498
499
500 (((
501 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
502 )))
503
504 (((
505
506
507 **Plus below command for AVI1 Counting:**
508
509
510 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
511
512 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
513
514 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
515
516 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
517 )))
518
519
520
521 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
522
523
524 **LT22222-L**: This mode the DI1 is used as a counting pin.
525
526 [[image:image-20220523182334-9.png]]
527
528 (((
529
530
531 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
532 )))
533
534 * RO is for relay. ROx=1 : close，ROx=0 always open.
535 * FIRST: Indicate this is the first packet after join network.
536 * (((
537 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
538 )))
539
540 (((
541 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
542 )))
543
544 (((
545
546
547 **To use this mode, please run:**
548 )))
549
550 (% class="box infomessage" %)
551 (((
552 (((
553 **AT+MOD=5**
554
555 **ATZ**
556 )))
557 )))
558
559 (((
560 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
561 )))
562
563
564
565 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
566
567
568 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
569
570 For example, if user has configured below commands:
571
572 * **AT+MOD=1 ** **~-~->** The normal working mode
573 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
574
575 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
576
577 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
578 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.**
579
580 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
581
582 (% style="color:#4f81bd" %)**Trigger base on voltage**:
583
584 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
585
586 **Example:**
587
588 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)
589
590 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
591
592
593
594 (% style="color:#4f81bd" %)**Trigger base on current**:
595
596 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
597
598 **Example:**
599
600 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
601
602
603
604 (% style="color:#4f81bd" %)**Trigger base on DI status**:
605
606 DI status trigger Flag.
607
608 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
609
610
611 **Example:**
612
613 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
614
615
616 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
617
618 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
619
620 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
621
622 AA: Code for this downlink Command:
623
624 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
625
626 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
627
628 yy2 yy2: AC1 or AV1 high limit.
629
630 yy3 yy3: AC2 or AV2 low limit.
631
632 Yy4 yy4: AC2 or AV2 high limit.
633
634
635 **Example1**: AA 00 13 88 00 00 00 00 00 00
636
637 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
638
639
640 **Example2**: AA 02 01 00
641
642 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
643
644
645
646 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
647
648 MOD6 Payload : total 11 bytes payload
649
650 [[image:image-20220524085923-1.png]]
651
652
653 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
654
655 [[image:image-20220524090106-2.png]]
656
657 * Each bits shows if the corresponding trigger has been configured.
658
659 **Example:**
660
661 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
662
663
664 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
665
666 [[image:image-20220524090249-3.png]]
667
668 * Each bits shows which status has been trigger on this uplink.
669
670 **Example:**
671
672 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
673
674
675 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
676
677 [[image:image-20220524090456-4.png]]
678
679 * Each bits shows which status has been trigger on this uplink.
680
681 **Example:**
682
683 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
684
685 00000101: Means both DI1 and DI2 trigger are enabled.
686
687
688 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
689
690 Downlink command to poll MOD6 status:
691
692 **AB 06**
693
694 When device got this command, it will send the MOD6 payload.
695
696
697
698 === 3.3.7 Payload Decoder ===
699
700 (((
701
702
703 **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/]]
704
705
706 )))
707
708
709 == 3.4 ​Configure LT via AT or Downlink ==
710
711 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
712
713 (((
714 There are two kinds of Commands:
715 )))
716
717 * (% 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]]
718
719 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
720
721
722
723
724
725 === 3.4.1 Common Commands ===
726
727 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]]
728
729
730
731 === 3.4.2 Sensor related commands ===
732
733 ==== 3.4.2.1 Set Transmit Interval ====
734
735 Set device uplink interval.
736
737 * (% style="color:#037691" %)**AT Command:**
738
739 **AT+TDC=N **
740
741
742 **Example: **AT+TDC=30000. Means set interval to 30 seconds
743
744
745 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
746
747 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
748
749
750
751
752 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
753
754 Set work mode.
755
756 * (% style="color:#037691" %)**AT Command:**
757
758 **AT+MOD=N  **
759
760
761 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
762
763
764 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
765
766 **0x0A aa    ** ~/~/ Same as AT+MOD=aa
767
768
769
770
771 ==== 3.4.2.3 Poll an uplink ====
772
773 * (% style="color:#037691" %)**AT Command:**
774
775 There is no AT Command to poll uplink
776
777
778 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
779
780 **0x08 FF     **~/~/ Poll an uplink
781
782 **Example**: 0x08FF, ask device to send an Uplink
783
784
785
786 ==== 3.4.2.4 Enable Trigger Mode ====
787
788 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
789
790 * (% style="color:#037691" %)**AT Command:**
791
792 **AT+ADDMOD6=1 or 0**
793
794 1: Enable Trigger Mode
795
796 0: Disable Trigger Mode
797
798
799 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
800
801 **0x0A 06 aa    ** ~/~/ Same as AT+ADDMOD6=aa
802
803
804
805
806 ==== 3.4.2.5 Poll trigger settings ====
807
808 Poll trigger settings,
809
810 * (% style="color:#037691" %)**AT Command:**
811
812 There is no AT Command for this feature.
813
814
815 * (% style="color:#037691" %)**Downlink Payload (prefix 0x AB 06):**
816
817 **0xAB 06         **~/~/ Poll trigger settings, device will uplink trigger settings once receive this command
818
819
820
821
822 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
823
824 Enable Disable DI1/DI2/DI2 as trigger,
825
826 * (% style="color:#037691" %)**AT Command:**
827
828 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
829
830
831 **Example:**
832
833 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
834
835 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 02):**
836
837 **0xAA 02 aa bb        **~/~/ Same as AT+DTRI=aa,bb
838
839
840
841
842 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
843
844 Set DI1 or DI3(for LT-33222-L) trigger.
845
846 * (% style="color:#037691" %)**AT Command:**
847
848 **AT+TRIG1=a,b**
849
850 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
851
852 b : delay timing.
853
854
855 **Example:**
856
857 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
858
859
860 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
861 * **0x09 01 aa bb cc    ** ~/~/ same as AT+TRIG1=aa,0x(bb cc)
862
863
864 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
865
866 Set DI2 trigger.
867
868 * (% style="color:#037691" %)**AT Command:**
869
870 **AT+TRIG2=a,b**
871
872
873 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
874
875 b : delay timing.
876
877
878 **Example:**
879
880 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
881
882
883 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
884
885 **0x09 02 aa bb cc           **~/~/ same as AT+TRIG1=aa,0x(bb cc)
886
887
888
889
890 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
891
892 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
893
894 * (% style="color:#037691" %)**AT Command**
895
896 **AT+ACLIM**
897
898
899 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
900
901 **0x AA 01 aa bb cc dd ee ff gg hh        ** ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
902
903
904
905
906 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
907
908 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
909
910 * (% style="color:#037691" %)**AT Command**
911
912 **AT+AVLIM  See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
913
914
915 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
916
917 **0x AA 00 aa bb cc dd ee ff gg hh    ** ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
918
919
920
921
922 ==== 3.4.2.11 Trigger – Set minimum interval ====
923
924 Set AV and AC trigger minimum interval, system won't response to the second trigger within this set time after the first trigger.
925
926 * (% style="color:#037691" %)**AT Command**
927
928 **AT+ATDC=5        ** Device won't response the second trigger within 5 minute after the first trigger.
929
930
931 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
932
933 **0x AC aa bb   ** ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
934
935
936
937
938 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
939
940 * (% style="color:#037691" %)**AT Command**
941
942 There is no AT Command to control Digital Output
943
944
945 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
946 * **0x02 aa bb cc     **~/~/ Set DO1/DO2/DO3 output
947
948 (((
949 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
950 )))
951
952 (((
953 01: Low,  00: High ,  11: No action
954 )))
955
956 [[image:image-20220524092754-5.png]]
957
958 (((
959 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
960 )))
961
962 (((
963 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
964 )))
965
966
967
968
969 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
970
971 * (% style="color:#037691" %)**AT Command**
972
973 There is no AT Command to control Digital Output
974
975
976 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
977
978 **0xA9 aa bb cc     **~/~/ Set DO1/DO2/DO3 output with time control
979
980
981 This is to control the digital output time of DO pin. Include four bytes:
982
983 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
984
985 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
986
987 01: DO pins will change back to original state after timeout.
988
989 00: DO pins will change to an inverter state after timeout 
990
991
992 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
993
994 [[image:image-20220524093238-6.png]]
995
996
997 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
998
999 [[image:image-20220524093328-7.png]]
1000
1001
1002 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1003
1004 [[image:image-20220524093351-8.png]]
1005
1006
1007 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1008
1009 Latching time. Unit: ms
1010
1011 Device will upload a packet if downlink code executes successfully.
1012
1013
1014 **Example payload:**
1015
1016 **~1. A9 01 01 01 01 07 D0**
1017
1018 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1019
1020 **2. A9 01 00 01 11 07 D0**
1021
1022 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1023
1024 **3. A9 00 00 00 00 07 D0**
1025
1026 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1027
1028 **4. A9 00 11 01 00 07 D0**
1029
1030 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
1031
1032
1033
1034
1035 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1036
1037 * (% style="color:#037691" %)**AT Command:**
1038
1039 There is no AT Command to control Relay Output
1040
1041
1042 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1043
1044 **0x03 aa bb     **~/~/ Set RO1/RO2 output
1045
1046
1047 (((
1048 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1049 )))
1050
1051 (((
1052 01: Close ,  00: Open , 11: No action
1053 )))
1054
1055 (((
1056 [[image:image-20220524093724-9.png]]
1057 )))
1058
1059 Device will upload a packet if downlink code executes successfully.
1060
1061
1062
1063
1064 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1065
1066 * (% style="color:#037691" %)**AT Command:**
1067
1068 There is no AT Command to control Relay Output
1069
1070
1071 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1072
1073 **0x05 aa bb cc dd     **~/~/ Set RO1/RO2 relay with time control
1074
1075
1076 This is to control the relay output time of relay. Include four bytes:
1077
1078 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1079
1080 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1081
1082 01: Relays will change back to original state after timeout.
1083
1084 00: Relays will change to an inverter state after timeout
1085
1086
1087 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1088
1089 [[image:image-20220524093831-10.png]]
1090
1091
1092 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1093
1094 Device will upload a packet if downlink code executes successfully.
1095
1096
1097 **Example payload:**
1098
1099 **~1. 05 01 11 07 D0**
1100
1101 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1102
1103 **2. 05 01 10 07 D0**
1104
1105 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1106
1107 **3. 05 00 01 07 D0**
1108
1109 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1110
1111 **4. 05 00 00 07 D0**
1112
1113 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1114
1115
1116
1117
1118 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1119
1120 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1121
1122 * (% style="color:#037691" %)**AT Command:**
1123
1124 **AT+VOLMAX   ** ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1125
1126
1127 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1128
1129 **0xA5 aa bb cc   **~/~/ Same as AT+VOLMAX=(aa bb),cc
1130
1131
1132
1133
1134 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1135
1136 * (% style="color:#037691" %)**AT Command:**
1137
1138 **AT+SETCNT=aa,(bb cc dd ee) **
1139
1140 aa: 1: Set count1,
1141
1142 2: Set count2,
1143
1144 3: Set AV1 count
1145
1146 Bb cc dd ee: number to be set
1147
1148
1149 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1150
1151 **0x A8 aa bb cc dd ee     **~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1152
1153
1154
1155
1156 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1157
1158 Clear counting for counting mode
1159
1160 * (% style="color:#037691" %)**AT Command:**
1161
1162 **AT+CLRCOUNT ** ~/~/ clear all counting
1163
1164
1165 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1166
1167 **0x A6 01    ** ~/~/ clear all counting
1168
1169
1170
1171
1172 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1173
1174 * (% style="color:#037691" %)**AT Command:**
1175
1176 **AT+COUTIME=60  **~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1177
1178
1179 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1180
1181 **0x A7 aa bb cc     **~/~/ same as AT+COUTIME =aa bb cc,
1182
1183 (((
1184 range: aa bb cc:0 to 16777215,  (unit:second)
1185
1186
1187 )))
1188
1189
1190
1191 == 3.5 Integrate with Mydevice ==
1192
1193 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:
1194
1195 (((
1196 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1197 )))
1198
1199 (((
1200 (% 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:
1201 )))
1202
1203 [[image:1653356737703-362.png||height="232" width="732"]]
1204
1205 [[image:image-20220524094641-11.png||height="390" width="723"]]
1206
1207
1208 [[image:image-20220524094641-12.png||height="402" width="718"]]
1209
1210
1211 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1212
1213 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1214
1215 Search under The things network
1216
1217 [[image:1653356838789-523.png||height="337" width="740"]]
1218
1219
1220
1221 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1222
1223 [[image:image-20220524094909-1.png||height="335" width="729"]]
1224
1225
1226 [[image:image-20220524094909-2.png||height="337" width="729"]]
1227
1228
1229 [[image:image-20220524094909-3.png||height="338" width="727"]]
1230
1231
1232 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1233
1234
1235 [[image:image-20220524094909-5.png||height="341" width="734"]]
1236
1237
1238
1239 == 3.6 Interface Detail ==
1240
1241 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1242
1243 Support NPN Type sensor
1244
1245 [[image:1653356991268-289.png]]
1246
1247
1248
1249 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1250
1251 (((
1252 The DI port of LT-22222-L can support NPN or PNP output sensor.
1253 )))
1254
1255 (((
1256 (((
1257 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
1258 )))
1259 )))
1260
1261 [[image:1653357170703-587.png]]
1262
1263 (((
1264 (((
1265 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1266 )))
1267 )))
1268
1269 (((
1270
1271 )))
1272
1273 (((
1274 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1275 )))
1276
1277 (((
1278 This type of sensor will output a low signal GND when active.
1279 )))
1280
1281 * (((
1282 Connect sensor’s output to DI1-
1283 )))
1284 * (((
1285 Connect sensor’s VCC to DI1+.
1286 )))
1287
1288 (((
1289 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1290 )))
1291
1292 (((
1293 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1294 )))
1295
1296 (((
1297 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.
1298 )))
1299
1300 (((
1301
1302 )))
1303
1304 (((
1305 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1306 )))
1307
1308 (((
1309 This type of sensor will output a high signal (example 24v) when active.
1310 )))
1311
1312 * (((
1313 Connect sensor’s output to DI1+
1314 )))
1315 * (((
1316 Connect sensor’s GND DI1-.
1317 )))
1318
1319 (((
1320 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1321 )))
1322
1323 (((
1324 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1325 )))
1326
1327 (((
1328 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.
1329 )))
1330
1331 (((
1332
1333 )))
1334
1335 (((
1336 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1337 )))
1338
1339 (((
1340 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1341 )))
1342
1343 * (((
1344 Connect sensor’s output to DI1+ with a serial 50K resistor
1345 )))
1346 * (((
1347 Connect sensor’s GND DI1-.
1348 )))
1349
1350 (((
1351 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1352 )))
1353
1354 (((
1355 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1356 )))
1357
1358 (((
1359 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.
1360 )))
1361
1362
1363
1364 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1365
1366 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1367
1368 [[image:1653357531600-905.png]]
1369
1370
1371
1372 === 3.6.4 Analog Input Interface ===
1373
1374 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:
1375
1376
1377 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1378
1379 [[image:1653357592296-182.png]]
1380
1381 Example to connect a 4~~20mA sensor
1382
1383 We take the wind speed sensor as an example for reference only.
1384
1385
1386 **Specifications of the wind speed sensor:**
1387
1388 Red:  12~~24v
1389
1390 Yellow:  4~~20mA
1391
1392 Black:  GND
1393
1394
1395 **Connection diagram:**
1396
1397 [[image:1653357640609-758.png]]
1398
1399 [[image:1653357648330-671.png||height="155" width="733"]]
1400
1401
1402
1403 === 3.6.5 Relay Output ===
1404
1405 (((
1406 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:
1407 )))
1408
1409 [[image:image-20220524100215-9.png]]
1410
1411 [[image:image-20220524100215-10.png||height="382" width="723"]]
1412
1413
1414
1415 == 3.7 LEDs Indicators ==
1416
1417 [[image:image-20220524100748-11.png]]
1418
1419
1420
1421 = 4. Use AT Command =
1422
1423 == 4.1 Access AT Command ==
1424
1425 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.
1426
1427 [[image:1653358238933-385.png]]
1428
1429
1430 (((
1431 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:
1432 )))
1433
1434 [[image:1653358355238-883.png]]
1435
1436
1437 (((
1438 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/]]
1439 )))
1440
1441 (((
1442 AT+<CMD>?        : Help on <CMD>
1443 )))
1444
1445 (((
1446 AT+<CMD>         : Run <CMD>
1447 )))
1448
1449 (((
1450 AT+<CMD>=<value> : Set the value
1451 )))
1452
1453 (((
1454 AT+<CMD>=?       : Get the value
1455 )))
1456
1457 (((
1458 ATZ: Trig a reset of the MCU
1459 )))
1460
1461 (((
1462 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1463 )))
1464
1465 (((
1466 AT+DEUI: Get or Set the Device EUI
1467 )))
1468
1469 (((
1470 AT+DADDR: Get or Set the Device Address
1471 )))
1472
1473 (((
1474 AT+APPKEY: Get or Set the Application Key
1475 )))
1476
1477 (((
1478 AT+NWKSKEY: Get or Set the Network Session Key
1479 )))
1480
1481 (((
1482 AT+APPSKEY: Get or Set the Application Session Key
1483 )))
1484
1485 (((
1486 AT+APPEUI: Get or Set the Application EUI
1487 )))
1488
1489 (((
1490 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1491 )))
1492
1493 (((
1494 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1495 )))
1496
1497 (((
1498 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1499 )))
1500
1501 (((
1502 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1503 )))
1504
1505 (((
1506 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1507 )))
1508
1509 (((
1510 AT+RX2FQ: Get or Set the Rx2 window frequency
1511 )))
1512
1513 (((
1514 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1515 )))
1516
1517 (((
1518 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1519 )))
1520
1521 (((
1522 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1523 )))
1524
1525 (((
1526 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1527 )))
1528
1529 (((
1530 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1531 )))
1532
1533 (((
1534 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1535 )))
1536
1537 (((
1538 AT+NWKID: Get or Set the Network ID
1539 )))
1540
1541 (((
1542 AT+FCU: Get or Set the Frame Counter Uplink
1543 )))
1544
1545 (((
1546 AT+FCD: Get or Set the Frame Counter Downlink
1547 )))
1548
1549 (((
1550 AT+CLASS: Get or Set the Device Class
1551 )))
1552
1553 (((
1554 AT+JOIN: Join network
1555 )))
1556
1557 (((
1558 AT+NJS: Get OTAA Join Status
1559 )))
1560
1561 (((
1562 AT+SENDB: Send hexadecimal data along with the application port
1563 )))
1564
1565 (((
1566 AT+SEND: Send text data along with the application port
1567 )))
1568
1569 (((
1570 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1571 )))
1572
1573 (((
1574 AT+RECV: Print last received data in raw format
1575 )))
1576
1577 (((
1578 AT+VER: Get current image version and Frequency Band
1579 )))
1580
1581 (((
1582 AT+CFM: Get or Set the confirmation mode (0-1)
1583 )))
1584
1585 (((
1586 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1587 )))
1588
1589 (((
1590 AT+SNR: Get the SNR of the last received packet
1591 )))
1592
1593 (((
1594 AT+RSSI: Get the RSSI of the last received packet
1595 )))
1596
1597 (((
1598 AT+TDC: Get or set the application data transmission interval in ms
1599 )))
1600
1601 (((
1602 AT+PORT: Get or set the application port
1603 )))
1604
1605 (((
1606 AT+DISAT: Disable AT commands
1607 )))
1608
1609 (((
1610 AT+PWORD: Set password, max 9 digits
1611 )))
1612
1613 (((
1614 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1615 )))
1616
1617 (((
1618 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1619 )))
1620
1621 (((
1622 AT+CFG: Print all settings
1623 )))
1624
1625
1626
1627 == 4.2 Common AT Command Sequence ==
1628
1629 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1630
1631 (((
1632
1633
1634 **If device has not joined network yet:**
1635 )))
1636
1637 (((
1638 (% style="background-color:#dcdcdc" %)123456
1639 )))
1640
1641 (((
1642 (% style="background-color:#dcdcdc" %)AT+FDR
1643 )))
1644
1645 (((
1646 (% style="background-color:#dcdcdc" %)123456
1647 )))
1648
1649 (((
1650 (% style="background-color:#dcdcdc" %)AT+NJM=0
1651 )))
1652
1653 (((
1654 (% style="background-color:#dcdcdc" %)ATZ
1655 )))
1656
1657
1658 (((
1659 **If device already joined network:**
1660 )))
1661
1662 (((
1663 (% style="background-color:#dcdcdc" %)AT+NJM=0
1664 )))
1665
1666 (((
1667 (% style="background-color:#dcdcdc" %)ATZ
1668 )))
1669
1670
1671
1672 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1673
1674 (((
1675
1676
1677 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1678 )))
1679
1680 (((
1681 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1682 )))
1683
1684 (((
1685 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1686 )))
1687
1688 (((
1689 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1690 )))
1691
1692 (((
1693 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1694 )))
1695
1696 (((
1697 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1698 )))
1699
1700 (((
1701 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1702 )))
1703
1704 (((
1705 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1706 )))
1707
1708 (((
1709 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1710 )))
1711
1712 (((
1713 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1714 )))
1715
1716 (((
1717 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1718 )))
1719
1720 (((
1721 (% 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.
1722 )))
1723
1724 (((
1725 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1726
1727
1728 )))
1729
1730 (((
1731 (% style="color:red" %)**Note:**
1732 )))
1733
1734 (((
1735 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1736 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1737 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.
1738 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
1739 )))
1740
1741 (((
1742 [[image:1653359097980-169.png||height="188" width="729"]]
1743 )))
1744
1745 (((
1746
1747 )))
1748
1749
1750 === 4.2.3 Change to Class A ===
1751
1752 If sensor JOINED
1753 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1754 ATZ
1755
1756
1757 = 5. FAQ =
1758
1759 == 5.1 How to upgrade the image? ==
1760
1761
1762 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1763
1764 * Support new features
1765 * For bug fix
1766 * Change LoRaWAN bands.
1767
1768 Below shows the hardware connection for how to upload an image to the LT:
1769
1770 [[image:1653359603330-121.png]]
1771
1772
1773 (((
1774 (% 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]].
1775 (% 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/]].
1776 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1777
1778
1779 (% style="color:blue" %)**For LT-22222-L**(%%):
1780 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.
1781 )))
1782
1783 [[image:image-20220524103407-12.png]]
1784
1785 [[image:image-20220524103429-13.png]]
1786
1787 [[image:image-20220524104033-15.png]]
1788
1789
1790 (% 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:
1791
1792 [[image:1653360054704-518.png||height="186" width="745"]]
1793
1794
1795 (((
1796 (((
1797
1798
1799 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1800 )))
1801 )))
1802
1803 (((
1804 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1805 )))
1806
1807 (((
1808
1809
1810 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1811 )))
1812
1813 (((
1814 (((
1815 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1816 )))
1817 )))
1818
1819 (((
1820 (((
1821 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1822
1823
1824 )))
1825 )))
1826
1827 (((
1828 (% 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.
1829 )))
1830
1831 (((
1832 [[image:1653360231087-571.png||height="401" width="727"]]
1833 )))
1834
1835 (((
1836 (% 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.
1837 )))
1838
1839
1840 (((
1841 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1842 )))
1843
1844 (((
1845 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1846 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1847 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1848 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1849 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1850 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1851 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1852 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1853 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1854 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1855 )))
1856
1857
1858 (((
1859 As shown in below:
1860 )))
1861
1862 [[image:1653360498588-932.png||height="485" width="726"]]
1863
1864
1865 == 5.4 Can I see counting event in Serial? ==
1866
1867 (((
1868 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.
1869
1870
1871 == 5.5 Can i use point to point communication for LT-22222-L? ==
1872
1873 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1874
1875
1876 )))
1877
1878 (((
1879 == 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
1880
1881 If the device is not shut down, but directly powered off.
1882
1883 It will default that this is a power-off state.
1884
1885 In modes 2 to 5, DO RO status and pulse count are saved in flash.
1886
1887 After restart, the status before power failure will be read from flash.
1888
1889
1890 = 6. Trouble Shooting =
1891 )))
1892
1893 (((
1894 (((
1895 == 6.1 Downlink doesn’t work, how to solve it? ==
1896 )))
1897 )))
1898
1899 (((
1900 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1901 )))
1902
1903 (((
1904
1905
1906 == 6.2 Have trouble to upload image. ==
1907 )))
1908
1909 (((
1910 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1911 )))
1912
1913 (((
1914
1915
1916 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1917 )))
1918
1919 (((
1920 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1921 )))
1922
1923
1924 = 7. Order Info =
1925
1926 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1927
1928
1929 (% style="color:#4f81bd" %)**XXX:**
1930
1931 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1932 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1933 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1934 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1935 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1936 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1937 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1938 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1939 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1940
1941
1942 = 8. Packing Info =
1943
1944
1945 **Package Includes**:
1946
1947 * LT-22222-L I/O Controller x 1
1948 * Stick Antenna for LoRa RF part x 1
1949 * Bracket for controller x1
1950 * Program cable x 1
1951
1952 **Dimension and weight**:
1953
1954 * Device Size: 13.5 x 7 x 3 cm
1955 * Device Weight: 105g
1956 * Package Size / pcs : 14.5 x 8 x 5 cm
1957 * Weight / pcs : 170g
1958
1959
1960 = 9. Support =
1961
1962 * (((
1963 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.
1964 )))
1965 * (((
1966 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]]
1967
1968
1969
1970
1971 )))
1972
1973 = 10. Reference​​​​​ =
1974
1975 * 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]]
1976 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1977 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1978 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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