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Version 82.14 by Xiaoling on 2022/06/20 11:47
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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 == 1.4  Applications ==
187
188 * Smart Buildings & Home Automation
189 * Logistics and Supply Chain Management
190 * Smart Metering
191 * Smart Agriculture
192 * Smart Cities
193 * Smart Factory
194
195
196
197 == 1.5 Hardware Variants ==
198
199 (% border="1" style="background-color:#f7faff; width:500px" %)
200 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
201 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
202 * 2 x Digital Input (Bi-direction)
203 * 2 x Digital Output
204 * 2 x Relay Output (5A@250VAC / 30VDC)
205 * 2 x 0~~20mA Analog Input (res:0.01mA)
206 * 2 x 0~~30V Analog Input (res:0.01v)
207 * 1 x Counting Port
208 )))
209
210
211 = 2. Power ON Device =
212
213 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.
214
215 (((
216 PWR will on when device is properly powered.
217 )))
218
219 [[image:1653297104069-180.png]]
220
221
222
223 = 3. Operation Mode =
224
225 == 3.1 How it works? ==
226
227 (((
228 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. 
229 )))
230
231 (((
232 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.
233 )))
234
235
236 == 3.2 Example to join LoRaWAN network ==
237
238 (((
239 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. 
240 )))
241
242 [[image:image-20220523172350-1.png||height="266" width="864"]]
243
244
245 (((
246 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:
247 )))
248
249 (((
250 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
251 )))
252
253 (((
254 Each LT is shipped with a sticker with the default device EUI as below:
255 )))
256
257 [[image:1653297924498-393.png]]
258
259
260 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
261
262 Add APP EUI in the application.
263
264 [[image:1653297955910-247.png||height="321" width="716"]]
265
266
267 Add APP KEY and DEV EUI
268
269 [[image:1653298023685-319.png]]
270
271
272 (((
273 (% 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.
274 )))
275
276 [[image:1653298044601-602.png||height="405" width="709"]]
277
278
279
280 == 3.3 Uplink Payload ==
281
282 There are five working modes + one interrupt mode on LT for different type application:
283
284 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
285 * **MOD2**: Double DI Counting + DO + RO
286 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
287 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
288 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
289 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
290
291
292
293 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
294
295 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
296
297 [[image:image-20220523174024-3.png]]
298
299 (((
300
301
302 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
303 )))
304
305 [[image:image-20220523174254-4.png]]
306
307 * RO is for relay. ROx=1 : close，ROx=0 always open.
308 * DI is for digital input. DIx=1: high or float, DIx=0: low.
309 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
310
311 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
312
313 For example if payload is: [[image:image-20220523175847-2.png]]
314
315
316 **The value for the interface is:  **
317
318 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
319
320 AVI2 channel voltage is 0x04AC/1000=1.196V
321
322 ACI1 channel current is 0x1310/1000=4.880mA
323
324 ACI2 channel current is 0x1300/1000=4.864mA
325
326 The last byte 0xAA= 10101010(B) means
327
328 * [1] RO1 relay channel is close and the RO1 LED is ON.
329 * [0] RO2 relay channel is open and RO2 LED is OFF;
330
331 **LT22222-L:**
332
333 * [1] DI2 channel is high input and DI2 LED is ON;
334 * [0] DI1 channel is low input;
335
336 * [0] DO3 channel output state
337 ** DO3 is float in case no load between DO3 and V+.;
338 ** DO3 is high in case there is load between DO3 and V+.
339 ** DO3 LED is off in both case
340 * [1] DO2 channel output is low and DO2 LED is ON.
341 * [0] DO1 channel output state
342 ** DO1 is float in case no load between DO1 and V+.;
343 ** DO1 is high in case there is load between DO1 and V+.
344 ** DO1 LED is off in both case
345
346
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 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
403
404 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
405
406 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
407
408 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
409
410 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
411
412 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
413 )))
414 )))
415
416
417
418 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
419
420 **LT22222-L**: This mode the DI1 is used as a counting pin.
421
422 [[image:image-20220523181246-5.png]]
423
424 (((
425 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
426 )))
427
428 [[image:image-20220523181301-6.png]]
429
430 * RO is for relay. ROx=1 : close，ROx=0 always open.
431 * FIRST: Indicate this is the first packet after join network.
432 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
433
434 (((
435 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
436 )))
437
438 (((
439 **To use counting mode, please run:**
440 )))
441
442 (% class="box infomessage" %)
443 (((
444 (((
445 **AT+MOD=3**
446
447 **ATZ**
448 )))
449 )))
450
451 (((
452 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
453 )))
454
455
456
457 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
458
459
460 **LT22222-L**: This mode the DI1 is used as a counting pin.
461
462 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.
463
464 [[image:image-20220523181903-8.png]]
465
466
467 (((
468 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
469 )))
470
471 [[image:image-20220523181727-7.png]]
472
473 * RO is for relay. ROx=1 : close，ROx=0 always open.
474 * FIRST: Indicate this is the first packet after join network.
475 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
476
477 (((
478 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
479 )))
480
481 (((
482
483
484 **To use this mode, please run:**
485 )))
486
487 (% class="box infomessage" %)
488 (((
489 (((
490 **AT+MOD=4**
491
492 **ATZ**
493 )))
494 )))
495
496
497
498 (((
499 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
500 )))
501
502 (((
503
504
505 **Plus below command for AVI1 Counting:**
506 )))
507
508 (% class="box infomessage" %)
509 (((
510 (((
511 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**   (set AVI Count to 60)**
512
513 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
514
515 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
516
517 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
518 )))
519 )))
520
521
522 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
523
524
525 **LT22222-L**: This mode the DI1 is used as a counting pin.
526
527 [[image:image-20220523182334-9.png]]
528
529 (((
530
531
532 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
533 )))
534
535 * RO is for relay. ROx=1 : close，ROx=0 always open.
536 * FIRST: Indicate this is the first packet after join network.
537 * (((
538 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
539 )))
540
541 (((
542 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
543 )))
544
545 (((
546
547
548 **To use this mode, please run:**
549 )))
550
551 (% class="box infomessage" %)
552 (((
553 (((
554 **AT+MOD=5**
555
556 **ATZ**
557 )))
558 )))
559
560 (((
561 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
562 )))
563
564
565
566 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
567
568
569 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
570
571 For example, if user has configured below commands:
572
573 * **AT+MOD=1 ** **~-~->** The normal working mode
574 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
575
576 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
577
578 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
579 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.**
580
581 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
582
583 (% style="color:#4f81bd" %)**Trigger base on voltage**:
584
585 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
586
587 **Example:**
588
589 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)
590
591 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
592
593
594
595 (% style="color:#4f81bd" %)**Trigger base on current**:
596
597 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
598
599 **Example:**
600
601 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
602
603
604
605 (% style="color:#4f81bd" %)**Trigger base on DI status**:
606
607 DI status trigger Flag.
608
609 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
610
611
612 **Example:**
613
614 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
615
616
617 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
618
619 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
620
621 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
622
623 AA: Code for this downlink Command:
624
625 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
626
627 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
628
629 yy2 yy2: AC1 or AV1 high limit.
630
631 yy3 yy3: AC2 or AV2 low limit.
632
633 Yy4 yy4: AC2 or AV2 high limit.
634
635
636 **Example1**: AA 00 13 88 00 00 00 00 00 00
637
638 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
639
640
641 **Example2**: AA 02 01 00
642
643 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
644
645
646
647 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
648
649 MOD6 Payload : total 11 bytes payload
650
651 [[image:image-20220524085923-1.png]]
652
653
654 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
655
656 [[image:image-20220524090106-2.png]]
657
658 * Each bits shows if the corresponding trigger has been configured.
659
660 **Example:**
661
662 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
663
664
665 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
666
667 [[image:image-20220524090249-3.png]]
668
669 * Each bits shows which status has been trigger on this uplink.
670
671 **Example:**
672
673 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
674
675
676 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
677
678 [[image:image-20220524090456-4.png]]
679
680 * Each bits shows which status has been trigger on this uplink.
681
682 **Example:**
683
684 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
685
686 00000101: Means both DI1 and DI2 trigger are enabled.
687
688
689 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
690
691 Downlink command to poll MOD6 status:
692
693 **AB 06**
694
695 When device got this command, it will send the MOD6 payload.
696
697
698
699 === 3.3.7 Payload Decoder ===
700
701 (((
702
703
704 **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/]]
705
706
707 )))
708
709
710 == 3.4 ​Configure LT via AT or Downlink ==
711
712 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
713
714 (((
715 There are two kinds of Commands:
716 )))
717
718 * (% 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]]
719
720 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
721
722
723
724 === 3.4.1 Common Commands ===
725
726 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]]
727
728
729
730 === 3.4.2 Sensor related commands ===
731
732 ==== 3.4.2.1 Set Transmit Interval ====
733
734 Set device uplink interval.
735
736 * (% style="color:#037691" %)**AT Command:**
737
738 (% class="box infomessage" %)
739 (((
740 **AT+TDC=N **
741 )))
742
743 **Example: **AT+TDC=30000. Means set interval to 30 seconds
744
745
746 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
747
748 (% class="box infomessage" %)
749 (((
750 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
751 )))
752
753
754
755 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
756
757 Set work mode.
758
759 * (% style="color:#037691" %)**AT Command:**
760
761 (% class="box infomessage" %)
762 (((
763 **AT+MOD=N  **
764 )))
765
766 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
767
768
769 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
770
771 (% class="box infomessage" %)
772 (((
773 **0x0A aa     ~/~/ Same as AT+MOD=aa**
774 )))
775
776
777
778 ==== 3.4.2.3 Poll an uplink ====
779
780 * (% style="color:#037691" %)AT Command:
781
782 There is no AT Command to poll uplink
783
784
785 * (% style="color:#037691" %)Downlink Payload (prefix 0x08):
786
787 (% class="box infomessage" %)
788 (((
789 **0x08 FF     ~/~/ Poll an uplink,**
790 )))
791
792 **Example**: 0x08FF, ask device to send an Uplink
793
794
795
796 ==== 3.4.2.4 Enable Trigger Mode ====
797
798 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
799
800 * (% style="color:#037691" %)AT Command:
801
802 (% class="box infomessage" %)
803 (((
804 **AT+ADDMOD6=1 or 0**
805 )))
806
807 1: Enable Trigger Mode
808
809 0: Disable Trigger Mode
810
811
812 * (% style="color:#037691" %)Downlink Payload (prefix 0x0A 06):
813
814 (% class="box infomessage" %)
815 (((
816 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
817 )))
818
819
820
821 ==== 3.4.2.5 Poll trigger settings ====
822
823 Poll trigger settings,
824
825 * (% style="color:#037691" %)AT Command:
826
827 There is no AT Command for this feature.
828
829
830 * (% style="color:#037691" %)Downlink Payload (prefix 0x AB 06):
831
832 (% class="box infomessage" %)
833 (((
834 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
835 )))
836
837
838
839 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
840
841 Enable Disable DI1/DI2/DI2 as trigger,
842
843 * (% style="color:#037691" %)AT Command:
844
845 (% class="box infomessage" %)
846 (((
847 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
848 )))
849
850
851 **Example:**
852
853 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
854
855 * (% style="color:#037691" %)Downlink Payload (prefix 0xAA 02):
856
857 (% class="box infomessage" %)
858 (((
859 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
860 )))
861
862
863
864 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
865
866 Set DI1 or DI3(for LT-33222-L) trigger.
867
868 * (% style="color:#037691" %)AT Command:
869
870 (% class="box infomessage" %)
871 (((
872 **AT+TRIG1=a,b**
873 )))
874
875 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
876
877 b : delay timing.
878
879
880 **Example:**
881
882 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
883
884
885 * (% style="color:#037691" %)Downlink Payload (prefix 0x09 01 ):
886
887 (% class="box infomessage" %)
888 (((
889 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
890 )))
891
892
893
894 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
895
896 Set DI2 trigger.
897
898 * (% style="color:#037691" %)AT Command:
899
900 (% class="box infomessage" %)
901 (((
902 **AT+TRIG2=a,b**
903 )))
904
905 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
906
907 b : delay timing.
908
909
910 **Example:**
911
912 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
913
914
915 * (% style="color:#037691" %)Downlink Payload (prefix 0x09 02 ):
916
917 (% class="box infomessage" %)
918 (((
919 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
920 )))
921
922
923
924 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
925
926 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
927
928 * (% style="color:#037691" %)AT Command:
929
930 (% class="box infomessage" %)
931 (((
932 **AT+ACLIM. **
933 )))
934
935
936 * (% style="color:#037691" %)Downlink Payload (prefix 0xAA 01 ):
937
938 (% class="box infomessage" %)
939 (((
940 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
941 )))
942
943
944
945 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
946
947 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
948
949 * (% style="color:#037691" %)AT Command:
950
951 (% class="box infomessage" %)
952 (((
953 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
954 )))
955
956
957 * (% style="color:#037691" %)Downlink Payload (prefix 0xAA 00 ):
958
959 (% class="box infomessage" %)
960 (((
961 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
962 )))
963
964
965
966 ==== 3.4.2.11 Trigger – Set minimum interval ====
967
968 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
969
970 * (% style="color:#037691" %)AT Command:
971
972 (% class="box infomessage" %)
973 (((
974 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
975 )))
976
977
978 * (% style="color:#037691" %)Downlink Payload (prefix 0xAC ):
979
980 (% class="box infomessage" %)
981 (((
982 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
983 )))
984
985
986
987 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
988
989 * (% style="color:#037691" %)AT Command:
990
991 There is no AT Command to control Digital Output
992
993
994 * (% style="color:#037691" %)Downlink Payload (prefix 0x02):
995
996 (% class="box infomessage" %)
997 (((
998 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
999 )))
1000
1001 (((
1002 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1003 )))
1004
1005 (((
1006 01: Low,  00: High ,  11: No action
1007 )))
1008
1009 [[image:image-20220524092754-5.png]]
1010
1011 (((
1012 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1013 )))
1014
1015 (((
1016 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1017 )))
1018
1019
1020
1021 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1022
1023 * (% style="color:#037691" %)AT Command:
1024
1025 There is no AT Command to control Digital Output
1026
1027
1028 * (% style="color:#037691" %)Downlink Payload (prefix 0xA9):
1029
1030 (% class="box infomessage" %)
1031 (((
1032 (((
1033 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1034 )))
1035 )))
1036
1037 This is to control the digital output time of DO pin. Include four bytes:
1038
1039 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1040
1041 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1042
1043 01: DO pins will change back to original state after timeout.
1044
1045 00: DO pins will change to an inverter state after timeout 
1046
1047
1048 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1049
1050 [[image:image-20220524093238-6.png]]
1051
1052
1053 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1054
1055 [[image:image-20220524093328-7.png]]
1056
1057
1058 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1059
1060 [[image:image-20220524093351-8.png]]
1061
1062
1063 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1064
1065 Latching time. Unit: ms
1066
1067 Device will upload a packet if downlink code executes successfully.
1068
1069
1070 **Example payload:**
1071
1072 **~1. A9 01 01 01 01 07 D0**
1073
1074 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1075
1076 **2. A9 01 00 01 11 07 D0**
1077
1078 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1079
1080 **3. A9 00 00 00 00 07 D0**
1081
1082 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1083
1084 **4. A9 00 11 01 00 07 D0**
1085
1086 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
1087
1088
1089
1090 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1091
1092 * (% style="color:#037691" %)AT Command:
1093
1094 There is no AT Command to control Relay Output
1095
1096
1097 * (% style="color:#037691" %)Downlink Payload (prefix 0x03):
1098
1099 (% class="box infomessage" %)
1100 (((
1101 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1102 )))
1103
1104 (((
1105 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1106 )))
1107
1108 (((
1109 01: Close ,  00: Open , 11: No action
1110 )))
1111
1112 (((
1113 [[image:image-20220524093724-9.png]]
1114 )))
1115
1116 Device will upload a packet if downlink code executes successfully.
1117
1118
1119
1120 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1121
1122 * (% style="color:#037691" %)AT Command:
1123
1124 There is no AT Command to control Relay Output
1125
1126
1127 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1128
1129 **0x05 aa bb cc dd     **~/~/ Set RO1/RO2 relay with time control
1130
1131
1132 This is to control the relay output time of relay. Include four bytes:
1133
1134 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1135
1136 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1137
1138 01: Relays will change back to original state after timeout.
1139
1140 00: Relays will change to an inverter state after timeout
1141
1142
1143 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1144
1145 [[image:image-20220524093831-10.png]]
1146
1147
1148 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1149
1150 Device will upload a packet if downlink code executes successfully.
1151
1152
1153 **Example payload:**
1154
1155 **~1. 05 01 11 07 D0**
1156
1157 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1158
1159 **2. 05 01 10 07 D0**
1160
1161 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1162
1163 **3. 05 00 01 07 D0**
1164
1165 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1166
1167 **4. 05 00 00 07 D0**
1168
1169 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1170
1171
1172
1173
1174 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1175
1176 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1177
1178 * (% style="color:#037691" %)**AT Command:**
1179
1180 (% style="color:#037691" %)**​​​​​​​**(%%)**AT+VOLMAX   ** ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1181
1182
1183 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1184
1185 **0xA5 aa bb cc   **~/~/ Same as AT+VOLMAX=(aa bb),cc
1186
1187
1188
1189
1190 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1191
1192 * (% style="color:#037691" %)**AT Command:**
1193
1194 (% style="color:#037691" %)**​​​​​​​​​​​​​​**(%%)**AT+SETCNT=aa,(bb cc dd ee) **
1195
1196 aa: 1: Set count1,
1197
1198 2: Set count2,
1199
1200 3: Set AV1 count
1201
1202 Bb cc dd ee: number to be set
1203
1204
1205 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1206
1207 **0x A8 aa bb cc dd ee     **~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1208
1209
1210
1211
1212 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1213
1214 Clear counting for counting mode
1215
1216 * (% style="color:#037691" %)**AT Command:**
1217
1218 (% style="color:#037691" %)​​​​​​​​​​​​​​(%%)**AT+CLRCOUNT ** ~/~/ clear all counting
1219
1220
1221 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1222
1223 **0x A6 01    ** ~/~/ clear all counting
1224
1225
1226
1227
1228 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1229
1230 * (% style="color:#037691" %)**AT Command:**
1231
1232 **AT+COUTIME=60  **~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1233
1234
1235 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1236
1237 **0x A7 aa bb cc     **~/~/ same as AT+COUTIME =aa bb cc,
1238
1239 (((
1240 range: aa bb cc:0 to 16777215,  (unit:second)
1241
1242
1243 )))
1244
1245
1246
1247 == 3.5 Integrate with Mydevice ==
1248
1249 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:
1250
1251 (((
1252 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1253 )))
1254
1255 (((
1256 (% 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:
1257 )))
1258
1259 [[image:1653356737703-362.png||height="232" width="732"]]
1260
1261 [[image:image-20220524094641-11.png||height="390" width="723"]]
1262
1263
1264 [[image:image-20220524094641-12.png||height="402" width="718"]]
1265
1266
1267 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1268
1269 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1270
1271 Search under The things network
1272
1273 [[image:1653356838789-523.png||height="337" width="740"]]
1274
1275
1276
1277 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1278
1279 [[image:image-20220524094909-1.png||height="335" width="729"]]
1280
1281
1282 [[image:image-20220524094909-2.png||height="337" width="729"]]
1283
1284
1285 [[image:image-20220524094909-3.png||height="338" width="727"]]
1286
1287
1288 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1289
1290
1291 [[image:image-20220524094909-5.png||height="341" width="734"]]
1292
1293
1294
1295 == 3.6 Interface Detail ==
1296
1297 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1298
1299 Support NPN Type sensor
1300
1301 [[image:1653356991268-289.png]]
1302
1303
1304
1305 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1306
1307 (((
1308 The DI port of LT-22222-L can support NPN or PNP output sensor.
1309 )))
1310
1311 (((
1312 (((
1313 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
1314 )))
1315 )))
1316
1317 [[image:1653357170703-587.png]]
1318
1319 (((
1320 (((
1321 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1322 )))
1323 )))
1324
1325 (((
1326
1327 )))
1328
1329 (((
1330 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1331 )))
1332
1333 (((
1334 This type of sensor will output a low signal GND when active.
1335 )))
1336
1337 * (((
1338 Connect sensor’s output to DI1-
1339 )))
1340 * (((
1341 Connect sensor’s VCC to DI1+.
1342 )))
1343
1344 (((
1345 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1346 )))
1347
1348 (((
1349 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1350 )))
1351
1352 (((
1353 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.
1354 )))
1355
1356 (((
1357
1358 )))
1359
1360 (((
1361 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1362 )))
1363
1364 (((
1365 This type of sensor will output a high signal (example 24v) when active.
1366 )))
1367
1368 * (((
1369 Connect sensor’s output to DI1+
1370 )))
1371 * (((
1372 Connect sensor’s GND DI1-.
1373 )))
1374
1375 (((
1376 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1377 )))
1378
1379 (((
1380 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1381 )))
1382
1383 (((
1384 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.
1385 )))
1386
1387 (((
1388
1389 )))
1390
1391 (((
1392 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1393 )))
1394
1395 (((
1396 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1397 )))
1398
1399 * (((
1400 Connect sensor’s output to DI1+ with a serial 50K resistor
1401 )))
1402 * (((
1403 Connect sensor’s GND DI1-.
1404 )))
1405
1406 (((
1407 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1408 )))
1409
1410 (((
1411 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1412 )))
1413
1414 (((
1415 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.
1416 )))
1417
1418
1419
1420 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1421
1422 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1423
1424 [[image:1653357531600-905.png]]
1425
1426
1427
1428 === 3.6.4 Analog Input Interface ===
1429
1430 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:
1431
1432
1433 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1434
1435 [[image:1653357592296-182.png]]
1436
1437 Example to connect a 4~~20mA sensor
1438
1439 We take the wind speed sensor as an example for reference only.
1440
1441
1442 **Specifications of the wind speed sensor:**
1443
1444 Red:  12~~24v
1445
1446 Yellow:  4~~20mA
1447
1448 Black:  GND
1449
1450
1451 **Connection diagram:**
1452
1453 [[image:1653357640609-758.png]]
1454
1455 [[image:1653357648330-671.png||height="155" width="733"]]
1456
1457
1458
1459 === 3.6.5 Relay Output ===
1460
1461 (((
1462 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:
1463 )))
1464
1465 [[image:image-20220524100215-9.png]]
1466
1467 [[image:image-20220524100215-10.png||height="382" width="723"]]
1468
1469
1470
1471 == 3.7 LEDs Indicators ==
1472
1473 [[image:image-20220524100748-11.png]]
1474
1475
1476 = 4. Use AT Command =
1477
1478 == 4.1 Access AT Command ==
1479
1480 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.
1481
1482 [[image:1653358238933-385.png]]
1483
1484
1485 (((
1486 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:
1487 )))
1488
1489 [[image:1653358355238-883.png]]
1490
1491
1492 (((
1493 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/]]
1494 )))
1495
1496 (((
1497 AT+<CMD>?        : Help on <CMD>
1498 )))
1499
1500 (((
1501 AT+<CMD>         : Run <CMD>
1502 )))
1503
1504 (((
1505 AT+<CMD>=<value> : Set the value
1506 )))
1507
1508 (((
1509 AT+<CMD>=?       : Get the value
1510 )))
1511
1512 (((
1513 ATZ: Trig a reset of the MCU
1514 )))
1515
1516 (((
1517 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1518 )))
1519
1520 (((
1521 AT+DEUI: Get or Set the Device EUI
1522 )))
1523
1524 (((
1525 AT+DADDR: Get or Set the Device Address
1526 )))
1527
1528 (((
1529 AT+APPKEY: Get or Set the Application Key
1530 )))
1531
1532 (((
1533 AT+NWKSKEY: Get or Set the Network Session Key
1534 )))
1535
1536 (((
1537 AT+APPSKEY: Get or Set the Application Session Key
1538 )))
1539
1540 (((
1541 AT+APPEUI: Get or Set the Application EUI
1542 )))
1543
1544 (((
1545 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1546 )))
1547
1548 (((
1549 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1550 )))
1551
1552 (((
1553 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1554 )))
1555
1556 (((
1557 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1558 )))
1559
1560 (((
1561 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1562 )))
1563
1564 (((
1565 AT+RX2FQ: Get or Set the Rx2 window frequency
1566 )))
1567
1568 (((
1569 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1570 )))
1571
1572 (((
1573 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1574 )))
1575
1576 (((
1577 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1578 )))
1579
1580 (((
1581 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1582 )))
1583
1584 (((
1585 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1586 )))
1587
1588 (((
1589 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1590 )))
1591
1592 (((
1593 AT+NWKID: Get or Set the Network ID
1594 )))
1595
1596 (((
1597 AT+FCU: Get or Set the Frame Counter Uplink
1598 )))
1599
1600 (((
1601 AT+FCD: Get or Set the Frame Counter Downlink
1602 )))
1603
1604 (((
1605 AT+CLASS: Get or Set the Device Class
1606 )))
1607
1608 (((
1609 AT+JOIN: Join network
1610 )))
1611
1612 (((
1613 AT+NJS: Get OTAA Join Status
1614 )))
1615
1616 (((
1617 AT+SENDB: Send hexadecimal data along with the application port
1618 )))
1619
1620 (((
1621 AT+SEND: Send text data along with the application port
1622 )))
1623
1624 (((
1625 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1626 )))
1627
1628 (((
1629 AT+RECV: Print last received data in raw format
1630 )))
1631
1632 (((
1633 AT+VER: Get current image version and Frequency Band
1634 )))
1635
1636 (((
1637 AT+CFM: Get or Set the confirmation mode (0-1)
1638 )))
1639
1640 (((
1641 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1642 )))
1643
1644 (((
1645 AT+SNR: Get the SNR of the last received packet
1646 )))
1647
1648 (((
1649 AT+RSSI: Get the RSSI of the last received packet
1650 )))
1651
1652 (((
1653 AT+TDC: Get or set the application data transmission interval in ms
1654 )))
1655
1656 (((
1657 AT+PORT: Get or set the application port
1658 )))
1659
1660 (((
1661 AT+DISAT: Disable AT commands
1662 )))
1663
1664 (((
1665 AT+PWORD: Set password, max 9 digits
1666 )))
1667
1668 (((
1669 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1670 )))
1671
1672 (((
1673 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1674 )))
1675
1676 (((
1677 AT+CFG: Print all settings
1678
1679
1680 )))
1681
1682
1683
1684 == 4.2 Common AT Command Sequence ==
1685
1686 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1687
1688 (((
1689
1690
1691 **If device has not joined network yet:**
1692 )))
1693
1694 (((
1695 (% style="background-color:#dcdcdc" %)123456
1696 )))
1697
1698 (((
1699 (% style="background-color:#dcdcdc" %)AT+FDR
1700 )))
1701
1702 (((
1703 (% style="background-color:#dcdcdc" %)123456
1704 )))
1705
1706 (((
1707 (% style="background-color:#dcdcdc" %)AT+NJM=0
1708 )))
1709
1710 (((
1711 (% style="background-color:#dcdcdc" %)ATZ
1712 )))
1713
1714
1715 (((
1716 **If device already joined network:**
1717 )))
1718
1719 (((
1720 (% style="background-color:#dcdcdc" %)AT+NJM=0
1721 )))
1722
1723 (((
1724 (% style="background-color:#dcdcdc" %)ATZ
1725
1726
1727 )))
1728
1729
1730
1731 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1732
1733 (((
1734
1735
1736 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1737 )))
1738
1739 (((
1740 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1741 )))
1742
1743 (((
1744 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1745 )))
1746
1747 (((
1748 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1749 )))
1750
1751 (((
1752 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1753 )))
1754
1755 (((
1756 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1757 )))
1758
1759 (((
1760 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1761 )))
1762
1763 (((
1764 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1765 )))
1766
1767 (((
1768 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1769 )))
1770
1771 (((
1772 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1773 )))
1774
1775 (((
1776 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1777 )))
1778
1779 (((
1780 (% 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.
1781 )))
1782
1783 (((
1784 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1785
1786
1787 )))
1788
1789 (((
1790 (% style="color:red" %)**Note:**
1791 )))
1792
1793 (((
1794 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1795 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1796 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.
1797 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
1798 )))
1799
1800 (((
1801 [[image:1653359097980-169.png||height="188" width="729"]]
1802 )))
1803
1804 (((
1805
1806 )))
1807
1808
1809 === 4.2.3 Change to Class A ===
1810
1811 If sensor JOINED
1812 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1813 ATZ
1814
1815
1816 = 5. FAQ =
1817
1818 == 5.1 How to upgrade the image? ==
1819
1820
1821 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1822
1823 * Support new features
1824 * For bug fix
1825 * Change LoRaWAN bands.
1826
1827 Below shows the hardware connection for how to upload an image to the LT:
1828
1829 [[image:1653359603330-121.png]]
1830
1831
1832 (((
1833 (% 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]].
1834 (% 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/]].
1835 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1836
1837
1838 (% style="color:blue" %)**For LT-22222-L**(%%):
1839 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.
1840 )))
1841
1842 [[image:image-20220524103407-12.png]]
1843
1844 [[image:image-20220524103429-13.png]]
1845
1846 [[image:image-20220524104033-15.png]]
1847
1848
1849 (% 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:
1850
1851 [[image:1653360054704-518.png||height="186" width="745"]]
1852
1853
1854 (((
1855 (((
1856
1857
1858 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1859 )))
1860 )))
1861
1862 (((
1863 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1864 )))
1865
1866 (((
1867
1868
1869 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1870 )))
1871
1872 (((
1873 (((
1874 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1875 )))
1876 )))
1877
1878 (((
1879 (((
1880 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1881
1882
1883 )))
1884 )))
1885
1886 (((
1887 (% 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.
1888 )))
1889
1890 (((
1891 [[image:1653360231087-571.png||height="401" width="727"]]
1892 )))
1893
1894 (((
1895 (% 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.
1896 )))
1897
1898
1899 (((
1900 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1901 )))
1902
1903 (((
1904 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1905 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1906 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1907 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1908 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1909 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1910 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1911 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1912 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1913 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1914 )))
1915
1916
1917 (((
1918 As shown in below:
1919 )))
1920
1921 [[image:1653360498588-932.png||height="485" width="726"]]
1922
1923
1924 == 5.4 Can I see counting event in Serial? ==
1925
1926 (((
1927 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.
1928
1929
1930 == 5.5 Can i use point to point communication for LT-22222-L? ==
1931
1932 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1933 )))
1934
1935 (((
1936 == 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
1937
1938 If the device is not shut down, but directly powered off.
1939
1940 It will default that this is a power-off state.
1941
1942 In modes 2 to 5, DO RO status and pulse count are saved in flash.
1943
1944 After restart, the status before power failure will be read from flash.
1945
1946 = 6. Trouble Shooting =
1947 )))
1948
1949 (((
1950 (((
1951 == 6.1 Downlink doesn’t work, how to solve it? ==
1952 )))
1953 )))
1954
1955 (((
1956 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1957 )))
1958
1959 (((
1960
1961
1962 == 6.2 Have trouble to upload image. ==
1963 )))
1964
1965 (((
1966 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1967 )))
1968
1969 (((
1970
1971
1972 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1973 )))
1974
1975 (((
1976 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1977 )))
1978
1979
1980
1981 = 7. Order Info =
1982
1983
1984 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1985
1986
1987 (% style="color:#4f81bd" %)**XXX:**
1988
1989 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1990 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1991 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1992 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1993 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1994 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1995 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1996 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1997 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1998
1999 = 8. Packing Info =
2000
2001
2002 **Package Includes**:
2003
2004 * LT-22222-L I/O Controller x 1
2005 * Stick Antenna for LoRa RF part x 1
2006 * Bracket for controller x1
2007 * Program cable x 1
2008
2009 **Dimension and weight**:
2010
2011 * Device Size: 13.5 x 7 x 3 cm
2012 * Device Weight: 105g
2013 * Package Size / pcs : 14.5 x 8 x 5 cm
2014 * Weight / pcs : 170g
2015
2016 = 9. Support =
2017
2018 * (((
2019 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.
2020 )))
2021 * (((
2022 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]]
2023 )))
2024
2025 = 10. Reference​​​​​ =
2026
2027 * 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]]
2028 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2029 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2030 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]