Version 68.22 by Xiaoling on 2022/05/31 11:07
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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 = 1.Introduction =
15
16 == 1.1 What is LT Series I/O Controller ==
17
18 (((
19 The Dragino LT series I/O Modules are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as: analog current Input, analog voltage input, relay output, digital input and digital output etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
20 )))
21
22 (((
23 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.
24 )))
25
26 (((
27 The LT I/O Controllers is aiming to provide a simple plug and play, low cost installation by using LoRaWAN wireless technology.
28 )))
29
30 (((
31 The use environment includes:
32 )))
33
34 (((
35 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.
36 )))
37
38 (((
39 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
40 )))
41
42 (((
43 [[image:1653295757274-912.png]]
44
45
46 )))
47
48 == 1.2  Specifications ==
49
50 (((
51 **Hardware System:**
52 )))
53
54 * (((
55 STM32L072CZT6 MCU
56 )))
57 * (((
58 SX1276/78 Wireless Chip 
59 )))
60 * (((
61 (((
62 Power Consumption:
63 )))
64
65 * (((
66 Idle: 4mA@12v
67 )))
68 * (((
69 20dB Transmit: 34mA@12v
70 )))
71 )))
72
73 (((
74 **Interface for Model: LT22222-L:**
75 )))
76
77 * (((
78 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
79 )))
80 * (((
81 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
82 )))
83 * (((
84 2 x Relay Output (5A@250VAC / 30VDC)
85 )))
86 * (((
87 2 x 0~~20mA Analog Input (res:0.01mA)
88 )))
89 * (((
90 2 x 0~~30V Analog Input (res:0.01v)
91 )))
92 * (((
93 Power Input 7~~ 24V DC. 
94 )))
95
96 (((
97 **LoRa Spec:**
98 )))
99
100 * (((
101 (((
102 Frequency Range:
103 )))
104
105 * (((
106 Band 1 (HF): 862 ~~ 1020 Mhz
107 )))
108 * (((
109 Band 2 (LF): 410 ~~ 528 Mhz
110 )))
111 )))
112 * (((
113 168 dB maximum link budget.
114 )))
115 * (((
116 +20 dBm - 100 mW constant RF output vs.
117 )))
118 * (((
119 +14 dBm high efficiency PA.
120 )))
121 * (((
122 Programmable bit rate up to 300 kbps.
123 )))
124 * (((
125 High sensitivity: down to -148 dBm.
126 )))
127 * (((
128 Bullet-proof front end: IIP3 = -12.5 dBm.
129 )))
130 * (((
131 Excellent blocking immunity.
132 )))
133 * (((
134 Low RX current of 10.3 mA, 200 nA register retention.
135 )))
136 * (((
137 Fully integrated synthesizer with a resolution of 61 Hz.
138 )))
139 * (((
140 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
141 )))
142 * (((
143 Built-in bit synchronizer for clock recovery.
144 )))
145 * (((
146 Preamble detection.
147 )))
148 * (((
149 127 dB Dynamic Range RSSI.
150 )))
151 * (((
152 Automatic RF Sense and CAD with ultra-fast AFC.
153 )))
154 * (((
155 Packet engine up to 256 bytes with CRC.
156
157
158 )))
159
160 == 1.3 Features ==
161
162 * LoRaWAN Class A & Class C protocol
163 * Optional Customized LoRa Protocol
164 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
165 * AT Commands to change parameters
166 * Remote configure parameters via LoRa Downlink
167 * Firmware upgradable via program port
168 * Counting
169
170 == 1.4  Applications ==
171
172 * Smart Buildings & Home Automation
173 * Logistics and Supply Chain Management
174 * Smart Metering
175 * Smart Agriculture
176 * Smart Cities
177 * Smart Factory
178
179 == 1.5 Hardware Variants ==
180
181 (% border="1" style="background-color:#f7faff; width:500px" %)
182 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
183 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
184 * 2 x Digital Input (Bi-direction)
185 * 2 x Digital Output
186 * 2 x Relay Output (5A@250VAC / 30VDC)
187 * 2 x 0~~20mA Analog Input (res:0.01mA)
188 * 2 x 0~~30V Analog Input (res:0.01v)
189 * 1 x Counting Port
190 )))
191
192
193 = 2. Power ON Device =
194
195 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.
196
197 (((
198 PWR will on when device is properly powered.
199 )))
200
201 [[image:1653297104069-180.png]]
202
203
204 = 3. Operation Mode =
205
206 == 3.1 How it works? ==
207
208 (((
209 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. 
210 )))
211
212 (((
213 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.
214
215
216 )))
217
218 == 3.2 Example to join LoRaWAN network ==
219
220 (((
221 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. 
222 )))
223
224 [[image:image-20220523172350-1.png||height="266" width="864"]]
225
226 (((
227 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:
228 )))
229
230 (((
231 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
232 )))
233
234 (((
235 Each LT is shipped with a sticker with the default device EUI as below:
236 )))
237
238 [[image:1653297924498-393.png]]
239
240 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
241
242 Add APP EUI in the application.
243
244 [[image:1653297955910-247.png||height="321" width="716"]]
245
246
247 Add APP KEY and DEV EUI
248
249 [[image:1653298023685-319.png]]
250
251
252 (((
253 **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.
254 )))
255
256 [[image:1653298044601-602.png||height="405" width="709"]]
257
258
259 == 3.3 Uplink Payload ==
260
261 There are five working modes + one interrupt mode on LT for different type application:
262
263 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
264 * **MOD2**: Double DI Counting + DO + RO
265 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
266 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
267 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
268 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
269
270 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
271
272 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
273
274 [[image:image-20220523174024-3.png]]
275
276 (((
277 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
278 )))
279
280 [[image:image-20220523174254-4.png]]
281
282 * RO is for relay. ROx=1 : close，ROx=0 always open.
283 * DI is for digital input. DIx=1: high or float, DIx=0: low.
284 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
285
286 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
287
288 For example if payload is: [[image:image-20220523175847-2.png]]
289
290 **The value for the interface is:  **
291
292 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
293
294 AVI2 channel voltage is 0x04AC/1000=1.196V
295
296 ACI1 channel current is 0x1310/1000=4.880mA
297
298 ACI2 channel current is 0x1300/1000=4.864mA
299
300 The last byte 0xAA= 10101010(B) means
301
302 * [1] RO1 relay channel is close and the RO1 LED is ON.
303 * [0] RO2 relay channel is open and RO2 LED is OFF;
304
305 **LT22222-L:**
306
307 * [1] DI2 channel is high input and DI2 LED is ON;
308 * [0] DI1 channel is low input;
309
310 * [0] DO3 channel output state
311 ** DO3 is float in case no load between DO3 and V+.;
312 ** DO3 is high in case there is load between DO3 and V+.
313 ** DO3 LED is off in both case
314 * [1] DO2 channel output is low and DO2 LED is ON.
315 * [0] DO1 channel output state
316 ** DO1 is float in case no load between DO1 and V+.;
317 ** DO1 is high in case there is load between DO1 and V+.
318 ** DO1 LED is off in both case
319
320 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
321
322 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
323
324 (((
325 Total : 11 bytes payload
326 )))
327
328 [[image:image-20220523180452-3.png]]
329
330 (((
331 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
332 )))
333
334 [[image:image-20220523180506-4.png]]
335
336 * RO is for relay. ROx=1 : close，ROx=0 always open.
337 * FIRST: Indicate this is the first packet after join network.
338 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
339
340 (((
341 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
342 )))
343
344 (((
345 **To use counting mode, please run:**
346 )))
347
348 (% class="box infomessage" %)
349 (((
350 (((
351 **AT+MOD=2**
352 )))
353 )))
354
355 (% class="box infomessage" %)
356 (((
357 (((
358 **ATZ**
359 )))
360 )))
361
362 (((
363 (% style="color:#4f81bd" %)**AT Commands for counting:**
364 )))
365
366 (((
367 **For LT22222-L:**
368 )))
369
370 (% class="box infomessage" %)
371 (((
372 (((
373 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
374 )))
375 )))
376
377 (% class="box infomessage" %)
378 (((
379 (((
380 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
381 )))
382 )))
383
384 (% class="box infomessage" %)
385 (((
386 (((
387 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
388 )))
389 )))
390
391 (% class="box infomessage" %)
392 (((
393 (((
394 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
395 )))
396 )))
397
398 (% class="box infomessage" %)
399 (((
400 (((
401 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
402 )))
403 )))
404
405 (% class="box infomessage" %)
406 (((
407 (((
408 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
409 )))
410 )))
411
412
413 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
414
415 **LT22222-L**: This mode the DI1 is used as a counting pin.
416
417 [[image:image-20220523181246-5.png]]
418
419 (((
420 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
421 )))
422
423 [[image:image-20220523181301-6.png]]
424
425 * RO is for relay. ROx=1 : close，ROx=0 always open.
426 * FIRST: Indicate this is the first packet after join network.
427 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
428
429 (((
430 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
431 )))
432
433 (((
434 **To use counting mode, please run:**
435 )))
436
437 (% class="box infomessage" %)
438 (((
439 (((
440 **AT+MOD=3**
441 )))
442 )))
443
444 (% class="box infomessage" %)
445 (((
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 **LT22222-L**: This mode the DI1 is used as a counting pin.
460
461 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.
462
463 [[image:image-20220523181903-8.png]]
464
465 (((
466 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
467 )))
468
469 [[image:image-20220523181727-7.png]]
470
471 * RO is for relay. ROx=1 : close，ROx=0 always open.
472 * FIRST: Indicate this is the first packet after join network.
473 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
474
475 (((
476 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
477 )))
478
479 (((
480 **To use this mode, please run:**
481 )))
482
483 (% class="box infomessage" %)
484 (((
485 (((
486 **AT+MOD=4**
487 )))
488 )))
489
490 (% class="box infomessage" %)
491 (((
492 (((
493 **ATZ**
494 )))
495 )))
496
497 (((
498
499 )))
500
501 (((
502 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
503 )))
504
505 (((
506 **Plus below command for AVI1 Counting:**
507 )))
508
509 (% class="box infomessage" %)
510 (((
511 (((
512 **AT+SETCNT=3,60   (set AVI Count to 60)**
513 )))
514 )))
515
516 (% class="box infomessage" %)
517 (((
518 (((
519 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
520 )))
521 )))
522
523 (% class="box infomessage" %)
524 (((
525 (((
526 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
527 )))
528 )))
529
530 (% class="box infomessage" %)
531 (((
532 (((
533 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
534 )))
535 )))
536
537
538 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
539
540 **LT22222-L**: This mode the DI1 is used as a counting pin.
541
542 [[image:image-20220523182334-9.png]]
543
544 (((
545 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
546 )))
547
548 * RO is for relay. ROx=1 : close，ROx=0 always open.
549 * FIRST: Indicate this is the first packet after join network.
550 * (((
551 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
552 )))
553
554 (((
555 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
556 )))
557
558 (((
559 **To use this mode, please run:**
560 )))
561
562 (% class="box infomessage" %)
563 (((
564 (((
565 **AT+MOD=5**
566 )))
567 )))
568
569 (% class="box infomessage" %)
570 (((
571 (((
572 **ATZ**
573 )))
574 )))
575
576 (((
577 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
578
579
580 )))
581
582 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
583
584 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
585
586 For example, if user has configured below commands:
587
588 * **AT+MOD=1 ** **~-~->** The normal working mode
589 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
590
591 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
592
593 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
594 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.**
595
596 **AT Command to set Trigger Condition**:
597
598 (% style="color:#4f81bd" %)**Trigger base on voltage**:
599
600 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
601
602 **Example:**
603
604 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)
605
606 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
607
608 (% style="color:#4f81bd" %)**Trigger base on current**:
609
610 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
611
612 **Example:**
613
614 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
615
616 (% style="color:#4f81bd" %)**Trigger base on DI status**:
617
618 DI status trigger Flag.
619
620 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
621
622 **Example:**
623
624 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
625
626
627 **Downlink Command to set Trigger Condition**
628
629 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
630
631 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
632
633 AA: Code for this downlink Command:
634
635 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
636
637 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
638
639 yy2 yy2: AC1 or AV1 high limit.
640
641 yy3 yy3: AC2 or AV2 low limit.
642
643 Yy4 yy4: AC2 or AV2 high limit.
644
645 **Example1**: AA 00 13 88 00 00 00 00 00 00
646
647 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
648
649 **Example2**: AA 02 01 00
650
651 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
652
653 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
654
655 MOD6 Payload : total 11 bytes payload
656
657 [[image:image-20220524085923-1.png]]
658
659 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
660
661 [[image:image-20220524090106-2.png]]
662
663 * Each bits shows if the corresponding trigger has been configured.
664
665 **Example:**
666
667 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
668
669
670 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
671
672 [[image:image-20220524090249-3.png]]
673
674 * Each bits shows which status has been trigger on this uplink.
675
676 **Example:**
677
678 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
679
680
681 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
682
683 [[image:image-20220524090456-4.png]]
684
685 * Each bits shows which status has been trigger on this uplink.
686
687 **Example:**
688
689 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
690
691 00000101: Means both DI1 and DI2 trigger are enabled.
692
693
694 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
695
696 Downlink command to poll MOD6 status:
697
698 **AB 06**
699
700 When device got this command, it will send the MOD6 payload.
701
702
703 === 3.3.7 Payload Decoder ===
704
705 (((
706 **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/]]
707
708
709 )))
710
711 == 3.4 ​Configure LT via AT or Downlink ==
712
713 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
714
715 (((
716 There are two kinds of Commands:
717 )))
718
719 * (% 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: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
720
721 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
722
723 === 3.4.1 Common Commands ===
724
725 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]]
726
727
728 === 3.4.2 Sensor related commands ===
729
730 ==== 3.4.2.1 Set Transmit Interval ====
731
732 Set device uplink interval.
733
734 * AT Command:
735
736 (% class="box infomessage" %)
737 (((
738 **AT+TDC=N **
739 )))
740
741 **Example: **AT+TDC=30000. Means set interval to 30 seconds
742
743 * Downlink Payload (prefix 0x01):
744
745 (% class="box infomessage" %)
746 (((
747 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
748 )))
749
750
751 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
752
753 Set work mode.
754
755 * AT Command:
756
757 (% class="box infomessage" %)
758 (((
759 **AT+MOD=N  **
760 )))
761
762 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
763
764 * Downlink Payload (prefix 0x0A):
765
766 (% class="box infomessage" %)
767 (((
768 **0x0A aa     ~/~/ Same as AT+MOD=aa**
769 )))
770
771
772 ==== 3.4.2.3 Poll an uplink ====
773
774 * AT Command:
775
776 There is no AT Command to poll uplink
777
778 * Downlink Payload (prefix 0x08):
779
780 (% class="box infomessage" %)
781 (((
782 **0x08 FF     ~/~/ Poll an uplink,**
783 )))
784
785 **Example**: 0x08FF, ask device to send an Uplink
786
787
788 ==== 3.4.2.4 Enable Trigger Mode ====
789
790 Use of trigger mode, please check [[ADDMOD6>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
791
792 * AT Command:
793
794 (% class="box infomessage" %)
795 (((
796 **AT+ADDMOD6=1 or 0**
797 )))
798
799 1: Enable Trigger Mode
800
801 0: Disable Trigger Mode
802
803 * Downlink Payload (prefix 0x0A 06):
804
805 (% class="box infomessage" %)
806 (((
807 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
808 )))
809
810
811 ==== 3.4.2.5 Poll trigger settings ====
812
813 Poll trigger settings,
814
815 * AT Command:
816
817 There is no AT Command for this feature.
818
819 * Downlink Payload (prefix 0x AB 06):
820
821 (% class="box infomessage" %)
822 (((
823 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
824 )))
825
826
827 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
828
829 Enable Disable DI1/DI2/DI2 as trigger,
830
831 * AT Command:
832
833 (% class="box infomessage" %)
834 (((
835 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
836 )))
837
838 **Example:**
839
840 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
841
842 * Downlink Payload (prefix 0xAA 02):
843
844 (% class="box infomessage" %)
845 (((
846 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
847 )))
848
849
850 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
851
852 Set DI1 or DI3(for LT-33222-L) trigger.
853
854 * AT Command:
855
856 (% class="box infomessage" %)
857 (((
858 **AT+TRIG1=a,b**
859 )))
860
861 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
862
863 b : delay timing.
864
865 **Example:**
866
867 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
868
869 * Downlink Payload (prefix 0x09 01 ):
870
871 (% class="box infomessage" %)
872 (((
873 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
874 )))
875
876
877 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
878
879 Set DI2 trigger.
880
881 * AT Command:
882
883 (% class="box infomessage" %)
884 (((
885 **AT+TRIG2=a,b**
886 )))
887
888 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
889
890 b : delay timing.
891
892 **Example:**
893
894 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
895
896 * Downlink Payload (prefix 0x09 02 ):
897
898 (% class="box infomessage" %)
899 (((
900 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
901 )))
902
903
904 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
905
906 Set current trigger , base on AC port. See [[trigger mode>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
907
908 * AT Command:
909
910 (% class="box infomessage" %)
911 (((
912 **AT+ACLIM. **
913 )))
914
915 * Downlink Payload (prefix 0xAA 01 ):
916
917 (% class="box infomessage" %)
918 (((
919 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
920 )))
921
922
923 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
924
925 Set current trigger , base on AV port. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
926
927 * AT Command:
928
929 (% class="box infomessage" %)
930 (((
931 **AT+AVLIM. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
932 )))
933
934 * Downlink Payload (prefix 0xAA 00 ):
935
936 (% class="box infomessage" %)
937 (((
938 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]] **
939 )))
940
941
942 ==== 3.4.2.11 Trigger – Set minimum interval ====
943
944 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
945
946 * AT Command:
947
948 (% class="box infomessage" %)
949 (((
950 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
951 )))
952
953 * Downlink Payload (prefix 0xAC ):
954
955 (% class="box infomessage" %)
956 (((
957 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
958 )))
959
960
961 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
962
963 * AT Command:
964
965 There is no AT Command to control Digital Output
966
967 * Downlink Payload (prefix 0x02):
968
969 (% class="box infomessage" %)
970 (((
971 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
972 )))
973
974 (((
975 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
976 )))
977
978 (((
979 01: Low,  00: High ,  11: No action
980 )))
981
982 [[image:image-20220524092754-5.png]]
983
984 (((
985 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
986 )))
987
988 (((
989 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
990 )))
991
992
993 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
994
995 * AT Command:
996
997 There is no AT Command to control Digital Output
998
999 * Downlink Payload (prefix 0xA9):
1000
1001 (% class="box infomessage" %)
1002 (((
1003 (((
1004 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1005 )))
1006 )))
1007
1008 This is to control the digital output time of DO pin. Include four bytes:
1009
1010 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1011
1012 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1013
1014 01: DO pins will change back to original state after timeout.
1015
1016 00: DO pins will change to an inverter state after timeout 
1017
1018 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1019
1020 [[image:image-20220524093238-6.png]]
1021
1022 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1023
1024 [[image:image-20220524093328-7.png]]
1025
1026 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1027
1028 [[image:image-20220524093351-8.png]]
1029
1030 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1031
1032 Latching time. Unit: ms
1033
1034 Device will upload a packet if downlink code executes successfully.
1035
1036 **Example payload:**
1037
1038 **~1. A9 01 01 01 01 07 D0**
1039
1040 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1041
1042 **2. A9 01 00 01 11 07 D0**
1043
1044 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1045
1046 **3. A9 00 00 00 00 07 D0**
1047
1048 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1049
1050 **4. A9 00 11 01 00 07 D0**
1051
1052 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
1053
1054
1055 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1056
1057 * AT Command:
1058
1059 There is no AT Command to control Relay Output
1060
1061 * Downlink Payload (prefix 0x03):
1062
1063 (% class="box infomessage" %)
1064 (((
1065 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1066 )))
1067
1068 (((
1069 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1070 )))
1071
1072 (((
1073 01: Close ,  00: Open , 11: No action
1074 )))
1075
1076 (((
1077 [[image:image-20220524093724-9.png]]
1078 )))
1079
1080 Device will upload a packet if downlink code executes successfully.
1081
1082
1083 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1084
1085 * AT Command:
1086
1087 There is no AT Command to control Relay Output
1088
1089 * Downlink Payload (prefix 0x05):
1090
1091 (% class="box infomessage" %)
1092 (((
1093 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1094 )))
1095
1096 This is to control the relay output time of relay. Include four bytes:
1097
1098 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1099
1100 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1101
1102 01: Relays will change back to original state after timeout.
1103
1104 00: Relays will change to an inverter state after timeout
1105
1106 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1107
1108 [[image:image-20220524093831-10.png]]
1109
1110 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1111
1112 Device will upload a packet if downlink code executes successfully.
1113
1114 **Example payload:**
1115
1116 **~1. 05 01 11 07 D0**
1117
1118 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1119
1120 **2. 05 01 10 07 D0**
1121
1122 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1123
1124 **3. 05 00 01 07 D0**
1125
1126 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1127
1128 **4. 05 00 00 07 D0**
1129
1130 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1131
1132
1133 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1134
1135 When voltage exceed the threshold, count. Feature see [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]
1136
1137 * AT Command:
1138
1139 (% class="box infomessage" %)
1140 (((
1141 **AT+VOLMAX    ~/~/ See [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]**
1142 )))
1143
1144 * Downlink Payload (prefix 0xA5):
1145
1146 (% class="box infomessage" %)
1147 (((
1148 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1149 )))
1150
1151
1152 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1153
1154 * AT Command:
1155
1156 (% class="box infomessage" %)
1157 (((
1158 **AT+SETCNT=aa,(bb cc dd ee) **
1159 )))
1160
1161 aa: 1: Set count1,
1162
1163 2: Set count2,
1164
1165 3: Set AV1 count
1166
1167 Bb cc dd ee: number to be set
1168
1169 * Downlink Payload (prefix 0xA8):
1170
1171 (% class="box infomessage" %)
1172 (((
1173 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1174 )))
1175
1176
1177 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1178
1179 Clear counting for counting mode
1180
1181 * AT Command:
1182
1183 (% class="box infomessage" %)
1184 (((
1185 **AT+CLRCOUNT ~/~/ clear all counting**
1186 )))
1187
1188 * Downlink Payload (prefix 0xA6):
1189
1190 (% class="box infomessage" %)
1191 (((
1192 **0x A6 01     ~/~/ clear all counting,**
1193 )))
1194
1195
1196 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1197
1198 * AT Command:
1199
1200 (% class="box infomessage" %)
1201 (((
1202 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1203 )))
1204
1205 * Downlink Payload (prefix 0xA7):
1206
1207 (% class="box infomessage" %)
1208 (((
1209 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1210 )))
1211
1212 (((
1213 range: aa bb cc:0 to 16777215,  (unit:second)
1214
1215
1216 )))
1217
1218 == 3.5 Integrate with Mydevice ==
1219
1220 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:
1221
1222 (((
1223 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1224 )))
1225
1226 (((
1227 **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:
1228 )))
1229
1230 [[image:1653356737703-362.png||height="232" width="732"]]
1231
1232 [[image:image-20220524094641-11.png||height="390" width="723"]]
1233
1234 [[image:image-20220524094641-12.png||height="402" width="718"]]
1235
1236 **Step 3**: Create an account or log in Mydevices.
1237
1238 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1239
1240 Search under The things network
1241
1242 [[image:1653356838789-523.png||height="337" width="740"]]
1243
1244
1245 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1246
1247 [[image:image-20220524094909-1.png||height="335" width="729"]]
1248
1249 [[image:image-20220524094909-2.png||height="337" width="729"]]
1250
1251 [[image:image-20220524094909-3.png||height="338" width="727"]]
1252
1253 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1254
1255 [[image:image-20220524094909-5.png||height="341" width="734"]]
1256
1257
1258 == 3.6 Interface Detail ==
1259
1260 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1261
1262 Support NPN Type sensor
1263
1264 [[image:1653356991268-289.png]]
1265
1266
1267 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1268
1269 (((
1270 The DI port of LT-22222-L can support NPN or PNP output sensor.
1271 )))
1272
1273 (((
1274 (((
1275 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
1276 )))
1277 )))
1278
1279 [[image:1653357170703-587.png]]
1280
1281 (((
1282 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1283 )))
1284
1285
1286 **Example1**: Connect to a Low active sensor.
1287
1288 This type of sensor will output a low signal GND when active.
1289
1290 * Connect sensor’s output to DI1-
1291 * Connect sensor’s VCC to DI1+.
1292
1293 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1294
1295 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]] = DI1+ / 1K.**
1296
1297 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1298
1299
1300 **Example2**: Connect to a High active sensor.
1301
1302 This type of sensor will output a high signal (example 24v) when active.
1303
1304 * Connect sensor’s output to DI1+
1305 * Connect sensor’s GND DI1-.
1306
1307 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1308
1309 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
1310
1311 If **DI1+ = 24v**, the [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1312
1313
1314 **Example3**: Connect to a 220v high active sensor.
1315
1316 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1317
1318 * Connect sensor’s output to DI1+ with a serial 50K resistor
1319 * Connect sensor’s GND DI1-.
1320
1321 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1322
1323 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
1324
1325 If sensor output is 220v, the (% 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.
1326
1327
1328 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1329
1330 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1331
1332 [[image:1653357531600-905.png]]
1333
1334
1335 === 3.6.4 Analog Input Interface ===
1336
1337 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:
1338
1339 **AC2 = (IN2 voltage )/12**
1340
1341 [[image:1653357592296-182.png]]
1342
1343 Example to connect a 4~~20mA sensor
1344
1345 We take the wind speed sensor as an example for reference only.
1346
1347 Specifications of the wind speed sensor:
1348
1349 Red:12~~24v
1350
1351 Yellow:4~~20mA
1352
1353 Black:GND
1354
1355
1356 Connection diagram:
1357
1358 [[image:1653357640609-758.png]]
1359
1360 [[image:1653357648330-671.png||height="155" width="733"]]
1361
1362
1363 === 3.6.5 Relay Output ===
1364
1365 (((
1366 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:
1367 )))
1368
1369 [[image:image-20220524100215-9.png]]
1370
1371 [[image:image-20220524100215-10.png||height="382" width="723"]]
1372
1373
1374 == 3.7 LEDs Indicators ==
1375
1376 [[image:image-20220524100748-11.png]]
1377
1378
1379 = 4. Use AT Command =
1380
1381 == 4.1 Access AT Command ==
1382
1383 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.
1384
1385 [[image:1653358238933-385.png]]
1386
1387 (((
1388 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:
1389 )))
1390
1391 [[image:1653358355238-883.png]]
1392
1393 (((
1394 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/]]
1395 )))
1396
1397 (((
1398 AT+<CMD>?        : Help on <CMD>
1399 )))
1400
1401 (((
1402 AT+<CMD>         : Run <CMD>
1403 )))
1404
1405 (((
1406 AT+<CMD>=<value> : Set the value
1407 )))
1408
1409 (((
1410 AT+<CMD>=?       : Get the value
1411 )))
1412
1413 (((
1414 ATZ: Trig a reset of the MCU
1415 )))
1416
1417 (((
1418 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1419 )))
1420
1421 (((
1422 AT+DEUI: Get or Set the Device EUI
1423 )))
1424
1425 (((
1426 AT+DADDR: Get or Set the Device Address
1427 )))
1428
1429 (((
1430 AT+APPKEY: Get or Set the Application Key
1431 )))
1432
1433 (((
1434 AT+NWKSKEY: Get or Set the Network Session Key
1435 )))
1436
1437 (((
1438 AT+APPSKEY: Get or Set the Application Session Key
1439 )))
1440
1441 (((
1442 AT+APPEUI: Get or Set the Application EUI
1443 )))
1444
1445 (((
1446 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1447 )))
1448
1449 (((
1450 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1451 )))
1452
1453 (((
1454 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1455 )))
1456
1457 (((
1458 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1459 )))
1460
1461 (((
1462 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1463 )))
1464
1465 (((
1466 AT+RX2FQ: Get or Set the Rx2 window frequency
1467 )))
1468
1469 (((
1470 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1471 )))
1472
1473 (((
1474 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1475 )))
1476
1477 (((
1478 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1479 )))
1480
1481 (((
1482 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1483 )))
1484
1485 (((
1486 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1487 )))
1488
1489 (((
1490 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1491 )))
1492
1493 (((
1494 AT+NWKID: Get or Set the Network ID
1495 )))
1496
1497 (((
1498 AT+FCU: Get or Set the Frame Counter Uplink
1499 )))
1500
1501 (((
1502 AT+FCD: Get or Set the Frame Counter Downlink
1503 )))
1504
1505 (((
1506 AT+CLASS: Get or Set the Device Class
1507 )))
1508
1509 (((
1510 AT+JOIN: Join network
1511 )))
1512
1513 (((
1514 AT+NJS: Get OTAA Join Status
1515 )))
1516
1517 (((
1518 AT+SENDB: Send hexadecimal data along with the application port
1519 )))
1520
1521 (((
1522 AT+SEND: Send text data along with the application port
1523 )))
1524
1525 (((
1526 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1527 )))
1528
1529 (((
1530 AT+RECV: Print last received data in raw format
1531 )))
1532
1533 (((
1534 AT+VER: Get current image version and Frequency Band
1535 )))
1536
1537 (((
1538 AT+CFM: Get or Set the confirmation mode (0-1)
1539 )))
1540
1541 (((
1542 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1543 )))
1544
1545 (((
1546 AT+SNR: Get the SNR of the last received packet
1547 )))
1548
1549 (((
1550 AT+RSSI: Get the RSSI of the last received packet
1551 )))
1552
1553 (((
1554 AT+TDC: Get or set the application data transmission interval in ms
1555 )))
1556
1557 (((
1558 AT+PORT: Get or set the application port
1559 )))
1560
1561 (((
1562 AT+DISAT: Disable AT commands
1563 )))
1564
1565 (((
1566 AT+PWORD: Set password, max 9 digits
1567 )))
1568
1569 (((
1570 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1571 )))
1572
1573 (((
1574 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1575 )))
1576
1577 (((
1578 AT+CFG: Print all settings
1579
1580
1581 )))
1582
1583 == 4.2 Common AT Command Sequence ==
1584
1585 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1586
1587 (((
1588 If device has not joined network yet:
1589 )))
1590
1591 (((
1592 (% style="background-color:#dcdcdc" %)123456
1593 )))
1594
1595 (((
1596 (% style="background-color:#dcdcdc" %)AT+FDR
1597 )))
1598
1599 (((
1600 (% style="background-color:#dcdcdc" %)123456
1601 )))
1602
1603 (((
1604 (% style="background-color:#dcdcdc" %)AT+NJM=0
1605 )))
1606
1607 (((
1608 (% style="background-color:#dcdcdc" %)ATZ
1609 )))
1610
1611
1612 (((
1613 If device already joined network:
1614 )))
1615
1616 (((
1617 (% style="background-color:#dcdcdc" %)AT+NJM=0
1618 )))
1619
1620 (((
1621 (% style="background-color:#dcdcdc" %)ATZ
1622
1623
1624 )))
1625
1626 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1627
1628 (((
1629 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1630 )))
1631
1632 (((
1633 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1634 )))
1635
1636 (((
1637 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1638 )))
1639
1640 (((
1641 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1642 )))
1643
1644 (((
1645 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1646 )))
1647
1648 (((
1649 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1650 )))
1651
1652 (((
1653 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1654 )))
1655
1656 (((
1657 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1658 )))
1659
1660 (((
1661 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1662 )))
1663
1664 (((
1665 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1666 )))
1667
1668 (((
1669 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1670 )))
1671
1672 (((
1673 (% 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.
1674 )))
1675
1676 (((
1677 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1678 )))
1679
1680 (((
1681 (% style="color:red" %)**Note:**
1682 )))
1683
1684 (((
1685 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1686 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1687 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.
1688 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
1689 )))
1690
1691 (((
1692 [[image:1653359097980-169.png||height="188" width="729"]]
1693 )))
1694
1695 (((
1696
1697 )))
1698
1699 === 4.2.3 Change to Class A ===
1700
1701 If sensor JOINED
1702 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1703 ATZ
1704
1705
1706 = 5. FAQ =
1707
1708 == 5.1 How to upgrade the image? ==
1709
1710 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1711
1712 * Support new features
1713 * For bug fix
1714 * Change LoRaWAN bands.
1715 Below shows the hardware connection for how to upload an image to the LT:
1716 * [[image:1653359603330-121.png]]
1717
1718 (((
1719 **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]].
1720 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1721 **Step3: **Open flashloader; choose the correct COM port to update.
1722 **For LT-22222-L**:
1723 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.
1724 )))
1725
1726 [[image:image-20220524103407-12.png]]
1727
1728 [[image:image-20220524103429-13.png]]
1729
1730 [[image:image-20220524104033-15.png]]
1731
1732 (% 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:
1733
1734 [[image:1653360054704-518.png||height="186" width="745"]]
1735
1736
1737 (((
1738 (((
1739 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1740 )))
1741 )))
1742
1743 (((
1744 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1745
1746
1747 )))
1748
1749 (((
1750 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1751 )))
1752
1753 (((
1754 (((
1755 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1756 )))
1757 )))
1758
1759 (((
1760 (((
1761 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1762 )))
1763 )))
1764
1765 (((
1766 (% 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.
1767 )))
1768
1769 (((
1770 [[image:1653360231087-571.png||height="401" width="727"]]
1771 )))
1772
1773 (((
1774 (% 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.
1775 )))
1776
1777 (((
1778 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1779 )))
1780
1781 (((
1782 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1783 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1784 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1785 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1786 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1787 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1788 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1789 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1790 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1791 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1792 )))
1793
1794 (((
1795 As shown in below:
1796 )))
1797
1798 [[image:1653360498588-932.png||height="485" width="726"]]
1799
1800
1801 == 5.4 Can I see counting event in Serial? ==
1802
1803 (((
1804 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.
1805
1806
1807 )))
1808
1809 (((
1810 = 6. Trouble Shooting =
1811 )))
1812
1813 (((
1814 (((
1815 == 6.1 Downlink doesn’t work, how to solve it? ==
1816 )))
1817 )))
1818
1819 (((
1820 Please see this link for how to debug: [[LoRaWAN Communication Debug>>LoRaWAN Communication Debug||anchor="H5.1Howitwork"]]
1821
1822 [[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H5.1Howitwork>>http://wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H5.1Howitwork]]
1823
1824
1825 )))
1826
1827 (((
1828 == 6.2 Have trouble to upload image. ==
1829 )))
1830
1831 (((
1832 See this link for trouble shooting:
1833
1834 [[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/>>http://wiki1.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/]]
1835 )))
1836
1837 (((
1838
1839 )))
1840
1841 (((
1842 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1843 )))
1844
1845 (((
1846 It might be about the channels mapping. Please see this link for detail:
1847
1848 [[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H2.NoticeofUS9152FCN4702FAU915Frequencyband>>http://wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H2.NoticeofUS9152FCN4702FAU915Frequencyband]]
1849 )))
1850
1851 (((
1852
1853 )))
1854
1855 (((
1856 = 7. Order Info =
1857 )))
1858
1859 (((
1860 (((
1861 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1862 )))
1863 )))
1864
1865 (((
1866 (((
1867 (% style="color:#4f81bd" %)**XXX:**
1868 )))
1869 )))
1870
1871 (((
1872 * (((
1873 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1874 )))
1875 )))
1876
1877 (((
1878 * (((
1879 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1880 )))
1881 )))
1882
1883 (((
1884 * (((
1885 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1886 )))
1887 )))
1888
1889 (((
1890 * (((
1891 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1892 )))
1893 )))
1894
1895 (((
1896 * (((
1897 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1898 )))
1899 )))
1900
1901 (((
1902 * (((
1903 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1904 )))
1905 )))
1906
1907 (((
1908 * (((
1909 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1910 )))
1911 )))
1912
1913 (((
1914 * (((
1915 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1916 )))
1917 )))
1918
1919 (((
1920 * (((
1921 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1922
1923
1924 )))
1925
1926 = 8. Packing Info =
1927 )))
1928
1929 (((
1930 (((
1931 **Package Includes**:
1932 )))
1933 )))
1934
1935 (((
1936 (((
1937 * LT-22222-L I/O Controller x 1
1938 * Stick Antenna for LoRa RF part x 1
1939 * Bracket for controller x1
1940 * Program cable x 1
1941 )))
1942 )))
1943
1944 (((
1945 (((
1946 **Dimension and weight**:
1947 )))
1948 )))
1949
1950 (((
1951 (((
1952 * Device Size: 13.5 x 7 x 3 cm
1953 * Device Weight: 105g
1954 * Package Size / pcs : 14.5 x 8 x 5 cm
1955 * Weight / pcs : 170g
1956
1957
1958 )))
1959 )))
1960
1961 (((
1962 = 9. Support =
1963 )))
1964
1965 * (((
1966 (((
1967 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.
1968 )))
1969 )))
1970 * (((
1971 (((
1972 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
1973 )))
1974 )))
1975
1976 (((
1977 (((
1978 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1979
1980
1981 )))
1982
1983 (((
1984 = 10. Reference​​​​​ =
1985
1986 * Product Page:
1987
1988 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]]
1989
1990 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1991 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1992 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1993 )))
1994 )))

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