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Version 66.23 by Xiaoling on 2022/05/24 13:57
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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 == 1.2  Specifications ==
47
48 (((
49 **Hardware System:**
50 )))
51
52 * (((
53 STM32L072CZT6 MCU
54 )))
55 * (((
56 SX1276/78 Wireless Chip 
57 )))
58 * (((
59 (((
60 Power Consumption:
61 )))
62
63 * (((
64 Idle: 4mA@12v
65 )))
66 * (((
67 20dB Transmit: 34mA@12v
68 )))
69 )))
70
71 (((
72 **Interface for Model: LT22222-L:**
73 )))
74
75 * (((
76 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
77 )))
78 * (((
79 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
80 )))
81 * (((
82 2 x Relay Output (5A@250VAC / 30VDC)
83 )))
84 * (((
85 2 x 0~~20mA Analog Input (res:0.01mA)
86 )))
87 * (((
88 2 x 0~~30V Analog Input (res:0.01v)
89 )))
90 * (((
91 Power Input 7~~ 24V DC. 
92 )))
93
94 (((
95 **LoRa Spec:**
96 )))
97
98 * (((
99 (((
100 Frequency Range:
101 )))
102
103 * (((
104 Band 1 (HF): 862 ~~ 1020 Mhz
105 )))
106 * (((
107 Band 2 (LF): 410 ~~ 528 Mhz
108 )))
109 )))
110 * (((
111 168 dB maximum link budget.
112 )))
113 * (((
114 +20 dBm - 100 mW constant RF output vs.
115 )))
116 * (((
117 +14 dBm high efficiency PA.
118 )))
119 * (((
120 Programmable bit rate up to 300 kbps.
121 )))
122 * (((
123 High sensitivity: down to -148 dBm.
124 )))
125 * (((
126 Bullet-proof front end: IIP3 = -12.5 dBm.
127 )))
128 * (((
129 Excellent blocking immunity.
130 )))
131 * (((
132 Low RX current of 10.3 mA, 200 nA register retention.
133 )))
134 * (((
135 Fully integrated synthesizer with a resolution of 61 Hz.
136 )))
137 * (((
138 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
139 )))
140 * (((
141 Built-in bit synchronizer for clock recovery.
142 )))
143 * (((
144 Preamble detection.
145 )))
146 * (((
147 127 dB Dynamic Range RSSI.
148 )))
149 * (((
150 Automatic RF Sense and CAD with ultra-fast AFC.
151 )))
152 * (((
153 Packet engine up to 256 bytes with CRC.
154 )))
155
156 == 1.3 Features ==
157
158 * LoRaWAN Class A & Class C protocol
159 * Optional Customized LoRa Protocol
160 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
161 * AT Commands to change parameters
162 * Remote configure parameters via LoRa Downlink
163 * Firmware upgradable via program port
164 * Counting
165
166 == 1.4  Applications ==
167
168 * Smart Buildings & Home Automation
169 * Logistics and Supply Chain Management
170 * Smart Metering
171 * Smart Agriculture
172 * Smart Cities
173 * Smart Factory
174
175 == 1.5 Hardware Variants ==
176
177 (% border="1" style="background-color:#f7faff; width:500px" %)
178 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
179 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
180 * 2 x Digital Input (Bi-direction)
181 * 2 x Digital Output
182 * 2 x Relay Output (5A@250VAC / 30VDC)
183 * 2 x 0~~20mA Analog Input (res:0.01mA)
184 * 2 x 0~~30V Analog Input (res:0.01v)
185 * 1 x Counting Port
186 )))
187
188 = 2. Power ON Device =
189
190 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.
191
192 (((
193 PWR will on when device is properly powered.
194 )))
195
196 [[image:1653297104069-180.png]]
197
198 = 3. Operation Mode =
199
200 == 3.1 How it works? ==
201
202 (((
203 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. 
204 )))
205
206 (((
207 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>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H4.UseATCommand]] to set the keys in the devices.
208 )))
209
210 (((
211 3.2 Example to join LoRaWAN network
212 )))
213
214 (((
215 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. 
216 )))
217
218 [[image:image-20220523172350-1.png||height="266" width="864"]]
219
220
221 (((
222 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:
223 )))
224
225 (((
226 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
227 )))
228
229 (((
230 Each LT is shipped with a sticker with the default device EUI as below:
231 )))
232
233 [[image:1653297924498-393.png]]
234
235 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
236
237 Add APP EUI in the application.
238
239 [[image:1653297955910-247.png||height="321" width="716"]]
240
241 Add APP KEY and DEV EUI
242
243 [[image:1653298023685-319.png]]
244
245 (((
246 **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.
247 )))
248
249 [[image:1653298044601-602.png||height="405" width="709"]]
250
251 == 3.3 Uplink Payload ==
252
253 There are five working modes + one interrupt mode on LT for different type application:
254
255 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
256 * **MOD2**: Double DI Counting + DO + RO
257 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
258 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
259 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
260 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
261
262 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
263
264 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
265
266 [[image:image-20220523174024-3.png]]
267
268 (((
269 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
270 )))
271
272 [[image:image-20220523174254-4.png]]
273
274 * RO is for relay. ROx=1 : close，ROx=0 always open.
275 * DI is for digital input. DIx=1: high or float, DIx=0: low.
276 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
277
278 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
279
280 For example if payload is: [[image:image-20220523175847-2.png]]
281
282 **The value for the interface is:  **
283
284 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
285
286 AVI2 channel voltage is 0x04AC/1000=1.196V
287
288 ACI1 channel current is 0x1310/1000=4.880mA
289
290 ACI2 channel current is 0x1300/1000=4.864mA
291
292 The last byte 0xAA= 10101010(B) means
293
294 * [1] RO1 relay channel is close and the RO1 LED is ON.
295 * [0] RO2 relay channel is open and RO2 LED is OFF;
296
297 **LT22222-L:**
298
299 * [1] DI2 channel is high input and DI2 LED is ON;
300 * [0] DI1 channel is low input;
301
302 * [0] DO3 channel output state
303 ** DO3 is float in case no load between DO3 and V+.;
304 ** DO3 is high in case there is load between DO3 and V+.
305 ** DO3 LED is off in both case
306 * [1] DO2 channel output is low and DO2 LED is ON.
307 * [0] DO1 channel output state
308 ** DO1 is float in case no load between DO1 and V+.;
309 ** DO1 is high in case there is load between DO1 and V+.
310 ** DO1 LED is off in both case
311
312 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
313
314 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
315
316 (((
317 Total : 11 bytes payload
318 )))
319
320 [[image:image-20220523180452-3.png]]
321
322 (((
323 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
324 )))
325
326 [[image:image-20220523180506-4.png]]
327
328 * RO is for relay. ROx=1 : close，ROx=0 always open.
329 * FIRST: Indicate this is the first packet after join network.
330 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
331
332 (((
333 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
334 )))
335
336 (((
337 **To use counting mode, please run:**
338 )))
339
340 (% class="box infomessage" %)
341 (((
342 (((
343 **AT+MOD=2**
344 )))
345 )))
346
347 (% class="box infomessage" %)
348 (((
349 (((
350 **ATZ**
351 )))
352 )))
353
354 (((
355 (% style="color:#4f81bd" %)**AT Commands for counting:**
356 )))
357
358 (((
359 **For LT22222-L:**
360 )))
361
362 (% class="box infomessage" %)
363 (((
364 (((
365 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
366 )))
367 )))
368
369 (% class="box infomessage" %)
370 (((
371 (((
372 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
373 )))
374 )))
375
376 (% class="box infomessage" %)
377 (((
378 (((
379 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
380 )))
381 )))
382
383 (% class="box infomessage" %)
384 (((
385 (((
386 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
387 )))
388 )))
389
390 (% class="box infomessage" %)
391 (((
392 (((
393 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
394 )))
395 )))
396
397 (% class="box infomessage" %)
398 (((
399 (((
400 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
401 )))
402 )))
403
404 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
405
406 **LT22222-L**: This mode the DI1 is used as a counting pin.
407
408 [[image:image-20220523181246-5.png]]
409
410 (((
411 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
412 )))
413
414 [[image:image-20220523181301-6.png]]
415
416 * RO is for relay. ROx=1 : close，ROx=0 always open.
417 * FIRST: Indicate this is the first packet after join network.
418 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
419
420 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
421
422 **To use counting mode, please run:**
423
424 (% class="box infomessage" %)
425 (((
426 **AT+MOD=3**
427 )))
428
429 (% class="box infomessage" %)
430 (((
431 **ATZ**
432 )))
433
434 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
435
436 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
437
438 **LT22222-L**: This mode the DI1 is used as a counting pin.
439
440 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.
441
442 [[image:image-20220523181903-8.png]]
443
444 (((
445 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
446 )))
447
448 [[image:image-20220523181727-7.png]]
449
450 * RO is for relay. ROx=1 : close，ROx=0 always open.
451 * FIRST: Indicate this is the first packet after join network.
452 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
453
454 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
455
456 **To use this mode, please run:**
457
458 (% class="box infomessage" %)
459 (((
460 **AT+MOD=4**
461 )))
462
463 (% class="box infomessage" %)
464 (((
465 **ATZ**
466 )))
467
468
469 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
470
471 **Plus below command for AVI1 Counting:**
472
473 (% class="box infomessage" %)
474 (((
475 **AT+SETCNT=3,60   (set AVI Count to 60)**
476 )))
477
478 (% class="box infomessage" %)
479 (((
480 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
481 )))
482
483 (% class="box infomessage" %)
484 (((
485 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
486 )))
487
488 (% class="box infomessage" %)
489 (((
490 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
491 )))
492
493 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
494
495 **LT22222-L**: This mode the DI1 is used as a counting pin.
496
497 [[image:image-20220523182334-9.png]]
498
499 (((
500 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
501 )))
502
503 * RO is for relay. ROx=1 : close，ROx=0 always open.
504 * FIRST: Indicate this is the first packet after join network.
505 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
506
507 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
508
509 **To use this mode, please run:**
510
511 (% class="box infomessage" %)
512 (((
513 **AT+MOD=5**
514 )))
515
516 (% class="box infomessage" %)
517 (((
518 **ATZ**
519 )))
520
521 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
522
523 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
524
525 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
526
527 For example, if user has configured below commands:
528
529 * **AT+MOD=1 ** **~-~->** The normal working mode
530 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
531
532 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
533
534 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
535 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.**
536
537 **AT Command to set Trigger Condition**:
538
539 (% style="color:#4f81bd" %)**Trigger base on voltage**:
540
541 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
542
543 **Example:**
544
545 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)
546
547 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
548
549 (% style="color:#4f81bd" %)**Trigger base on current**:
550
551 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
552
553 **Example:**
554
555 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
556
557 (% style="color:#4f81bd" %)**Trigger base on DI status**:
558
559 DI status trigger Flag.
560
561 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
562
563 **Example:**
564
565 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
566
567
568 **Downlink Command to set Trigger Condition**
569
570 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
571
572 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
573
574 AA: Code for this downlink Command:
575
576 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
577
578 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
579
580 yy2 yy2: AC1 or AV1 high limit.
581
582 yy3 yy3: AC2 or AV2 low limit.
583
584 Yy4 yy4: AC2 or AV2 high limit.
585
586 **Example1**: AA 00 13 88 00 00 00 00 00 00
587
588 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
589
590 **Example2**: AA 02 01 00
591
592 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
593
594 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
595
596 MOD6 Payload : total 11 bytes payload
597
598 [[image:image-20220524085923-1.png]]
599
600 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
601
602 [[image:image-20220524090106-2.png]]
603
604 * Each bits shows if the corresponding trigger has been configured.
605
606 **Example:**
607
608 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
609
610
611 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
612
613 [[image:image-20220524090249-3.png]]
614
615 * Each bits shows which status has been trigger on this uplink.
616
617 **Example:**
618
619 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
620
621
622 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
623
624 [[image:image-20220524090456-4.png]]
625
626 * Each bits shows which status has been trigger on this uplink.
627
628 **Example:**
629
630 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
631
632 00000101: Means both DI1 and DI2 trigger are enabled.
633
634
635 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
636
637 Downlink command to poll MOD6 status:
638
639 **AB 06**
640
641 When device got this command, it will send the MOD6 payload.
642
643 === 3.3.7 Payload Decoder ===
644
645 (((
646 **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/]]
647 )))
648
649 == 3.4 ​Configure LT via AT or Downlink ==
650
651 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
652
653 (((
654 There are two kinds of Commands:
655 )))
656
657 * (% 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
658
659 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
660
661 === 3.4.1 Common Commands ===
662
663 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>>http://8.211.40.43:8080/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]
664
665 === 3.4.2 Sensor related commands ===
666
667 ==== 3.4.2.1 Set Transmit Interval ====
668
669 Set device uplink interval.
670
671 * AT Command:
672
673 (% class="box infomessage" %)
674 (((
675 **AT+TDC=N **
676 )))
677
678 **Example: **AT+TDC=30000. Means set interval to 30 seconds
679
680 * Downlink Payload (prefix 0x01):
681
682 (% class="box infomessage" %)
683 (((
684 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
685 )))
686
687 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
688
689 Set work mode.
690
691 * AT Command:
692
693 (% class="box infomessage" %)
694 (((
695 **AT+MOD=N  **
696 )))
697
698 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
699
700 * Downlink Payload (prefix 0x0A):
701
702 (% class="box infomessage" %)
703 (((
704 **0x0A aa     ~/~/ Same as AT+MOD=aa**
705 )))
706
707 ==== 3.4.2.3 Poll an uplink ====
708
709 * AT Command:
710
711 There is no AT Command to poll uplink
712
713 * Downlink Payload (prefix 0x08):
714
715 (% class="box infomessage" %)
716 (((
717 **0x08 FF     ~/~/ Poll an uplink,**
718 )))
719
720 **Example**: 0x08FF, ask device to send an Uplink
721
722 ==== 3.4.2.4 Enable Trigger Mode ====
723
724 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]]
725
726 * AT Command:
727
728 (% class="box infomessage" %)
729 (((
730 **AT+ADDMOD6=1 or 0**
731 )))
732
733 1: Enable Trigger Mode
734
735 0: Disable Trigger Mode
736
737 * Downlink Payload (prefix 0x0A 06):
738
739 (% class="box infomessage" %)
740 (((
741 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
742 )))
743
744 ==== 3.4.2.5 Poll trigger settings ====
745
746 Poll trigger settings,
747
748 * AT Command:
749
750 There is no AT Command for this feature.
751
752 * Downlink Payload (prefix 0x AB 06):
753
754 (% class="box infomessage" %)
755 (((
756 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
757 )))
758
759 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
760
761 Enable Disable DI1/DI2/DI2 as trigger,
762
763 * AT Command:
764
765 (% class="box infomessage" %)
766 (((
767 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
768 )))
769
770 **Example:**
771
772 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
773
774 * Downlink Payload (prefix 0xAA 02):
775
776 (% class="box infomessage" %)
777 (((
778 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
779 )))
780
781 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
782
783 Set DI1 or DI3(for LT-33222-L) trigger.
784
785 * AT Command:
786
787 (% class="box infomessage" %)
788 (((
789 **AT+TRIG1=a,b**
790 )))
791
792 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
793
794 b : delay timing.
795
796 **Example:**
797
798 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
799
800 * Downlink Payload (prefix 0x09 01 ):
801
802 (% class="box infomessage" %)
803 (((
804 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
805 )))
806
807 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
808
809 Set DI2 trigger.
810
811 * AT Command:
812
813 (% class="box infomessage" %)
814 (((
815 **AT+TRIG2=a,b**
816 )))
817
818 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
819
820 b : delay timing.
821
822 **Example:**
823
824 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
825
826 * Downlink Payload (prefix 0x09 02 ):
827
828 (% class="box infomessage" %)
829 (((
830 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
831 )))
832
833 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
834
835 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]]
836
837 * AT Command:
838
839 (% class="box infomessage" %)
840 (((
841 **AT+ACLIM. **
842 )))
843
844 * Downlink Payload (prefix 0xAA 01 ):
845
846 (% class="box infomessage" %)
847 (((
848 **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]]**
849 )))
850
851 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
852
853 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]]
854
855 * AT Command:
856
857 (% class="box infomessage" %)
858 (((
859 **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]]**
860 )))
861
862 * Downlink Payload (prefix 0xAA 00 ):
863
864 (% class="box infomessage" %)
865 (((
866 **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]] **
867 )))
868
869 ==== 3.4.2.11 Trigger – Set minimum interval ====
870
871 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
872
873 * AT Command:
874
875 (% class="box infomessage" %)
876 (((
877 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
878 )))
879
880 * Downlink Payload (prefix 0xAC ):
881
882 (% class="box infomessage" %)
883 (((
884 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
885 )))
886
887 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
888
889 * AT Command:
890
891 There is no AT Command to control Digital Output
892
893 * Downlink Payload (prefix 0x02):
894
895 (% class="box infomessage" %)
896 (((
897 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
898 )))
899
900 (((
901 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
902 )))
903
904 (((
905 01: Low,  00: High ,  11: No action
906 )))
907
908 [[image:image-20220524092754-5.png]]
909
910 (((
911 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
912 )))
913
914 (((
915 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
916 )))
917
918
919 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
920
921 * AT Command:
922
923 There is no AT Command to control Digital Output
924
925 * Downlink Payload (prefix 0xA9):
926
927 (% class="box infomessage" %)
928 (((
929 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
930 )))
931
932 This is to control the digital output time of DO pin. Include four bytes:
933
934 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
935
936 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
937
938 01: DO pins will change back to original state after timeout.
939
940 00: DO pins will change to an inverter state after timeout 
941
942 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
943
944 [[image:image-20220524093238-6.png]]
945
946 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
947
948 [[image:image-20220524093328-7.png]]
949
950 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
951
952 [[image:image-20220524093351-8.png]]
953
954 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
955
956 Latching time. Unit: ms
957
958 Device will upload a packet if downlink code executes successfully.
959
960 **Example payload:**
961
962 **~1. A9 01 01 01 01 07 D0**
963
964 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
965
966 **2. A9 01 00 01 11 07 D0**
967
968 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
969
970 **3. A9 00 00 00 00 07 D0**
971
972 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
973
974 **4. A9 00 11 01 00 07 D0**
975
976 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
977
978
979 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
980
981 * AT Command:
982
983 There is no AT Command to control Relay Output
984
985 * Downlink Payload (prefix 0x03):
986
987 (% class="box infomessage" %)
988 (((
989 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
990 )))
991
992 (((
993 If payload = 0x030100, it means set RO1 to close and RO2 to open.
994 )))
995
996 (((
997 01: Close ,  00: Open , 11: No action
998 )))
999
1000 (((
1001 [[image:image-20220524093724-9.png]]
1002 )))
1003
1004 Device will upload a packet if downlink code executes successfully.
1005
1006
1007 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1008
1009 * AT Command:
1010
1011 There is no AT Command to control Relay Output
1012
1013 * Downlink Payload (prefix 0x05):
1014
1015 (% class="box infomessage" %)
1016 (((
1017 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1018 )))
1019
1020 This is to control the relay output time of relay. Include four bytes:
1021
1022 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1023
1024 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1025
1026 01: Relays will change back to original state after timeout.
1027
1028 00: Relays will change to an inverter state after timeout
1029
1030 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1031
1032 [[image:image-20220524093831-10.png]]
1033
1034 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1035
1036 Device will upload a packet if downlink code executes successfully.
1037
1038 **Example payload:**
1039
1040 **~1. 05 01 11 07 D0**
1041
1042 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1043
1044 **2. 05 01 10 07 D0**
1045
1046 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1047
1048 **3. 05 00 01 07 D0**
1049
1050 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1051
1052 **4. 05 00 00 07 D0**
1053
1054 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1055
1056
1057 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1058
1059 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]]
1060
1061 * AT Command:
1062
1063 (% class="box infomessage" %)
1064 (((
1065 **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]]**
1066 )))
1067
1068 * Downlink Payload (prefix 0xA5):
1069
1070 (% class="box infomessage" %)
1071 (((
1072 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1073 )))
1074
1075 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1076
1077 * AT Command:
1078
1079 (% class="box infomessage" %)
1080 (((
1081 **AT+SETCNT=aa,(bb cc dd ee) **
1082 )))
1083
1084 aa: 1: Set count1,
1085
1086 2: Set count2,
1087
1088 3: Set AV1 count
1089
1090 Bb cc dd ee: number to be set
1091
1092 * Downlink Payload (prefix 0xA8):
1093
1094 (% class="box infomessage" %)
1095 (((
1096 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1097 )))
1098
1099 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1100
1101 Clear counting for counting mode
1102
1103 * AT Command:
1104
1105 (% class="box infomessage" %)
1106 (((
1107 **AT+CLRCOUNT ~/~/ clear all counting**
1108 )))
1109
1110 * Downlink Payload (prefix 0xA6):
1111
1112 (% class="box infomessage" %)
1113 (((
1114 **0x A6 01     ~/~/ clear all counting,**
1115 )))
1116
1117 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1118
1119 * AT Command:
1120
1121 (% class="box infomessage" %)
1122 (((
1123 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1124 )))
1125
1126 * Downlink Payload (prefix 0xA7):
1127
1128 (% class="box infomessage" %)
1129 (((
1130 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1131 )))
1132
1133 range: aa bb cc:0 to 16777215,  (unit:second)
1134
1135 == 3.5 Integrate with Mydevice ==
1136
1137 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:
1138
1139 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1140
1141 **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:
1142
1143 [[image:1653356737703-362.png||height="232" width="732"]]
1144
1145 [[image:image-20220524094641-11.png||height="390" width="723"]]
1146
1147
1148 [[image:image-20220524094641-12.png||height="402" width="718"]]
1149
1150 **Step 3**: Create an account or log in Mydevices.
1151
1152 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1153
1154 Search under The things network
1155
1156 [[image:1653356838789-523.png||height="337" width="740"]]
1157
1158 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1159
1160 [[image:image-20220524094909-1.png||height="335" width="729"]]
1161
1162 [[image:image-20220524094909-2.png||height="337" width="729"]]
1163
1164 [[image:image-20220524094909-3.png||height="338" width="727"]]
1165
1166 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1167
1168 [[image:image-20220524094909-5.png||height="341" width="734"]]
1169
1170 == 3.6 Interface Detail ==
1171
1172 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1173
1174 Support NPN Type sensor
1175
1176 [[image:1653356991268-289.png]]
1177
1178 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1179
1180 (((
1181 The DI port of LT-22222-L can support NPN or PNP output sensor.
1182 )))
1183
1184 (((
1185 (((
1186 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
1187 )))
1188 )))
1189
1190 [[image:1653357170703-587.png]]
1191
1192 (((
1193 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1194 )))
1195
1196
1197 **Example1**: Connect to a Low active sensor.
1198
1199 This type of sensor will output a low signal GND when active.
1200
1201 * Connect sensor’s output to DI1-
1202 * Connect sensor’s VCC to DI1+.
1203
1204 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1205
1206 //IF// = DI1+ / 1K.
1207
1208 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1209
1210
1211 **Example2**: Connect to a High active sensor.
1212
1213 This type of sensor will output a high signal (example 24v) when active.
1214
1215 * Connect sensor’s output to DI1+
1216 * Connect sensor’s GND DI1-.
1217
1218 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1219
1220 [[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:/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.**
1221
1222 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:/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.
1223
1224
1225 **Example3**: Connect to a 220v high active sensor.
1226
1227 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1228
1229 * Connect sensor’s output to DI1+ with a serial 50K resistor
1230 * Connect sensor’s GND DI1-.
1231
1232 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1233
1234 [[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:/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.**
1235
1236 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.
1237
1238 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1239
1240 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1241
1242 [[image:1653357531600-905.png]]
1243
1244 === 3.6.4 Analog Input Interface ===
1245
1246 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:
1247
1248 **AC2 = (IN2 voltage )/12**
1249
1250 [[image:1653357592296-182.png]]
1251
1252 Example to connect a 4~~20mA sensor
1253
1254 We take the wind speed sensor as an example for reference only.
1255
1256 Specifications of the wind speed sensor:
1257
1258 Red:12~~24v
1259
1260 Yellow:4~~20mA
1261
1262 Black:GND
1263
1264
1265 Connection diagram:
1266
1267 [[image:1653357640609-758.png]]
1268
1269 [[image:1653357648330-671.png||height="155" width="733"]]
1270
1271 === 3.6.5 Relay Output ===
1272
1273 (((
1274 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:
1275 )))
1276
1277 [[image:image-20220524100215-9.png]]
1278
1279 [[image:image-20220524100215-10.png||height="382" width="723"]]
1280
1281 == 3.7 LEDs Indicators ==
1282
1283 [[image:image-20220524100748-11.png]]
1284
1285 = 4. Use AT Command =
1286
1287 == 4.1 Access AT Command ==
1288
1289 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.
1290
1291 [[image:1653358238933-385.png]]
1292
1293 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:
1294
1295 [[image:1653358355238-883.png]]
1296
1297 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/]]
1298
1299 (((
1300 AT+<CMD>?        : Help on <CMD>
1301 )))
1302
1303 (((
1304 AT+<CMD>         : Run <CMD>
1305 )))
1306
1307 (((
1308 AT+<CMD>=<value> : Set the value
1309 )))
1310
1311 (((
1312 AT+<CMD>=?       : Get the value
1313 )))
1314
1315 (((
1316 ATZ: Trig a reset of the MCU
1317 )))
1318
1319 (((
1320 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1321 )))
1322
1323 (((
1324 AT+DEUI: Get or Set the Device EUI
1325 )))
1326
1327 (((
1328 AT+DADDR: Get or Set the Device Address
1329 )))
1330
1331 (((
1332 AT+APPKEY: Get or Set the Application Key
1333 )))
1334
1335 (((
1336 AT+NWKSKEY: Get or Set the Network Session Key
1337 )))
1338
1339 (((
1340 AT+APPSKEY: Get or Set the Application Session Key
1341 )))
1342
1343 (((
1344 AT+APPEUI: Get or Set the Application EUI
1345 )))
1346
1347 (((
1348 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1349 )))
1350
1351 (((
1352 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1353 )))
1354
1355 (((
1356 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1357 )))
1358
1359 (((
1360 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1361 )))
1362
1363 (((
1364 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1365 )))
1366
1367 (((
1368 AT+RX2FQ: Get or Set the Rx2 window frequency
1369 )))
1370
1371 (((
1372 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1373 )))
1374
1375 (((
1376 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1377 )))
1378
1379 (((
1380 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1381 )))
1382
1383 (((
1384 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1385 )))
1386
1387 (((
1388 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1389 )))
1390
1391 (((
1392 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1393 )))
1394
1395 (((
1396 AT+NWKID: Get or Set the Network ID
1397 )))
1398
1399 (((
1400 AT+FCU: Get or Set the Frame Counter Uplink
1401 )))
1402
1403 (((
1404 AT+FCD: Get or Set the Frame Counter Downlink
1405 )))
1406
1407 (((
1408 AT+CLASS: Get or Set the Device Class
1409 )))
1410
1411 (((
1412 AT+JOIN: Join network
1413 )))
1414
1415 (((
1416 AT+NJS: Get OTAA Join Status
1417 )))
1418
1419 (((
1420 AT+SENDB: Send hexadecimal data along with the application port
1421 )))
1422
1423 (((
1424 AT+SEND: Send text data along with the application port
1425 )))
1426
1427 (((
1428 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1429 )))
1430
1431 (((
1432 AT+RECV: Print last received data in raw format
1433 )))
1434
1435 (((
1436 AT+VER: Get current image version and Frequency Band
1437 )))
1438
1439 (((
1440 AT+CFM: Get or Set the confirmation mode (0-1)
1441 )))
1442
1443 (((
1444 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1445 )))
1446
1447 (((
1448 AT+SNR: Get the SNR of the last received packet
1449 )))
1450
1451 (((
1452 AT+RSSI: Get the RSSI of the last received packet
1453 )))
1454
1455 (((
1456 AT+TDC: Get or set the application data transmission interval in ms
1457 )))
1458
1459 (((
1460 AT+PORT: Get or set the application port
1461 )))
1462
1463 (((
1464 AT+DISAT: Disable AT commands
1465 )))
1466
1467 (((
1468 AT+PWORD: Set password, max 9 digits
1469 )))
1470
1471 (((
1472 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1473 )))
1474
1475 (((
1476 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1477 )))
1478
1479 (((
1480 AT+CFG: Print all settings
1481 )))
1482
1483 == 4.2 Common AT Command Sequence ==
1484
1485 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1486
1487 (((
1488 If device has not joined network yet:
1489 )))
1490
1491 (((
1492 (% style="background-color:#dcdcdc" %)123456
1493 )))
1494
1495 (((
1496 (% style="background-color:#dcdcdc" %)AT+FDR
1497 )))
1498
1499 (((
1500 (% style="background-color:#dcdcdc" %)123456
1501 )))
1502
1503 (((
1504 (% style="background-color:#dcdcdc" %)AT+NJM=0
1505 )))
1506
1507 (((
1508 (% style="background-color:#dcdcdc" %)ATZ
1509 )))
1510
1511
1512 (((
1513 If device already joined network:
1514 )))
1515
1516 (((
1517 (% style="background-color:#dcdcdc" %)AT+NJM=0
1518 )))
1519
1520 (((
1521 (% style="background-color:#dcdcdc" %)ATZ
1522 )))
1523
1524 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1525
1526 (((
1527 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1528 )))
1529
1530 (((
1531 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1532 )))
1533
1534 (((
1535 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1536 )))
1537
1538 (((
1539 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1540 )))
1541
1542 (((
1543 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1544 )))
1545
1546 (((
1547 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1548 )))
1549
1550 (((
1551 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1552 )))
1553
1554 (((
1555 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1556 )))
1557
1558 (((
1559 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1560 )))
1561
1562 (((
1563 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1564 )))
1565
1566 (((
1567 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1568 )))
1569
1570 (((
1571 (% 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.
1572 )))
1573
1574 (((
1575 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1576 )))
1577
1578 (((
1579 (% style="color:red" %)**Note:**
1580 )))
1581
1582 (((
1583 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1584 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1585 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.
1586 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
1587 )))
1588
1589 (((
1590 [[image:1653359097980-169.png||height="188" width="729"]]
1591 )))
1592
1593 (((
1594
1595 )))
1596
1597 === 4.2.3 Change to Class A ===
1598
1599 If sensor JOINED
1600 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1601 ATZ
1602
1603 = 5. FAQ =
1604
1605 == 5.1 How to upgrade the image? ==
1606
1607 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1608
1609 * Support new features
1610 * For bug fix
1611 * Change LoRaWAN bands.
1612 Below shows the hardware connection for how to upload an image to the LT:
1613 * [[image:1653359603330-121.png]]
1614
1615 **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]].
1616 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1617 **Step3: **Open flashloader; choose the correct COM port to update.
1618 **For LT-22222-L**:
1619 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.
1620
1621 [[image:image-20220524103407-12.png]]
1622
1623 [[image:image-20220524103429-13.png]]
1624
1625 [[image:image-20220524104033-15.png]]
1626
1627 (% 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:
1628
1629 [[image:1653360054704-518.png||height="186" width="745"]]
1630
1631 (((
1632 (((
1633 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1634 )))
1635 )))
1636
1637 (((
1638 User can follow the introduction for [[how to upgrade image>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H5.1Howtoupgradetheimage3F]]. When download the images, choose the required image file for download.
1639 )))
1640
1641 (((
1642 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1643 )))
1644
1645 (((
1646 (((
1647 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1648 )))
1649 )))
1650
1651 (((
1652 (((
1653 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1654 )))
1655 )))
1656
1657 (((
1658 (% 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.
1659 )))
1660
1661 (((
1662 [[image:1653360231087-571.png||height="401" width="727"]]
1663 )))
1664
1665 (% 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.
1666
1667 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1668
1669 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1670 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1671 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1672 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1673 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1674 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1675 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1676 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1677 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1678 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1679
1680 As shown in below:
1681
1682 [[image:1653360498588-932.png||height="485" width="726"]]
1683
1684 == 5.4 Can I see counting event in Serial? ==
1685
1686 (((
1687 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.
1688 )))
1689
1690 (((
1691 = 6. Trouble Shooting =
1692 )))
1693
1694 (((
1695 (((
1696 == 6.1 Downlink doesn’t work, how to solve it? ==
1697 )))
1698 )))
1699
1700 (((
1701 Please see this link for how to debug:
1702
1703 [[http:~~/~~/8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/>>http://8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/]]
1704 )))
1705
1706 (((
1707 [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work]]
1708 )))
1709
1710 (((
1711 == 6.2 Have trouble to upload image. ==
1712 )))
1713
1714 (((
1715 See this link for trouble shooting:
1716 )))
1717
1718 (((
1719 [[http:~~/~~/wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting>>url:http://wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting]]
1720 )))
1721
1722 (((
1723 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1724 )))
1725
1726 (((
1727 It might be about the channels mapping. Please see this link for detail:
1728 )))
1729
1730 (((
1731 [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]
1732 )))
1733
1734 (((
1735 = 7. Order Info =
1736 )))
1737
1738 (((
1739 (((
1740 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1741 )))
1742 )))
1743
1744 (((
1745 (((
1746 (% style="color:#4f81bd" %)**XXX:**
1747 )))
1748 )))
1749
1750 * (((
1751 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1752 )))
1753 * (((
1754 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1755 )))
1756 * (((
1757 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1758 )))
1759 * (((
1760 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1761 )))
1762 * (((
1763 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1764 )))
1765 * (((
1766 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1767 )))
1768 * (((
1769 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1770 )))
1771 * (((
1772 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1773 )))
1774
1775 (((
1776 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1777
1778 = 8. Packing Info =
1779 )))
1780
1781 (((
1782 (((
1783 **Package Includes**:
1784 )))
1785 )))
1786
1787 (((
1788 (((
1789 * LT-22222-L I/O Controller x 1
1790 * Stick Antenna for LoRa RF part x 1
1791 * Bracket for controller x1
1792 * Program cable x 1
1793 )))
1794 )))
1795
1796 (((
1797 (((
1798 **Dimension and weight**:
1799 )))
1800 )))
1801
1802 (((
1803 (((
1804 * Device Size: 13.5 x 7 x 3 cm
1805 * Device Weight: 105g
1806 * Package Size / pcs : 14.5 x 8 x 5 cm
1807 * Weight / pcs : 170g
1808 )))
1809 )))
1810
1811 (((
1812 = 9. Support =
1813 )))
1814
1815 * (((
1816 (((
1817 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.
1818 )))
1819 )))
1820 * (((
1821 (((
1822 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
1823 )))
1824 )))
1825
1826 (((
1827 (((
1828 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1829 )))
1830
1831 (((
1832 = 10. Reference​​​​​ =
1833
1834 * Product Page:
1835
1836 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]]
1837
1838 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1839 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1840 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1841 )))
1842 )))