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Last modified by Mengting Qiu on 2025/06/04 18:42
From version 82.9
edited by Xiaoling
on 2022/06/20 11:19
Change comment: There is no comment for this version
To version 80.2
edited by Xiaoling
on 2022/06/10 10:19
Change comment: There is no comment for this version

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19 19  == 1.1 What is LT Series I/O Controller ==
20 20  
21 21  (((
22 -
23 -
24 24  The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
25 25  )))
26 26  
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165 165  )))
166 166  * (((
167 167  Packet engine up to 256 bytes with CRC.
166 +)))
168 168  
169 169  
170 170  
171 -
172 -)))
173 173  
174 174  == 1.3 Features ==
175 175  
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211 211  
212 212  
213 213  
211 +
214 214  = 2. Power ON Device =
215 215  
216 216  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.
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291 291  * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
292 292  * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
293 293  
294 -
295 -
296 -
297 297  === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
298 298  
299 299  The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
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332 332  * [1] RO1 relay channel is close and the RO1 LED is ON.
333 333  * [0] RO2 relay channel is open and RO2 LED is OFF;
334 334  
335 -
336 336  **LT22222-L:**
337 337  
338 338  * [1] DI2 channel is high input and DI2 LED is ON;
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348 348  ** DO1 is high in case there is load between DO1 and V+.
349 349  ** DO1 LED is off in both case
350 350  
351 -
352 -
353 -
354 354  === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
355 355  
356 356  
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788 788  
789 789  * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
790 790  
782 +
791 791  === 3.4.1 Common Commands ===
792 792  
793 793  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]]
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2019 2019  )))
2020 2020  
2021 2021  (((
2022 -== 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2014 +
2023 2023  
2024 -If the device is not shut down, but directly powered off.
2025 -
2026 -It will default that this is a power-off state.
2027 -
2028 -In modes 2 to 5, DO RO status and pulse count are saved in flash.
2029 -
2030 -After restart, the status before power failure will be read from flash.
2031 -
2032 2032  = 6. Trouble Shooting =
2033 2033  )))
2034 2034