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19	19	== 1.1 What is LT Series I/O Controller ==
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22	22	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.
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	53	+
51	51	== 1.2  Specifications ==
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162	162	)))
163	163	* (((
164	164	Packet engine up to 256 bytes with CRC.
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	172	+)))
	173	+
168	168	== 1.3 Features ==
169	169
170	170	* LoRaWAN Class A & Class C protocol
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176	176	* Counting
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	186	+
179	179	== 1.4  Applications ==
180	180
181	181	* Smart Buildings & Home Automation
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186	186	* Smart Factory
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	198	+
189	189	== 1.5 Hardware Variants ==
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191	191	(% border="1" style="background-color:#f7faff; width:500px" %)
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200	200	)))
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203	203	= 2. Power ON Device =
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205	205	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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321	321	* [1] RO1 relay channel is close and the RO1 LED is ON.
322	322	* [0] RO2 relay channel is open and RO2 LED is OFF;
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324	324	**LT22222-L:**
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326	326	* [1] DI2 channel is high input and DI2 LED is ON;
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481	481	Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
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769		-
770	770	== 3.4 ​Configure LT via AT or Downlink ==
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772	772	User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
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2013		-
	2022	+== 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2014	2014
	2024	+If the device is not shut down, but directly powered off.
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	2026	+It will default that this is a power-off state.
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	2028	+In modes 2 to 5, DO RO status and pulse count are saved in flash.
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	2030	+After restart, the status before power failure will be read from flash.
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2015	2015	= 6. Trouble Shooting =
2016	2016	)))
2017	2017