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19	19	== 1.1 What is LT Series I/O Controller ==
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21	21	(((
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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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163	163	)))
164	164	* (((
165	165	Packet engine up to 256 bytes with CRC.
166		-)))
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	171	+
	172	+)))
	173	+
170	170	== 1.3 Features ==
171	171
172	172	* LoRaWAN Class A & Class C protocol
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	186	+
182	182	== 1.4  Applications ==
183	183
184	184	* Smart Buildings & Home Automation
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	198	+
193	193	== 1.5 Hardware Variants ==
194	194
195	195	(% border="1" style="background-color:#f7faff; width:500px" %)
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285	285	* **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
286	286	* **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
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	294	+
	295	+
	296	+
288	288	=== 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
289	289
290	290	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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323	323	* [1] RO1 relay channel is close and the RO1 LED is ON.
324	324	* [0] RO2 relay channel is open and RO2 LED is OFF;
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	335	+
326	326	**LT22222-L:**
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328	328	* [1] DI2 channel is high input and DI2 LED is ON;
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338	338	** DO1 is high in case there is load between DO1 and V+.
339	339	** DO1 LED is off in both case
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	353	+
341	341	=== 3.3.2 AT+MOD~=2, (Double DI Counting) ===
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2006	2006	)))
2007	2007
2008	2008	(((
2009		-
	2022	+== 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
2010	2010
	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	+
2011	2011	= 6. Trouble Shooting =
2012	2012	)))
2013	2013