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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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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.
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165	165	)))
166	166	* (((
167	167	Packet engine up to 256 bytes with CRC.
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171		-
172		-)))
173		-
174	174	== 1.3 Features ==
175	175
176	176	* LoRaWAN Class A & Class C protocol
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184	184
185	185
186		-
187	187	== 1.4  Applications ==
188	188
189	189	* Smart Buildings & Home Automation
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197	197
198		-
199	199	== 1.5 Hardware Variants ==
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201	201	(% border="1" style="background-color:#f7faff; width:500px" %)
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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
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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) ===
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2022		-== 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
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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 =
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