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19	19	== 1.1 What is LT Series I/O Controller ==
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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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53		-
54	54	== 1.2  Specifications ==
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82		-
83		-
84	84	**Interface for Model: LT22222-L:**
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107		-
108		-
109	109	**LoRa Spec:**
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166	166	* (((
167	167	Packet engine up to 256 bytes with CRC.
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169		-
170		-
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	167	+
174	174	== 1.3 Features ==
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176	176	* LoRaWAN Class A & Class C protocol
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295	295
296		-
297	297	=== 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
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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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353		-
354	354	=== 3.3.2 AT+MOD~=2, (Double DI Counting) ===
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493	493	Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
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496	496
497		-
498	498	=== 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
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647	647	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
648	648	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.**
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	643	+
650	650	**AT Command to set Trigger Condition**:
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652	652	(% style="color:#4f81bd" %)**Trigger base on voltage**:
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727	727	* Each bits shows if the corresponding trigger has been configured.
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729	729	**Example:**
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731	731	10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
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738	738	* Each bits shows which status has been trigger on this uplink.
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	735	+
740	740	**Example:**
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742	742	10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
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749	749	* Each bits shows which status has been trigger on this uplink.
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751	751	**Example:**
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753	753	00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
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	776	+
779	779	== 3.4 ​Configure LT via AT or Downlink ==
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781	781	User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
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789	789	* (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
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	789	+
791	791	=== 3.4.1 Common Commands ===
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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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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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