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LT Series LoRa IO controller User Manual 3 / 42
1. Introduction .............................................................................................................................. 5
1.1 What is LT Series I/O Controller .................................................................................................. 5
1.2 Specifications .............................................................................................................................. 6
1.3 Features ...................................................................................................................................... 7
1.4 Applications ................................................................................................................................ 7
1.5 Hardware Variants ..................................................................................................................... 8
1.6 Firmware Change log ................................................................................................................. 8
2. Power ON Device .................................................................................................................... 10
3. Operation Mode ..................................................................................................................... 11
3.1 How it works? ........................................................................................................................... 11
3.2 Example to join LoRaWAN network .......................................................................................... 11
3.3 Uplink Payload .......................................................................................................................... 13
There are five working modes on LT for different type application: ............................................. 13
3.3.1 AT+MOD=1, 2ACI+2AVI ................................................................................................ 13
3.3.2 AT+MOD=2, (Double DI Counting) .................................................................................. 14
3.3.3 AT+MOD=3, Single DI Counting + 2 x ACI ........................................................................ 15
3.3.4 AT+MOD=4, Single DI Counting + 1 x Voltage Counting .................................................. 16
3.3.5 AT+MOD=5, Single DI Counting + 2 x AVI + 1 x ACI ......................................................... 16
3.3.6 Payload Decoder ............................................................................................................. 17
3.4 Downlink Payload ..................................................................................................................... 18
3.5 Integrate with Mydevice........................................................................................................... 22
3.6 Interface Detail ......................................................................................................................... 25
3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ....................................... 25
3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) .................................................................. 26
3.6.3 Digital Output Port: DO1/DO2 /DO3 .............................................................................. 27
3.6.4 Analog Input Interface .................................................................................................... 27
3.6.5 Relay Output ................................................................................................................... 27
3.7 LEDs Indicators ......................................................................................................................... 29
4. Use AT Command .................................................................................................................... 30
4.1 Access AT Command ................................................................................................................. 30
4.2 Common AT Command Sequence ............................................................................................. 32
4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ...................................................... 32
4.2.2 Single-channel ABP mode (Use with LG01/LG02) ........................................................... 32
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