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LT Series LoRa IO controller User Manual 29 / 42
3.7 LEDs Indicators
Always on if there is power
After device is powered on, the SYS will fast blink in GREEN for 5
times, means RS485-LN start to join LoRaWAN network. If join
success, SYS will be on GREEN for 5 seconds. SYS will blink Blue on
every upload and blink Green once receive a downlink message.
Device boot: TX blinks 5 times.
Successful join network: TX ON for 5 seconds.
Transmit a LoRa packet: TX blinks once
RX blinks once when receive a packet.
For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
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