cm/han-mqtt-adapter

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Han Mqtt Adapter

Protocol

link to HAN protocol

Hardware

Han port pinout (RJ12):

5V (max 250mA)
Data request (connect to 5V to enable)
Data GND
NC
Data (TX 115200 inverted open drain)
GND

PicoW connection:

Connect HAN port pin 1 and 2 to pico 5V
Connect HAN port pin 3 and 6 to pico GND
Connect HAN port pin 5 to pico 1 (RX)
Add pullup resistor (15k) between Pico RX pin and 3V3