Han Mqtt Adapter

Install

1. Setup picoW with MicroPython link
2. Add dependencies (umqtt)
3. Copy main.py and config.py to picoW root
4. Edit config.py to correct SSID, Password and MQTT broker IP

Protocol

link to HAN protocol

Hardware

Han port pinout (RJ12):

1. 5V (max 250mA)
2. Data request (connect to 5V to enable)
3. Data GND
4. NC
5. Data (TX 115200 inverted open drain)
6. 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