31 lines
843 B
Markdown
31 lines
843 B
Markdown
# Han Mqtt Adapter
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### Install
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1. Setup picoW with MicroPython [link](https://www.raspberrypi.com/documentation/microcontrollers/micropython.html)
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2. Add dependencies (umqtt)
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3. Copy main.py and config.py to picoW root
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4. Edit config.py to correct SSID, Password and MQTT broker IP
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### Protocol
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[link to HAN protocol](https://hanporten.se/svenska/protokollet/)
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### Hardware
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Han port pinout (RJ12):
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1. 5V (max 250mA)
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2. Data request (connect to 5V to enable)
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3. Data GND
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4. NC
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5. Data (TX 115200 inverted open drain)
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6. GND
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PicoW connection:
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- Connect HAN port pin 1 and 2 to pico 5V
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- Connect HAN port pin 3 and 6 to pico GND
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- Connect HAN port pin 5 to pico 1 (RX)
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- Add pullup resistor (15k) between Pico RX pin and 3V3
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