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Platform Notes

Raspberry Pi (all models)

Serial console must be disabled

The Build HAT uses the Pi's serial port. By default, the Pi uses this for a login console which must be disabled:

  1. Run sudo raspi-config
  2. Interface Options > Serial Port
  3. "Would you like a login shell to be accessible over serial?" — No
  4. "Would you like the serial port hardware to be enabled?" — Yes
  5. Reboot

Linux dependencies

Building from source on Raspbian requires:

sudo apt install libdbus-1-dev libudev-dev pkg-config

Raspberry Pi 5

The Pi 5 uses a different UART controller and requires additional configuration for the Build HAT.

Add the following to /boot/firmware/config.txt:

enable_uart=1
dtoverlay=buildhat

Then reboot. On Pi 3 and Pi 4 these are not needed — the default UART configuration works with the Build HAT.