MMDVM setup on a Pi

This is intended mostly as an aide-memoir to myself – your mileage may vary!

• Image the Pi's SD card with Raspbian.
• Mount the boot partition and edit cmdline.txt
  • Remove console=serial0,115200
  • Save
• Edit config.txt and add the following to the end of the file:

  enable_uart=1
  dtoverlay=pi3-disable-bt

  • This disables the Bluetooth module and enables the UART for MMDVM use.
• Unmount the partitions and fit the SD card to the Pi – do not fit the MMDVM POG board yet!
• Boot the Pi
• When the Pi boots, log in (username pi, password raspberry)
• Enter the following commands:

  • sudo systemctl disable serial-getty@ttyAMA0.service
    sudo systemctl disable hciuart

  • This disables the serial console and Bluetooth
• Shut down the Pi and install the MMDVM POG board. Note: remove the 3.3V regulator if you're using the POG board as a HAT!
• Boot the Pi and install the MMDVM software.