board_manager:
  additional_urls:
  - https://liberatedsystems.co.uk/rnode-firmware-ce/esp-custom-package.json
  - https://raw.githubusercontent.com/RAKwireless/RAKwireless-Arduino-BSP-Index/main/package_rakwireless_index.json
  - http://unsigned.io/arduino/package_unsignedio_UnsignedBoards_index.json