board_manager:
  additional_urls:
  - https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
  - https://raw.githubusercontent.com/RAKwireless/RAKwireless-Arduino-BSP-Index/main/package_rakwireless_index.json
  - http://unsigned.io/arduino/package_unsignedio_UnsignedBoards_index.json