Will ESP32-WROOM-32U be damaged if operated without an antenna?
It can be damaged, and for this reason it is not recommended to any enable RF transmission without a suitable antenna connected.
can not select the correct board ESP32C3
- upgrade ESP32 SDK in arduino into the latest version
board selection ESP32C2 DEV Board
If you have rebooting problems, you can try to use ESP flash tool to erase the whole module incase of any conflicts, normally in Arduino it is not that necessary.
checksum issue for arduino previous version
- https://github.com/espressif/arduino-esp32/issues/7011
- solution: upgrade to latest arduino ESP32 boards
- problem occured on version before 2.0.5
- we tested with vesion 2.0.6, works OK