Open SchneHa opened 6 years ago
The "Board ... is unknown" error occurs when a Boards Manager installation of a different version of a hardware package fails to completely uninstall the previous version. Here's how you solve it:
packages/Elektor/hardware/avr
folder.I had several files of 0kb size in my Arduino15 folder. I deleted all of them and also deleted the folder of the previously installed board package. Then I downloaded the latest package folder from GitHub and copied it to the Arduino15 folder. Restarted Arduino IDE and all is fine.
I installed both board packages (AVR boards and UNO R4) and tried to flash a sketch to AVR Playground. I got the error message that board avr-playground is unknown. I reinstalled the boards package several times. It's always the same.
How to fix that error?
Arduino IDE 1.8.5 for Mac