I get an error 1 when uploading a (small) C program to an Arduino Uno R3 board. I am really new at PlatformIO and embedded programming in general. I checked the following settings, but I don’t know where else to look: The user has been added to the dialout group. The 99-platform-udev.rules have b…

[image] toni.mini: board = ATmega328P Use board = uno See Arduino Uno — PlatformIO latest documentation