Hello! I’ve been using PlatformIO for half a year now, and in my last project I wanted to go a little bit further and to not need a bootloader. So I want to program an ATmega328P on a breadboard with a simple blink sketch, but I’m failing to do so. This is my setup: 1.-Arduino Mega 2560 has been p…

Damn you’re right, I’ve had this happen before, I sometimes forget that it doesn’t auto-detect the project by the file opened and in focus! Thank you!

PlatformIO Community

Failing to use 'Arduino as ISP' to program breadboard ATmega328P

maxgerhardt April 7, 2021, 10:12pm 2

You’re still uploading your old project for the Mega, not the project for your ATmega328P. Select the active project correctly, per documentation and this.