I am using exactly this chip in a PCB for a project. The thing is that I wanted to program it using Arduino IDE but then I realized about all that bootloader things that must be done.
This way, I burned the bootloader successfully, but anyway, it doesn't allow me to upload code anymore. I am using the RX, TX, DTR, CTS, GND and Vcc pins as if it was a common Arduino board.
By the way, I had the genius idea to disolder one of this chips from an Arduino board that already had the code inside. And everything was good! However, it doesn't allow me to upload code again.
Could anyone give me some feedback? Maybe I'm missing something.
Thank you so much for your time, regards!!