Hello, I have made a custom board for a rocket altimeter and decided to just take the 328p off of an old nano to not have to buy a new one. With the goal being to make the board as small as possible, I decided to use an external USB to serial adapter (CP2102). I assembled it all yesterday but when I try to program it I get
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xcf
I tried to burn the pro mini bootloader but it is still not working, any tips? Thanks