OP, try following the steps below:
open you arduino sketch
go to Tools > Processor > and
Choose ATMEGA328P (old bootloader) if by default it was ATMEGA328P or ATMEGA328P if by default it was ATMEGA328P (old bootloader)
OP, try following the steps below:
open you arduino sketch
go to Tools > Processor > and
Choose ATMEGA328P (old bootloader) if by default it was ATMEGA328P or ATMEGA328P if by default it was ATMEGA328P (old bootloader)