If it did not flash, there is no bootloader on the 328P processor. Can you post a link to what you exactly bought. Or post a clear photo of the top so we can try to identify the microcontroller.
The usual solution is to (try to) burn the bootloader.
If it did not flash, there is no bootloader on the 328P processor. Can you post a link to what you exactly bought. Or post a clear photo of the top so we can try to identify the microcontroller.
The usual solution is to (try to) burn the bootloader.