Hello,
I am trying to upload program into ATmega644P through BT module Rayson BMT-112 and Arduino IDE. I uploaded atmega644p bootloader and established a BT connection, but when I try to upload a program from Arduino IDE it cant be uploaded. No error message appears, just "Uploading to I/O Board..." and there it stays until I interrupt it (I try to wait more than 30 minutes; simply Blink program). Know somebody what can be wrong?