When I connect a LED on RX pin it's ok I can upload my soft in my Duemillanove whithout problem. But when I connect a buzzer on RX pin I can't upload my soft, I have this error:
avrdude: stk500_getsync(): not in sync: resp=0xf0 avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
I don't use "serial.begin()" in my soft. I don't understand why it's ok with a LED and I can't upload with a buzzer !? :~
Help me please !!