error: stk500_getsync(); not in sync: resp=0x00

Hi there,

I have been using my arduino Duemilianove for a month with no issues. Last night, when I tried programing the board I started to get the following error:

Binary sketch size: 962 bytes (of a 30720 byte maximum)

avrdude: stk500_getsync(): not in sync: resp=0x00 avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

I have no idea what happened.

I plugged an led into pin 13 and ground and hit the reset button. The LED did not blink.

You need a resistor in series with the LED else it will consume too much current and could prevent the device from working. Try removing the LED or try a 220 ohm resistor to begin with.

Check out our new shield:

Pin 13 on the unit already has a resistor in it for the purpose of using a resistor. Pin13 is Connected to the L led On the boared. It's the uploading error that bothering me, but thank you for your help anyway!

I got the same error in the 0018 IDE but I try to use wiht Severino RS-232, and I try to put a 220K resistor but it's the same, I think that is a IDE error.

Watch my post:

Pin 13 on the unit already has a resistor in it ...

You are mistaken if you think the built in resistor will limit the current through an external LED connected to pin 13.

It's the uploading error that bothering me...

Put 'error: stk500_getsync(); not in sync: resp=0x00' into the search box at the top of the page and check out some of the >700 hits.