invalid device signature


i want to upload a sketch on my arduino diciemla using avrdude. but i got a error: invalid device signature

have someone an idea?

The standard version of avrdude uses a "universal" command to get the device signature, which is not supported by the Arduino bootloader. Arduino comes with a patched version of avrdude that uses the "device signature" command instead, which is supported. You could use that version of avrdude: binaries are included in the Arduino distribution, and the source is at: Alternatively, you can force the standard version of avrdude to proceed despite the invalid signature by using the -F option.