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AVRdude Verification Error Solution

2011 October 11
by Tedb0t

If you’ve been getting an Arduino error like this:

avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x0007
         0xff != 0x7f
avrdude: verification error; content mismatch

It may be as simple a fix as moving your USB cable from a hub directly to your computer—that fixed it for me!

More information: I had also been getting errors like this from avrdude:

avrdude: 2 retries during SPI command

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