SparkFun Forums

[3DP]

I recently acquired four Redboard Arduinos and 4 MP3 player shields for a project. I can go through the sparkfun hookup guide with the genuine Arduino UNO board and run the "File Player" demo from the MP3 shield library just fine. When I switch over to the sparkfun Redboard and try to load the same source code I get the following error.

"avrdude: verification error, first mismatch at byte 0x7800
0xf9 != 0xff
avrdude: verification error; content mismatch"

Normally I think this would be a bootloader problem but I can upload other programs just fine... I have now opened/tried two more Red Boards right out of the package to no avail. Is it possible that the library is causing this somehow? I have a pretty big investment in the 4 Redboards about would like to use them as advertised as Uno equivalents.

Link Sparkfun Hookup Guide
https://learn.sparkfun.com/tutorials/mp ... eld-hookup

[Ross Robotics]

Check the COM port, and board selection. All 4 Redboards and the Arduino are going to have different COM ports.

[3DP]

Thanks! I wish it were that easy. Like I said I have no problem flashing the red board with basic "blink" examples.

[Ross Robotics]

Try this: http://forum.arduino.cc/index.php?topic=135195.0

If that doesn't help search Google for the error.