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Author Topic: Serial Talking too much to Upload  (Read 695 times)
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Board: Uno ATMega328

I forgot to put a delay in my loop that prints a message through serial. When run the TX light is constantly on. I can hold the reset button down for 5-10 seconds for the light to turn off, but I am unable to upload new sketches.

It seems like the serial printing is blocking the uploading process. How can I fix this?

Is there a way to wipe the Arduino's current program manually?

Thanks.
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Lancashire, UK
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Sounds like your 8U2 firmware needs updating. 

http://arduino.cc/en/Hacking/DFUProgramming8U2

The method for getting it into DFU mode is awkward on that link : this is a lot easier :



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Perfect. I was able to reset the 8U2 as described on the website and upload a new program once I had finished.

Thanks.
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