![]() I had the same problem on two Arduinos (one Uno, and one Modern Device Freeduino/USB Host board) and the window between reset and the beginning of serial port usage was so small that it was impossible to upload. I finally fixed the problem by purchasing another Arduino Uno and building an ISP cable per, and using it to flash the Bare Bones app from the examples into each inaccessible board, using Arduino IDE version 0023, following to change preferences.txt. (Be sure to save the original file before editing it so you can replace it after you've rescued your Arduino.) It took one quick upload to fix each board. Such a fast fix after so much grief. You might not want to purchase another Arduino, but consider these benefits: • You can overwrite the bootloader on your Arduino to gain more space. • Once the bootloader is overwritten, the board will boot faster. • Supposedly you can program raw AVRs for special projects, but I have not tried this: Google for ArduinoISP • It will quickly fix Arduinos that you block in the future.
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