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avrdude

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Here’s a couple of quick tips to get around the Arduino IDE error message “Serial Port in Use.”  These mostly apply to OSX, but since it is UNIX based, they may make sense for Linux as well. List Open Files Applies to:  OSX, Linux. The check to see if another process (like a previous run of avrdude) is holding the serial port open is easy on both Linux and OSX.  Just open a terminal and…