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Topic: Ethernet Shield (Read 2 times) previous topic - next topic


I upload the program to the Mega 2560 and then connect the Ethernet Shield with the ethernet cable but nothing happen when I open the serial monitor appears this "processing.app.SerialException: Serial port 'COM1' already in use.  Try quiting any programs that may be using it."  :smiley-red:


Try the ASCII Table sketch under Examples -> Communications.  Load the sketch with nothing attached to the Mega2560.  Open the serial monitor and see what happens.  It is very unlikely, though not impossible, that the Mega2560 is actually on COM1.

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