open port component is red in GH/Firefly

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Permalink Reply by Andy Payne on March 14, 2013 at 4:25pm

Can you tell me what the error message says?  Also, can you make sure you don't have the serial port already open by another application (this might be because the Serial Monitor in the Arduino IDE is already open... or perhaps you have another GH definition open which has opened the port).  

-Andy