Hi Phillip,

Thanks for attaching the image.  Since I can see that the port is open, but that the Mega Read component has an error, my first guess would be whether or not you have the Mega Firmata properly uploaded to your board?  Is it possible you loaded the Uno Firmata instead? The Uno and Mega components are looking for the data to be properly formatted when it goes and reads from the port (the firmata usually handles this)... so if the data doesn't match then it will usually throw an error.  Could you check to make sure you've got the right firmata installed.

-Andy

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