Using the Parallax Serial RFID Reader with the Raspberry Pi
Cory Spencer

Hi man, I found your article very interesting and I’m trying to make my Parallax Serial RFID reader working with my Rpi B+ but as I put my card near the RFID, it throws an exception and it closes itself.
When I try to remove the try-except block to get details of the error I get the following message: “ buf =, size-len(read))
OSError: [Errno 11] Resource temporarily unavailable”. Can you suggest me something to do in order to try to solve that? 
Thanks ;)

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