Hello,
I have a following problem; I would like Arduino to tweet after RF identification. Separately, the code to tweet and the code for rfid work perfect (I send to serial port a number of card identified), but when I add the instructions from the tweet sketch in the rfid sketch it doesn't work, I acctually can't read anything from the serial port, and it doesn't tweet.
You can find the separate codes for twitter and rfid along with the integrated code in the attachment, can you please tell me if you see a mistake?
Thanks in advanced 
arduino_rfid_tweet.rar (3.08 KB)