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How would you format the sending of a serial command from Android over bluetooth?

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http://stackoverflow.com – I have an iRobot with a RooTooth installed, which is a bluetooth to serial converter. It is said to operate just like a serial port and data should be received as such. I have been able to use a terminal program to send serial commands directly to it over a serial cable, and it works fine. I can also use the app I have written to send commands from my phone to my computer which is monitoring incoming bluetooth commands, and it receives them exactly as intended. However, when I send it from my phone to the rootooth, nothing happens. Is there something wrong about how I am sending the commands (HowTos)