MATLAB: Sending the function through a serial port

asciiescape keyserial port

Hi,
My name is Gunnar and I am a M.Sc. student of engineering. I am working on controlling a Fraction Collector through my serial port. It works fine, all except this one function called pulse. In the guide for the device it says this about this function: "Pulsing will continue until it is aborted with an esc character."
This works fine when I use hyperterminal (windows program) to communicate with the serial port, but how to send Esc through matlab.
I have tried sending '0x1B', 'ESC', 'AT s2', '###' and many more. All have been formatted as string.
Is there perhaps any way of having fprintf recognize that my string is ascii code ?
However I am open to any suggestions.
Thanks in advance.

Best Answer

fwrite(s,char(27))
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