vicki@stanfield.net wrote: > If I simply try to do this: > > port.write(hex(18)) > > It translates the 1 to hex and then the 8 to hex. I > realize this is quite simplistic, but it is really all > I need to do. If I put '18', it complains about not > being able to convert a hex value to a hex value. What is the exact error you are seeing? Do you get a Python traceback? If so, can you post a copy? Neil