Hello cnd,
I just want to make sure you realize that a 3.3V serial port is a totally different thing from a USB host port, and even if you learn how to use it, you are not going to be able to do USB communication with the Maestro. You should be able to get serial communication working for basic control - and I would love to hear about it if you do! - but you are not going to be able to change the saved settings on the Maestro over that port.
-Paul