the OOPic R should work fine with the Roboteq controler.
We believe there are people using an OOpic with our product but don't know much about the details.
You must configure your serial port with the proper settings (7-bit, even parity, 1 stop bit, 9600bauds). Then you need to construct the commands. Commands are simple but the values are all in Hexadecimal (i.e. 2 ASCII characters to form an 8-bit value). So you must be able to do the conversion in your micro. Pls refer to the manual for details on the RS232 commands.