PaulP wrote:I know the Manoi and KHR have the same RCB but is the firmware code the same?
Yep. The Red is power, so it is a SLOWER connection, using the alternate serial port on the RCB3. One port HAS power and ONE half-duplex serial pin, and the other has two serial pins for simultaneous tx/rx, and ground, but no power. The radio needs the power. And the one I refer to is the WIRELESS.PaulP wrote:When you say USB/RS232 module do you mean the connection lead provided with the 'bot. Small black dongle that has a long 3 wire(black/red/yellow) cable plugged in?