I am currently in the process of making a robot. I am using a rc car as the chassis and already have the navigation up and running but I want someway to take control of the robot if something goes wrong. I want to use an extra 18x I have to detect when the rc transmitter is turned on (easy just have an int check for servo pulses) and then instead of taking the signals from the autopilot take them from the rc receiver but when the transmitter is turned off reroute the signal from the autopilot to the motor. Thank you for any help you can provide.