My intention is not to create a new kind of robot, thus it's not the build instruction that is in the foreground of this project. I will send out an assembled robot that needs nothing but WLAN access. However, all my projects are educational and open source, thus I am telling you of course how I made my bots up and running in case you want to make an own copy:

A robot (no matter if build from scratch or if using a RC model car) needs drive and steering commands. I am using a double H bridge to implement this functionality. You can also reuse the power electronics of your RC car. A DC/DC converter giving 5V output is needed for the Raspberry Pi.

The wiring diagram is part of the download package.

The software is based on Raspbian Lite. I have added packages for Apache web server with Perl support, ffmpeg for image manipulation and packages needed to turn the Raspberry Pi into an access point.

Details about the installation are in the download package.