WiFi RC Transmitter is a free Android app that allows you to control a wireless car, boat, airplane, and more, built using a WiFi receiver. The app is compatible with WiFi modules such as ESP and NodeMCU, which can be used to interface with motor controllers and build various vehicles.

To connect, simply power up the WiFi module in AP mode, turn on the Android device's WiFi, and connect to the AP. Then launch the app and connect to the IP address and port of the WiFi module's server socket. You can then control the receiver using four channel controls: throttle, direction, custom switch 1, and custom switch 2.

The app also includes a help manual that provides more information on developing the WiFi receiver, sample code, and other useful resources. With its user-friendly interface and versatile capabilities, WiFi RC Transmitter is a must-have for anyone looking to control their wireless vehicles with ease.