This is an application built using React Native, Node.js and Socket.IO for controlling a Raspberry Pi robot using a smartphone. Watch the video video.mp4 to see it in action!
The GPIO output is handled by a Python program and the input is handled by a Node.js server.
Credits goes to https://github.com/kprimice/react-native-sensor-manager which is used to get input from the phone's gyroscope.
The standard settings are for a robot with a L293D motor driver and the GPIO pins of the Raspberry Pi connected as follows:
Enable 1 -> Pin 36
Input 1 -> Pin 38
Input 2 -> Pin 34
Enable 2 -> Pin 33
Input 3 -> Pin 35
Input 4 -> Pin 37
If you prefer to use other GPIO pins, edit the control.py file in the python directory. Also connect your Raspberry Pi camera.
Install http://www.linux-projects.org/uv4l/ so you can stream video from your Raspberry Pi camera. Then go to reactnative/components/ and tweak connection/Connection.js so it connects to your Raspberry Pi's local IP address and camera/Camera.js so it connects to your UV4L streaming server.
Install Node.js and socketIO-client-2 for Python on your Raspberry Pi, then clone the repository to your Raspberry Pi. Run the React Native app on your Android phone. Run nodejs server.js in the terminal in the nodejs folder to start the server. Finally run sudo python3 control.py in the python directory. Start the app on your Android phone and start driving!