cd controller
npm install
npx expo start
in another terminal window
cd server
npm install
node server.js // this will start the server at localhost:8080
on your android device download the expo go app and scan the QR code displayed on the terminal.
The websocket client must be connected to the computer's IPv4 address: for windows check through ipconfig Enter the IPv4 address in the dialog box displayed on the homescreen of the app.