Add files via upload

webserver.js

@@ -0,0 +1,56 @@
+var http = require('http').createServer(handler); //require http server, and create server with function handler()
+var fs = require('fs'); //require filesystem module
+var io = require('socket.io')(http) //require socket.io module and pass the http object (server)
+
+var Gpio = require('onoff').Gpio; //include onoff to interact with the GPIO
+var LED = new Gpio(4, 'out'); //use GPIO pin 4 as output
+var pushButton = new Gpio(17, 'in', 'both'); //use GPIO pin 17 as input, and 'both' button presses, and releases should be handled
+
+http.listen(8080); //listen to port 8080
+
+function handler (req, res) { //create server
+  fs.readFile(__dirname + '/Public/index.html', function(err, data) { //read file index.html in public folder
+    if (err) {
+      res.writeHead(404, {'Content-Type': 'text/html'}); //display 404 on error
+      return res.end("404 Not Found");
+    } 
+    res.writeHead(200, {'Content-Type': 'text/html'}); //write HTML
+    res.write(data); //write data from index.html
+    return res.end();
+  });
+}
+
+
+
+io.sockets.on('connection', function (socket) {   // WebSocket Connection
+  var lightvalue = 0;
+
+  socket.emit('led1', "TEST");
+                                                  // static variable for current status
+  pushButton.watch(function (err, value) {        // Watch for hardware interrupts on pushButton
+    if (err) { //if an error
+      console.error('There was an error', err);   // output error message to console
+      return;
+    }
+    lightvalue = value;
+    socket.emit('light', lightvalue);             // send button status to client
+  });
+
+  socket.on('light', function(data) {             // get light switch status from client
+    lightvalue = data;
+    if (lightvalue != LED.readSync()) {           // only change LED if status has changed
+      LED.writeSync(lightvalue);                  // turn LED on or off
+      console.log("lightvalue : " + lightvalue); 
+      socket.emit('light', lightvalue);
+      socket.emit('led1', "TEST"+lightvalue);
+    }
+
+  });
+});
+
+process.on('SIGINT', function () { //on ctrl+c
+  LED.writeSync(0); // Turn LED off
+  LED.unexport(); // Unexport LED GPIO to free resources
+  pushButton.unexport(); // Unexport Button GPIO to free resources
+  process.exit(); //exit completely
+});