Controling DC Motor with buttons on a web page

Daily · Daily · commit 14b0ed40477d · 2018-08-06T13:32:45.000+02:00
diff --git a/example09.html b/example09.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<meta charset = utf8>
+<html>
+<head>
+    <title>Example with graph</title>
+</head>
+
+<body>
+
+PWM: <input id="pwm" value=100 />
+<button id="buttonSendPWM" onClick="sendPWM()">Set PWM</button>
+<button id="buttonLeft" onClick="left()">Left</button>
+<button id="buttonRight" onClick="right()">Right</button>
+<button id="buttonStop" onClick="stop()">Stop</button>
+
+<script type="text/javascript" src="/socket.io/socket.io.js"></script>
+
+<script type="text/javascript">
+var socket = io.connect("192.168.1.134:8080");
+function sendPWM () {
+    valuePWM = document.getElementById("pwm").value;
+    socket.emit("sendPWM", valuePWM);
+}
+function left () {
+    socket.emit("left", 1);
+}
+function right() {
+    socket.emit("right", 0);
+}
+function stop() {
+    socket.emit("stop", 0);
+}
+</script>
+
+
+</body>
+
+</html>
diff --git a/example09.js b/example09.js
@@ -0,0 +1,60 @@
+var http = require("http").createServer(handler);
+var firmata = require("firmata");
+var fs = require("fs");
+var io = require("socket.io").listen(http);
+
+console.log("Connecting to Arduino");
+
+var board = new firmata.Board("/dev/ttyACM0", function(){
+    console.log("Activation of pin 2");
+    board.pinMode(2, board.MODES.OUTPUT);
+    console.log("Activation of pin 3");
+    board.pinMode(3, board.MODES.PWM);
+});
+
+function handler(req, res) {
+    fs.readFile(__dirname + "/example09.html",
+    function(err, data) {
+        if (err) {
+            res.writeHead(500, {"Content-Type": "text/plain"});
+            return res.end("You didn't connect html file!");
+        }
+        res.writeHead(200);
+        res.end(data);
+    });
+}
+
+http.listen(8080);
+
+var desiredValue = 0;
+
+console.log("Running the system");
+
+board.on("ready", function(){
+    console.log("Board is ready!");
+    board.analogRead(0, function(value){
+        desiredValue = value;
+    });
+
+    io.sockets.on("connection", function(socket){
+
+        socket.on("sendPWM", function(pwm){
+            board.analogWrite(3,pwm);
+            console.log("PWM value:" + pwm);
+        });
+
+        socket.on("left", function(value) {
+            board.digitalWrite(2,value);
+        });
+
+        socket.on("right", function(value) {
+            board.digitalWrite(2,value);
+        });
+
+        socket.on("stop", function(value) {
+            board.analogWrite(3,value);
+        });
+
+    });
+
+});
