led pwm

webserver.js

@@ -2,59 +2,26 @@ var express = require('express');
 var app = express();
 var server = require('http').createServer(app);
 var io = require('socket.io')(server);
-var isPi = require('detect-rpi');
+var Gpio = require('pigpio').Gpio;
 
 /*
  GPIO
  */
-var Gpio;
-var blinkInterval;
-var RED;
-
-var RED;
-var GREEN;
-var BLUE;
-
-if(isPi()){
-    // Init GPIO
-    Gpio = require('onoff').Gpio;
-    // Set port
-    RED = new Gpio(4, 'out');
-    GREEN = new Gpio(17, 'out');
-    BLUE = new Gpio(27, 'out');
-
-    blinkInterval = setInterval(blinkRED, 250);
-
-    function blinkRED() {
-
-        if(RED.readSync() === 1){
-            RED.writeSync(0);
-            GREEN.writeSync(1);
-        }else if(GREEN.readSync() === 1){
-            GREEN.writeSync(0);
-            BLUE.writeSync(1);
-        }else if(BLUE.readSync() === 1){
-            BLUE.writeSync(0);
-            RED.writeSync(1);
-        }else{
-            RED.writeSync(0);
-            GREEN.writeSync(0);
-            BLUE.writeSync(0);
-
-            RED.writeSync(1);
-        }
-    }
 
-    function endBlink() {
-        clearInterval(blinkInterval);
-        RED.writeSync(0);
-        RED.unexport();
-    }
+var RED = new Gpio(4, {mode: Gpio.OUTPUT});
+var GREEN = new Gpio(17, 'out');
+var BLUE = new Gpio(27, 'out');
 
-    setTimeout(endBlink, 15000);
-}
+var dutyCycle = 0;
 
+setInterval(function () {
+  RED.pwmWrite(dutyCycle);
 
+  dutyCycle += 5;
+  if (dutyCycle > 255) {
+    dutyCycle = 0;
+  }
+}, 20);
 
 /*
   WEB SERVER