First version

index.js

@@ -0,0 +1,75 @@
+var express = require("express");
+var SerialPort = require("serialport").SerialPort;
+var serialPort = new SerialPort("/dev/ttyACM0", {
+	  baudrate: 9600
+});
+serialPort.on("open", function () {
+	/*serialPort.on('data', function(data) {
+		process.stderr.write(data);
+	});*/
+	setTimeout(function () {
+	serialPort.write("2,3\n", function (err, results) {
+		setTimeout(function () {
+			serialPort.write("1,255\n", function (err, results) {
+			});
+		}, 500);
+	});
+	}, 2000);
+});
+
+var toHue = function (s) {
+	return Math.floor(s / 64 * 256 % 256);
+};
+
+var state = 42;
+var h;
+var i = toHue(state);
+
+var sp = 1;
+
+var app = express();
+
+app.get("/get", function (req, res) {
+	res.end(state + "");	
+});
+
+app.get("/set/:i", function (req, res) {
+
+	state = req.params.i;
+	//console.log("3," + Math.floor(state / 64 * 256 % 256));
+	res.status(200).end();
+
+	if (h) {
+		clearInterval(h);
+	}
+	h = setInterval(function () {
+		if (i - toHue(state) > toHue(state) - i + 255) {
+			i += sp;
+		}
+		else if (toHue(state) - i > i - toHue(state) + 255) {
+			i -= sp;
+		}
+		else if (toHue(state) < i) {
+			i -= sp;
+		}
+		else if (toHue(state) > i) {
+			i += sp;
+		}
+		if (i > 255) {
+			i = 0;
+		}
+		else if (i < 0) {
+			i = 255;
+		}
+		if (Math.floor(toHue(state) / sp * 2) == Math.floor(i / sp * 2)) {
+			i = toHue(state);
+			console.log(i);
+			clearInterval(h);
+		}
+		serialPort.write("3," + Math.floor(i) + "\n", function (err, results) {
+		});
+	}, 50)
+
+});
+
+app.listen(8026);

simple/simple.ino

@@ -0,0 +1,112 @@
+#include <Adafruit_NeoPixel.h>
+
+#define PIN            6
+#define NUMPIXELS      37
+
+Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
+
+int delayval = 16;
+
+bool off = false;
+int brightness = 255;
+int hue = 168;
+int mode = 1;
+
+int counter = 0;
+
+uint32_t Wheel(byte WheelPos) {
+  WheelPos = 255 - WheelPos;
+  if(WheelPos < 85) {
+    return pixels.Color((255 - WheelPos * 3) * brightness / 255, 0, WheelPos * 3 * brightness / 255);
+  }
+  if(WheelPos < 170) {
+    WheelPos -= 85;
+    return pixels.Color(0, WheelPos * 3 * brightness / 255, (255 - WheelPos * 3) * brightness / 255);
+  }
+  WheelPos -= 170;
+  return pixels.Color(WheelPos * 3 * brightness / 255, (255 - WheelPos * 3) * brightness / 255, 0);
+}
+
+void setup() {
+  Serial.begin(9600);
+  pixels.begin();
+}
+
+void loop() {
+
+  if (off) {
+
+    for (int i = 0; i < NUMPIXELS; i++){
+      pixels.setPixelColor(i, pixels.Color(0,0,0));
+    }
+    pixels.show();
+    
+  }
+  else {
+
+    if (mode == 1) {
+      for (int i = 0; i < NUMPIXELS; i++){
+        pixels.setPixelColor(i, pixels.Color(0,0,brightness));
+      }
+      pixels.show();
+    }
+    else if (mode == 2) {
+      for (int i = 0; i < NUMPIXELS; i++){
+        pixels.setPixelColor(i, Wheel((i * 2 + counter / 2) % 256));
+      }
+      pixels.show();
+    }
+    else if (mode == 3) {
+      for (int i = 0; i < NUMPIXELS; i++){
+        pixels.setPixelColor(i, Wheel(hue % 256));
+      }
+      pixels.show();
+    }
+    
+    counter++;
+  
+  }
+    
+  delay(delayval);
+
+  while (Serial.available() > 0) {
+
+    int command = Serial.parseInt();
+    int value = Serial.parseInt();
+
+    if (Serial.read() == '\n') {
+      Serial.print("Command: ");
+      Serial.println(command);
+      Serial.print("Value: ");
+      Serial.println(value);
+      switch (command) {
+  
+        case 0:
+          off = (value == 0);
+          break;
+  
+        case 1:
+          brightness = constrain(value, 0, 255);
+          Serial.print("Brightness: ");
+          Serial.println(brightness);
+          break;
+          
+        case 2:
+          mode = constrain(value, 1, 3);
+          Serial.print("Mode: ");
+          Serial.println(brightness);
+          break;
+          
+        case 3:
+          hue = constrain(value, 0, 255);
+          Serial.print("Hue: ");
+          Serial.println(hue);
+          break;
+    
+      }
+    }
+    
+  }
+  
+}
+