Pumpkin Patch Code

index.js

/**
 * Handy commands for setting everything up:
 *
 * Get Particle access token:
 *   $ curl https://api.particle.io/oauth/token -u particle:particle -d grant_type=password -d username={Your Particle email address} -d password={Your Particle password}
 *
 * Get list of devices from Particle:
 *   $ curl "https://api.particle.io/v1/devices?access_token={Your Particle access token}"
 *
 * Set pumpkin device to red:
 *   $ curl "https://api.particle.io/v1/devices/{Your device Particle ID}/colour" -d arg="255000000" -d access_token={Your Particle access token}
 *
 * Set pumpkin 0 to red:
 *   $ curl "http://pumpkin-patch-instance.herokuapp.com/?pumpkin=0&colour=ff0000"
 *
 * To set up on Heroku:
 *   $ heroku create pumpkin-patch-instance
 *   $ git push heroku master
 *   $ heroku config:set PARTICLE_ACCESS_TOKEN={Your Particle access token}
 */
var app = require('express')();
var request = require('request');

app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

var pumpkins = [
  // ... The Particle Device IDs for your pumpkins.
];

app.get('/', function(req, res, next) {
  var r = parseInt(req.query.colour.substring(0,2), 16);
  var g = parseInt(req.query.colour.substring(2,4), 16);
  var b = parseInt(req.query.colour.substring(4,6), 16);

  var decColour = new Array(3 + 1 - r.toString().length).join('0') + r
                + new Array(3 + 1 - g.toString().length).join('0') + g
                + new Array(3 + 1 - b.toString().length).join('0') + b;

  request.post('https://api.particle.io/v1/devices/' + pumpkins[parseInt(req.query.pumpkin)] + '/colour', {
    form: {
      access_token: process.env.PARTICLE_ACCESS_TOKEN,
      arg: decColour,
    }
  },
  function(err, data) {
    res.status(data.statusCode).send(data.body);
  });

});

app.listen(process.env.PORT || 3000);

package.json

{
  "name": "pumpkin-patch",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node index.js"
  },
  "author": "",
  "license": "MIT",
  "dependencies": {
    "express": "^4.14.0",
    "request": "^2.76.0"
  }
}

pumpkin.ino

int RED = D0;
int GREEN = D1;
int BLUE = D2;

int countdown = 0;

void setColour(String colour) {
  analogWrite(RED, 255 - colour.substring(0, 3).toInt() );
  analogWrite(GREEN, 255 - colour.substring(3, 6).toInt() );
  analogWrite(BLUE, 255 - colour.substring(6, 9).toInt() );
}

int cloudColour(String colour) {
  countdown = 30;
  setColour(colour);
  Particle.publish("colour", colour);
  return 1;
}

void setup() {
  pinMode(RED, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(BLUE, OUTPUT);
  Particle.function("colour", cloudColour);
}

void loop() {
    if (countdown > 1) {
      countdown -= 1;
      delay(1000);
    }
    else {
      setColour("255000000");
      delay(750);
      setColour("000255000");
      delay(750);
      setColour("000000255");
      delay(750);
    }
}