Send arbitrary commands to a Particle Photon (new version of Spark Core) via express

http-coap-spark-particle-forwarding-app.js

var express = require('express');
var app = express(),
var spark = require('spark');
var _ = require('lodash');

require('dotenv').load(); // reads particle username and password from a file named .env that you can .gitignore

var deviceName = "InternetButton"; // set this to the name of your device

// Login and retrive the device
var getDevice = spark.login({
  username: process.env.PARTICLE_USERNAME,
  password: process.env.PARTICLE_PASSWORD
}).then(function() {
  return spark.listDevices();
}).then(function(devices) {
    var device = _.findWhere(devices, {name: deviceName});
    if (device) {
      return device;
    } else {
      throw new Error('Device ' + deviceName + ' not found. Avaliable devices: ' + _.pluck(devices, 'name').join(', '));
    }
});

// app.all supports GET, POST, etc.
app.all('/device/:command/:value?', function(req, res) {
  getDevice.then(function(device) {
    device.callFunction(req.params.command, req.params.value, function(err, data) {
      if (err) {
        console.error(err);
        return res.status(500).send(err.message || err);
      }
      res.json(data);
    })
  }).catch(function(err) {
    console.error('Error getting device: ', err);
    res.status(500).send(err.message || err);
  });
});

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