text: var config = require('./settings');
  var spawn = require('child_process').spawn;
  
  var request = require('request');
  var iothub = require('azure-iothub');
  var fs = require('fs');
  var http = require('http');
  
  const path = require('path');
  var clientFromConnectionStringAMQP = require('azure-iot-device-amqp').clientFromConnectionString;
  var ip = require("ip");
  var serial = require('node-serial-key');
  var mkdirp = require('mkdirp');
  var cameraPID = new Map();
  