Crude script to extract ttn data

banana2csv.js

//Crude script to extract ttn data.
// Run like this:
// docker run -it --rm --name banana2csv -v "$PWD":/usr/src/app -w /usr/src/app node:4-wheezy npm install ttn
// docker run -it --rm --name banana2csv -v "$PWD":/usr/src/app -w /usr/src/app node:4-wheezy node banana2csv.js

var ttn = require('ttn');
var appEUI =  '';
var accessKey =  '';
var client = new ttn.Client('staging.thethingsnetwork.org', appEUI, accessKey);
var fs = require('fs');

client.on('uplink', function (msg) {
  console.log('Received message', msg);
  console.log(msg['metadata']['server_time'], msg['fields']['temperature']);
  console.log(msg['metadata']['server_time'], msg['fields']['light']);
  var d = Date.parse(msg['metadata']['server_time']);
  fs.appendFile('public/out.csv', d.toString() + ',' + msg['fields']['temperature'] + '\n' , function (err) {
  });
  fs.appendFile('public/light.csv', d.toString() + ',' + msg['fields']['light'] + '\n' , function (err) {
  });
});

client.on('activation', function (msg) {
  console.log('Device activated:', msg.devEUI);
});