Forward data from TTN to any Web app

The TTN backend provides a MQTT broker. All examples here can be run from your desktop. Once it works, you could host the same glue code in the cloud, e.g. at Google App Engine.

Install Nodejs

Download and install Nodejs from https://nodejs.org/en/ then type

$ node -v

(The basic idea of the code below works in any other language, of course.)

Install ttn

$ npm install ttn --save

MQTT Logger

With a MQTT client you can subscribe to packets.

This client just logs incoming packets to your console.

https://github.com/TheThingsNetwork/node-app-sdk/blob/master/src/example.js or https://bitbucket.org/tamberg/iotworkshop/src/tip/NodeJS/ttn-mqtt-logger.js

var ttn = require('ttn');

var appId = 'TTN_APP_ID';
var accessKey = 'TTN_ACCESS_KEY';

var client = new ttn.Client('eu', appId, accessKey);

client.on('message', function(deviceId, message) {
  console.log(message.payload_raw);
});

For app ID and keys, see https://console.thethingsnetwork.org/applications