How to create a cloud gateway convert Sigfox to MQTT

This tutorial shows how to create a simple node gateway on IBM BlueMix in order to receive sigfox-backend HTTP callback, JSONified and send it to MQTT broker.

Step 1: Create a Node Js Application on IBM Bluemix:

Step 2: Write a simple web service to get parameter in HTTP callback from sigfox-backend server. This information will be encapsulate in MQTT payload and publish to MQTT broker. We can use publish broker provided by Mosquito company at address: ‘mqtt://test.mosquitto.org:8080’.

Step 3: On sigfox-backend site, we define a call back following the form:

http://[YourAdd]:[yourport]/sigfox?device={device}&time={time}&signal={signal}&avgSignal={avgSignal}&station={station}&lat={lat}&lng={lng}&rssi={rssi}&data={data}

Step 4: Create a HTML page subscribe to broker in order to display sigfox’s converted message. We use the Paho JavaScript Client which is a browser-based library to connect to an MQTT server.