hardillb / mqtt2ble

A way to bridge MQTT topics to BLE Gatt characteristics

MQTT2BLE

A way to bridge MQTT topics to BLE Gatt characteristics

run: node index.js -c config.js

Where config.js looks like this:

module.exports = {
  broker: "mqtt://localhost",
  topic: "some/topic"
} 

The primary serivce UUID is

ba42561bb1d2440a8d040cefb43faece

and the topic charactristic is

6bcb06e2747542a9a62a54a1f3ce11e6

Background

There is a blog post that describes how I built this code here: http://www.hardill.me.uk/wordpress/2015/07/28/building-bluetooth-le-devices/

And another post about building a simple Android App to work with it here: http://www.hardill.me.uk/wordpress/2015/08/11/mqtt2ble-android-test-app/

Known issues

You have to be careful that the payload fits in the MTU

Running without root/sudo

Run the following command in the directory you ran npm install from:

find -path '*bleno*Release/hci-ble' -exec sudo setcap cap_net_raw+eip '{}' \;

This grants bleno's hci-ble binary cap_net_raw privileges, so it can start/stop BLE advertising.

Note: The above command requires setcap to be installed, it can be installed using the following:

• apt: sudo apt-get install libcap2-bin
• yum: su -c \'yum install libcap2-bin\'