I assumed you had read the introduction I gave in the first link, maybe you mainly looked at the pictures 
Have you also got the connection to your MQTT broker working?
Follow the link in the
Once installed, follow the instructions on how to retrieve the Identity Bluetooth MAC Address and Identity Resolving Key for your Apple devices …
paragraph, leading you to the appropriate section on the the same page in the documentation.
If you do not have a Mac to retrieve the Identity Resolving Keys for your devices, it might be a bit more involved, but there is also a separate thread about