Here's a great guide that worked for me - https://github.com/devbobo/homebridge-flic/wiki/Adding-a-new-Flic-button-to-Homebridge
Basically:
- Install homebridge on a system (Mac, PC, Pi)
- Install flicd https://github.com/50ButtonsEach/fliclib-linux-hci/issues/39
- Install homebridge-flic
- Ensure youre flics are unpaired (Unpair, Hold for 10 seconds if needed) and ensure you have the right bluetooth drivers that are compatible; for raspberry pi you will need to run
- Install Hesperus (Free), this will help you add the flic button to homekit
