From Hentschel
/* Homekit setup */
** make sure Node version already installed is > 8.0 (update to TLS version)
** upgrade before installing the ''homebridge-openhab2'' node contribution and the stuff required for homebridge
* '''Important: ''' When the OpenHAB server is rebooted - or the OpenHAB server is restarted, the HomeBridge server doesn't reconnect (timing problem). Need to restart HomeBridge too''' <-- fix me
* '''Important:''' After initial start of OHAB, wait until that's settled, then start HomeBridge. It seems that Homebridge/Homekit needs some time to settle for updates from devices to work. Also, always restart the Home.app's on the iOS devices.