Yes, I have done that. I integrated the push button from sensor into Homeassistant to control LIFX lamps. The pairing was tricky and I needed the Hue HUB to pre-configure the buttons (don't know if it works without).
It would be interesting to know if anyone has managed to use it with Home Assistant and a universal zigbee bridge without necessarily using Hue HUB. Anyone?
I would be interested to know if anyone has been able to integrate the buttons into Google Home? And thus control other devices (e.g. roller shutters)?