Re:Home Assistant is an open-source home automation platform...
by detaro on Saturday October 21, 2017 @03:24PM
(#15523174)
There is an extra repo for the web frontend: https://github.com/home-assistant/home-assistant-polymer
>"Control all your devices from a single, mobile-friendly, interface."
I had a cursory look through the github repo and everything just looked like python, nothing UI wise jumped out at me.