Sonoff has a neat display that can be flashed with Tasmota firmware and integrated with Openhab using MQTT (Sonoff Product Site)
Check out this post: NSPanel
A detailed documentation of what you need to do is available here: https://github.com/alfpf/NSPanel-setup
Note: Its very much of a DIY project so be prepared to spend some time, but I have two of those panels in my house configured showing temperatures and weather forcast on the main panel, and sub panels to control light switches. You can control e.g. the dimming level using OpenHAB rules and I also use rules to trigger the warning icons on the panel.
It communicates with WiF, only wädownside is that requires power. I solved this by removing the bulky adapter on the back of the panel and instead used a thin wire to a small AC-DC comverter I hid behind the nearest outlet.
