Looking for temperature controller for underfloor heating

I’m looking for a replacement of my traditional temperature controllers for the underfloor heating.
They are quite simple and I would like to replace them in order to extend the functionality while keeping the temperature control itself in the device.

As communication I’m thinking of either zwave, enocean or wifi.
They need to fit optically somehow, maybe the biggest challenge, but necessary due to WAF.

I have Jung AS 500 series and they look like this:

Any ideas how to replace?

I have 3 of these guys. If you need more info, just ask. Here’s a link to more info about them.

I personally bought mine from eBay where they were a little cheaper

I use these:

Thanks for sharing,
@Gerry_Maguire, @HaKuNa
I’ll have look at them.

I’m using a Hysen WIFI thermostat from ebay, which there is a python script for. I’ve used a few of these with great results and very cheap. My unit will be controlling a 600Watt electric element in a concrete slab

Sorry for reviving this old thread - @usambara I’m looking at the same challenge now, what did you decide to do?
I would like to replace the controller with a wifi piece.

I’ve decided to keep it as it is, so no connection to OH at all.