Completely stuck - dont know where to start with evohome

I have set up a pretty standard install on a raspberry 3.

Im not a stranger to doing all manner of stuff on a raspberry pi, but im completely stuck when trying to connect my honeywell evohome central heating.

I think I need to add a repository on the home assistant page, but when i do, i cant find an evohome client.

What do i need to do to an evohome client installed and working please?

It appears to be built in

Thats what I thought, will investigate further!

Thanks for the reply