I have no WPS button to press on my router so can't connect my Smart Meter

Hi There

We don’t use the router’s WiFi but a mesh system instead.

How can I connect the smart meter to it?

Cheers

Sebastian

We don't use the router's WiFi but a mesh system instead.

No idea what this means, but your IHD supports only WiFi. If you have something else, it’s up to you to figure out how to bridge WiFi to your local infrastructure. Do you mean WiFi with a mesh of repeaters?

Don’t worry about WPS, it’s terribly insecure and should be disabled in any case.

Finally, the WiFi connection doesn’t do anything anyway. It may do in the future, with emphasis on the “may”.