That solved the warnings, thank you!
Now I am able to retrieve the temperatures every minute.

When I want to change some settings, nothing happends. Does someone know why and how I can solve this?

I tried installing the evohome client by following the instructions on: http://www.domoticz.com/wiki/Evohome At the step "Create the initial Domoticz hardware device and zones make sure Python and the evohome-client are installed before running this", I receive an error and nothing is being created ...