I made model house in H0 gauge and I control it by my own DCC command station. It can turn on or off lights and change brightness of lights. You can see it on video.
More information about DCC command station controlled by Android application is here: https://www.zavavov.cz/en/model-railway/electronics/108-dcc-command-station-tcs
[embedyt] http://www.youtube.com/watch?v=BAM38b6DcUw[/embedyt]