Hi Dirk,
Can you check all apps on extensive memory usage? Like 60MB or more?
I found out that can cause connection problems.
The power varying between 2 and 2.2 Watts seems no big issue to me, but I have to say my graph is just flat at 2 Watts.
What does the System - Average Load graph say?
Maybe here are some useful wifi hints for you, Homey seems a bit old fashioned on the wifi part.
