Hello,
Finally i can present the android app for the WFS210.
You can find it here => https://play.google.com/store/apps/details?id=be.velleman.wfs210
If you don’t have a WFS210 don’t worry you can still try the app by enabling the DEMO mode in the settings.
If you still find bugs you can report them here on github.
The protocol between the WFS210 and a tablet is open source and can be found here
Have fun,
VEL337