/dev/mediainput0 needs an extra application which we will start to ship soon.
please replug your device 1-2 times till getinput.sh returns the correct path to the input device.
you can also manually load uinput by running:
sudo modprobe uinput
and afterwards replug the device, the driver is supposed to load it automatically although the initialization of uinput might take a little bit too long and the driver might skip to use it because of that.