Firezac With Blender 2.8, you don't need the test cube file.
Start Blender, from the menu choose Window, Chordata, Init Chordata Mocap session.
Remove the Cube object that is automatically included in the Scene.
From the menu, select Window, Chordata, Add a KCeptor model to the scene.
Click the Connect button. In the Test Cube node, for the Sub-target, select the name of the KCeptor (i.e. l-arm, kc-CH_2-2).
The model should now move with the sensor.