OK, I see that OH2 2.5.0 was released. How can I update my installation? Via openHABian configuration tool? And yes I make an Image backup before I start the update (-:
But one question was open for me: why did the Osram switch do what the should do an the Philips motion sensor is quite dead? Both of them showing in the Things View the status Online, so that I interpret this as established connection.