here’s another update for you. I managed to get the second Sensor working, also. So now I can be sure, they are both ok (hardware-wise). And I have even reached the next level: The second Sensor is still showing up in my ImperiHome temperatur widget, has not disappeared yet. That’s the good news! The bad news: the temperature hasn’t updated in the last 12 hours although I have set the interval to 3600 seconds (1h). It is still exactly 22.8°C which is impossible, it is much colder now.