@mymirror Funny story. Last Thursday I found the same issue in the production code of a project I am working on in my real live job, which lead to an really wired issue.
That was the biggest facepalm ever:weary_face:
And the ultra sonic sensor is clicking itself. The sensor is just a speaker and an microphone. The speaker is clicking constantly and the microphone is picking up the clicking. I am pretty jung, it would drive me crazy if I have to sleep, or stay here the sensor for a long time. But with increasing age humans won’t hear it anymore. But I think animals like cats, dogs, birds, … do hear it better.
The more you know :sign_of_the_horns: