Lots of "pc103_**" in known_devices.yaml

I by chance looked in my known_devices.yaml and noticed I have probably 30+ entries of this format in between all the “real” devices:

pc103_12:
  hide_if_away: false
  icon:
  mac: ''
  name: PC-103
  picture:
  track: false

pc103_13:
  hide_if_away: false
  icon:
  mac: ''
  name: PC-103
  picture:
  track: false

pc103_14:
  hide_if_away: false
  icon:
  mac: ''
  name: PC-103
  picture:
  track: false

pc103_15:
  hide_if_away: false
  icon:
  mac: ''
  name: PC-103
  picture:
  track: false

pc103_16:
  hide_if_away: false
  icon:
  mac: ''
  name: PC-103
  picture:
  track: false

Any idea where such thing without bluetooth nor mac address is coming from ?

What are you using as your presence detection sensor?

Oh, its some data from cellphone logged into network, or camera movement, and etc

Que? What are you on about?

device_tracker:
  • platform: swisscom
    new_device_defaults:
    track_new_devices: false
  • platform: bluetooth_tracker