text: """
  Scanning in legacy Bluetooth mode shows devices in discoverable pairing mode.
  Only a few devices like TVs might stick in discoverable mode semi-permanently.
  
  BLE scans as in ble_scan.py are usually needed for human mobility detection.
  The legacy Bluetooth used by bt_scan.py will usually not find enough
  non-fixed devices.
  """
  
  import bluetooth
  
  disc_devs = bluetooth.discover_devices(duration=5)
  print(f"Found {len(disc_devs)} devices.")
  
  for a, n in disc_devs:
      print(a, n)
  