Tech/HowTo/Logitech Dongle

Logitch Unified Bluetooth controllers are not labeled for the device they come with. You can reprogram them and do many cool things. Solaar can be used to help you find what the dongle is programmed to connect to.

apt-get -qq install solaar
solaar show
solaar version 1.1.8+dfsg-2

Unifying Receiver
  Device path  : /dev/hidraw3
  USB id       : 046d:C52B
  Serial       : F4B694B8
    Firmware   : 12.09.B0030
    Bootloader : 04.16
    Other      : AA.AA
  Has 1 paired device(s) out of a maximum of 6.
  Notifications: wireless, software present (0x000900)
  Device activity counters: (empty)

  1: MX Ergo
     Device path  : /dev/hidraw4
     WPID         : 406F
     Codename     : MX Ergo
     Kind         : trackball
     Protocol     : unknown (device is offline)
     Polling rate : 8 ms (125Hz)
     Serial number: E3B97282
     The power switch is located on the base.
     Battery: unknown (device is offline).

Resources

• https://github.com/pwr-Solaar/Solaar