HID Devices - learn.adafruit.com
learn.adafruit.com › hid-devicesMay 20, 2021 · Those physical keys send both regular keyboard presses and Consumer Control presses. For example, you can send the regular keyboard keycode F4, or the Consumer Control code MUTE depending on whether you press the Fn key or not. Consumer Control codes are defined in this USB standards document (page 85).