Hi @submerged,
Are you talking joystick buttons or Cockpit on-screen buttons?
The depth sensors we sell all use I2C for communication, so assuming it’s one of those it will need to be plugged into an I2C port on your flight controller board.
It’s hard to provide much insight without further context, but that’s better placed in its own thread (e.g. in one of the relevant existing ones) to keep this thread about your main question.