@type t() :: %APM.Message.DigicamControl{
  command_id: MAVLink.Types.uint8_t(),
  extra_param: MAVLink.Types.uint8_t(),
  extra_value: Float32,
  focus_lock: MAVLink.Types.uint8_t(),
  session: MAVLink.Types.uint8_t(),
  shot: MAVLink.Types.uint8_t(),
  target_component: MAVLink.Types.uint8_t(),
  target_system: MAVLink.Types.uint8_t(),
  zoom_pos: MAVLink.Types.uint8_t(),
  zoom_step: MAVLink.Types.int8_t()
}