# stil need? dispatcher.send("send_to_hw", sub=sub.uri, hwCol=col + 1)

    def getVal(self) -> float:

        return self._val

    def setVal(self, newVal: float) -> None:

        if self.dead:

            return

        try:

            self.scale.set(newVal)

            self.levellabel.config(text=str(newVal))

        except Exception:

            self.dead = True

    def cleanup(self):

        self.slider_var.trace_vdelete('w', self._slider_var_trace)

    def slider_changed(self, *args):

        self._val = self.scale.get()

        self.scale.draw_indicator_colors()

        if self.pauseTrace:

            return

        self.updateGraphWithLevel(self.sub, self.getVal())