def SetSpeed(self, speed_val, channel=0):
    command = [135, channel, (speed_val & 127), ((speed_val >> 7) & 127)]
    self._SendCommand(command)
def SetSpeed(self, speed_val, channel=0):
    command = [135, channel, (speed_val & 127), ((speed_val >> 7) & 127)]
    self._SendCommand(command)