@staticmethod
def control_led(led_id, state):
    """Generate a command to the set the state of a single LED.

        :param    int          led_id:   Led id 0..11
        :param    LedStatus    state:    The state to set
        :return: The PCK command (without address header) as text
        :rtype:  str
        """
    if led_id < 0 or led_id > 11:
        raise ValueError('Bad led_id.')
    return 'LA{:03d}{:2}'.format(led_id + 1, state.value)
