else { // digital sensor (PIR)
    if (value) { // we have movement
      if (sensorStates[sensor] != SENSOR_STATE_ABOVE) { // SENSOR_STATE_ABOVE
        sensorStates[sensor] = SENSOR_STATE_ABOVE;
        actOnCurrentCondition(sensor);
      }
    } else {
      if (sensorStates[sensor] == SENSOR_STATE_ABOVE) { // SENSOR_STATE_FROM_ABOVE
        sensorStates[sensor] = SENSOR_STATE_FROM_ABOVE;
        actOnCurrentCondition(sensor);
      } else if (sensorStates[sensor] == SENSOR_STATE_FROM_ABOVE) {
        sensorStates[sensor] = SENSOR_STATE_NORMAL;
        actOnCurrentCondition(sensor);
      }
    }
  }