temperature_drop_sensor.h

// SPDX-FileCopyrightText: AC SOFTWARE SP. Z O.O.
// SPDX-License-Identifier: GPL-2.0-or-later
 
#ifndef SRC_SUPLA_SENSOR_TEMPERATURE_DROP_SENSOR_H_
#define SRC_SUPLA_SENSOR_TEMPERATURE_DROP_SENSOR_H_
 
#include <supla/element.h>
 
#include "virtual_binary.h"
#include "therm_hygro_meter.h"
 
namespace Supla {
namespace Sensor {
 
#define MAX_TEMPERATURE_MEASUREMENTS 60
 
class TemperatureDropSensor : public Supla::Element {
 public:
  explicit TemperatureDropSensor(ThermHygroMeter *thermometer);
 
  void onInit() override;
  void iterateAlways() override;
 
  bool isDropDetected() const;
  int getBinarySensorChannelNo() const;
 
  void setTemperatureDropThreshold(int16_t threshold);
 
  void setDropDetectionDelayMs(uint32_t delayMs);
 
 private:
  Supla::Sensor::VirtualBinary virtualBinary;
  ThermHygroMeter *thermometer = nullptr;
 
  int16_t getAverage(int fromIndex, int toIndex) const;
  bool detectTemperatureDrop(int16_t temperature, int16_t *average) const;
 
  uint32_t lastTemperatureUpdate = 0;
  uint32_t filteringTimestamp = 0;
  uint32_t dropDetectionTimestamp = 0;
  uint32_t probeIntervalMs = 30000;
  uint32_t dropDetectionDelayMs = 0;
 
  int16_t measurements[MAX_TEMPERATURE_MEASUREMENTS] = {};
  int measurementIndex = 0;
  int16_t temperatureDropThreshold = -200;  // -2 degree
  int16_t averageAtDropDetection = INT16_MIN;
};
 
}  // namespace Sensor
}  // namespace Supla
 
#endif  // SRC_SUPLA_SENSOR_TEMPERATURE_DROP_SENSOR_H_