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Use constexpressions instead of #defines in MQ131.h #62

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Use constexpressions instead of #defines in MQ131.h #62

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e6660e2
Use constexpressions instead of #defines in MQ131.h
TheZitroX Mar 17, 2025
32cd9e1
Use pragma once instead of #define
TheZitroX Mar 17, 2025
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23 changes: 10 additions & 13 deletions src/MQ131.h
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Original file line number Diff line number Diff line change
Expand Up @@ -28,21 +28,20 @@
* SOFTWARE.
*******************************************************************************/

#ifndef _MQ131_H_
#define _MQ131_H_
#pragma once

#include <Arduino.h>

// Default values
#define MQ131_DEFAULT_RL 1000000 // Default load resistance of 1MOhms
#define MQ131_DEFAULT_STABLE_CYCLE 15 // Number of cycles with low deviation to consider
// the calibration as stable and reliable
#define MQ131_DEFAULT_TEMPERATURE_CELSIUS 20 // Default temperature to correct environmental drift
#define MQ131_DEFAULT_HUMIDITY_PERCENT 65 // Default humidity to correct environmental drift
#define MQ131_DEFAULT_LO_CONCENTRATION_R0 1917.22 // Default R0 for low concentration MQ131
#define MQ131_DEFAULT_LO_CONCENTRATION_TIME2READ 80 // Default time to read before stable signal for low concentration MQ131
#define MQ131_DEFAULT_HI_CONCENTRATION_R0 235.00 // Default R0 for high concentration MQ131
#define MQ131_DEFAULT_HI_CONCENTRATION_TIME2READ 80 // Default time to read before stable signal for high concentration MQ131
constexpr int MQ131_DEFAULT_RL 1000000 // Default load resistance of 1MOhms
constexpr int MQ131_DEFAULT_STABLE_CYCLE 15 // Number of cycles with low deviation to consider
// the calibration as stable and reliable
constexpr int MQ131_DEFAULT_TEMPERATURE_CELSIUS 20 // Default temperature to correct environmental drift
constexpr int MQ131_DEFAULT_HUMIDITY_PERCENT 65 // Default humidity to correct environmental drift
constexpr float MQ131_DEFAULT_LO_CONCENTRATION_R0 1917.22 // Default R0 for low concentration MQ131
constexpr int MQ131_DEFAULT_LO_CONCENTRATION_TIME2READ 80 // Default time to read before stable signal for low concentration MQ131
constexpr float MQ131_DEFAULT_HI_CONCENTRATION_R0 235.00 // Default R0 for high concentration MQ131
constexpr int MQ131_DEFAULT_HI_CONCENTRATION_TIME2READ 80 // Default time to read before stable signal for high concentration MQ131

enum MQ131Model {LOW_CONCENTRATION, HIGH_CONCENTRATION,SN_O2_LOW_CONCENTRATION};
enum MQ131Unit {PPM, PPB, MG_M3, UG_M3};
Expand Down Expand Up @@ -133,5 +132,3 @@ class MQ131Class {
};

extern MQ131Class MQ131;

#endif // _MQ131_H_