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104 lines
2.3 KiB
C++
104 lines
2.3 KiB
C++
#pragma once
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//
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// FILE: MS5837.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.0
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// DATE: 2023-11-12
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// PURPOSE: Arduino library for MS5837 temperature and pressure sensor.
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// URL: https://github.com/RobTillaart/MS5837
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#include "Arduino.h"
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#include "Wire.h"
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// TODO OSR factor in code?
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#define MS5837_LIB_VERSION (F("0.1.0"))
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#define MS5803_TYPE_01 1
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#define MS5837_TYPE_02 2
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#define MS5837_TYPE_30 30
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class MS5837
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{
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public:
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MS5837(TwoWire *wire = &Wire);
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// MS5837-30bar = 0
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// MS5837-02bar = 1
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bool begin(uint8_t mathMode);
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bool isConnected();
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bool reset(uint8_t mathMode);
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uint8_t getType();
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uint8_t getAddress();
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//////////////////////////////////////////////////////////////////////
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//
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// READ
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//
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// call will block 3-40 milliseconds, depends on # bits.
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// bits = 8-12 (8-13 for the MS5837_02)
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bool read(uint8_t bits = 8);
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// see https://github.com/RobTillaart/pressure for conversions.
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// returns mBar
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float getPressure();
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// see https://github.com/RobTillaart/temperature for conversions.
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// returns Celsius
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float getTemperature();
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// compensate for actual air pressure if needed
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float getAltitude(float airPressure = 1013.25);
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//////////////////////////////////////////////////////////////////////
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//
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// DEPTH
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//
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// density is temperature dependent, see
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// https://www.usgs.gov/special-topics/water-science-school/science/water-density
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//
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// density water 20°C = 0.99802
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// density seawater is
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// density in grams / cm3 (so not in grams per liter
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void setDensity(float density = 0.99802);
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float getDensity();
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// returns meters (SI unit)
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// compensate for actual air pressure if needed
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float getDepth(float airPressure = 1013.25);
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protected:
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int command(uint8_t cmd);
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void initConstants(uint8_t mathMode);
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uint32_t readADC();
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uint8_t _address = 0x76; // fixed address
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TwoWire * _wire = NULL;
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float _pressure;
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float _temperature;
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float C[8];
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uint8_t _type;
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int _result;
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float _density = 0.99802; // water at 20 °C
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};
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//////////////////////////////////////////////////////////////////////
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//
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// DERIVED CLASSES
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//
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// MS5837_30 MS5837_02 etc ?
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// -- END OF FILE --
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