mirror of
https://github.com/RobTillaart/Arduino.git
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129 lines
4.0 KiB
C++
129 lines
4.0 KiB
C++
#pragma once
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//
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// FILE: I2C_ASDX.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.3.2
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// PURPOSE: Arduino library for I2C ASDX pressure sensor
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// URL: https://github.com/RobTillaart/I2C_ASDX
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//
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// HISTORY: see changelog.md
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// TESTED TYPES - type A 10% - 90% only
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//
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// ADDRESS PRESSURE RANGE TYPE P A T V
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// 0x58 100 psi 0..6895 mBar SSCDANN 100PG 5 A 5
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// 0x38 60 psi 0..4137 mbar SSCDANN 060PG 3 A 5
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// 0x28 30 psi 0..2068 mbar SSCDANN 030PG 2 A 5
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//
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// P = pressure range
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// A = I2C address indicator
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// T = accuracy range
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// V = voltage (3 volt also supported, not tested)
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//
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#include "Wire.h"
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#include "Arduino.h"
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#define I2C_ASDX_VERSION (F("0.3.2"))
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// factors to convert PSI to mBar and back
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#define PSI2MILLIBAR 68.9475729
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#define MILLIBAR2PSI 0.01450377377
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#define PSI2BAR 0.0689475729
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#define BAR2PSI 14.503773773
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// factors to convert from mBar to different units
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// note: different sources give slightly different values
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#define MILLIBAR2BAR 0.001
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#define MILLIBAR2ATM 9.872e-4
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#define MILLIBAR2DYNES 1000
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#define MILLIBAR2INHG 2.9539e-2
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#define MILLIBAR2INH2O 0.4018
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#define MILLIBAR2PASCAL 100
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#define MILLIBAR2TORR 0.75028
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#define MILLIBAR2CMHG 0.075028
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#define MILLIBAR2CMH2O 1.02056
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#define MILLIBAR2MSW 100
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#define I2C_ASDX_OK 1
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#define I2C_ASDX_INIT 0
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#define I2C_ASDX_READ_ERROR -1
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#define I2C_ASDX_C000_ERROR -2
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#define I2C_ASDX_CONNECT_ERROR -3
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class I2C_ASDX
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{
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public:
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// psi: 100, 60, 30, 15, 5 or 1
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I2C_ASDX(uint8_t address, uint8_t psi, TwoWire *wire = &Wire);
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#if defined (ESP8266) || defined(ESP32)
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bool begin(uint8_t sda, uint8_t scl);
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#endif
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bool begin();
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void reset();
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bool isConnected();
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bool available() { return isConnected(); }; // obsolete in future
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// returns status OK (0) or ERROR ( not 0 )
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int read();
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// returns the pressure of last successful read in mbar
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int getPressure() { return round(_pressure); };
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float getMilliBar() { return _pressure; };
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float getBar() { return _pressure * MILLIBAR2BAR; };
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float getPSI() { return _pressure * MILLIBAR2PSI; };
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// conversions added 0.2.3
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float getATM() { return _pressure * MILLIBAR2ATM; }
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float getDynes() { return _pressure * MILLIBAR2DYNES; }
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float getInchHg() { return _pressure * MILLIBAR2INHG; }
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float getInchH2O() { return _pressure * MILLIBAR2INH2O; }
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float getPascal() { return _pressure * MILLIBAR2PASCAL; }
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float getTORR() { return _pressure * MILLIBAR2TORR; }
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float getCmHg() { return _pressure * MILLIBAR2CMHG; }
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float getCmH2O() { return _pressure * MILLIBAR2CMH2O; }
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float getMSW() { return _pressure * MILLIBAR2MSW; }
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// # errors since last good read
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uint16_t errorCount() { return _errorCount; };
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// timestamp of last good read
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uint32_t lastRead() { return _lastRead; };
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// get the last state
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int state() { return _state; };
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private:
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uint8_t _address;
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TwoWire* _wire;
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float _maxPressure;
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float _pressure;
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uint8_t _state;
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uint32_t _errorCount;
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uint32_t _lastRead;
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};
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// Convertors ==> see pressure library.
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/*
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static float MilliBar2PSI( float mbar ) { return mbar * MILLIBAR2PSI; };
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static float MilliBar2Bar( float mbar ) { return mbar * 0.001; };
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static float Bar2MilliBar( float bar ) { return bar * 1000; };
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static float Bar2PSI( float bar ) { return bar * BAR2PSI; };
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static float PSI2MilliBar( float PSI ) { return PSI * PSI2MILLIBAR; };
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static float PSI2Bar( float PSI ) { return PSI * PSI2BAR; };
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*/
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// -- END OF FILE --
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