m5::unit::spa06::Data Struct Reference

One SPA06 sample: a 6-byte burst from PSR_B2 (0x00) = PSR(24) + TMP(24), big-endian. More...

#include <unit_SPA06_data.hpp>

Public Member Functions
int32_t	psr_raw () const
	Raw pressure (24-bit 2's complement)
int32_t	tmp_raw () const
	Raw temperature (24-bit 2's complement)
float	temperature () const
	Compensated temperature (Celsius); NaN if not populated/measured.
float	celsius () const
	Compensated temperature (Celsius)
float	fahrenheit () const
	Compensated temperature (Fahrenheit)
float	pressure () const
	Compensated pressure (hPa); NaN if not populated/measured.

Public Attributes
std::array< uint8_t, 6 >	raw {}
	PSR B2/B1/B0 + TMP B2/B1/B0.
coeffs_t	coeffs {}
	Calibration coefficients for compensation.
float	kp {}
	Pressure scale factor kP at measurement time (0 = not populated)
float	kt {}
	Temperature scale factor kT at measurement time (0 = not populated)

Detailed Description

One SPA06 sample: a 6-byte burst from PSR_B2 (0x00) = PSR(24) + TMP(24), big-endian.

Member Data Documentation

coeffs

coeffs_t m5::unit::spa06::Data::coeffs {}

Calibration coefficients for compensation.

Note

Stored by value (self-contained): unlike BMP280/QMP6988 whose calibration never changes, kP/kT below change with the oversampling of each measurement, so a pointer to unit state would go stale. Held all-by-value so a Data stays valid regardless of later config changes or unit lifetime.