calculate-altitude
wayland/bmp280-barometer/calculate-altitude
Calculate altitude from atmospheric pressure.
calculate-altitude
@/calculate-altitude
Calculate altitude from atmospheric pressure.
PRESSnumber
Ambient atmospheric pressure in Pascal.
SeaLevnumber
Atmospheric pressure at sea level in Pascal.
ALTnumber
Altitude in metres.
C++ implementation
#pragma XOD dirtieness disable
node {
void evaluate(Context ctx) {
float altitude;
float pressure = getValue<input_PRESS>(ctx);
float seaLevelhPa = getValue<input_SeaLev>(ctx);
//pressure /= 100;
altitude = 44330 * (1.0 - pow(pressure / seaLevelhPa, 0.1903));
emitValue<output_ALT>(ctx, altitude);
}
}