Correcting coefficient in alt calculation. Fixes issue #30

nseidle · nseidle · commit 035bdd9755d4 · 2018-12-10T14:51:55.000-07:00
diff --git a/src/SparkFunBME280.cpp b/src/SparkFunBME280.cpp
@@ -418,7 +418,8 @@ float BME280::readFloatAltitudeMeters( void )
 {
 	float heightOutput = 0;
 	
-	heightOutput = ((float)-45846.2)*(pow(((float)readFloatPressure()/(float)_referencePressure), 0.190263) - (float)1);
+	//heightOutput = ((float)-45846.2)*(pow(((float)readFloatPressure()/(float)_referencePressure), 0.190263) - (float)1);
+	heightOutput = ((float)-44330.77)*(pow(((float)readFloatPressure()/(float)_referencePressure), 0.190263) - (float)1); //Corrected, see issue 30
 	return heightOutput;
 	
 }

Original file line number	Diff line number	Diff line change
`@@ -418,7 +418,8 @@ float BME280::readFloatAltitudeMeters( void )`
`418`	`418`	`{`
`419`	`419`	`float heightOutput = 0;`
`420`	`420`
`421`		`- heightOutput = ((float)-45846.2)*(pow(((float)readFloatPressure()/(float)_referencePressure), 0.190263) - (float)1);`
	`421`	`+ //heightOutput = ((float)-45846.2)*(pow(((float)readFloatPressure()/(float)_referencePressure), 0.190263) - (float)1);`
	`422`	`+ heightOutput = ((float)-44330.77)*(pow(((float)readFloatPressure()/(float)_referencePressure), 0.190263) - (float)1); //Corrected, see issue 30`
`422`	`423`	`return heightOutput;`
`423`	`424`
`424`	`425`	`}`