adjusted ADC2 calibration for O2 sensor

001b25df · Derick · 126dcdb0 · 001b25df
Commit 001b25df authored Jan 26, 2021 by Derick
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common.cpp arduino/hev_prototype_v1/src/common.cpp +4 -2

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--- a/arduino/hev_prototype_v1/src/common.cpp
+++ b/arduino/hev_prototype_v1/src/common.cpp
@@ -243,8 +243,10 @@ float adcToO2PercentFloat(float adc, float offset)
    float PCB_Gain		= 4.		; // real voltage is 4 times higher thant the measured in the PCB (there is a voltage divider)
    float Sensor_Gain		= 100./10000.	; // the sensor gain is 100 % / 10000 mVolts
    float ADC_to_Voltage_Gain	= 3300./4096.0  ; // maximum Voltage of 3.3V for 4096 ADC counts - (It might need recalibration?)
-    
-    float o2pc = PCB_Gain * Sensor_Gain * ADC_to_Voltage_Gain * (adc - offset); 
+    float ADC_to_mVoltage_Gain	= 0.788; 	// this is the measured gain
+    float ADC_offset		= 162.;		// this is the measured offset
+
+    float o2pc = PCB_Gain * Sensor_Gain * (ADC_to_mVoltage_Gain * adc - ADC_offset); 

    return o2pc;
 }