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4 changes: 2 additions & 2 deletions MQ135.h
Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ v1.0 - First release
#endif

/// The load resistance on the board
#define RLOAD 10.0
#define RLOAD 22.0
/// Calibration resistance at atmospheric CO2 level
#define RZERO 76.63
/// Parameters for calculating ppm of CO2 from sensor resistance
Expand All @@ -36,7 +36,7 @@ v1.0 - First release
#define CORD 0.0018

/// Atmospheric CO2 level for calibration purposes
#define ATMOCO2 397.13
#define ATMOCO2 400.13

class MQ135 {
private:
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