Fix formula in getResistance(): 5.0 is unnecessary here

2015-07-08 19:06:07 +06:00
1 changed files with 1 additions and 1 deletions
--- a/MQ135.cpp
+++ b/MQ135.cpp
@ -52,7 +52,7 @@ float MQ135::getCorrectionFactor(float t, float h) {
 /**************************************************************************/
 float MQ135::getResistance() {
  int val = analogRead(_pin);
-  return ((1023./(float)val) * 5. - 1.)*RLOAD;
+  return ((1023./(float)val) - 1.)*RLOAD;
 }
 /**************************************************************************/