Fix for incorrect RPM reported.

2021-10-03 14:00:29 +02:00
parent 62e7c861bd
commit 783a21d88d
1 changed files with 2 additions and 1 deletions
--- a/usermods/PWM_fan/usermod_PWM_fan.h
+++ b/usermods/PWM_fan/usermod_PWM_fan.h
@@ -80,7 +80,8 @@ class PWMFanUsermod : public Usermod {
      // detach interrupt while calculating rpm
      detachInterrupt(digitalPinToInterrupt(tachoPin)); 
      // calculate rpm
-      last_rpm = counter_rpm * (60 / numberOfInterrupsInOneSingleRotation);
+      last_rpm = (counter_rpm * 60) / numberOfInterrupsInOneSingleRotation;
+      last_rpm /= tachoUpdateSec;
      // reset counter
      counter_rpm = 0; 
      // store milliseconds when tacho was measured the last time