Important changes to forums and questions
All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.
6 years, 6 months ago.
how to detect freefall in frdm-kl25z
does anyone know how to detect freefall in kl25z. i am using value <0.2 for all three axis to detect freefall and than blink the led. but as soon as i run the code, the led starts blinking.
kindly let me know if someone has a solution.
1 Answer
5 years, 11 months ago.
Can i see your code?
By all 3 axis do you mean individually or combined?
If individually are you using if(value < 0.2) or if (fabs(value) < 0.2)? Depending on orientation you could get -1 when sitting still.
If combined then this isn't an issue, it should be as simple as if ((x*x+y*y+z*z) < 0.04), (0.04 = 0.2 squared, it saves a square root operation)
posted by Andy A 23 May 2018