I want to calculate the tyre pressure of a car from OBD parameters. I don't want to take TPMS or any custom PID for this. One of the indirect method is the calculate:
((w_LF + w_RR) - (w_RF + w_LR)) / ((w_LF+w_RR+w_RF+w_LR)/4)
where w_LF is the angular velocity of the left-front wheel. Now the problem I am facing is how to calculate w_LF, w_RR, w_LR, w_RF and how to find what is the actual angular velocity at that instant while driving.
I want to point that there is a reduction in tire pressure by this method