i have apm 2.6 with quadcopter configuration .. it flies perfectly. but i wanted to add sonar to it for better altitude hold capabilities.. i have made the connections all right and also enables the range finder parameters correctly .. but no luck.. still shows 4.8 v

i thought sensor is bad so i gave the separate 0 v and 5 v respectively and the range was shown correctly .. thus i checked the sensor with arduino uno and the sensor is also working fine ...



so now i dont know what is the problem please help me out guys

Which Sonar module are you using ?

Sonar available in local market doesn't work with APM
They hv provided the link for particular sensor on their forum