Continuing the discussion from I need help about Lidar!:
Buy a lidar that is ArduPilot compatible.
Configure it like described in the ArduPilot documentation
Ask questions if something is not clear
i am using TF02-PRO LIDAR,THAT IS CONNECTED TO MY CUBEORANGE PIXHAWK BOARD I AM GETTING RANGE VALUES IN MISSION PLANNER ALSO BUT I WANT TO KNOW HOW TO CONTROL OBJECT AVOIDANCE WITH THAT LIDAR FOR MY ROVER (MOTOR CONTROL),I MEAN HOW TO CHANGE PARAMETERS VALUES IN MISIION PLANNER
With a single (or multiple) LIDAR/Rangefinder you need to set the PRX1_TYPE to 4
Then you can start doing Proximity and Avoidance things