Those you who have built your own advanced robots and drones have probably dealt with LiDAR sensors in the past. OWL-i is a compact, affordable one you can use to make your existing robots smarter. It has a dust and water resistant design and works with Arduino and Raspberry Pi.
OWL-i is Bluetooth enabled. It has an accuracy of +/- 2.5cm and adjustable range of up to 40m.