The new Dreame Roboticmower A1 navigates on the lawn like a robot hoover in the home. It uses lidar to scan its surroundings - and can also avoid unexpected obstacles. Good robotic lawn mowers today need a perimeter wire. This means you have to mark out your lawn so that the robot knows where it can and cannot cut grass. This is tedious and time-consuming. Robots with navigation via camera, GPS and sensors have problems from time to time in tests, for example in the latest robot mower test by "Stiftung Warentest", where both models performed worse than the ch...