An autonomous robot is a machine that will move without an operator guiding it. Autonomous robots always imply that there is a Microcontroller that will sense the environment and make motion "decisions". Truly autonomous robots, featuring vision and artificial intelligence, are the stuff of science fiction. However by providing a minimal amount of "senses" in the form of limit switches, video cameras, GPS, compass and other sensors, it is possible to build robots with limited but useful autonomy. Examples would be automatic guided vehicles following marks on the floor, automatic lawn movers, robot patrolling a preset perimeters, an more. For such robots the controller must have a way of talking with the microcomputer, which in the case of the AX2550, can be done using the serial port