There have been a number of successful attempts in designing obstacle avoiding
robots. These works differ by selection of sensors, path mapping process and the algorithms
applied to set the operational parameters. In this paper we present a los cost ultrasonic distance
sensor for obstacle avoidance for mobile robot navigation. The system is implemented using
microcontroller Arduino Uno, a Wi-Fi module, an Arduino motor shield driver which controls
the robot through the geared dc motors. The system showed good performance under various
lighting conditions. Experimental results with varied positions of obstacle show the flexibility
of the robot to avoid it and have shown a decent performance in our laboratory. The robot is
additionally ready to acknowledge victims before it, the sensing element system is extremely
low-cost as a result of it solely uses one distance sensing element
