With the increasing demand for security in various aspects of daily life, including homes, the need for reliable and costeffective security systems has increased. This paper presents an Internet of Things (IoT)-based approach to home security utilizing ultrasonic sensors and buzzer systems. The proposed system, implemented using Arduino microcontrollers, offers a wireless solution for detecting intruders within a specified range using ultrasonic sensors. Upon detecting an object, the system activates a piezoelectric buzzer, effectively acting as an alarm. Additionally, the sensor data is processed to generate a graphical representation, providing visual feedback on obstruction status. A servo motor is employed to rotate the ultrasonic sensor, extending the coverage area. The system's setup, working principle, advantages, drawbacks, and future scope are discussed, highlighting its potential for enhancing home security while offering flexibility for future enhancements and integration with advanced features.