Development of a Lidar‑Integrated Bluetooth Vehicle for Collision Prevention and Safety Alerts Using ESP32 Dev Module

This study presents a LiDAR-based obstacle detection system for a small-scale, Bluetooth-controlled vehicle. The purpose of the system is to take precise distance measurements and to activate automatic detection and avoidance of obstacles. The integration comprises an ESP32 microcontroller, LiDAR sensor, motor driver, DC motors, LCD display, and buzzer, all governed by the Dabble mobile application. The vehicle keeps on measuring the distances and when an obstacle is within a 3 cm threshold, the forward movement is stopped and visual and auditory alerts are triggered. The testing done in a control indoor environment revealed that the system was able to detect obstacles, give precise distance readings and respond instantly with no delay all the time. The simultaneous alerts increased usability and safety. In general, the system is a dependable, user-friendly solution for small robotic vehicles and it has potential for wider applications in areas such as IoT and robotics.