"ESP32 Ultrasonic Radar: A Real-Time Visualizer with Process

This project is a DIY Radar system that uses an ESP32 to control an HC-SR04 ultrasonic sensor mounted on an SG90S servo motor. The system scans a 180-degree area, detects obstacles, and sends the data to a PC. Using the Processing IDE, I built a custom graphical user interface (GUI) that visualizes the distance and angle of objects in real-time, mimicking a professional radar display.

How it Works

The project is divided into three main components:

The Scanner: The ESP32 rotates the MG90S servo from 15 to 165 degrees and back. At every degree, the HC-SR04 sensor triggers an ultrasonic pulse to measure the distance.

• The Scanner: The ESP32 rotates the MG90S servo from 15 to 165 degrees and back. At every degree, the HC-SR04 sensor triggers an ultrasonic pulse to measure the distance.

Data Transmission: The ESP32 sends the angle and distance values through the Serial port in a specific format: angle,distance..

• Data Transmission: The ESP32 sends the angle and distance values through the Serial port in a specific format: angle,distance..

The Visualization: A Processing script listens to the Serial port, parses the incoming data, and draws a green radar sweep. When an object is detected, it highlights the area in red.

• The Visualization: A Processing script listens to the Serial port, parses the incoming data, and draws a green radar sweep. When an object is detected, it highlights the area in red.

This project is a perfect introduction to sensor fusion and serial data visualization. Future improvements could include adding a second sensor for 3D mapping or connecting the ESP32 to Wi-Fi to view the radar data on a web-based dashboard.

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