ESP32 Obstacle Avoidance Robot 🤖🚀

Version 1.0 🏁

Build Information 📅

• Version: 1.0
• Release Date: 01-22-2025
• Author: Syntax-Surfer

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Project Overview 🎯

This project is an autonomous robot using the ESP32, three ultrasonic sensors, an L298N motor driver, and a servo motor. The robot detects obstacles, scans for the best path, and navigates accordingly.

Key Features ✨

✅ Real-time object detection using ultrasonic sensors (Front, Left, Right)
✅ Servo-based scanning to determine the best direction
✅ Smooth motor acceleration with PWM-based speed control
✅ Intelligent obstacle avoidance with decision-making logic
✅ PlatformIO Support for better development and debugging

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Components Used 🧰

• ESP32 Development Board
• L298N Motor Driver Module
• Ultrasonic Sensors (HC-SR04) ×3 (Front, Left, Right)
• Servo Motor (SG90 or MG995)
• Four DC Motors (For wheel movement)
• Power Supply (Li-Ion Battery)
• Jumper Wires & Breadboard

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Circuit Diagram 🖼️

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Libraries Required 📚

Install the following libraries in PlatformIO before uploading the code:

• ESP32Servo (For controlling the servo motor)
• NewPing (For ultrasonic sensor distance measurement)

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Pin Connections 🛠️

Ultrasonic Sensors (HC-SR04):

• Front Sensor:
  • TRIG Pin: GPIO 18
  • ECHO Pin: GPIO 19
• Left Sensor:
  • TRIG Pin: GPIO 15
  • ECHO Pin: GPIO 4
• Right Sensor:
  • TRIG Pin: GPIO 23
  • ECHO Pin: GPIO 22

Servo Motor:

• Signal Pin: GPIO 13
• VCC Pin: 5V
• GND Pin: GND

L298N Motor Driver:

• IN-1: GPIO 12
• IN-2: GPIO 14
• IN-3: GPIO 27
• IN-4: GPIO 26

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How to Run the Project 🚀

1. Set up PlatformIO in VS Code and create a new ESP32 project.
2. Install required libraries (ESP32Servo & NewPing) in PlatformIO.
3. Connect the components according to the wiring diagram.
4. Compile and upload the code to the ESP32 via USB.
5. Power the ESP32 and motor driver using an external power source.
6. Observe the robot's movement and obstacle detection.

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Adjustable Parameters 🔧

• OBJECT_THRESHOLD_FRONT, OBJECT_THRESHOLD_LEFT, OBJECT_THRESHOLD_RIGHT: Distance threshold (in cm) for object detection.
• OBJECT_DETECTION_DELAY: Delay after object detection (for better response time).
• LOOK_ANGLE: Maximum servo rotation angle.
• SPEED_INCREMENT: Motor speed ramp-up step (to prevent sudden jerks).

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Contact Information ✉️

For further inquiries or collaboration, feel free to reach out:

• Email: [email protected]
• GitHub: Syntax-Surfer-1 🌐

📌 Feel free to fork the repository and contribute! 🚀