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ESP32 Code Setup

This folder contains the Arduino code (CarControl.ino) for the ESP32 microcontroller, which manages the car’s movement, obstacle detection, Wi-Fi communication, and LED indicators. The code creates a Wi-Fi Access Point, processes HTTP GET requests from the Android app, and uses the HC-SR04 sensor to detect obstacles.

Requirements

  • Arduino IDE: Download from arduino.cc.
  • ESP32 Dev Module: Connected via USB.
  • ESP32 Board Manager: For Arduino IDE compatibility.

Setup

  1. Install Arduino IDE from arduino.cc.
  2. Add ESP32 board manager:
    • Go to File > Preferences.
    • Add https://dl.espressif.com/dl/package_esp32_index.json to Additional Boards Manager URLs.
    • Go to Tools > Board > Boards Manager, search esp32, and install.
  3. Open CarControl.ino in Arduino IDE.
  4. Select ESP32 Dev Module under Tools > Board.
  5. Connect the ESP32 via USB, select the correct port, and click Upload.
  6. Open Serial Monitor (115200 baud) to view:
    • Wi-Fi AP details (SSID: Savana Node 01, IP: 192.168.4.1).
    • Distance readings from HC-SR04.
    • Received HTTP commands.

Security Note

  • Wi-Fi Credentials: Update ssid and password in CarControl.ino before deploying in public settings. Default credentials (Savana Node 01, iloveindia) are for testing only.
  • Hardcoded IPs: Requests are processed at http://192.168.4.1/. Ensure the Android app targets this IP.

Notes

  • Circuit Verification: Ensure connections match Circuit Diagram.
  • Pin Configuration:
    • HC-SR04: Trigger (pin 5), Echo (pin 18).
    • LEDs: Left (pin 14), Right (pin 27).
    • Motors (via L293D): M1_A (pin 21), M1_B (pin 19), M2_A (pin 23), M2_B (pin 22).
  • Testing: Connect the Android app to the ESP32’s Wi-Fi AP and test all movements.
  • Debugging: Use Serial Monitor to troubleshoot sensor readings or Wi-Fi issues.

For hardware details, see Bill of Materials.