ESP32 WiFi Repeater | Range Extender

Introduction

This tutorial will guide you through the process of turning your ESP32 into a WiFi repeater, also known as a range extender. This project enhances your WiFi coverage, allowing you to connect both IoT devices and personal devices with improved speed and stability compared to the ESP8266.

Step 1: Gather Required Materials

Before you begin, ensure you have the following items:

• ESP32 Development Board
• USB Cable for connecting the ESP32 to your computer
• Computer with a compatible operating system (Windows, macOS, or Linux)
• Arduino IDE installed on your computer
• WiFi credentials (SSID and password) for the network you want to extend

Step 2: Install Required Libraries

To program the ESP32, you'll need to install some libraries in the Arduino IDE:

1. Open the Arduino IDE.
2. Go to Sketch > Include Library > Manage Libraries.
3. In the Library Manager, search for and install the following:
   • ESP32 Board (if not already installed)
   • WiFi library (usually included with the ESP32 board package)

Step 3: Download the Firmware

You will need to download the firmware for the ESP32 WiFi repeater:

1. Visit the GitHub repository for the ESP32 NAT Router:
   • ESP32 NAT Router GitHub Repo
2. Download the code as a ZIP file or clone the repository to your local machine.

Step 4: Configure the Code

1. Unzip the downloaded repository and open the folder in Arduino IDE.
2. Locate the main code file (usually named main.cpp or similar).
3. Update the following lines with your WiFi credentials:

   const char* ssid = "Your_SSID";
   const char* password = "Your_Password";
   

4. If additional configuration is required (like setting IP addresses), follow the comments in the code for guidance.

Step 5: Flash the Code to ESP32

1. Connect your ESP32 to your computer using the USB cable.
2. In the Arduino IDE, select the correct board:
   • Go to Tools > Board > select ESP32 Dev Module.
3. Select the appropriate COM port:
   • Go to Tools > Port > select the port your ESP32 is connected to.
4. Click the upload button (right arrow icon) to flash the code to the ESP32.

Step 6: Monitor Serial Output

1. After uploading, open the Serial Monitor in the Arduino IDE:
   • Go to Tools > Serial Monitor.
2. Set the baud rate to 115200.
3. Observe the output for confirmation that the ESP32 has connected to your existing WiFi network and is ready to act as a repeater.

Step 7: Connect to the Repeater

1. On your personal devices, search for the new WiFi network created by the ESP32.
2. Connect to this network using the credentials specified in the code.
3. Test your internet connection to ensure that the repeater is functioning correctly.

Conclusion

You have successfully set up your ESP32 as a WiFi repeater. This project not only extends your WiFi range but also enhances the connectivity of your IoT devices. For further improvements, consider experimenting with different configurations or integrating additional features. If you encounter any issues, refer back to the GitHub repository for troubleshooting tips or community support.