This repository showcases a project that leverages the power of an ESP32 microcontroller and a TFT display to dynamically generate and display payment QR codes for UPI services such as Google Pay, Paytm, PhonePe, and others. By integrating with the qrcode_espi library, this project enables real-time creation and rendering of QR codes, facilitating seamless digital transactions.

• Dynamic QR Code Generation: Utilizes the qrcode_espi library to generate payment QR codes in real-time.
• UPI Integration: Supports various UPI services including Google Pay, Paytm, and PhonePe.
• TFT Display: Displays the generated QR codes on a vibrant TFT display, making it easy for users to scan and pay.
• ESP32 Based: Takes advantage of the versatile and powerful ESP32 microcontroller for efficient processing and connectivity.

• Hardware:

  • ESP32 microcontroller
  • TFT display compatible with the ESP32

• Libraries:

  • qrcode_espi for QR code generation
  • TFT_eSPI or any other suitable library for controlling the TFT display

1. Hardware Connections:

   • Connect the TFT display to the ESP32 according to the pin configuration mentioned in the library documentation.

2. Software Setup:

   • Clone this repository.
   • Install the required libraries (qrcode_espi and TFT_eSPI).
   • Obtain your UPI URL details and add them to the code.

3. UPI URL:

   • Open Google Pay or other UPI services, add any amount and generate a QR code.

     

   • Scan the generated QR code to obtain the UPI URL. Use QR scanner or scanqr.org.

   • You will get a URL similar to this(sample): upi://pay?pa=zesto@okaxis&pn=Zesto Ryu&am=20.00&cu=INR&aid=uGICvfGNncCpSg.

     

   • Modify the UPI and amount details in the URL to generate dynamic QR codes.

     

   • Apply your UPI URL to the code.

4. Running the Code:

   • Upload the example code to the ESP32 using the Arduino IDE or PlatformIO.
   • Modify the UPI URL with your UPI URL.
   • Ensure the ESP32 is connected to a power source and the TFT display is properly connected.
   • Compile and upload the code.
   • The ESP32 will generate and display the QR code dynamically on the TFT display.

Once set up, input the required amount via the serial monitor and the TFT display will show a QR code that can be scanned using any UPI-based payment app such as Google Pay, Paytm, or PhonePe. The QR code will direct the payer to the respective payment page, making transactions quick and convenient.

Contributions are welcome! If you have suggestions for improvements or new features, feel free to open an issue or submit a pull request.

This project is licensed under the MIT License.