esp-who/examples/code_recognition

Code recognition Example

This example demonstrates how to decode 1D/2D barcode. Currectly, the formats that can be decoded by esp_code_scanner are:

• 1D barcode:
  • code39
  • code128
• 2D barcode:
  • QR code

How to Use Example

Before project configuration and build, be sure to set the correct chip target using idf.py set-target <chip_name>.

Hardware Required

• A development board with ESP32/ESP32-S2/ESP32-S3 SoC (e.g., ESP-EYE, ESP-WROVER-KIT, ESPS3-EYE etc.)
• A USB cable for Power supply and programming
• A Camera Module: OV2640/OV3660/GC0308/GC032A image sensor(recommended focal range: 5cm-20cm)
• A LCD(optional): ST7789/...

Note: the default OV2640 camera on the development board may not be suitable for this example.

Configure the Project

Some default settings have been set based on the development board using sdkconfig.defaults.<chip_name>

Build and Flash

Run idf.py -p PORT flash monitor to build, flash and monitor the project.

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example Output

Please make sure the code can be clearly captured. If a qrcode can be succesfully decoded, you will be able to see information displayed as below:

I (11164) APP_CODE_SCANNER: Decode time in 70 ms.
I (11164) APP_CODE_SCANNER: Decoded QR-Code symbol "测试"

Troubleshooting

For any technical queries, please open an issue on GitHub. We will get back to you soon.