Espressif Systems ESP User Manual

Chapter 3. application solution
3.6.15 Is there any reference for ESP32/ESP32-S2/ESP32-S3 to recognize the QR code
through the camera?
Yes, please refer to the code recognition in ESP-WHO.
3.6.16 When adding the SD-card interface and camera interface for OV5640 sensor, we
found that some pins of dierent ESP32 drivers conicted with each other. Please
suggest pins for the camera interface and SD-card interface.
ESP-WROVER-KIT development board includes the camera and SD card circuits, so you can refer to
pins con󰝘guration of ESP-WROVER-KIT V3 Getting Started Guide.
3.6.17 Can a driver for a specic camera model be added if the currently supported cam-
era sensors do not meet my requirements?
Yes. Please con󰝘rm your requirements and select the camera sensor model with our engineers through
technical support. We can then provide the corresponding driver for your camera sensor.
3.6.18 How to add a custom resolution?
Suppose you need a resolution of 640x240. You can add the custom resolution in two ways:
• Con󰝘gure the sensor to work at the typical resolution of 640x480 and only use the upper half of
the data (640x240).
• Add the identi󰝘er FRAMESIZE_640*240 in esp32-camera/driver/include/sensor.h,
and de󰝘ne the length and width of that resolution in esp32-camera/driver/sensor.c
<https://github.com/espressif/esp32-camera/blob/master/driver/sensor.c#L31>`__ as {640,
240, ASPECT_RATIO_16X9}. This method requires support for custom resolutions in the
sensor’s driver to work properly.
3.6.19 How to modify the register conguration of a camera sensor?
Suppose you want to change the register con󰝘guration of the OV5640 sensor. This can be achieved in
two ways:
• Directly con󰝘gure the relevant registers using write_reg() in the reset() function of esp32-
camera/sensors/ov5640.c.
• Con󰝘gure the relevant registers using set_reg() at the application level:
//Initialize the camera
esp_err_t ret = esp_camera_init(&camera_config);
sensor_t *s = esp_camera_sensor_get();
s->set_reg(s, 0xFFFA, 0xFF, 0xA1);
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Espressif Systems ESP Specifications

General

Brand	Espressif Systems
Model	ESP
Category	Motherboard
Language	English