Espressif Systems ESP Faq page 48

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
3.6.16 When adding the SD-card interface and camera interface for OV5640 sensor, we
found that some pins of different ESP32 drivers conflicted with each other. Please
suggest pins for the camera interface and SD-card interface.
ESP-WROVER-KIT development board
pins configuration of
3.6.17 Can a driver for a specific camera model be added if the currently supported cam-
era sensors do not meet my requirements?
Yes. Please confirm 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:
• Configure the sensor to work at the typical resolution of 640x480 and only use the upper half of
the data (640x240).
• Add the identifier
and define 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>`__
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 configuration of a camera sensor?
Suppose you want to change the register configuration of the OV5640 sensor. This can be achieved in
two ways:
• Directly configure the relevant registers using write_reg() in the reset() function of esp32-
camera/sensors/ov5640.c.
• Configure the relevant registers using set_reg() at the application level:
//Initialize the camera
esp_err_t ret =
sensor_t *s = esp_camera_sensor_get();
s->set_reg(s, 0xFFFA, 0xFF, 0xA1);
Espressif Systems
code recognition in ESP-WHO.
includes the camera and SD card circuits, so you can refer to
ESP-WROVER-KIT V3 Getting Started
FRAMESIZE_640*240
esp_camera_init(&camera_config);
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Guide.
in esp32-camera/driver/include/sensor.h,
31
as {640,
Release master