ESP32 CAM – Wi-Fi and Bluetooth Board with OV2640 Camera



ESP32 + Cam OV2640 Dev Board

Lets Start with ESP32 Cam Bluetooth Board OV2640 Board


ESP32 Cam OV2640 Board is a very small camera module with a chip. Chip is ESP32-Cam. There are several GPIOs to connect peripherals. There is a slot for the microSD card. This microSD card slot is very useful to store images or it stores files to serve clients.



ESP 32-CAM is small size camera module. It can operate independently as a minimum system. It has a footprint of only 40 x 27mm and has a deep sleep current of up to 6mA. We use ESP32-CAM for various IoT applications. It is suitable for many applications like home smart devices, industrial wireless control, wireless monitoring, QR wireless identification, and wireless positioning system signals.

ESP32-Cam is an ideal solution for various IoT applications. ESP32-cam has a DIP package. ESP32-Cam can be directly inserted into the backplane. a backplane is used for the rapid production of products, providing customers with high-reliability connection mode. And it is convenient for application in various IoT hardware terminals.


These pins are internally connected to the microSD card reader:

  • GPIO 14 is for CLK pin
  • GPIO 15 is for CMD
  • GPIO 2  is for Data 0
  • GPIO 4 is for Data 1
  • GPIO 12 is for Data 2
  • GPIO 13 is for Data 3

ESP32 Cam OV2640 Spec


  • ESP32 Cam Bluetooth Board has the smallest Wifi module (802.11 b/g/n) and the SoC module.
  • The clock speed is 160MHz. almost 600 DMIPS.
  • SRAM is built-in 520 KB. And external is 4 MPSRAM.
  • It supports UART/SPI/12C/PWM/ADC/DAC.
  • CPU is 32-bit. And it can also serve the application processor.
  • It has a built-in flash lamp and it supports OV2640 and OV7670 cameras.
  • It supports image WiFi upload.
  • It supports TF card and multiple sleep modes.
  • It has embedded Lwip and FreeRTOS.
  • Its operation modes are STA/AP/STA+AP.
  • It supports the serial port. And remote firmware upgrade. (FOTA)


Board Layout of Cam OV2640



board layout of ESP32 Cam
board layout of ESP32 Cam



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