NOTE: This design has 38 pins.

ESP32 is at the core of this dev kit.

EN Reset button.

Single USB-UART bridge chip provides transfer rates of up to 3 Mbps.

USB interface.

Power supply for the board as well as the communication interface between a computer and the ESP32-WROOM-32 module.

Turns on when the USB or an external 5V power supply is connected to the board.

Most of the pins on the ESP module are broken out to the pin headers on the board.

You can the program ESP32 to enable multiple functions such as PWM, ADC, DAC, I2C, I2S, SPI, etc.

ESP32-WROOM-32D and ESP32-WROOM-32U are powerful, generic Wi-Fi + Bluetooth + Bluetooth LE MCU modules that target a wide variety of applications,

ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding.

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Difference Between WROOM 32D and WROOM 32U:

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ESP32-WROOM-32U is different from ESP32-WROOM-32D in that ESP32-WROOM-32U integrates a connector to connect an external antenna.