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Description of Components

ESP32-C3-DevKitC-02 - front

ESP32-C3-DevKitC-02 - front

The key components of the board are described in a counter-clockwise direction.

Key Component



ESP32-C3-WROOM-02 from Espressif is a powerful and general-purpose module that offers Wi-Fi and Bluetooth LE coexistence. It has a PCB antenna and a 4 MB SPI flash.

5 V to 3.3 V LDO

Power regulator that converts a 5 V supply into a 3.3 V output.

5 V Power On LED

Turns on when the USB power is connected to the board.

Pin Headers

All available GPIO pins (except for the SPI bus for flash) are broken out to the pin headers on the board. 

Boot Button

Download button. Holding down Boot and then pressing Reset initiates Firmware Download mode for downloading firmware through the serial port.

Micro-USB Port

USB interface. Power supply for the board as well as the communication interface between a computer and the ESP32-C3 chip.

Reset Button

Press this button to restart the system.

USB-to-UART Bridge

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


Addressable RGB LED, driven by GPIO8.