Espressif Systems ESP32-C3-DevKitC-02 User manual

ESP32‐C3‐DevKitC‐02
This user guide will help you get started with ESP32-C3-DevKitC-02 and will also
provide more in-depth information.
ESP32-C3-DevKitC-02 is an entry-level development board based on ESP32-C3-
WROOM-02 module. This board integrates complete Wi-Fi and Bluetooth LE functions.
Most of the I/O pins on the ESP32-C3-WROOM-02 module are broken out to the pin
headers on both sides of this board for easy interfacing. Developers can either connect
peripherals with jumper wires or mount ESP32-C3-DevKitC-02 on a breadboard.
ESP32-C3-DevKitC-02

Getting Started
This section provides a brief introduction of ESP32-C3-DevKitC-02, instructions on how
to do the initial hardware setup and how to flash firmware onto it.
Description of Components
ESP32-C3-DevKitC-02 - front
Key Component Description
ESP32-C3-
WROOM-02
ESP32-C3-WROOM-02 is a general-purpose Wi-Fi and Bluetooth
LE combo module that comes with a PCB antenna. At the core of
this module is ESP32-C3FN4, a chip that has an embedded flash of
4 MB. Since flash is packaged in the ESP32-C3FN4 chip, rather
than integrated into the module, ESP32-C3-WROOM-02 has a
smaller package size.
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.
I/O Connector
All available GPIO pins (except for the SPI bus for flash) are broken
out to the pin headers on the board. For details, please see Header
Block.

Key Component Description
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-
C3FN4 chip.
Reset Button Press this button to restart the system.
USB to UART
Bridge Single USB-UART bridge chip provides transfer rates up to 3 Mbps.
RGB LED Addressable RGB LED (WS2812), driven by GPIO8.
Start Application Development
Before powering up your ESP32-C3-DevKitC-02, please make sure that it is in good
condition with no obvious signs of damage.
Required Hardware
ESP32-C3-DevKitC-02
USB 2.0 cable (Standard-A to Micro-B)
Computer running Windows, Linux, or macOS
Software Setup
Please proceed to Get Started, where Section Installation Step by Step will quickly help
you set up the development environment and then flash an application example onto
your ESP32-C3-DevKitC-02.

Hardware Reference
Block Diagram
The block diagram below shows the components of ESP32-C3-DevKitC-02 and their
interconnections.
ESP32-C3-DevKitC-02 Block Diagram
Power Supply Options
There are three mutually exclusive ways to provide power to the board:
 Micro USB port, default power supply
 5V and GND header pins
 3V3 and GND header pins
It is recommended to use the first option: micro USB port.

Header Block
The two tables below provide the Name and Function of I/O header pins on both sides
of the board, as shown in ESP32-C3-DevKitC-02 - front.
J1
No. Name Type Function
1 GND G Ground
2 3V3 P 3.3 V power supply
3 3V3 P 3.3 V power supply
4 IO2 I/O/T GPIO2, ADC1_CH2, FSPIQ
5 IO3 I/O/T GPIO3, ADC1_CH3
6 GND G Ground
7 RST I CHIP_PU
8 GND G Ground
9 IO0 I/O/T GPIO0, ADC1_CH0, XTAL_32K_P
10 IO1 I/O/T GPIO1, ADC1_CH1, XTAL_32K_N
11 IO10 I/O/T GPIO10, FSPICS0
12 GND G Ground
13 5V P 5 V power supply
14 5V P 5 V power supply
15 GND G Ground

J3
No. Name Type Function
1 GND G Ground
2 TX I/O/T GPIO21, U0TXD
3 RX I/O/T GPIO20, U0RXD
4 GND G Ground
5 IO9 I/O/T GPIO9
6 IO8 I/O/T GPIO8
7 GND G Ground
8 IO7 I/O/T GPIO7, FSPID, MTDO
9 IO6 I/O/T GPIO6, FSPICLK, MTCK
10 IO5 I/O/T GPIO5, ADC2_CH0, FSPIWP, MTDI
11 IO4 I/O/T GPIO4, ADC1_CH4, FSPIHD, MTMS
12 GND G Ground
13 IO18 I/O/T GPIO18
14 IO19 I/O/T GPIO19
15 GND G Ground
P: Power supply; I: Input; O: Output; T: High impedance.

Pin Layout
ESP32-C3-DevKitC-02 Pin Layout