ESP32-C3-DevKitC-02

[中文]

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, a general-purpose module with 4 MB SPI flash. This board integrates complete Wi-Fi and Bluetooth LE functions.

Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-C3-DevKitC-02 on a breadboard.

ESP32-C3-DevKitC-02

ESP32-C3-DevKitC-02

The document consists of the following major sections:

  • Getting Started: Overview of ESP32-C3-DevKitC-02 and hardware/software setup instructions to get started.

  • Hardware Reference: More detailed information about the ESP32-C3-DevKitC-02’s hardware.

  • Hardware Revision Details: Revision history, known issues, and links to user guides for previous versions (if any) of ESP32-C3-DevKitC-02.

  • Related Documents: Links to related documentation.

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

ESP32-C3-DevKitC-02 - front

Key Component

Description

ESP32-C3-WROOM-02

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.

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.

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.

RGB LED

Addressable RGB LED, 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

Note

Be sure to use a good quality USB cable. Some cables are for charging only and do not provide the needed data lines nor work for programming the boards.

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 into your ESP32-C3-DevKitC-02.

Contents and Packaging

Retail orders

If you order a few samples, each ESP32-C3-DevKitC-02 comes in an individual package in either antistatic bag or any packaging depending on your retailer.

For retail orders, please go to https://www.espressif.com/en/company/contact/buy-a-sample.

Wholesale Orders

If you order in bulk, the boards come in large cardboard boxes.

For wholesale orders, please go to https://www.espressif.com/en/contact-us/sales-questions.

Hardware Reference

Block Diagram

The block diagram below shows the components of ESP32-C3-DevKitC-02 and their interconnections.

ESP32-C3-DevKitC-02 (click to enlarge)

ESP32-C3-DevKitC-02 (click to enlarge)

Power Supply Options

There are three mutually exclusive ways to provide power to the board:

  • Micro-USB port, default power supply

  • 5V and GND pin headers

  • 3V3 and GND pin headers

It is recommended to use the first option: micro-USB port.

Header Block

The two tables below provide the Name and Function of the pin headers on both sides of the board (J1 and J3). The pin header names are shown in ESP32-C3-DevKitC-02 - front. The numbering is the same as in the ESP32-C3-DevKitC-02 Schematic (PDF).

J1

No.

Name

Type 1

Function

1

G

G

Ground

2

3V3

P

3.3 V power supply

3

3V3

P

3.3 V power supply

4

RST

I

CHIP_PU

5

G

G

Ground

6

4

I/O/T

GPIO4, ADC1_CH4, FSPIHD, MTMS

7

5

I/O/T

GPIO5, ADC2_CH0, FSPIWP, MTDI

8

6

I/O/T

GPIO6, FSPICLK, MTCK

9

7

I/O/T

GPIO7, FSPID, MTDO

10

G

G

Ground

11

8

I/O/T

GPIO8 2, RGB LED

12

9

I/O/T

GPIO9 2

13

5V

P

5 V power supply

14

5V

P

5 V power supply

15

G

G

Ground

J3

No.

Name

Type 1

Function

1

G

G

Ground

2

0

I/O/T

GPIO0, ADC1_CH0, XTAL_32K_P

3

1

I/O/T

GPIO1, ADC1_CH1, XTAL_32K_N

4

2

I/O/T

GPIO2 2, ADC1_CH2, FSPIQ

5

3

I/O/T

GPIO3, ADC1_CH3

6

G

G

Ground

7

10

I/O/T

GPIO10, FSPICS0

8

G

G

Ground

9

RX

I/O/T

GPIO20, U0RXD

10

TX

I/O/T

GPIO21, U0TXD

11

G

G

Ground

12

18

I/O/T

GPIO18

13

19

I/O/T

GPIO19

14

G

G

Ground

15

G

G

Ground

1(1,2)

P: Power supply; I: Input; O: Output; T: High impedance.

2(1,2,3)

GPIO2, GPIO8, and GPIO9 are strapping pins of the ESP32-C3 chip. During the chip’s system reset, the latches of the strapping pins sample the voltage level as strapping bits, and hold these bits until the chip is powered down or shut down. For description and application of strapping pins, please refer to Section Strapping Pins in ESP32-C3 Datasheet.

Pin Layout

ESP32-C3-DevKitC-02 (click to enlarge)

ESP32-C3-DevKitC-02 Pin Layout (click to enlarge)

Hardware Revision Details

No previous versions available.