ESP32-C3-LCD-Ev-Board

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This user guide will help you get started with ESP32-C3-LCD-Ev-Board and will also provide more in-depth information.

The document consists of the following sections:

Board Overview

ESP32-C3-LCD-Ev-Board is an ESP32-C3-based evaluation development board with an SPI interface display. It also has an integrated rotary encoder switch and features screen interaction. Due to its low cost, low power consumption, and high performance, ESP32-C3 satisfies the basic GUI interaction needs, gaining ground in scenarios with small screen sizes.

ESP32-C3-LCD-Ev-Board with ESP32-C3-MINI-1 Module

ESP32-C3-LCD-Ev-Board with ESP32-C3-MINI-1 Module

Feature List

The main features of the board are listed below:

  • Module Embedded: ESP32-C3-MINI-1 module with 4 MB flash and 400 KB SRAM

  • Display: Compatibility with various subboards and support for displays with I2C and SPI interfaces. Please refer to LCD Subboards for more information

  • Rotary Encoder Switch: Key switches and 360° rotation for on-screen GUI control

  • USB: USB Type-C download/debug

Block Diagram

The block diagram below shows the components of ESP32-C3-LCD-Ev-Board and their interconnections.

ESP32-C3-LCD-Ev-Board Block Diagram (Click to Enlarge)

ESP32-C3-LCD-Ev-Board Block Diagram (Click to Enlarge)

Description of Components

The ESP32-C3-LCD-Ev-Board development board consists of a mainboard and a subboard.

Mainboard

ESP32-C3-LCD-Ev-Board_MB is the core of the kit, which integrates the ESP32-C3-MINI-1 module and provides ports for connection to the LCD subboard.

ESP32-C3-LCD-Ev-Board - Front (Click to Enlarge)

ESP32-C3-LCD-Ev-Board - Front (Click to Enlarge)

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

Key Component

Description

ESP32-C3-MINI-1 Module

ESP32-C3-MINI-1 is a generic Wi-Fi + Bluetooth LE MCU module that is built around the ESP32-C3 series of SoCs. It is integrated with 4 MB flash and 400 KB SRAM.

Reset Button

Press this button to reset the system.

Reserved IO Connector

Connects the system power supply pins and some reserved module pins via a 2.54 mm pitch connector.

LED

Supports configuring the RGB LED display to indicate status or behavior.

ESP-Prog Connector

Connects the Program interface of ESP-Prog for firmware download and debugging via a 1.27 mm pitch connector.

Power Switch

Power Toggle ON/OFF: Toggle ON to power on the board and OFF to power off the board.

USB-to-USB Port

Provides power to the entire system. It is recommended to use at least a 5V/2A power adapter to ensure a stable power supply. Used for USB communication between the PC side and the ESP32-C3-MINI-1 module.

Screen Connector

Connects the 1.28” LCD subboard via a 2.54 mm pitch connector.

Rotary Encoder Switch

Features both a 360° rotary encoder and a key switch to enable control of the on-screen GUI.

Boot Button

Holding down the Boot key and momentarily pressing the Reset key initiates the firmware upload mode. Then you can upload firmware through the serial port or USB.

LCD Subboards

The ESP32-C3-LCD-Ev-Board_DB subboard supports a 1.28” LCD screen with SPI interface and 240x240 resolution. The driver chip used for this screen is GC9A01.

ESP32-C3-LCD-Ev-Board_DB - Front (Click to Enlarge)

ESP32-C3-LCD-Ev-Board_DB - Front (Click to Enlarge)

ESP32-C3-LCD-Ev-Board_DB - Back (Click to Enlarge)

ESP32-C3-LCD-Ev-Board_DB - Back (Click to Enlarge)

Software Support

The ESP32-C3-LCD-Ev-Board development framework is ESP-IDF. ESP-IDF is a FreeRTOS-based SoC development framework with a bunch of components including LCD, ADC, RMT, and SPI.

Start Application Development

This section provides instructions on how to do hardware and software setup and flash firmware onto the board to develop your own application.

Required Hardware

  • 1 x ESP32-C3-LCD-Ev-Board_MB

  • 1 x LCD subboard

  • 1 x USB 2.0 cable (standard Type-A to Type-C)

  • 1 x PC (Windows, Linux, or macOS)

Note

Please make sure to use the appropriate USB cable. Some cables can only be used for charging, not for data transfer or program flashing.

Hardware Setup

Prepare the board for loading of the first sample application:

  1. Connect the LCD subboard to the LCD Board Connector.

  2. Plug in the USB cable to connect the PC with the board.

  3. The LCD lights up and you can start to interact with it.

Now the board is ready for software setup.

Software Setup

To learn how to quickly set up your development environment, please go to Get Started > Installation.

For more software information on developing applications, please go to Software Support.

Hardware Reference

This section provides more detailed information about the board’s hardware.

GPIO Allocation

The table below provides the allocation of GPIOs exposed on terminals of ESP32-C3-MINI-1 module to control specific components or functions of the board.

ESP32-C3-MINI-1 GPIO Allocation

Pin

Pin Name

Function

1

GND

Ground

2

GND

Ground

3

3V3

Power supply

4

NC

No connection

5

IO2

Reserved

6

IO3

Reserved

7

NC

No connection

8

EN

Reset

9

NC

No connection

10

NC

No connection

11

GND

Ground

12

IO0

LCD_SDA

13

IO1

LCD_SCL

14

GND

Ground

15

NC

No connection

16

IO10

LCD_CS

17

NC

No connection

18

IO4

LCD_D/C

19

IO5

LCD_BL_CTRL

20

IO6

ENCODER_B

21

IO7

ENCODER_A

22

IO8

LED

23

IO9

BOOT, ENCODER_SW

24

NC

No connection

25

NC

No connection

26

IO18

Reserved

27

IO19

Reserved

28

NC

No connection

29

NC

No connection

30

RXD0

RXD0

31

TXD0

TXD0

32-35

NC

No connection

36-53

GND

Ground

Power Distribution

The development board is powered via the USB-to-USB port:

ESP32-C3-LCD-Ev-Board - USB-to-USB Power Supply

ESP32-C3-LCD-Ev-Board - USB-to-USB Power Supply

Output system power supply:

ESP32-C3-LCD-Ev-Board - System Power Supply

ESP32-C3-LCD-Ev-Board - System Power Supply

Hardware Setup Options

Automatic Download

There are two ways to put the development board into download mode.

  • Press the Boot and Reset buttons. Release the Reset button first and then the Boot button.

  • Controls the status of the EN and IO9 pins of the ESP development board by ESP-Prog.

Hardware Revision Details

No previous revisions.

Sample Request

Not available.