ESP32-S3-Touch-LCD-7B

Product Overview

Product Introduction

This is a low-cost, high-performance MCU development board designed by Waveshare. It supports 2.4GHz Wi-Fi and BLE 5, integrates large-capacity Flash and PSRAM, and features an onboard 7inch capacitive touch LCD screen, enabling smooth operation of GUI programs like LVGL. Combined with various peripheral interfaces (such as CAN, I2C, and RS485), it facilitates rapid development of HMI and other applications for the ESP32-S3. With a wide range of functions and interfaces, it can meet power consumption requirements in Internet of Things (IoT), mobile devices, smart home and other applications.

SKU	Product
31726	ESP32-S3-Touch-LCD-7B
31727	ESP32-S3-LCD-7B

Features

• Equipped with a high-performance Xtensa 32-bit LX7 dual-core processor clocked at up to 240MHz
• Supports 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) with an onboard antenna
• Built-in 512KB SRAM and 384KB ROM, stacked with 16MB Flash and 8MB PSRAM
• Onboard 7inch LCD screen with 1024 × 600 resolution, 65K colors
• Supports I2C interface for capacitive touch control (optional), 5-point touch, with interrupt support
• Onboard CAN, RS485, I2C interfaces, TF card slot, and integrated full-speed USB
• Onboard LED indicators for indicating the power and battery charging status
• Supports adjusting the backlight brightness and reading the current battery voltage
• Supports precise control features like flexible clocking and independent module power supply settings, enabling low-power modes for multiple scenarios

Onboard Resources

1. ESP32-S3-WROOM-1-N16R8 Module
   WiFi/Bluetooth SoC module, 240MHz operating frequency, stacked with 8MB PSRAM and 16MB Flash
2. Display Panel Connector
3. Touch Panel Connector
4. TF Card Slot
5. USB Type-C Port
6. USB TO UART Type-C Port
7. UART Header
   Items 6 and 7 share the same UART, selectable via the UART selection switch
8. I2C Header
9. Sensor Header
10. CAN Header
11. RS485 Header
    Screen backlight boost chip
12. 5V Output

13. 3.7V Single-cell Lithium Battery PH2.0 Header
14. CAN Terminal Resistor Selection Interface
15. RS485 Terminal Resistor Selection Interface
16. UART Selection Switch
    Selects between UART1 and UART2
17. BOOT Button
    Press and hold while powering on for program flashing
18. RESET Button
    Press to reset the controller
19. DONE
    Lithium battery charge complete indicator
20. CHARGE
    Lithium battery charging indicator
21. POWER
    Power indicator

Interface Description

When using the ESP32-S3-Touch-LCD-7B, it's important to understand the hardware connections for different peripherals.

LCD Interface: Connector for the LCD cable (click to expand)

ESP32-S3	LCD	Description
GPIO0	G3	Green data bit 3
GPIO1	R3	Red data bit 3
GPIO2	R4	Red data bit 4
GPIO3	VSYNC	Vertical sync signal
GPIO5	DE	Data enable signal
GPIO7	PCLK	Pixel clock signal
GPIO10	B7	Blue data bit 7
GPIO14	B3	Blue data bit 3
GPIO17	B6	Blue data bit 6
GPIO18	B5	Blue data bit 5
GPIO21	G7	Green data bit 7
GPIO38	B4	Blue data bit 4
GPIO39	G2	Green data bit 2
GPIO40	R7	Red data bit 7
GPIO41	R6	Red data bit 6
GPIO42	R5	Red data bit 5
GPIO45	G4	Green data bit 4
GPIO46	HSYNC	Horizontal sync signal
GPIO47	G6	Green data bit 6
GPIO48	G5	Green data bit 5
IO EXTENSION	LCD	-
EXIO2	DISP	Backlight enable pin
EXIO6	LCD_VDD_EN	VCOM voltage enable pin

Touch Screen Interface: Connector for the touch panel cable (click to expand)

ESP32-S3	Touch	Description
GPIO4	TP_IRQ	Touch interrupt pin
GPIO8	TP_SDA	Touch data pin (I2C)
GPIO9	TP_SCL	Touch clock pin (I2C)
IO EXTENSION	Touch	-
EXIO1	TP_RST	Touch reset pin

USB Interface: Used for power supply and flashing (click to expand)

ESP32-S3	USB	Description
GPIO19	USB_DN	Data line D-
GPIO20	USB_DP	Data line D+
IO EXTENSION	USB	-
EXIO5	USB_SEL	Pull low to set USB mode, otherwise CAN mode

TF Card Interface: Connector for the TF card (click to expand)

ESP32-S3	TF	Description
GPIO11	MOSI	TF card input pin
GPIO12	SCK	TF card clock pin
GPIO13	MISO	TF card output pin
IO EXTENSION	TF	-
EXIO4	SD_CS	TF card chip select, active low

RS485 Interface: Onboard RS485 interface for direct device communication; transmission/reception mode is switched automatically (click to expand)

ESP32-S3	RS485	Description
GPIO16	RS485_RXD	Data input
GPIO15	RS485_TXD	Data output

CAN Interface: Enables transmission/reception control, data analysis, acquisition, and monitoring for CAN bus networks (click to expand)

ESP32-S3	CAN	Description
GPIO20	CANTX	Data output
GPIO19	CANRX	Data input
IO EXTENSION	CAN	-
EXIO5	CAN_SEL	Pull high to set CAN mode, otherwise USB mode

I2C Interface: Connects to the I/O expander chip, touch interface, and external interfaces (click to expand)

ESP32-S3 provides multiple hardware I2C channels. Currently, pins GPIO8 (SDA) and GPIO9 (SCL) are used for the I2C bus.

Peripherals such as the I/O expander chip and touch screen are connected via this I2C interface.

ESP32-S3	I2C	Description
GPIO8	SDA	I2C data pin
GPIO9	SCL	I2C clock pin

• PH2.0 Battery Interface: The development board uses the CS8501 high-efficiency charge/discharge management IC to boost the voltage from a single-cell lithium battery to 5V. The default charging current is 580mA. Users can change resistor R45 to modify the charging current. For details, please refer to the ESP32-S3-Touch-LCD-7B Schematic

Dimensions

Without Touch Version

With Touch Version

Specifications

Basic Parameters

Item	Specification
Processor	High-performance Xtensa 32-bit LX7 dual-core processor, up to 240 MHz
Wi-Fi/Bluetooth	Supports 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE), onboard antenna
Flash	16MB Flash
PSRAM	8MB PSRAM
Power Supply	Type-C 5V

Screen Parameters

Item	Specification
Resolution	1024 × 600
Display Color	65K colors
Display Interface	RGB
Display Panel	IPS
Viewing Angle	170°
Screen Brightness	235 cd/m²
Touch Type	Capacitive
Touch Panel	Tempered Glass

Peripheral Interfaces and Others

Item	Specification
Communication Interfaces	CAN, RS485, I2C, USB
Power Consumption	5V 350mA
Operating Temperature	0℃ ~ 65℃
Product Dimensions (L×W)	Without Touch Version: 164×97 (mm); With Touch Version: 192.96×110.76 (mm)