Freenove ESP32-S3 User Manual

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Chapter 6 TCP/IP
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if (Serial.available() > 0) {
delay(20);
String line = Serial.readString();
client.print(line);
}
If the server is disconnected, turn off WiFi of ESP32-S3.
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if (client.connected () == false) {
client.stop();
WiFi.disconnect();
}
Reference
Class Client
Every time when using Client, you need to include header file "WiFi.h."
connect(ip, port, timeout)/connect(*host, port, timeout): establish a TCP connection.
ip, *host：ip address of target server
port: port number of target server
timeout: connection timeout
connected(): judge whether client is connecting. If return value is 1, then connect successfully; If return
value is 0, then fail to connect.
stop(): stop tcp connection
print(): send data to server connecting to client
available(): return to the number of bytes readable in receive buffer, if no, return to 0 or -1.
read(): read one byte of data in receive buffer
readString(): read string in receive buffer

Freenove ESP32-S3 Specifications

General

Microcontroller	ESP32-S3
Clock Speed	240 MHz
SRAM	512 KB
Flash Memory	8MB
PSRAM	8 MB
Bluetooth	Bluetooth 5, Bluetooth Mesh
Operating Voltage	3.3 V
ADC Resolution	12-bit
DAC Resolution	8-bit
CPU	Dual-core Xtensa® 32-bit LX7
Wi-Fi	802.11 b/g/n
USB	USB Type-C

Summary

Important Information

Getting Started

Instructions for initial setup and reading the 'Start Here.pdf' document.

Get Support and Offer Input

Information on obtaining technical support and providing feedback to Freenove.

Safety and Precautions

Essential safety guidelines and warnings for using the product.

About Freenove

Copyright

Preface

ESP32-S3 WROOM Overview

Introduction to the ESP32-S3 microcontroller unit and its features.

CH343 Driver Installation

Guide to installing the CH343 driver for Windows and macOS.

Programming Software Setup

Instructions for installing and setting up the Arduino IDE for programming.

Environment Configuration

Steps to configure the Arduino IDE for ESP32-S3 board support.

Notes for GPIO

Details on strapping pins and their configurations for ESP32-S3.

Chapter 1 LED

Project 1.1 Blink

A project demonstrating how to control an LED to blink using ESP32-S3.

Chapter 2 Serial Communication

Project 2.1 Serial Print

Sending data from ESP32-S3 to a computer via serial communication.

Project 2.2 Serial Read and Write

Receiving data from a computer and sending it to ESP32-S3 via serial.

Chapter 3 Bluetooth

Project 3.1 BLE Data Passthrough

Demonstrates data transmission using Bluetooth Low Energy between ESP32-S3 and mobile phones.

Chapter 4 Read and Write the SDcard

Project 4.1 SDMMC Test

Using ESP32-S3 to read and write data to an SD card via SDMMC interface.

Format SD Card

Guide for formatting an SD card on Windows and macOS systems.

Chapter 5 WiFi Working Modes

Project 5.1 Station Mode

Configuring ESP32-S3 to connect to a WiFi router as a client.

Project 5.2 AP Mode

Setting up ESP32-S3 to act as a WiFi Access Point (hotspot).

Project 5.3 AP+Station Mode

Enabling ESP32-S3 to operate as both a WiFi client and Access Point simultaneously.

Chapter 6 TCP/IP

Project 6.1 As Client

Using ESP32-S3 as a TCP client to connect to a server on the same LAN.

Project 6.2 As Server

Using ESP32-S3 as a TCP server to accept client connections.

Chapter 7 Camera Web Server

Project 7.1 Camera Web Server

Accessing ESP32-S3 camera stream via a web browser.

Project 7.2 Video Web Server

Viewing real-time video data from ESP32-S3 camera via web pages.

Project 7.3 Camera and SDcard

Capturing photos with ESP32-S3 camera and saving them to an SD card.

Chapter 8 Camera Tcp Server

Project 8.1 Camera Tcp Server

Displaying ESP32-S3 camera video data on a mobile phone.

What's next?

End of the Tutorial

Concluding remarks and contact information for further assistance.