Freenove ESP32-S3 User Manual

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Chapter 3 Bluetooth
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Chapter 3 Bluetooth
This chapter mainly introduces how to make simple data transmission through Bluetooth of ESP32-S3
WROOM and mobile phones.
Project 3.1 Bluetooth Low Energy Data Passthrough
Component List
ESP32-S3 WROOM x1
USB cable x1
Component knowledge
ESP32-S3's integrated Bluetooth function Bluetooth is a short-distance communication system, which can be
divided into two types, namely Bluetooth Low Energy(BLE) and Classic Bluetooth. There are two modes for
simple data transmission: master mode and slave mode.
Master mode
In this mode, works are done in the master device and it can connect with a slave device. And we can search
and select slave devices nearby to connect with. When a device initiates connection request in master mode,
it requires information of the other Bluetooth devices including their address and pairing passkey. After
finishing pairing, it can connect with them directly.
Slave mode
The Bluetooth module in slave mode can only accept connection request from a host computer, but cannot
initiate a connection request. After connecting with a host device, it can send data to or receive from the host
device.
Bluetooth devices can make data interaction with each other, as one is in master mode and the other in slave
mode. When they are making data interaction, the Bluetooth device in master mode searches and selects
devices nearby to connect to. When establishing connection, they can exchange data. When mobile phones
exchange data with ESP32-S3, they are usually in master mode and ESP32-S3 in slave mode.

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.