The ESP32 Practical Guide

This document serves as a practical guide to the ESP32 microcontroller, covering its introduction, installation, and a wide range of project-based learning modules (Hacks).

Introduction to the ESP32

This section introduces the ESP32 microcontroller, its capabilities, and various development boards such as the ESP32-Pico-Board, ESP32-Pico-Discovery-Board, and the ESP32-Wrover-KIT. It also provides information on where to find downloads.

Installation and Setup

Details the installation process for the Arduino Core for ESP32, including necessary preparations, potential updates, and specific instructions for installation on Linux systems.

Hack 1: Input/Output Fundamentals

Explores basic communication with the ESP32, covering GPIO as input and output. It explains the general Arduino program structure, the Arduino development environment, calculating series resistors, and the color code for resistors. I²C support is also discussed.

Hack 2: Temperature Measurement

Focuses on measuring environmental influences using sensors like the DHT11. It introduces Blynk for IoT applications and the associated Blynk app.

Hack 3: Working with Bluetooth

Explains the fundamentals of Bluetooth, its workflow, and Android app development for Bluetooth communication. It covers variable declaration, BLE scanning, loading App Inventor projects, and reacting to brightness changes using an LDR (Light Dependent Resistor).

Hack 4: Fetching Weather Data

Introduces OpenWeatherMap and the JSON data format for retrieving weather information. It details the construction of an electronic weather station, including servo control with external power supply.

Hack 5: Port Expansion and Roulette Game

Covers IO expansion using the MCP23017 port expander. It includes the development of a roulette game and how the MCP23017 reads data.

Hack 6: Timer Fundamentals

Discusses timer basics and generating interruptions through programming.

Hack 7: External Interrupts

Explains how to handle interruptions from external sources and includes a section on dealing with unexpected behavior.

Hack 8: Reaction Game

Details the creation of a reaction game to test user reflexes, outlining the objective and implementation.

Hack 9: Pulse Width Modulation (PWM)

Covers PWM fundamentals for controlling LED brightness and implementing fading effects.

Hack 10: Digital-to-Analog Conversion

Explains how to convert bits into voltage using a resistor ladder (R2R) and details the circuit setup.

Hack 11: Generating Sounds

Focuses on creating sounds, including the implementation of a siren.

Hack 12: Keypad Input

Guides through building a keypad for input, including preparations and creating a small musical instrument using it.

Hack 13: Motors and Touch Sensors

Explores adding movement with motors and touch sensors. It covers transistors, diodes, H-bridges, and the L293DNE motor driver for controlling motor speed.

Hack 14: The ESPTrak - Part 1

Details the construction of a robot vehicle, including the membrane keypad, chassis, external power supply, and board integration.

Hack 15: The ESPTrak - Part 2

Focuses on the programming of the ESPTrak robot, covering header files, class files, the main file, and programming sequences.

Hack 16: Web Server

Guides on creating a web server and developing a web frontend for controlling ESP32 projects.

Hack 17: Web Server Controls Relays

Explains how a web server can be used to control relays and secure the web frontend.

Hack 18: External Web Server Access

Covers accessing the web server from anywhere on the network.

Hack 19: MQTT Fundamentals

Introduces the MQTT protocol, its installation on Linux and Arduino, and its role in IoT communication.

Hack 20: MQTT in Practice

Demonstrates practical MQTT applications, including sending sensor readings and working with multiple temperature sensors.

Hack 21: MQTT and Databases

Explains how to store data using MQTT, covering the installation of paho-MQTT and SQLite, basic database operations (creating tables, adding/displaying/deleting data), and using a Python script to save data.

Hack 22: Hall Sensor

Discusses the Hall effect and its application with Hall sensors.

Hack 23: Stepper Motor

Details stepper motors and their control using the A4988 motor driver, including pin descriptions.

Hack 24: Drawing Machine

Explores creative applications by building a drawing machine.

Hack 25: Seven-Segment Display

Covers controlling individual segments of a seven-segment display and improving ESP32 code for its use.

Hack 26: MicroPython Programming Language

Provides an introduction to the MicroPython programming language, including testing MicroPython, blinking an LED, using the uPyCraft IDE, reading a button, and executing scripts after boot.

Hack 27: Ultrasonic Sensor

Explains how to measure distances using the HC-SR04 ultrasonic sensor, including voltage division for 5V to 3.3V conversion and interaction with Processing.

Hack 28: Deep Sleep

Covers ESP32's deep sleep functionality, including code for deep sleep, waking up the device, saving data, and waking up via external signals (EXT0 and EXT1).

	ESP32 Development Board Setup Guide for Arduino IDE A comprehensive guide to setting up the ESP32 development environment within the Arduino IDE. Learn how to add board manager URLs, install ESP32 support, select the correct board and port, and enter download mode for ESP32-C3 modules.
	2.8inch ESP32-32E Display Module User Manual User manual for the 2.8-inch ESP32-32E Display Module, covering resource description, software and hardware instructions, and precautions for use. Details include ESP32-WROOM-32E module, ILI9341 LCD controller, SPI communication, USB-to-serial conversion, and various circuit diagrams.
	ESP32 Development with MSP4030/MSP4031 Display Module: Demo Instructions A comprehensive guide to using the MSP4030 and MSP4031 display modules with ESP32 development boards, covering setup, pin connections, sample programs, library configuration, and compilation.
	Smart Home Automation System using ESP32, Blynk, and IR Remote Research paper detailing the design and implementation of an IoT-based smart home automation system using ESP32, Blynk, IR remote, and manual controls for efficient appliance management.
	Programación ESP32 con Ejemplos: Guía Práctica Aprenda a programar la tarjeta ESP32 utilizando el entorno Arduino IDE. Este documento cubre la configuración de herramientas, escaneo de redes WiFi y control de LED por Bluetooth con ejemplos prácticos.
	Smart Home Automation with Blynk and ESP32: WiFi and Manual Control Guide Learn to build a smart home automation system using an ESP32 microcontroller and the Blynk app for WiFi control. This guide covers integrating manual switches for backup, monitoring relay status, and setting up the project step-by-step.
	ESP32-WT32-ETH01 Embedded Serial to Ethernet Module Specification This document provides detailed specifications for the ESP32-WT32-ETH01, an embedded serial port to Ethernet module based on the ESP32 series. It covers features, hardware specifications, pin descriptions, power characteristics, usage instructions, and various functions including TCP/IP, UDP, AT commands, Bluetooth, and Wi-Fi.
	E32R32P & E32N32P 3.2-inch IPS ESP32-32E Display Module User Manual This user manual provides a comprehensive guide to the E32R32P and E32N32P 3.2-inch IPS ESP32-32E Display Modules. It covers resource descriptions, software and hardware instructions, detailed explanations of schematic diagrams, and precautions for use. The manual details the module's components, including the LCD screen, resistive touch screen, ESP32-WROOM-32E module, various interface circuits, and power management.