Skip to main content
Social mediaSocial mediaSocial media   Social media   Social mediaSocial media   Social media

"ESP32 GPIO Pinout and Overview: Complete Guide to Pin Functions

ESP32 pinout and functions and details

ESP32 module is an Internet of things wireless module. It is used to control the devices through the internet. It is a remote IoT development board that can be easily programmed and controlled via WIFI or Bluetooth. 
It has a dual-core Tensilica Xtensa LX6 CPU, which provides ample processing power for various tasks. It includes GPIO pins, SPI, I2C, UART, ADC, DAC, and more peripherals. So we can configure  esp32 pins for a wide variety of projects.

                   ESP32 pinout
Figure:ESP32
ESP32 development board used arduino ide to program as well as other environments e.g. micro python, Thoni, Scratch 3.0, etc.
There are several modules that are part of the ESP 32 family.  ESP32 devkit, ESP wroom-32.  It has a flash memory of 520 k bytes with a working frequency of 240kMHZ. WIFI 802.11, Bluetooth 4.2BR and BLE technology.
Input and output pins, i2c pins, digital to analog converter. Wi-fi and Bluetooth to connect with devices wirelessly.

GPIO Pins

The ESP32 has a large number of GPIO pins, typically labeled GPIO0 to GPIO39. The pins can be configured as digital inputs or outputs and used to control LEDs, read switches, or interface with other digital devices.

Analog Pins 

The ESP32 has a built-in ADC (Analog to Digital Converter) with multiple input channels. Typically, GPIO pins can also be configured to function as analog inputs (labeled as ADC1_CHx or ADC2_CHx). This function allows the ESP32 to measure analog voltages from sensors or other analog devices.

Communication Interfaces

SPI (Serial Peripheral Interface)

The ESP32 has built-in hardware support for SPI communication, with dedicated pins for SPI communication (MISO, MOSI, SCK) as well as additional pins for chip select (CS) and data/command selection (DC).

I2C (Inter-Integrated Circuit)

The ESP32 supports I2C communication through dedicated pins (SDA, SCL).
UART (Universal Asynchronous Receiver-Transmitter)
The ESP32 has multiple UART interfaces, each with dedicated pins for transmitting (TX) and receiving (RX) serial data.

PWM (Pulse Width Modulation)

Some GPIO pins on the ESP32 can be configured to output PWM signals, allowing for control of analog devices such as motors, LEDs, or servos.
Touch Pins:
The ESP32 features touch sensor capabilities, with some GPIO pins capable of detecting touch inputs. These pins are often labeled as T0 to T9.
Power Pins:
In addition to the pins mentioned above, the ESP32 also has pins for power supply (VCC, GND), enabling connection to power sources and ground.

Power Supply

There are different power supply ports options available on the ESP32. It has a USB port for power and to program the module. The micro USB port, or C type port is also available according to the requirement.

ESP 32 Boot modes

The ESP32 microcontroller has different boot modes that determine how it boots up and where it loads its firmware from. The main boot modes for the ESP32 are as follows. The strapping pins are typically used to select one of several boot modes.

Normal Boot Mode

ESP32 boots from its internal flash memory in normal mode. The boot sequence typically starts executing code from a predefined address in the flash memory, where the firmware is stored.

Boot from UART Download Mode

UART mode is used for firmware development and updating. When specific GPIO pins are pulled to a certain state during reset, the ESP32 enters UART download mode, where it waits to receive firmware over the UART interface for programming.

Boot from SPI Flash Boot Mode

From SPI Flash mode, the ESP32 boots from an external SPI flash memory connected to the chip. This mode is commonly used when the firmware exceeds the internal flash capacity or when external storage is preferred.

Boot from SD Card Boot Mode

ESP32 modules and development boards can boot from SD cards. In this mode, the ESP32 reads the firmware from an SD card connected to the device during boot-up.

Boot from RAM Boot Mode

RAM boot mode is used for debugging purposes. When the ESP32 is forced into this mode, it loads firmware directly from RAM instead of flash memory. This mode is typically not used in normal operation.

ESP32 Series

ESP32-WROOM Series:

This series includes modules such as ESP32-WROOM-32, containing integrated antennas and commonly used in IoT applications.

ESP32-WROVER Series:

These modules, such as ESP32-WROVER and ESP32-WROVER-B, feature additional PSRAM (Pseudo Static RAM) alongside the standard ESP32 features, providing more memory for demanding applications.

ESP32-PICO Series:

This series includes compact modules such as ESP32-PICO-D4, which integrate the ESP32 chip along with flash memory and other components into a small form factor package, suitable for space-constrained designs.

ESP32-S Series:

These are ultra-small modules designed for wearable devices and other compact IoT applications. An example is the ESP32-SOLO-1 module.

ESP32-C Series:

This series includes modules like ESP32-C3, which is based on the RISC-V architecture instead of the Xtensa architecture used in other ESP32 chips. The ESP32-C3 is designed for ultra-low-power applications.

ESP32 Dev Kits:

These are development boards that typically feature one of the ESP32 modules along with additional components like USB interfaces, voltage regulators, and GPIO headers, making them ideal for prototyping and development.
These are some of the main types of ESP32 chips and modules available. Each type may have different specifications, features, and form factors, catering to a wide range of applications and requirements.
The ESP32 pinout varies depending on the specific module or development board being used.

Comments

Popular posts from this blog

Electronic components list with Images and Symbols

Electronic components function and details Electronic components are used in electronics circuits. These components might be PCB mounted or integrated type, widely used in electronics devices. Digital computers, control devices in industries and household items containing large number of integrated components. It is essential to know how to identify circuit board parts, whether you are an electronic technician or engineer. We made the electronics devices with integrated chips and circuit components. In circuits, electronic components are used. What are active and passive components? Types of electronic components? There are two major types of electronic components . In electronic circuits, there are active and passive components. 1- Active components 2- Passive components Active components These types of components operate with external power supplies.  Passive components Passive components do not require an external power supply. These components energize with circuit signals. Elec

Arduino UNO Pins (Diagram) Learn quickly pins function

Arduino UNO Pinout and Board components detail The Arduino Uno board is an electronic experimental board. Atmega328P is the heart of the Arduino board. This is an open-source platform for creating electronics projects. I will explain the description of the  Arduino UNO Pins  and the board in the post.  Arduino Uno  is a standard board of the company, even though other boards, e.g. micro, Nano, mega, Leonardo, 101. Due and Yen. Arduino also manufactured IoT (Internet of Things), Bluetooth, GSM/3G, Wi-Fi, and motion sensor boards.                                                                        FIG-A Arduino Uno board The Atmega328P Microcontroller is 8bit with 32k byte internal flash memory. To program the main chip, a 16 MHz crystal is part of the board. The Arduino board requires only 5V DC to operate. Arduino Uno pinout detail The Arduino UNO board has 5 analog and 14 digital (PWM) pins. These pins could be GPIO or used for specific signals. Vin Pin We use a Vin pin for 7-12 VD

Arduino sensors and modules list for Projects.

Arduino Sensors for Electronics Projects What is Sensor? A Sensor is a device used as the primary element that measures physical value and converts it into an electrical signal. Also, we can say that the sensor is a transducer. It measures temperature, distance, light, sound, etc. Sensors and actuators are widely used in Arduino projects. These sensors come with a kit or can be purchased separately. Some of them are compatible with Arduino Uno boards and also Raspberry Pi and other electronic modules. There are a lot of types of Arduino sensor kits available in the market. How many types of Arduino Sensors? There are a lot of sensors used in electronics projects , e.g. robotics cars, moving objects, flying drones, IoT(internet of things), sound and light operation, etc. Here is a list of 45 in 1 electronic sensor that comes with an Arduino sensors kit , and the details of their applications. Analog temperature Sensors KY 013 Temperature Sensor KY-013 is an analog temperature sensor

Arduino Kits for beginners in 2024

Arduino Kits for beginners electronics projects Arduino kits are very simple to learn and widely used in electronic projects . You can make your own projects in a few minutes. Making a circuit on a PCB is a hard job, and it requires excellent skills in soldering. Also, it consumes a lot of time. Assembling components is another problem. But electronic portable kits solve the issue. You can gain knowledge from Arduino starter kits on Amazon. It includes project books and different varieties of sensor modules. We directly connect on the breadboard and reconnect in a few steps. Arduino Uno Starter Kit (official) The official starter kit is from the original manufacturer. This is a complete package, including the Arduino Uno kit Manual. This manual has practical images and schematic diagrams to understand well.   The manual covers not only project-making areas; but also information about Arduino IDE software installation on Windows/macOS X and Linux. Every Project/lesson comprises exam

Led Matrix display interface with Arduino uno

8x8 LED matrix display with Arduino and Pins description There are several types of led matrices available in the market. We can differentiate it as per the size and types of connection, e.g. 5x7, 8x8, common anode, and common cathode type. It comes in different single colors and RGB. But in this article, I will discuss 788bs as a common anode red color 8x8 LED matrix display Module. We use it in many electronics displaying items, e.g. electronic clocks. also for moving message displays, displaying games, etc. We use a dot matrix display with an Arduino UNO board directly, sometimes in projects. But for some projects, we use a max7219 chip or 74hc595 for dot matrix driver as required in our projects. led Matrix 8x8 Pinout function detail The led matrix modules are used in various colors, but I specifically describe the red led matrix. It is very easy to interface a 788bs led matrix with an Arduino board as compared to an RGB led display. If we look at a piece of the 8x8 dot mat

555 Timer IC, Pinout and Function details

555 Timer IC Pinout and applications: We widely used 555 timer IC in electronic projects . This chip has multi-function time-based output signals. We can use 555 IC chips with the Arduino or make separate projects. It is available with different brand names, i.e., LM555, NE555, and SE555. But it is originally manufactured by Texas Instruments. The chip is manufactured in different packages, e.g. SOIC, PDIP, VSSOP. For more details, the 555 timer IC datasheet is available at the Texas official site. We use it for time-based operated siren circuits, control motor speed, and operating led flasher circuits. It can produce a lot of functions, e.g., oscillation, Astable. Bistable, Monostable, flip-flop logic, and pulse width modulation. How 555 Timer work ? You can get a lot of solutions from the chip if you want to understand how it works. There are a lot of timer projects and applications, e.g., timer-controlled circuits, sound, LED flashers, and more. 555 Timer IC Pinout The circuit di

Best Electronic Books for beginners in 2024

Electronic books with Kindle editions A wonderful variety of electronic books . Those who have a very basic knowledge of electronic components. These books are very useful. You can understand the basic structure of the electronic components. These are helpful for theory and practical purposes. What is an electronics book and how to read it? T he book is called an electronic or E-book if it is available for online reading. It might be in pdf format and available to download . Getting Started in Electronics Third Edition, Writer - Forrest M Mims III 128 Pages This book starts with the basic concept, from electricity to electronics. It deals with basic tools and items used to start a mini-project. In this book, the semiconductor-type materials and components are described. The book is about semiconductor components and photonic semiconductor components. It provides logic and symbols of logic gates and integrated circuits. Either digital integrated circuits or linear integrated circuits (

Resistor Calculator with Graphical Chart

Resistor Calculator for measuring resistance Resistor calculator is a very useful tool for anyone working on electronic experiments or projects. It is easy to use and has a simple design. To get resistance for Led voltage drop or your circuit resistance, you can use an online calculator or look up a formula. We can use it for voltage drops or led current limiting. Online resistor calculator It is a simple and easy-to-use online resistor calculator instead of using formulas. It comes with different bands e.g.3 band, 4, 5, and 6 bands. The program calculates resistor values. # Get in touch with more interesting topics ……… 1- How to use a led Matrix with Arduino . 2- Arduino books for projects . 3- Best Arduino kits for beginners . Standard Table For Calculating 4 Band Resistors Online Resistor Calculator (4 Band) Graphical Resistor Calculator Graphical Resistor Calculator is a Free Software to easil

Contact Form

Name

Email *

Message *