Esp Arduino Espressif Documentation

Our Development is fully tracked on this public Roadmap 🎉 For even more information you can join our Monthly Community Meetings 🔔. You can use the Arduino-ESP32 Online Documentation to get all information about this project. Migration guide from version 2.x to 3.x is available here. APIs compatibility with ESP8266 and Arduino-CORE (Arduino.cc) is explained here. Our Development is fully tracked on this public Roadmap 🎉

For even more information you can join our Monthly Community Meetings 🔔. You can use the Arduino-ESP32 Online Documentation to get all information about this project. Migration guide from version 2.x to 3.x is available here. APIs compatibility with ESP8266 and Arduino-CORE (Arduino.cc) is explained here. Welcome to the Arduino ESP32 support documentation! Here you will find important information on how to use the project.

Before continuing, we must be clear that this project is supported by Espressif Systems and the community. Everyone is more than welcome to contribute back to this project. ESP32 is a single 2.4 GHz Wi-Fi-and-Bluetooth SoC (System On a Chip) designed by Espressif Systems. ESP32 is designed for mobile, wearable electronics, and Internet-of-Things (IoT) applications. It features all the state-of-the-art characteristics of low-power chips, including fine-grained clock gating, multiple power modes,and dynamic power scaling. For instance, in a low-power IoT sensor hub application scenario, ESP32 is woken-up periodically and only when a specified condition is detected.

Low-duty cycle is used to minimize the amount of energy that the chip expends. The output of the power amplifier is also adjustable, thus contributing to an optimal trade-off between communication range, data rate and power consumption. Welcome to the Arduino ESP32 support documentation! Here you will find important information on how to use the project. Before continuing, we must be clear that this project is supported by Espressif Systems and the community. Everyone is more than welcome to contribute back to this project.

ESP32 is a single 2.4 GHz Wi-Fi-and-Bluetooth SoC (System On a Chip) designed by Espressif Systems. ESP32 is designed for mobile, wearable electronics, and Internet-of-Things (IoT) applications. It features all the state-of-the-art characteristics of low-power chips, including fine-grained clock gating, multiple power modes,and dynamic power scaling. For instance, in a low-power IoT sensor hub application scenario, ESP32 is woken-up periodically and only when a specified condition is detected. Low-duty cycle is used to minimize the amount of energy that the chip expends. The output of the power amplifier is also adjustable, thus contributing to an optimal trade-off between communication range, data rate and power consumption.

This guide will show how to install the Arduino-ESP32 support. We recommend you install the support using your favorite IDE, but other options are available depending on your operating system. To install Arduino-ESP32 support, you can use one of the following options. This is the way to install Arduino-ESP32 directly from the Arduino IDE. For overview of SoC’s support, take a look on Supported Soc’s table where you can find if the particular chip is under stable or development release. Starting with the Arduino IDE version 1.6.4, Arduino allows installation of third-party platform packages using Boards Manager.

We have packages available for Windows, macOS, and Linux. Here you will find all the relevant information about the project. This documentation is valid for the Arduino Core for ESP32 version 3.3.7 based on ESP-IDF 5.5. This is a work in progress documentation and we will appreciate your help! We are looking for contributors! © Copyright 2016 - 2026, Espressif Systems (Shanghai) Co., Ltd.

ESP-IDF is the development framework for Espressif SoCs supported on Windows, Linux and macOS. See Compatibility Between ESP-IDF Releases and Revisions of Espressif SoCs for the details of the compatibility between ESP-IDF and chip revisions. Espressif SoCs released before 2016 (ESP8266 and ESP8285) are supported by RTOS SDK instead. See https://idf.espressif.com/ for links to detailed instructions on how to set up the ESP-IDF depending on chip you use. Note: Each SoC series and each ESP-IDF release has its own documentation. Please see Section Versions on how to find documentation and how to checkout specific release of ESP-IDF.

I2C (Inter-Integrated Circuit) / TWI (Two-wire Interface) is a widely used serial communication to connect devices in a short distance. This is one of the most common peripherals used to connect sensors, EEPROMs, RTC, ADC, DAC, displays, OLED, and many other devices and microcontrollers. This serial communication is considered as a low-speed bus, and multiple devices can be connected on the same two-wires bus, each with a unique 7-bits address (up to 128 devices). These two wires are called SDA (serial data line) and SCL (serial clock line). The SDA and SCL lines require pull-up resistors. See the device datasheet for more details about the resistors’ values and the operating voltage.

The I2C can be used in two different modes: In this mode, the ESP32 generates the clock signal and initiates the communication with the slave device.

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