# Standard Toolchain Setup for Linux and macOS (Legacy)

[中文]

Warning

This document describes the legacy installation method of ESP-IDF on Linux and macOS, which was the default before v6.0.

## Installation Step by Step

This is a detailed roadmap to walk you through the installation process.

### Setting up Development Environment

These are the steps for setting up the ESP-IDF for your ESP32-S2.

- Step 1. Install Prerequisites

- Step 2. Get ESP-IDF

- Step 3. Set up the Tools

- Step 4. Set up the Environment Variables

## Step 1. Install Prerequisites

In order to use ESP-IDF with the ESP32-S2, you need to install some software packages based on your Operating System. This setup guide helps you on getting everything installed on Linux and macOS based systems.

### For Linux Users

To compile using ESP-IDF, you need to get the following packages. The command to run depends on which distribution of Linux you are using:

- Ubuntu and Debian:

      sudo apt-get install git wget flex bison gperf python3 python3-pip python3-venv cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0

- CentOS 7 & 8:

      sudo yum -y update && sudo yum install git wget flex bison gperf python3 cmake ninja-build ccache dfu-util libusbx

CentOS 7 is still supported but CentOS version 8 is recommended for a better user experience.

- Arch:

      sudo pacman -S --needed gcc git make flex bison gperf python cmake ninja ccache dfu-util libusb python-pip

Note

- CMake version 3.22 or newer is required for use with ESP-IDF. Run "tools/idf_tools.py install cmake" to install a suitable version if your OS versions does not have one.

- If you do not see your Linux distribution in the above list then please check its documentation to find out which command to use for package installation.

### For macOS Users

ESP-IDF uses the version of Python installed by default on macOS.

- Install CMake & Ninja build:

  - If you have HomeBrew, you can run:

        brew install cmake ninja dfu-util

  - If you have MacPorts, you can run:

        sudo port install cmake ninja dfu-util

  - Otherwise, consult the CMake and Ninja home pages for macOS installation downloads.

- It is strongly recommended to also install ccache for faster builds. If you have HomeBrew, this can be done via `brew install ccache` or `sudo port install ccache` on MacPorts.

Note

If an error like this is shown during any step:

    xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

Then you need to install the XCode command line tools to continue. You can install these by running `xcode-select --install`.

### Apple M1 Users

If you use Apple M1 platform and see an error like this:

    WARNING: directory for tool xtensa-esp32-elf version esp-2021r2-patch3-8.4.0 is present, but tool was not found
    ERROR: tool xtensa-esp32-elf has no installed versions. Please run 'install.sh' to install it.

or:

    zsh: bad CPU type in executable: ~/.espressif/tools/xtensa-esp32-elf/esp-2021r2-patch3-8.4.0/xtensa-esp32-elf/bin/xtensa-esp32-elf-gcc

Then you need to install Apple Rosetta 2 by running

    /usr/sbin/softwareupdate --install-rosetta --agree-to-license

### Installing Python 3

Ensure that you have Python 3.10 or newer installed, as this is the minimum version supported by ESP-IDF.

Note that most of the recent versions of macOS include Python 3.9 (or older) by default, which is no longer supported. You will need to install Python 3.10 or later.

To install supported Python 3 on macOS:

- With HomeBrew, run:

      brew install python3

- With MacPorts, run:

      sudo port install python313

Note

During installation, the install script will check for supported Python versions on your system and select the oldest version that meets the minimum requirement.

## Step 2. Get ESP-IDF

To build applications for the ESP32-S2, you need the software libraries provided by Espressif in ESP-IDF repository.

To get ESP-IDF, navigate to your installation directory and clone the repository with `git clone`, following instructions below specific to your operating system.

Open Terminal, and run the following commands:

    mkdir -p ~/esp
    cd ~/esp
    git clone -b v6.0 --recursive https://github.com/espressif/esp-idf.git

ESP-IDF is downloaded into `~/esp/esp-idf`.

Consult ESP-IDF Versions for information about which ESP-IDF version to use in a given situation.

## Step 3. Set up the Tools

Aside from the ESP-IDF, you also need to install the tools used by ESP-IDF, such as the compiler, debugger, Python packages, etc, for projects supporting ESP32-S2.

    cd ~/esp/esp-idf
    ./install.sh esp32s2

or with Fish shell

    cd ~/esp/esp-idf
    ./install.fish esp32s2

The above commands install tools for ESP32-S2 only. If you intend to develop projects for more chip targets then you should list all of them and run for example:

    cd ~/esp/esp-idf
    ./install.sh esp32,esp32s2

or with Fish shell

    cd ~/esp/esp-idf
    ./install.fish esp32,esp32s2

In order to install tools for all supported targets please run the following command:

    cd ~/esp/esp-idf
    ./install.sh all

or with Fish shell

    cd ~/esp/esp-idf
    ./install.fish all

Note

For macOS users, if an error like this is shown during any step:

    <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:xxx)

You may run `Install Certificates.command` in the Python folder of your computer to install certificates. For details, see Download Error While Installing ESP-IDF Tools.

### Alternative File Downloads

The tools installer downloads a number of files attached to GitHub Releases. If accessing GitHub is slow then it is possible to set an environment variable to prefer Espressif's download server for GitHub asset downloads.

Note

This setting only controls individual tools downloaded from GitHub releases, it does not change the URLs used to access any Git repositories.

To prefer the Espressif download server when installing tools, use the following sequence of commands when running `install.sh`:

    cd ~/esp/esp-idf
    export IDF_GITHUB_ASSETS="dl.espressif.com/github_assets"
    ./install.sh

Note

For users in China, we recommend using our download server located in China for faster download speed.

    cd ~/esp/esp-idf
    export IDF_GITHUB_ASSETS="dl.espressif.cn/github_assets"
    ./install.sh

### Customizing the Tools Installation Path

The scripts introduced in this step install compilation tools required by ESP-IDF inside the user home directory: `$HOME/.espressif` on Linux. If you wish to install the tools into a different directory, export the environment variable IDF_TOOLS_PATH before running the installation scripts. Make sure that your user account has sufficient permissions to read and write this path.

    export IDF_TOOLS_PATH="$HOME/required_idf_tools_path"
    ./install.sh

    . ./export.sh

If changing the `IDF_TOOLS_PATH`, make sure it is exported in the environment before running any ESP-IDF tools or scripts.

Note

Using `IDF_TOOLS_PATH` in variable assignment, e.g., `IDF_TOOLS_PATH="$HOME/required_idf_tools_path" ./install.sh`, without prior exporting, will not work in most shells because the variable assignment will not affect the current execution environment, even if it's exported/changed in the sourced script.

## Step 4. Set up the Environment Variables

The installed tools are not yet added to the PATH environment variable. To make the tools usable from the command line, some environment variables must be set. ESP-IDF provides another script which does that.

In the terminal where you are going to use ESP-IDF, run:

    . $HOME/esp/esp-idf/export.sh

or for fish (supported only since fish version 3.0.0):

    . $HOME/esp/esp-idf/export.fish

Note the space between the leading dot and the path!

If you plan to use esp-idf frequently, you can create an alias for executing `export.sh`:

1. Copy and paste the following command to your shell's profile (`.profile`, `.bashrc`, `.zprofile`, etc.)

       alias get_idf='. $HOME/esp/esp-idf/export.sh'

2. Refresh the configuration by restarting the terminal session or by running `source [path to profile]`, for example, `source ~/.bashrc`.

Now you can run `get_idf` to set up or refresh the esp-idf environment in any terminal session.

Technically, you can add `export.sh` to your shell's profile directly; however, it is not recommended. Doing so activates IDF virtual environment in every terminal session (including those where IDF is not needed), defeating the purpose of the virtual environment and likely affecting other software.

## Updating ESP-IDF and Python Packages in the ESP-IDF Environment

It is recommended to update ESP-IDF from time to time, as newer versions fix bugs and/or provide new features. Please note that each ESP-IDF major and minor release version has an associated support period, and when one release branch is approaching end of life (EOL), all users are encouraged to upgrade their projects to more recent ESP-IDF releases, to find out more about support periods, see ESP-IDF Versions.

The simplest way to do the update is to delete the existing `esp-idf` folder and clone it again, as if performing the initial installation described in Step 2. Get ESP-IDF.

Another solution is to update only what has changed. For specific instructions, please visit Updating ESP-IDF page.

After updating ESP-IDF, execute the install script again (`./install.sh` in your `$IDF_PATH`), in case the new ESP-IDF version requires different versions of tools. See instructions at Step 3. Set up the Tools.

Once all the new tools are installed, enter the ESP-IDF environment using the export script as described in Step 4. Set up the Environment Variables.

### Updating Python Packages in the ESP-IDF Environment Without Updating ESP-IDF

Some features in ESP-IDF are not included directly in the ESP-IDF repository. Instead, they are provided by Python packages such as `esp-idf-monitor` or `esptool`, which are installed in the ESP-IDF environment by the install script. These packages can be updated independently of ESP-IDF. To update them, simply re-run the install script (`./install.sh` in your `$IDF_PATH`). If the ESP-IDF environment already exists, the script will update all Python packages in it to the latest versions compatible with the current ESP-IDF version — without updating the ESP-IDF itself.

Note

If you are an advanced user and want more control over the update process, you can also check idf_tools.py Script and its `install-python-env` command, which is used by the install script and handles the creation or update of the ESP-IDF environment.

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