====== Installation ======
===== Get ESP-IDF =====
To build applications for the ESP32, you need the ESP-IDF software libraries provided by Espressif. Consult [[https://docs.espressif.com/projects/esp-idf/en/stable/versions.html|ESP-IDF Versions]] for information about which ESP-IDF version to use in a given situation. To get ESP-IDF, navigate to your installation directory and clone the repository with git clone, following instructions:

  cd ~/development/esp32
  
  # This will clone the Master Branch
  git clone --recursive https://github.com/espressif/esp-idf.git
  
  # This will clone a stable release. Assuming that 4.0 is the latest stable release
  git clone -b v4.0 --recursive https://github.com/espressif/esp-idf.git
  
ESP-IDF will be downloaded into ~/esp/development/esp32/esp-idf.

===== 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. 
The scripts below installs the 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, set 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.
If changing the IDF_TOOLS_PATH, make sure it is set to the same value every time the Install script (install.sh) and an Export script (export.sh) are executed.

  cd ~/development/esp32/esp-idf
  ./install.sh

===== 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

Note the space between the leading dot and the path!

You can also automate this step, making ESP-IDF tools available in every terminal, by adding this line to your .profile or .bash_profile script.