ESP-IDF v4.0.1 has been released

[ESP_Alvin]

Documentation for release v4.0.1 is available at https://docs.espressif.com/projects/esp-idf/en/v4.0.1/

ESP-IDF v4.0.1 is a bugfix update for ESP-IDF v4.0. v4.0.1 is the latest stable release of ESP-IDF at time of writing.

ESP-IDF v4.0.x will be supported until October 2021, according to the ESP-IDF Support Policy. The current Long Term Support release is v3.3.2, v3.3.x will be supported until March 2022.

For full details about release notes, installation instructions, etc then please see the release page on GitHub:
https://github.com/espressif/esp-idf/releases/v4.0.1