ESP-IDF v4.0 Release Candidate has been released

[ESP_Angus]

Documentation for release v4.0-rc is available at https://docs.espressif.com/projects/esp-idf/en/v4.0-rc/

ESP-IDF v4.0-rc is a release candidate prerelease of ESP-IDF v4.0, which is a major update for ESP-IDF v3.x.

ESP-IDF v4.0-rc is mostly compatible with apps written for ESP-IDF v3.x, but there are some breaking changes (please consult the release page on GitHub) and removal of deprecated functionality which will require code changes when updating projects

The latest stable release of ESP-IDF is v3.3.1 at time of writing.

For full details, new features, release notes, known issues, installation instructions, etc then please see the release page on GitHub:
https://github.com/espressif/esp-idf/releases/v4.0-rc