License: Custom

Libwebsockets and included programs are provided under the terms of the
MIT license, with the exception that some sources are under
a similar permissive license like BSD, or are explicitly CC0 / public
domain to remove any obstacles from basing differently-licensed code on
them.
Please refer to the LWS LICENSE for more details.

Espressif port files are licensed under Apache-2.0 license.
Espressif examples and tests are distributed under Unlicense/CC0.

Links

Download license: Custom