Espressif has a license to distribute wolfSSL royalty-free in binary form on all Espressif MCU products. You can use the binary wolfSSL library on Espressif devices in products, without additional royalty costs. The binary library does not include wolfSSL features for TLS 1.3, FIPS or DTLS 1.2.
Updates to these wolfSSL binary libraries will be available until at least March 2021.
To discuss additional features, additional support and updates, or to obtain a quote for other individual licensing options then please contact licensing@wolfssl.com