ASIO port


Asio is a cross-platform C++ library, see It provides a consistent asynchronous model using a modern C++ approach.

ASIO documentation

Please refer to the original asio documentation at Asio also comes with a number of examples which could be find under Documentation/Examples on that web site.

Supported features

ESP platform port currently supports only network asynchronous socket operations; does not support serial port. SSL/TLS support is disabled by default and could be enabled in component configuration menu by choosing TLS library from

  • mbedTLS with OpenSSL translation layer (default option)

  • wolfSSL

SSL support is very basic at this stage and it does include following features:

  • Verification callbacks

  • DH property files

  • Certificates/private keys file APIs

Internal asio settings for ESP include

  • EXCEPTIONS are enabled in ASIO if enabled in menuconfig

  • TYPEID is enabled in ASIO if enabled in menuconfig

Application Example

ESP examples are based on standard asio protocols/asio:

Please refer to the specific example for details