Two files. Drop mongoose.c and mongoose.h into any C/C++ project and get a full network stack — HTTP, WebSocket, MQTT, TLS, firmware OTA updates, device dashboard — on any microcontroller or desktop OS.

On the market since 2004, used by vast number of open source and commercial products - it even runs on the International Space Station! Features include:

• Cross-platform:
  • works on Linux/UNIX, MacOS, Windows, Android, STM32, NXP, ESP32, Nordic, TI, Microchip, Infineon, Renesas and other chips
  • write code once - and it'll work everywhere
  • ideal for the unification of the network infrastructure code across company
• Built-in protocols: plain TCP/UDP, SNTP, HTTP, MQTT, Websocket, Modbus-TCP, and other
• Asynchronous DNS resolver
• Tiny static and run-time footprint
• Source code is both ISO C and ISO C++ compliant
• Very easy to integrate
• Own TCP/IP stack for bare metal / RTOS, or run on top of any existing one (lwIP, Zephyr, ...)
• Built-in TLS 1.3 ECC stack. Also can use external TLS libraries - mbedTLS, OpenSSL, or other
• Does not depend on any other software to implement networking
• Built-in firmware updates for STM32 H5, STM32 H7, NXP IMXRT, RP2040/2350, ESP32 and more
• Commercial support with proactive security updates; CRA-compliant

Mongoose is ideal for IoT devices, embedded web servers, OTA updates, MQTT telemetry, secure device dashboards, REST APIs on microcontrollers

See https://mongoose.ws/ for complete documentation, videos, case studies, etc.

Mongoose can work on top of any TCP/IP stack that supports BSD sockets API. Platforms supported by the 3rd party TCP/IP stacks: