A little fail-safe filesystem designed for microcontrollers

Protocol Buffers with small code size

Contiki-NG: The OS for Next Generation IoT Devices

QP/C Real-Time Event Framework/RTOS implements event-driven Active Object (Actor) model combined with Hierarchical State Machines. Specifically designed for embedded systems (e.g., ARM Cortex-M MCUs).

A testing micro framework for creating function test doubles

A CoAP (RFC 7252) implementation in C

Concise Binary Object Representation (CBOR) Library

Eclipse Wakaama is a C implementation of the Open Mobile Alliance's LightWeight M2M protocol (LwM2M).

CBOR protocol implementation for C

Comprehensive, powerful, commercial-quality CBOR encoder/ decoder that is still suited for small devices.

Low footprint C/C++ CBOR library and Python tool providing code generation from CDDL descriptions.

An implementation of a CoAP client, a CoAP server and a HTTP/CoAP proxy with full DTLS support.

To contribute code to the project, please visit

Commercial quality COSE_Sign1 implementation in C for constrained environment. Works with MbtedTLS and OpenSSL Crypto.

Constrained node COSE library

Encodes and decodes CWT, EAT and similar format tokens. It supports COSE format signing and verification as well as the UCCS unsigned format.