Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP…

U8glib library for monochrome displays, version 2

Simple unit testing for C

Open source ARM Cortex-M microcontroller library

ZSWatch - the Open Source Zephyr™ based Smartwatch, including both HW and FW.

DO NOT CHECK OUT THESE FILES FROM GITHUB UNLESS YOU KNOW WHAT YOU ARE DOING. (See below.)

digital signal processing library for software-defined radios

PortAudio is a cross-platform, open-source C language library for real-time audio input and output.

Lightweight generic ring buffer manager library

Very Tiny Palmtop Vector Network Analyzer

Low-cost LS/FS/HS USB sniffer with Wireshark interface

A simple ring buffer (circular buffer) designed for embedded systems.

STM32 HAL library for GY-521 (MPU6050) with Kalman filter

Open source ECG holter

nRF52/nRF51 Fitness Trackers & Smartwatches Reverse Engineered for use as a Wearable Device Development Platform

Эмулятор домофонных ключей iButton/Cyfral/Metacom

Low-level debug tools for MDIO devices.

A portable, ANSI-C implementation of Pan-Tompkins real-time QRS detection algorithm

An STM32 based datalogger with micro SD card and USB support

The Waveform Database Software Package

Sayma AMC/RTM issue tracker

ecg compressed sensing

Fixed point C implementation of Pan Tompkins QRS detector

HTRC110 125kHZ RFID Reader code for PIC microcontrollers and other C compilers

EP Limited: Open Source ECG Analysis Software Beat Detection and Classification Source Code

EM4095 full-featured driver library for general-purpose MCU and Linux.

A heart monitor application using stm32f103c8 microcontroller and AD8232 integrated signal conditioning block for ECG.

NRF52 BLE ECG PPG example

An I2C master driver for Atmel ATMega microcontrollers