Firmware GitHub Repositories (2026) · Open Source Tools

Rinkhals custom firmware for Anycubic Kobra 3D printers

🟢 Ultra-fast, tiny C/C++ tracing and logging, even in interrupts ⚡, with printf-like syntax and real-time PC visualization 💻

Tasmota Web Installer and firmware repository

Alternative firmware for ESP8266 with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at

Tasmota unofficial firmware builds. Install via Tasmota WebInstaller

Open-source circuit and MCU firmware simulator for mixed-signal co-simulation, deterministic CI, and MCP workflows. STM32, ESP32, RP2040.

This is project SuperCAN. An open source USB to CAN-FD protocol.

Sandbox with hardware IO and hot reload for ESP32 devices

Develop and debug FoloToy AI Passport firmware without the device: an ESP32-C3 emulator that runs unmodified ESP-IDF images in the browser (WebAssembly) or on macOS and Windows, with a CLI and an MCP server for AI agents.

a visual toolkit for exploring and editing firmware images, running on web platforms