Arduino GitHub Repositories (2026) · Open Source Tools

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

Tool to check for problems with Arduino projects

High speed USB serial port LED strip driver for HyperHDR using ESP32 or ESP32-S2 devices. Multi-segment & multi-core support.

Self-contained e-ink dashboard firmware for ESP32-S3 (TRMNL 7.5" DIY kit): crypto & forex, Claude Code and Codex usage limits, air quality, mail, weather. No server needed.

E-Ink-Abfahrtsdisplay für MVG/MVV-Haltestellen (Heltec Vision Master E290)

Sming - powerful open source framework simplifying the creation of embedded C++ applications.