Show HN: Esp32sim – Run ESP32 firmware in the browser

Category: devtools

Tags: emulator, esp32, webassembly, rust, embedded

Score: 8.0/10 (Innovation: 8, Technical: 9, Documentation: 8, Utility: 7)

esp32sim is a Rust-based ESP32 emulator that runs real, unmodified firmware in the browser or natively, supporting multiple chips and peripherals like WiFi, displays, and touch. It's technically impressive for its full boot chain emulation, JIT speed, and hardware lock-step verification.

Target audience: embedded developers, IoT engineers, firmware testers, educators

Repository: https://github.com/mikroverk/esp32sim · Rust · MIT · 598 stars

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