Esp32sim
Esp32sim is an ESP32 emulator written in Rust.
Esp32sim launched on 17 October 2026. It ranked #6 on Daily Launch on 18 October 2026 with a Launch Score of 77, from 189 points on Show HN. It was new in the ranking that day.
What is Esp32sim?
esp32sim is an ESP32 emulator written in Rust. It runs real ESP32 firmware on your computer or in a browser tab, without the hardware. It boots the chip's own mask ROM, the real second-stage bootloader and your unmodified application. It also models the board around the chip: displays, touch, LEDs, buttons, audio, camera and WiFi.
From its README on GitHub
Esp32sim is a launch on Show HN. It is written in Rust and released under the MIT license.
In its own words
Run ESP32 firmware in the browser
From its Show HN post
Launch timeline
Launch Score, last 7 days
Ranked on one day so far: 77 of 100 on 18 October.