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Show HN: Esp32sim – Run ESP32 firmware in the browser

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Hacker News | Oct 17, 2026 | joakimeriksson

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ROM through the real bootloader into FreeRTOS. WiFi works too: --wifi attaches the same virtual access point as on the S3 (see WiFi below). Result so far: the ROM reset path (8000 steps) and 3000+ steps of the IDF 5. 5 bootloader . /target/release/esp32sim --boot rom --bootloader … --ptable … --app … --web 8766 --web PORT runs the emulator in real time and serves web/run. html: the 14‑port board WebAudio.

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