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Image: reddit.com · Pocket file server, hosted on Esp32-S3.

Worked Proof shown

A pocket SD card file server on an ESP32-S3 watch

A watch firmware feature that serves a web page for SD card file transfers, first written in the Arduino IDE and ported to ESP-IDF by Claude.

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Credits

  • Reddit poster NotFrankGraves Source ↗

Earliest dated source: 11 Jun 2026

The full story

Part of the maker's own firmware for a Waveshare ESP32-S3 Touch AMOLED 2.06 watch: a pocket file server that joins the Wi-Fi network and hosts a web page giving access to the SD card for moving files between devices.

The maker, still new to this, wrote it in the Arduino IDE and had Claude port it to ESP-IDF in C++, with Claude "doing the heavy work".

How it was done

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Sources

From a short post by the maker, so the details are as they tell them.

  • Reddit: Pocket file server, hosted on Esp32-S3.Forum threadreddit.com
    Reddit poster: NotFrankGravesPosted 11 Jun 2026

    The maker's post on r/esp32.

    If it disappears: archived copy of Reddit: Pocket file server, hosted on Esp32-S3. (opens in a new tab)

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