Browser firmware installer

RSVP Nano

Flash the reader from Chrome or Edge without installing VS Code, PlatformIO, or command-line tools. Connect the device by USB, click install, and let the browser write it directly to the ESP32-S3.

Install Firmware

The hosted installer tracks the latest official release, including the reader and USB SD-card transfer support.

RSVP Nano firmware Main reader firmware with on-device EPUB conversion and USB SD-card transfer mode. Use Chrome or Edge on desktop with Web Serial support. This page must be opened over HTTPS or localhost.
Flashing replaces the firmware on the connected ESP32-S3. Keep the device plugged in until the installer says it is finished.

Before You Click Install

  1. Use Chrome or Edge on macOS, Windows, Linux, or ChromeOS.
  2. Connect the device with a USB data cable.
  3. If the installer cannot connect, hold BOOT, tap reset or power-cycle, then try again.
  4. After flashing, place books on the SD card under /books.

The browser flasher is powered by ESP Web Tools and Web Serial. iOS Safari and Firefox do not currently support the required browser serial API.

Library Workspace

Bring books into the browser, convert them into .rsvp, and sync the results back into the SD card’s /books folder without leaving this page.

Compatibility Automatic extended-Latin output

Preserves common accented, Baltic, Sami, and other extended-Latin letters while staying friendly to the current firmware.

Selected Folder No /books folder selected
Library Summary 0 converted books ready
Folder Inventory Pick the SD card’s /books folder to scan it

Everything is converted locally in your browser. Pick the SD card’s /books folder if you want one-click import, cleanup, and sync.

Ready to build a library Add files from your computer or pick the SD card’s /books folder to bring supported source books into the workspace.

Converted Books

Each imported source is turned into a reader-ready .rsvp file so you can download it or sync everything back to the selected folder in one step.

    Add a few books and the converted library will appear here.