Firmware Web Flasher

The ESP32S3 needs to run BLESPloit firmware. If you have Android phone, probably the easiest is flashing using the Android application.

This flasher allows you to flash the ESP32-S3 device over Web Serial. Chrome/Chromium-based(Brave, Opera, …) or Edge browsers, desktop only.

Connect your device in Bootloader mode, and after successful flash reset it to normal operation.

Standard releases

Step 1 — Select your hardware

Step 2 — Select image type

Merged (first flash / full overwrite, offset 0x0) App only (upgrade, keeps settings, offset 0x10000)

Step 3 — Select version Show pre-release builds

Step 4 — Flash

Grant access to "USB JTAG/serial debug unit" port (if you see "Espressif CDC Device" you need to reboot to bootloader mode)

Custom (expert)

Download (or compile) a .bin file and flash it yourself. Check the GitHub Actions artifacts that are automatically built on every push Open GitHub Actions runs →

Image type

Merged (offset 0x0, full overwrite) App only (offset 0x10000)

Select unzipped .bin file