Flash or update ESP32 firmware directly from your browser — no software installation required.
⚠️ Unsupported Browser — Web Serial API is required.
Please use Google Chrome or Microsoft Edge (version 89+) on desktop.
1 — Select Firmware
Loading firmware list…
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Drop firmware .bin here or click to browse
Accepts ESP32 binary images (.bin)
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2 — Flash Settings
3 — Connect & Flash
Not connected
Chip—
MAC Address—
Flash Size—
Crystal—
Preparing…0%
Log Output
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How to use:
Hold the BOOT button on the Flextron ECA board while plugging in USB — this enters the bootloader mode.
Select the .bin firmware file above.
Click Connect to Device and choose the serial port from the browser dialog.
Click Flash Firmware and wait for the process to complete.
Unplug and replug (or press Reset) to boot the new firmware.
Requires Chrome or
Edge on Windows, macOS, or Linux desktop.
On Linux you may need to add your user to the dialout group:
sudo usermod -aG dialout $USER