Flash a Signetline token

Turn a blank ESP32-C3 or ESP32-S3 board into a Signetline token, right from this browser. No installs, no command line — the same firmware the hardware spec ships.

Needs Chrome, Edge, or Opera over a USB cable — these are the only browsers with Web Serial. This only writes firmware; an identity already provisioned on the device lives in a separate area and isn't touched.
ESP32-C3 Super Mini board

ESP32-C3 Super Mini

Flash here

Flashable straight from this page over Web Serial.

ESP32-S3 DevKit board

ESP32-S3 DevKit

Flash here

Flashable straight from this page over Web Serial.

Signetline custom dongle, STM32L422KBT6-based

Signetline dongle

Preflashed

Our own STM32-based board. Comes preflashed — plug it in and register, no flashing needed.

Plug the board in, then connect it to this browser.

If the browser can't reach the bootloader on its own, hold the board's BOOT button while clicking Connect, and release once detection starts.

Detecting board…
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Erase stored identity & keys
A normal flash only replaces the firmware and leaves an existing identity intact. Checking this wipes the whole chip first, including the private key and message counter stored in its filesystem — the device will generate a brand-new identity on first boot. There's no undo: any account this device was registered to won't recognize it afterward.
Flashing…
Bootloader
0%
Partition table
0%
Application
0%

    


    

      

      
Flashed. Unplug the board and plug it back in, then register your new token.

      Go to Signetline
      
    


    

      
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