Keep FROST Signer

Air-gapped threshold signing for ESP32-S3

Flash Firmware

  1. Connect your ESP32-S3 via USB
  2. Click the button below
  3. Select your device's serial port
  4. Wait for flashing to complete

Or flash a custom firmware file:

Requires Chrome or Edge browser. Not supported on iOS.

After Flashing

Use the Keep CLI to interact with your device:

keep frost hardware ping --device <PORT>

Typical ports:
Linux /dev/ttyACM0
macOS /dev/cu.usbmodem*
Windows COM3

To find your port:
Linux ls /dev/ttyACM*
macOS ls /dev/cu.usbmodem*
Windows Device Manager → Ports

GitHub · Hardware: ESP32-S3 with 8MB Flash