OpenWatt
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Firmware flasher

Install OpenWatt firmware on your device directly from your browser.

Select your device
Choose a firmware version
Versions are pulled from the official GitHub releases.
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Flash the firmware
Connect your device, pick a version, and flash it from the browser.
Your browser doesn't support Web Serial. Please use Chrome or Edge.Web Serial is not available on this page.
  • Before you flash
  • Use a data USB cable (not a charge-only one).
  • The flasher puts the device into bootloader mode automatically.
  • If the device doesn't respond: hold the button, press RESET, release.