OpenGP5 Web Flasher

Web flasher

Put OpenGP5, or Valeton's own firmware, on your GP-5 over USB. Nothing to install.

Alpha — only flash if you are comfortable with the possibility of bricking your pedal.

1Connect the pedal

Plug the pedal in with USB, then connect. The browser will ask to allow MIDI access.

2Choose firmware

Upload your own: drop a firmware file here (.bin: one you built, another OpenGP5 firmware, or Valeton's), or choose one

3Flash

I understand the risk. I'll keep the pedal connected and powered, and this tab open, until it's done (about 40 seconds for OpenGP5, a few minutes for Valeton's firmware).

Choose a firmware above.

If a flash goes wrong: unplug, hold the foot switch and the PARA knob, plug back in, and flash again. Some cases need more: see Safety.

OpenGP5 is not affiliated with or endorsed by Valeton. "Valeton" and "GP-5" are Valeton's trademarks, used only to say which pedal this works with.

Same protocol and checks as tools/gp5tool.py; nothing leaves your computer except what goes to the pedal. Source, documentation and recovery: github.com/OpenGP5/OpenGP5.