Firmware: Rescue Mode - KissUltra/wiki GitHub Wiki

If for some reasons, your firmware update process failed, and your ultra doesn't start as usual, you can reflash it using RESCUE MODE. Here is the sequence you have to perform.

• Connect ultra to usb
• Start standalone gui or visit web gui at https://kiss-ultra.com
• CLICK boot button on ultra. Blue led will start blinking fast.
• Connect gui
• flash firmware as you would normally do

Keep in mind.. The window with gui should be on top of all windows at all times!