Emergency Factory Reset¶
If the worst happens, and you somehow get locked out, perhaps for whatever reason the dropbear ssh session does not start or wifi config gets all screwy, it is still possible to trigger an emergency factory reset via USB or GrumpyScreen.
Configure Wifi¶
If your only problem is that you cannot get wifi to work and for whatever reason GrumpyScreen is not behaving you can brute force a new set of WIFI credentials via Configure Wifi via USB, although currently this only works for K1 Series!
Via Grumpyscreen¶
Click the Factory Reset button from the Tools menu of GrumpyScreen.
Danger
It is vital you do not power cycle your printer before the stock screen appears. There may be a 3002 error on the screen, this is completely normal. If you are planning to install Simple AF you can ignore it, if you are trying to go back to stock, power cycle the printer again to clear the error.
Failing to follow this advice can lead to your printer getting bricked and requiring much more involved intervention to recover!
Via USB¶
It is very easy, you just need to create a empty file called emergency_factory_reset on a USB key and make sure the USB key is plugged in, then power cycle the printer, this will initiate a factory reset.
Tip
If you are having trouble creating a file like this in windows, the easiest way is to download the emergency_factory_reset.zip and extract it onto your usb thumb drive.
Info
This factory reset method will rename the emergency_factory_reset to emergency_factory_reset.old to avoid a boot loop, so if you need to use this method again you will need to rename the file.
This factory reset method will not remove the special service file /etc/init.d/S58factoryreset from the k1, so if you need it you can redo a factory reset even before reinstalling.
This method does not reset wifi or root access
Danger
It is vital you do not power cycle your printer before the stock screen appears. There may be a 3002 error on the screen, this is completely normal. If you are planning to install Simple AF you can ignore it, if you are trying to go back to stock, power cycle the printer again to clear the error.
Failing to follow this advice can lead to your printer getting bricked and requiring much more involved intervention to recover!