A Factory Reset will erase all user settings including passwords, returning the module to factory defaults.
To reset and OpenEVSE WiFi module to factory defaults:
Power on the module with either a USB serial adapter or within the station.
Caution - if powering with the station use extreeme caution as high voltage power is present on the relay and left side of the OpenEVSE controller.
Press and hold the GPIO0 button for at least 10 seconds.