Good to hear that it’s finally working.
As to buttons: this depends on which firmware your controller is currently running. Firmware 2.1.0 uses B1 to display OpenSprinkler’s IP, B2 to display router’s IP; pressing B1 during power-on goes to factory reset, pressing B2 during power-on does nothing. Prior to firmware 2.1.0, pressing B1 during power-on goes to self-test, pressing B2 during power-on goes to factory reset.