In AP mode, you need to have your laptop or computer connect to the AP name that OpenSprinkler creates (the OS_xxxxxx SSID). Then once connected, open a browser and type in: http://192.168.4.1/update
To enter bootloading mode, the correct procedure is as follows:
– remove all power from OpenSprinkler (i.e. remove orange terminal block, and unplug USB).
– press and hold B2, then plug the USB cable in. Then release the button. The LCD will remain off, indicating it’s in bootloading mode waiting for program to be uploaded.