Hold down the button on the top of the gauge for about 5 seconds until you see the light come on, then release. The light will blink blue a number of times while your gauge takes a manual reading.
If you see a longer green flash, then the reading was successful. If you see a red light, the reading was unsuccessful. Reconnect your gauge to your WiFi network and then try taking a manual reading again. If that still does not work, please contact us at firstname.lastname@example.org.