Press and hold the button on the side of the Smappee monitor. The color of the LED will change. Release the button once the color is steady blue. Please ignore all other colors.
Smappee will return to flashing blue after a successful reboot, which may take up to 3 minutes.
Smappee is then back in install mode.
To re-install the Smappee monitor, go to the monitor's location in the mobile app and select Settings > Your Smappee Monitors > Repeat installation.
You can also create a new location and install the monitor there.