To reboot Atmotube PRO, hold the main button on the device for approximately 7.5 seconds.
Hold the Atmotube button; the LED should light up.
After 4 seconds, LED will become red.
Continue holding.
After 3.5 more seconds, LED will start blinking red.
Release the button.
Atmotube is rebooting. LED starts blinking orange (VOC sensor heating).