How to restart a HummBOX?

If the BOX has connectors (see photo):

Disconnect all sensors, and reconnect at least one sensor.

If the BOX does not have connectors (HummBox Air Indoor or HummBox Level compact):

Press the button 5 times * in a time less than 1 second (1 press every 0.2 seconds) *

valid for BOX whose firmware version is greater than 46 (see device information in the admin interface)