Pierre detects the presence of a mobile phone
Define the radius around your office, building or home, and Pierre will automatically open the gate or door when you enter this range, without taking your mobile out of the pocket.
For example, when you enter the 2-kilometer range of home, Pierre turns on the heating and when you enter the 500m range, it opens the gate. Basically, you can choose what will be triggered with you entering previously set range.
Also, when you leave the house, and exit previously defined radius, Pierre can lock all the doors, turn off the lights, and heating, for example.