Building heating, ventilation, and air conditioning
(HVAC) systems are considered to be the main target for energy
reduction due to their significant contribution to commercial
buildings’ energy consumption. Knowing a building’s occupancy
plays a crucial role in implementing demand-response HVAC.
In this paper we propose a new solution based on the iBeacon
technology. This solution is different from the previous ones
because it leverages on the Bluetooth Low Energy standard,
which provides lower power consumption. Moreover, the iBeacon
protocol can be used both on iOs systems and Android ones,
making this new approach portable. Differently from our
previous work based on iOS devices, in this paper we focus on an
Android based solution with the aim of increasing the accuracy
of the location and the energy efficiency of the entire system. We
increased the accuracy by 10% and the energy efficiency by 15%.