In order to reduce the impact on battery life, we are currently working on a news solution that does not rely on the HTTP protocol; since we have noticed from our tests that bluetooth communications are extremely power efficient when a continuos messaging is required, we are designing a new version of the system where the data is transmitted by the devices back to the beacons antennas through BLE; the antennas are then in charge of sending them back to the servers where the classification algorithms are executed.