BLE (Bluetooth Low Energy) a wireless area network technology facilitating data transmission in close proximity. The meaning of this technology relates to its ability of low energy consumption in maintaining communication range just like classic Bluetooth, its predecessor. It is also nicknamed as Bluetooth 4.0 and considered substantially useful for apps needing periodical data exchange in short amount. To simplify, it differs from Bluetooth based on the fact that similar amount of data transfer consumes less energy compared to normal Bluetooth, thus extending the lifespan of battery.