Bluetooth Low Energy (BLE) is a wireless personal network technology. It connects a mobile device with a stationary one using the same radio frequencies as classic Bluetooth. However, BLE uses a simpler modulation system than classical Bluetooth. In addition, it also has a much lower energy consumption.
BLE is used in devices that exchange a small amount of data periodically, such as proximity sensors, heart rate monitors, and fitness devices. In addition to such devices, technologies that are used to develop keyless entry to cars also operate via BLE. For example, Lincoln’s Phone-as-a-Key uses BLE because it works in areas where cell-signal is limited or where there is no signal at all, such as in underground garages and tunnels.