How does BLE technology work?
BLE operates in the 2.4 GHz ISM band. The framework has 40 2 MHz-wide communication channels. Of these, 3 are primary and the rest are secondary channels. Communication starts with primary channels before offloading to secondary channels. BLE also works well in conjunction with BLE beacons, which are radio transmitters that broadcast an ID number through BLE channels in a particular range. When an app on a Bluetooth enabled device picks up this ID number, it performs the action intended by the signal, such as showing content relevant to the broadcaster.