The gateway works partly as a hub and partly as a data concentrator for data from all connected devices.
A Bluetooth® Low Energy (BLE) gateway connects BLE devices with other networks, such as Wi-Fi or Ethernet. It receives Bluetooth® Low Energy signals transmitted by nearby BLE devices, like BLE beacons or sensors, and then forwards that data to a cloud-based service or a local server for further processing and analysis. BLE gateways are commonly used in IoT (Internet of Things) applications, where they enable the integration of BLE devices into larger, interconnected systems.
BLE Beacon and BLE Gateway