core-bluetooth

Scanning for BLE devices in iOS requires configuring your app as a BLE central to discover nearby peripherals advertising specific services. You can then establish a connection and begin interacting with available characteristics.

Yes, your iOS app can read and write data to BLE devices in the background by enabling specific background modes. This maintains Bluetooth Low Energy connectivity and allows peripheral advertising even when the app is not active.

State restoration for BLE connections automatically restores your central and peripheral states after an app relaunch. This mechanism re-establishes previous Bluetooth Low Energy device connections and pending operations without manual user intervention.

Yes, you can use your iOS device as a BLE peripheral to advertise custom services and data. The Core Bluetooth framework supports both central and peripheral roles, allowing your device to broadcast information to nearby BLE centrals.

The best way to monitor real-time sensor data over BLE on iOS is to subscribe to characteristic notifications. This allows your central role app to receive continuous updates, such as heart rate BPM, directly from the connected peripheral.