UIBackgroundModes bluetooth-central nearby-interaction NSCameraUsageDescription Camera is required for ARKit world tracking to estimate the UWB anchor position in 3D space. NSBluetoothAlwaysUsageDescription Bluetooth is used to communicate with the Qorvo DWM3001CDK UWB anchor and exchange NearbyInteraction session configuration data. NSNearbyInteractionUsageDescription Nearby Interaction is used to measure precise UWB distances to the DWM3001CDK anchor device.