# monitorNotifications(reportIDsToMonitor:elementsToMonitor:) Creates an asynchronous that receives notifications about the associated device. ``` func monitorNotifications(reportIDsToMonitor: [ClosedRange], elementsToMonitor: [HIDElement]) -> AsyncThrowingStream ``` ## Parameters `reportIDsToMonitor` The report IDs that should trigger an [`HIDDeviceClient.Notification.inputReport(id:data:timestamp:)`](/documentation/CoreHID/HIDDeviceClient/Notification/inputReport(id:data:timestamp:)) notification. `elementsToMonitor` The elements that should trigger an [`HIDDeviceClient.Notification.elementUpdates(values:)`](/documentation/CoreHID/HIDDeviceClient/Notification/elementUpdates(values:)) notification. Elements of interest can be parsed from [`elements`](/documentation/CoreHID/HIDDeviceClient/elements). ## Return Value An asynchronous stream that receive notifications. ## Discussion Notifications come in asynchronously from the device at arbitrary times when relevant events occur. Example usage: ```swift for await notification in try await client.monitorNotifications(reportIDsToMonitor: [HIDReportID.allReports], elementsToMonitor: await client.elements) { switch notification { case .inputReport(let reportID, let report, let timestamp): break case .elementUpdates(let values): break case .deviceSeized: break case .deviceUnseized: break case .deviceRemoved: break } ``` > Throws: ``doc://com.apple.CoreHID/documentation/CoreHID/HIDDeviceError`` if there is an issue with setup. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)