---
title: "handleAccessorySensorMessage(_:)"
framework: AudioAccessoryKit
role: symbol
role_heading: Instance Method
platforms: [iOS 27.0+]
path: "audioaccessorykit/audioaccessoryheadtracking/handler/handleaccessorysensormessage(_:)"
---

# handleAccessorySensorMessage(_:)

Called when a TransportMessage arrives from the accessory’s transport extension on the inbound channel.

## Declaration

```swift
func handleAccessorySensorMessage(_ message: TransportMessage)
```

## Parameters

- `message`: The transport-layer message as delivered by DeviceAccess.

## Discussion

Discussion Use this to receive control-plane payloads from your AccessoryTransportExtension (e.g. configuration acknowledgements, vendor-specific messages). For raw IMU sample delivery, the extension should call Session.sendDataToAudioExtension(_:) directly.