---
title: "getRFCOMMChannelID(_:)"
framework: IOBluetooth
role: symbol
role_heading: Instance Method
path: "iobluetooth/iobluetoothsdpservicerecord/getrfcommchannelid(_:)"
---

# getRFCOMMChannelID(_:)

Allows the discovery of the RFCOMM channel ID assigned to the service.

## Declaration

```swift
func getRFCOMMChannelID(_ rfcommChannelID: UnsafeMutablePointer<BluetoothRFCOMMChannelID>!) -> IOReturn
```

## Parameters

- `rfcommChannelID`: A pointer to the location that will get the found RFCOMM channel ID.

## Return Value

Return Value Returns kIOReturnSuccess if the channel ID is found.

## Discussion

Discussion This method will search through the ProtoclDescriptorList attribute to find an entry with the RFCOMM UUID (UUID16: 0x0003). If one is found, it gets the second element of the data element sequence and sets the rfcommChannelID pointer to it. The channel ID only gets set when kIOReturnSuccess is returned.