[BUG] NET MAUI on iOS, I read a wrong name connectiong to a Linux device

[acaliaro]

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Steps to reproduce

On a Linux machine, they change the name of the bluetooth device, the "Name" property is not changed but an "Alias" is created. Using the library on an iOS device (iPhone), the library continues to read "Name" and it is not possible to recover the value of "Alias", which is instead recovered if an Android device is used.

Expected behavior

The library should read the Alias instead of the Name, or return the Alias at least in the native part. By downloading some third-party iOS apps, the Linux device is found and the Alias content is displayed

Actual behavior

Only the Name is returned, which however cannot be unique between different Linux

Crashlog

Configuration

Version of the Plugin: 3.1.0-beta.2-10-gf6b048a

Platform: iOS 17.3

Device: iPhone 12

[smsissuechecker]

Hi @acaliaro,

I'm the friendly issue checker.
Thanks for using the issue template 🌟
I appreciate it very much. I'm sure, the maintainers of this repository will answer, soon.

[fteotini-remira]

👍

[janusw]

Note: We have a couple of open issues concerning device names on iOS, e.g. #541, #698, #703, #749. Could you check if any of them is similar to your situation?

There are even two experimental PRs in that direction, but they did not seem to fix anything: #711, #792

[janusw]

On a Linux machine, they change the name of the bluetooth device, the "Name" property is not changed but an "Alias" is created. Using the library on an iOS device (iPhone), the library continues to read "Name" and it is not possible to recover the value of "Alias", which is instead recovered if an Android device is used.

Are you only looking at the advertisements, or are you connected to the device while the name changes?

I'm not sure which effect such an alias has on the advertisements. Could you check what kind of data the device is advertising before and after the change?

[acaliaro]

Hi,

on first discovery we tried to cast IDevice to CBPeripheral, which has the name property containing the name, with the unexpected value. Inspecting the istance of IDevice we can see that there's a property called AdvertisementRecors, but unfortunately is empty.

We are not connected to the device, until it is found by his name during the scan.

CC @Gaburiere-Remira

[acaliaro]

Hi @janusw I have tried 3.1.0-beta.3 the problem seems to be present, although it seems to me that sometimes the name has been returned correctly..

[acaliaro]

@janusw I think the problem is here

   var name = e.Peripheral.Name;
    if (e.AdvertisementData.ContainsKey(CBAdvertisement.DataLocalNameKey))
    {
        // iOS caches the peripheral name, so it can become stale (if changing)
        // keep track of the local name key manually
        name = ((NSString)e.AdvertisementData.ValueForKey(CBAdvertisement.DataLocalNameKey)).ToString();
    }

I think you should have a separate property (LocalName ???) to store the advertisementdata local name so that the developer can decide which one to use

[acaliaro]

I think it is been solved using _adapter.DeviceAdvertised