Window APIs support connecting to paired BT devices

Question

Window APIs support connecting to paired BT devices

Damon Pan 126

Is there any Windows APIs supporting to connect to a paired BT devices. If not, does the Bluetooth Windows Socket programming support this function? Thanks.

Xiaopo Yang - MSFT 12,731 Reputation points Microsoft External Staff

2023-04-11T02:17:53.9733333+00:00

What do you mean supporting to connect to a paired BT device? The Bluetooth Windows Socket programming supports making a Bluetooth connection of course. See the Microsoft Bluetooth samples. Also, you can go through other Bluetooth samples.
Damon Pan 126 Reputation points

2023-04-11T04:53:05.36+00:00

Hi Xiaopo, I means, implement the similar function as Windows settings app in my application. e.g, if PC paired with a BT earbuds, but it disconnected sometimes later. I want to implement a function to make PC connect to BT earbuds in my application.
Damon Pan 126 Reputation points

2023-04-11T04:55:36.3266667+00:00

WinsockBluetoothConnection seems to setup a connection between client and server. cannot use for connecting PC to earbuds.

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Xiaopo Yang - MSFT 12,731 Reputation points Microsoft External Staff

2023-04-11T02:17:53.9733333+00:00

What do you mean supporting to connect to a paired BT device? The Bluetooth Windows Socket programming supports making a Bluetooth connection of course. See the Microsoft Bluetooth samples. Also, you can go through other Bluetooth samples.
Damon Pan 126 Reputation points

2023-04-11T04:53:05.36+00:00

Hi Xiaopo, I means, implement the similar function as Windows settings app in my application. e.g, if PC paired with a BT earbuds, but it disconnected sometimes later. I want to implement a function to make PC connect to BT earbuds in my application.
Damon Pan 126 Reputation points

2023-04-11T04:55:36.3266667+00:00

WinsockBluetoothConnection seems to setup a connection between client and server. cannot use for connecting PC to earbuds.

Answer 1

Xiaopo Yang - MSFT 12,731 Microsoft External Staff

According to Bluetooth and connect,

Bluetooth uses the connect function to connect to a target Bluetooth device, using a previously created Bluetooth socket.

Try Bluetooth app to device sample. But you cannot let Windows connect like Windows Settings do because Windows uses internal APIs to work with Windows components.

Damon Pan 126 Reputation points

2023-04-11T11:35:43.38+00:00

Thank you very much Xiaopo, let me try and feedback to you. I check the API used in this app, it's for Windows 8 only. Is there any sample for Windows 10 and Windows 11?
Xiaopo Yang - MSFT 12,731 Reputation points Microsoft External Staff

2023-04-12T01:27:59.4333333+00:00

These APIs apply to WinRT Build version 10240 and later. Is it for Windows 8 only?
Damon Pan 126 Reputation points

2023-04-12T03:12:53.28+00:00

I want to build such UWP/Win32 app on Windows 10 and windows 11. And my requirement is to connect a paired BT earbuds. There is not socket client/server on earbuds, so how to use windows socket api from PC to connect BT earbuds?
Xiaopo Yang - MSFT 12,731 Reputation points Microsoft External Staff

2023-04-12T03:18:41.3+00:00

The sample applies to Windows 8 and later. Get the paired BT earbuds Bluetooth address and Use socket to connect from your application like the Bluetooth app to device sample does. But you may not let Windows connect because Windows may use internal APIs to work with Windows components.
Damon Pan 126 Reputation points

2023-04-12T07:13:13.5133333+00:00

Hi Xiaopo,
this sample works on my PC https://github.com/microsoft/Windows-classic-samples/blob/27ffb0811ca761741502feaefdb591aebf592193/Samples/WinsockBluetoothConnection/cpp/bthcxn.cpp But the connect cost ~7s, it's long time.
Xiaopo Yang - MSFT 12,731 Reputation points Microsoft External Staff

2023-04-12T07:27:13.8566667+00:00

You can debug the sample to troubleshoot but there could be no problem for the connecting time because of WSALookupServiceBegin.

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Window APIs support connecting to paired BT devices

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