nRF51822 does not work with Windows 8.1

[Gilson]

Gentlemen,

I'm trying to develop a Health profile solution that works with Win 8.1

1. I'm using SDK 6.0 and S110 v 7
2. Win 8.1

I found the Win 8.1 sample app with heart rate, blood pressure and thermometer.

My nRF51822 works fine with nRFTools on Android, I see all of the characteristics my code made available including battery level, temperature, etc.

On Win 8.1 first issue I had to overcome is pairing. it looks like it is a known bug in S110 v7. There is a need for a special code before the nRF51822 starts advertising.

Now I can pair with Win 8.1 but I'm seeing the following error:

"Getting the device failed with error: 80070057"

Has anyone here implemented health profile to be used with MS sample code for BluetoothLEHealthProfiles ?

On Windows 8.1 I read somewhere that there is a need for a metadata structure. What does it mean? what is this metadata some developers are talking about?

Thanks much for your help.

[Peter Myerscough-Jackopson]

I haven't used the BluetoothLEHealthProfiles, but I have managed to get code working in Win8.1 Desktop using the CreateFile() method, rather than the Modern/WinRT function calls.

Have a look at :

social.msdn.microsoft.com/.../how-to-retrive-gatt-attributes-using-bluetooth-le-apis-in-win32-console-application

and

msdn.microsoft.com/.../jj159880(v=vs.85).aspx

Using the above code and the corrected HRM example it should be possible to connect and retrieve data from the device.

As an aside, I haven't found a way to associate different services offered by the same device with each other in Windows. For example, heart rate and battery are separate services, but if you have two devices I don't know how to tell which battery service matches with which heart rate service. I am currently making a custom service with all my desired characteristics together. This is not how Bluetooth SIG designed it, but it is how I feel I must currently work with Windows.

Good luck

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Edit

The two links that got me going were these:

social.msdn.microsoft.com/.../erroraccessdenied-error-when-trying-to-receive-data-from-bluetooth-low-energy-devices

social.msdn.microsoft.com/.../is-there-a-simple-example-desktop-programming-c-for-bluetooth-low-energy-devices

Particularly the second one.

Sadly my code is now very much refined to a non-generic device, a long way from the standard heart rate monitor. The above links however contain code that should get you going with a HRM and contain a lot of explanation.

[Gilson]

Hello Peter, I think my issue above was because when I was trying to set the descriptor to "subscribe to notification" via BluetoothGATTSetDescriptorValue my code was incorrect. I noticed that my device CCCD does not offer 'Notify' but 'Indicate' so the following settings would cause the issue:

	newValue.ClientCharacteristicConfiguration.IsSubscribeToNotification = TRUE;

but the following settings fixed the issue:

	newValue.ClientCharacteristicConfiguration.IsSubscribeToIndication = TRUE;