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

---

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]

Hi Peter,

Thank you for your help. It looks like CreateFile() works I found the code you pointed to me and implemented on my Win 8.1 I have one problem though. When I call hr = BluetoothGATTSetDescriptorValue( hBLEDevice, currGattDescriptor, &newValue, BLUETOOTH_GATT_FLAG_NONE);

I get error code 0x80650005 - The attribute requires authentication before it can be read or written

Do you have any idea what this means? In my case Win 8.1 is paired with my device so I'm not sure about this error. Looks like CreateFile is working because I only get this error when trying to set the descriptor value.

I appreciate your time and help. Cheers,