grooverfromholland / simplebleexample_by_devicename Goto Github PK

Copy/Paste from nkolban/esp32-snippets#546

Thanks, I appreciate you time to write this comment. I'm still on an early stage of understanding how everything works. I've downloaded the complete solution from your repo and ran the code. It crashes on line 87 inside MainPage.xaml.cs:
System.ArgumentOutOfRangeException: 'Specified argument was out of the range of valid values.'

Thanks again for the sample, it's indeed very well commented and very helpful.

Edit: Here's what's showing for services variable:
| services | {System.__ComObject} | System.Collections.Generic.IReadOnlyList<Windows.Devices.Bluetooth.GenericAttributeProfile.GattDeviceService> {System.__ComObject}

I've made sure I have entered correct MyService_GUID on line 34. Any help much appreciated.

I believe the code that I was using on my HUZZAH32 (esp32 dev board) was somehow incorrect. I've tried my luck with some other examples, such as BLE_server and BLE_notify:
https://github.com/nkolban/ESP32_BLE_Arduino/tree/master/examples

With both examples, I get Exception from HRESULT: 0x80650003. It comes from line 133:
var descriptorWriteResult = await charac.WriteClientCharacteristicConfigurationDescriptorAsync(descriptorValue);

Here's the console output:

Device found in 299 ms
Signalstrengt = -48 DBm
Ble address = 53526636485438
Advertisement type = ConnectableUndirected
Connected in 40 ms
Service found in 3 ms
Characteristic found in 65 ms
This characteristic supports reading .
This characteristic supports writing .
Exception thrown: 'System.Exception' in System.Private.CoreLib.ni.dll
An exception of type 'System.Exception' occurred in System.Private.CoreLib.ni.dll but was not handled in user code
The attribute cannot be written. (Exception from HRESULT: 0x80650003)
The program '[16784] SimpleBleExample_by_Devicename.exe' has exited with code -1 (0xffffffff).

https://github.com/GrooverFromHolland/SimpleBleExample_by_Devicename/blob/c35f2bc3ff925ed493920c2dac478c784a493be0/SimpleBleExample_by_Devicename/MainPage.xaml.cs#LL144C1-L144C105

DEbug statement outputs result, I think it should be descriptorWriteResult

Hi
Sometimes randomly o running your code i get this exception also:


Operation Aborted(Exception from HRESULT).....
in
var notifyResult = await charac.WriteClientCharacteristicConfigurationDescriptorWithResultAsync(GattClientCharacteristicConfigurationDescriptorValue.Indicate);