Windows 10: LE bluetooth device connections: what are they used for?

I have a pair of wireless headphones and a wireless speaker. i can turn both on and connect them to my win10 computer fine, BUT:

-My headphones can't be discovered or turned on when the switch on them is switched to off.

-My headphones offer two connections, standard and LE, but I can only connect with the regular one and the LE one just lets me pair and then adds it as an "Other Device".

- neither my headphones nor my speaker seem to connect to the computer faster when their LE bands have also been paired, so i re-unpaired them for now lol.

-my speaker's LE band can still be discovered and paired when it is off, but like the headphones it cant be used and is added to the "Other Devices" list.

-i can turn my speaker on from a device it is paired with while it is off.

So my questions are:

1. what are the LE signals i can pair with on my windows computer used for?
2. why cant i see the LE signals on my phone, and why dont the LE signals get paired to my laptop when the regular signal does?
3. If I can discover the speaker's LE band from windows even though the speaker is off, is it still using some really low power to keep a signal beamed out so that it can pick up commands to turn on from paired devices?

submitted by /u/inertialambda
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:)

 

Bug in windows bluetooth le GetGattServicesAsync method

The problem description:
Sometimes it is not possible to get some response from the method GetGattServicesAsync with the parameter BluetoothCacheMode.Cached or BluetoothCacheMode.Uncached. Only the windows restart helps to reconnect the le device and to get the services from the le device.

We use Windows.Devices.Bluetooth.dll with .Net Framework 4.6.1 to build the class library.
The Windows PC shall connect the Bluetooth le device.

Steps for the problem reproducing:

1. Discovery the devices with the determined service
   
2. Call the method FromBluetoothAddressAsync with the Bluetooth address of LE device
   
3. BluetoothLEDevice is found
   
4. Pair the LE device with desktop:
   
   
5. Check the connection status. If the status connected, call the method GetGattServicesAsync(BluetoothCacheMode.Cached)
   
6. Sometimes is not possible to get the response from GetGattServicesAsync. After 30 seconds we cancel the task, dispone BluetoothLEDevice, unpair and try to reconnect le device. The reconnection is failed and only the Windows restart helps to establish the connection to the le device.
   

PC:

• Dell Precision 5530
  
• Bluetooth adapter Qualcomm QCA6174A
  
• Windows 10 Enterprise (1803)
  
• Version 10.0.17134 Build 17134.590
  

LE Device:

• Bluetooth 4.2
  

 

Bluetooth Connection Issue - headphones, LE vs regular connection

Hello,

Thank you for writing to Microsoft Community Forum.

To have a better clarity on the issue and guide you accordingly, respond to the questions listed below:

1. Have you tried connecting the headphones to another computer and check if it’s working fine?
   
2. What is the make and model of the computer?
   

Meanwhile, I would suggest you with few simple steps. Kindly follow the same.

Step 1: Troubleshoot problems with Bluetooth accessories.

If you can turn on Bluetooth but are having problems pairing or using a Bluetooth accessory, kindly follow the article which gives you steps on
Audio troubleshoot problems from - https://support.microsoft.com/en-us/help/14169/windows-10-fix-bluetooth-problems

Step 2: There are two terms regarding Bluetooth: pairing and connecting. Pairing is the introduction of one device to another. Once paired, they will stay in each other’s memory until manually erased. Once a device
is paired, the headset can then connect to that device to receive audio or voice from the device.

• Go into the device's paired list and manually select the Bluetooth.
  
• You may need to clear your paired list in your headset and re-pair your headset to your device.
  
• To clear your paired list in your headset, follow these steps: on the headset, press and hold the call and volume – buttons for 10 seconds
  
• The headset will revert to discoverable mode (slowly blinking LED), allowing you to re-pair the computer you want connect.
  

We await your response.

Regards,

Mala. S

Microsoft Community

 

Bluetooth Connection Issue - headphones, LE vs regular connection

I am having issues connecting my bluetooth headphones to my computer. When I go to connect using the bluetooth settings -> "Add bluetooth or other device", I am able to see my headphones in two listings: "Bose AE2 Soundlink" and "LE-Bose AE2 Soundlink".

I can connect to the "LE-Bose AE2 Soundlink", but this does not provide any audio connection between my computer and headphones. My headphones do not indicate any connection with my computer. In the Control Panel -> Hardware and Sound -> Devices and Printers,
the "LE-Bose AE2 Soundlink" is listed under "Unspecified".

I cannot connect to the "Bose AE2 Soundlink" at all. When trying to connect, the "Add bluetooth or other device" option returns with "Couldn't connect. Try connecting again".

These issues began around mid to end of October 2018. I was previously able to use my bluetooth headphones with my computer without issue. I am using Qualcomm Atheros Bluetooth hardware.

I believe the issue is related to using bluetooth LE connections for headphones. I have also looked into the "Bluetooth USB module" device details in the device manager and have looked through the properties. I noted one property: "Bluetooth radio are BR
secure connections supported" value is "<false>", while the next property: "Bluetooth radio are LE secure connections supported" value is "<true>".

I have tried to connect other bluetooth headphones with the same results as the Bose AE2 Soundlink.

Are my connection problems related to the Bluetooth LE connections? Are they related to the BR (basic rate) connections? Is this a hardware issue?

I have tried the following known resolutions, and all have failed:

1) Updating Bluetooth Drivers

2) Uninstalling and Reinstalling Bluetooth Drivers

3) Uninstalling Bluetooth Device, Forgetting all connections on bluetooth headphones, then trying to reconnect bluetooth headphones

4) Running Bluetooth troubleshooter

5) Running hardware and devices troubleshooter