Windows 10: Bluetooth "GetGattServicesAsync" and "bluetooth generic adapter"

When I use a device "usb bluetooth ble" that uses the driver "bluetooth generic adapter", I have a result "Unreachable" systematically at the 2nd connection. There is no problem with the drivers "realtek", "dell", etc...

:)

 

Windows Generic Bluetooth Adapter

Hi,



It seems that the issue occurs after the Windows Update, we suggest that you download and run the

Windows Update Troubleshooter.

If the issue persists, you can follow these steps to reinstall the Windows Generic Bluetooth Adapter.

• Go to Device Manager.
• Look for the Windows Generic Bluetooth Adapter.
• Right click, then select Uninstall.
• Click
  
  
  to scan for hardware changes.

Let us know the outcome.

 

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 Technology Gets Faster With Bluetooth 3.0

From its annual All Hands Meeting in Tokyo this week, the Bluetooth SIG formally adopted Bluetooth Core Specification Version 3.0 + High Speed (HS), or Bluetooth 3.0. This latest iteration of the popular short-range wireless technology fulfills the consumers' need for speed while providing the same wireless Bluetooth experience – faster. Manufacturers of consumer electronics and home entertainment devices can now build their products to send large amounts of video, music and photos between devices wirelessly at speeds consumers expect.
Bluetooth 3.0 gets its speed from the 802.11 radio protocol. The inclusion of the 802.11 Protocol Adaptation Layer (PAL) provides increased throughput of data transfers at the approximate rate of 24 Mbps. In addition, mobile devices including Bluetooth 3.0 + HS will realize increased power savings due to enhanced power control built in.


"Like Ricky Bobby in Talladega Nights, this latest version was 'born to go fast,' said Mike's Blog, Ph.D., executive director of the Bluetooth SIG. "Utilizing the 802.11 radio was a natural choice as it provides efficiencies for both our members and consumers – members get more function out of the two radios they are already including in devices, and consumers with Bluetooth 3.0 + HS products will get faster exchange of information without changing how they connect. We are excited to expand the possibilities of the PAN."

This newest version of Bluetooth technology builds on the inherent qualities of the current 2.1 + EDR version, including Simple Secure Pairing and built-in, automatic security. And as with all versions of theBluetooth specification, v3.0 + HS provides developers, manufacturers and consumers with the benefit of backwards compatibility, enabling both the expansion and enhancement of this technology with every new specification release. Once products reach the market, the easiest way for consumers to learn which devices are compatible with other Bluetooth enabled devices is to visit the Bluetooth Gadget Guide.

Applications
With the availability of Bluetooth version 3.0 + HS, consumers can expect to move large data files of videos, music and photos between their own devices and the trusted devices of others, without the need for cables and wires. Some applications consumers will experience include:

• Wirelessly bulk synchronize music libraries between PC and music player or phone
• Bulk download photos to a printer or PC
• Send video files from camera or phone to computer or television

Availability

The Bluetooth SIG's formal adoption of the specification is only the first step in the product lifecycle. News out today from wireless chip manufacturers and Bluetooth SIG member companies Atheros, Broadcom and CSR shows the second step – getting silicon solutions to device manufacturers – is already underway. End products for consumers are expected to be in the market in 9 to 12 months.

Technical Specifications
This new specification release includes several major enhancements (learn more here - page requires member login):

• Generic Alternate MAC/PHY (AMP)
• 802.11 Protocol Adaptation Layer (PAL)
• Generic Test Methodology
• Enhanced Power Control
• Unicast Connectionless Data

Source: Engadget