Perhaps this might help someone? I have been plagued with Bluetooth issues for almost 2 weeks now. I have tried plenty of changes, and configs (will get into them) and came to some conclusions.
- Windows 10 (v2004 - May 2020 update) - clean install on Wed June 10, 2020
- Intel Bluetooth v5.1 chipset (driver: 220.127.116.11 - Apr 22, 2020)
- Generic Bluetooth v4.0 (TP-Link USB Dongle) (driver: 10.9.19041.1 - June 21, 2006)
[I am not running them both at once. I tried them both separately]
- On the pairing screen -> if i pair my HRM (Garmin Duo-HRM) first, the trainer won’t pair. If i pair my trainer first, the HRM won’t pair!
- This sounds like a known issue in Win 10 Bluetooth that dates back quite a while. The only issue is: that known issues claims to only affect Realtek Bluetooth devices. (i have Intel and TP-Link)
- Disable the Bluetooth 5.1 device, and enable the Bluetooth 4.0 device -> HRM and trainer connect very quickly!
What i tried:
Clean install of Windows 10 (yup. from scratch! - twice!)
Tried Win 10 v2004 and Win 10 v1909 (same problem on both versions)
Tried 3 different Intel Bluetooth cards. (v4.2 and two v5.1)
Those 3 cards all used the latest Intel Bluetooth drivers (perhaps where the issue is?)
Tried the TP-Link UB4A Nano USB Bluetooth 4.0 Dongle. ($15) This one that is using the drivers from 2006
THAT seems to work for me.
Still holding out hope that the Intel drivers / Windows 10 will get sorted soon.
Here’s the kick in the teeth: The issue only seems to affect pairing in Zwift!! If i go to the Bluetooth pairing section of Windows, i can pair a bunch of devices (HRM, headphones, mouse, etc)
But if i try to pair more than one device through a third-party app (Zwift) it does not work.
The next thing i will try - when i have some patience - is running everything over Ant+