I have a Windows app I have been working on that needs to connect to a bluetooth (BLE specifically) device, however, I have found a huge lack in information on how to do BLE at all for windows in Unreal Engine. There are a couple plugins for BLE, but they are iOS and Android specific, does anyone know anything about how to get BLE working for Windows in Unreal Engine?
Thanks!
I think UE does not support Bluetooth connection out of the box. I guess you’ll have to implement your own C++ code for this, using the Win32 APIs. This is an opportunity for a nice plugin 
(it seems there is a plugin for windows on the marketplace, just requiring for the device to be already paired: https://www.unrealengine.com/marketplace/en-US/product/port-windows)
Qt has ble modual, you can connect with it via IPC if you don’t want to link it together…
Hi! I’m a bit late to the party, but I can share some info.
(Disclaimer, I’m the creator of SimpleBLE, we recently added cross-platform Bluetooth support for Unreal as a plugin.)
Unreal has no direct support to Bluetooth, which means that you’ll need to integrate with WinRT to gain access to that functionality. If you go down that path, be wary of threading issues and test everything thoroughly, the protocol is complex and Windows has its own way of doing things.