![]() Step 4: If Windows finds the latest driver for your Bluetooth, follow the instructions on the screen to finish all the operations and restart your PC to finish the update process. ![]() Step 3: In the pop-up window, choose the first option so that Windows can automatically search for updated driver software. Step 2: Expand Bluetooth and right-click your Bluetooth to choose Update driver. Additionally, you can try other methods to access this utility and here this post is for you - 10 Ways to Open Device Manager Windows 10. Step 1: In Windows 10, right-click the Start button and choose Device Manager. But note that it doesn’t always have the latest available version for your Bluetooth. There is a quick way to update your Bluetooth driver and that is to use Device Manager that allows you to let Windows automatically detect and install a new driver if it finds one. This can be beneficial to other community members reading this thread.Read More Method 1: Update Bluetooth Driver in Device Manager Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This will make COM3 be used for both input and output.įor more information about Configuring a Communications Resource, please refer to this document below. NULL ) // hTemplate must be NULL for comm devices For example: TCHAR *pcCommPort = TEXT("COM3") Ġ, // must be opened with exclusive-access The Read, write, or read/write access can be specified by setting dwDesiredAccess parameter. >However it turns out that COM3 is used for both input and output on my bluetooth modem. I wish Microsoft would make their bluetooth software like Toshiba bluetooth stack - with this software my bluetooth modem gets assigned one single COM port and the whole process of identifying the correct COM port for my bluetooth modem is a lot simpler! ![]() So what is the point in windows 10 assigning COM4 to my bluetooth modem when it cannot be opened as a file and appears to serve no purpose? However it turns out that COM3 is used for both input and output on my bluetooth modem. In the current example I end up with COM3 (input) and COM4 (output) listed under HKEY_LOCAL_MACHINE=>HARDWARE=>DEVICEMAP=>SERIALCOMM. This includes the possibility that the same COM port is used for both input and output. So inside this registry folder I am searching for all the available com ports and then trying all combinations of in and out ports (created via API ::CreateFile(.)) until I find the correct pair associated with my bluetooth modem. These then appear in the registry under HKEY_LOCAL_MACHINE=>HARDWARE=>DEVICEMAP=>SERIALCOMM When I pair Windows 10 with a HC05 bluetooth module I get two COM ports assigned to - one outgoing and one incoming. ![]()
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