Learning MCU encountered Bluetooth crash
When the Bluetooth serial port is sent, the Bluetooth function suddenly disappears as shown below:
Reason: The sending speed of the single chip microcomputer is too fast, the serial port continuously sends data to the computer, causing the computer to crash.
Solution: I have experienced this situation 6 times before and after. The summary method is as follows: (3 methods, some netizens are opened in the bios system, I have not tried it. Of the methods I listed, the first two are not good enough to use the third one. The third one I succeeded 4 times )
1. WIN + R input: services.msc
Open the service: Then turn on the Bluetooth start service starting with B in English.
Note I solved it only once with this method, in most cases it will not work
2. Download a Bluetooth driver: link is also a successful one
3. Focus : The rest is solved by this method:
(1) First open the device manager in the control panel:
(2) Then turn down and find the Bluetooth adapter in the network adapter ( if the Bluetooth function disappears at this time, the small icon of the (Bluetooth Device) computer in front of the adapter should be light-colored , My screenshot under normal circumstances )
(3) Right-click Bluetooth Device to uninstall the device
(4) At this time in the service to see, the Bluetooth item should disappear.
(5) In the settings, update the system 
Click Windows Update to 
check for updates, download and install.
Finally restart the computer, the Bluetooth icon appears
Note: When sending data through the Bluetooth serial port, be sure not to send continuously, and put a delay function in the middle.
Thank you for reading. If it solves your problem, please leave a comment.
