Drivers for modules like the HC-05 often support both Master and Slave roles, allowing the device to either initiate or receive connections. Driver Compatibility & Installation
Generally supports Class 2 Bluetooth ranges, effective up to 10 meters (33 feet).
Move the dongle to a different USB port (preferably a rear motherboard port on desktops). Driver conflict with an existing internal Bluetooth card.
Find "Bluetooth Support Service," right-click it, select , set the "Startup type" to Automatic , and click Start .