Windows 11: Bluetooth Serial connects then immediately disconnects
Posted: Wed Oct 29, 2025 10:48 am
using Arduino IDE 2.3.4 ESP32 core 3.3.2 running Bluetooth Classic example SerialToSerialBT serial monitor displays
Android phone connects OK and transfers data using Bluetooth terminal app
However, attempting to connect using Windows 11 "Add a device" it displays Connected for a fraction of a second then Not Connected - two virtual COM ports appears in Device Manager but attempts to connect to them using teraterm fail
Windows 10 connects to SerialToSerialBT without problems and teraterm terminal emulator communicates with COM port OK
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The device with name "ESP32-BT-Slave" is started.
Now you can pair it with Bluetooth!However, attempting to connect using Windows 11 "Add a device" it displays Connected for a fraction of a second then Not Connected - two virtual COM ports appears in Device Manager but attempts to connect to them using teraterm fail
Windows 10 connects to SerialToSerialBT without problems and teraterm terminal emulator communicates with COM port OK