Make sure the Bluetooth device is connected to the phone;
Try killing the HiByBlue application, then reopen HiByBlue to connect;
Try to delete the pairing information of the Bluetooth device, re-pair, connect, and then open HiByBlue to connect;
Try turning off the Bluetooth device, then wait 10 minutes, turn on the Bluetooth device again, turn on HiByBlue to connect;
Intercept pictures that cannot be connected, contact HiBy customer service, and assist in providing mobile phone information, HiByBlue APP version, and your Bluetooth device information;