Hi,
Add
uses
wclUIIDs;
Remove this line:
SerialPortServiceClass_UUID = "{00001101-0000-1000-8000-00805F9B34FB}"
Depends on your device but usualy:
wclClient.BluetoothParams.Authentication = True
Remove this line:
wclClient.BluetoothParams.Channel = 1
Of course, if your device has SPP