I have built the program as described in the YouTube article youtube.com/watch?v=gL7b8E_5aYs. The HC05 connected to the Arduino Uno is paired the Samsung smartphone.
When the slider in the app is moved an error appears "Error 515: Not connected to a Bluetooth device". The first ListPicker1 block calls and connects BluetoothClient1 . Text1 reads "not connected" in red.
I am a Bluetooth newbie. Can you help me???
Thanks in advance.