B4R Question [SOLVED] B4R LCD Display

Johan Schoeman

Licensed User
Longtime User
I am trying out the project here:

UNO R3 is connected to COM39 and compiled/installed the B4R project to the Uno R3 successfully. The LCD display shows "waiting for time".
The B4J project list COM39 but when I try to connect I get this error:
(SerialPortException) jssc.SerialPortException: Port name - COM39; Method name - openPort(); Exception type - Port busy.

The post seems to be busy - I can however compile and run the B4A project without any hassle. I don't have the Arduino IDE open so the port is not locked by the Arduino IDE.

Any suggestions how to solve this will be much appreciated.