Johan Schoeman Expert Licensed User Longtime User May 12, 2019 #1 I am trying out the project here: https://www.b4x.com/android/forum/threads/lcd-clock-example.65726/ 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: Code: Copy (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. JS
I am trying out the project here: https://www.b4x.com/android/forum/threads/lcd-clock-example.65726/ 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: Code: Copy (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. JS
Johan Schoeman Expert Licensed User Longtime User May 12, 2019 #2 Unplugged and plugged in again the USB cable on the PC side and then all OK. Did not want to cooperate when unplugging the USB cable from the Uno side. Upvote 0
Unplugged and plugged in again the USB cable on the PC side and then all OK. Did not want to cooperate when unplugging the USB cable from the Uno side.
