Serial Monitor problems

Using Windows 10 ver. 1803 and Aduino IDE 1.6.

I have tried Windows HyperTerminal and TeraTerm.

  1. Running HyperTerminal or TeraTerm first locks the serial port
    then running Python gets "could not open port 'COM6': Permission Error(13, 'Access is denied.', None, 5)"

  2. Running Python program first apparently locks the serial port
    then running HyperTerminal gets "access to port denied"

Obviously, they can't open the same port at the same time.

What's the solution to getting a Serial Monitor that runs with the Arduino at the same time.

Thanks in advance

You can't attach two programs to the same serial port like that. One at a time. If you want to use the python program AND still be able to see in the terminal what's coming over serial then have the python program echo what it receives to the terminal.

Which Arduino are you using? If you want to use hardware serial to communicate with a device (Python), you could use a USB to TTL converter and a set up a (second) software serial port (Uno, etc.) or a spare hardware port (Mega, etc.) to print serial troubleshooting information to serial monitor.