How to open 2 serial monitors with different COM ports

Hi guys,

I am implementing 2 arduino unos to talk via the I2C line. The master uno would take in a serial input from user via the serial monitor and transfer this information to the slave.

The slave will switch between the available commands to do certain tasks and print out another set of serial output to another serial monitor.

The problem is, i am unable to open 2 serial monitor of COM port 4 and COM port 5. Can anyone teach me how that can be done?


Try starting up 2 separate instances of the IDE, one for each Uno.
It won’t work if you start 2nd editing windows from a single instance of the IDE.

thanks so much. it works!