Hello all! I have an irritating little problem!
I've been using the Serial module in python to transfer instructions to the Arduino. Sending the data appears to work fine, but after I've connected to the Arduino from my Python program I cannot open the serial monitor.
It just says 'Error opening serial port '/dev/cu.usbmodem1421'. (port busy)'
This makes it rather hard to debug the program, seeing as I don't know what's being fed into it. I have no idea if this is connected or not, but no serial connection can be established from the python program if the serial monitor is already open.
Also worth mentioning that this hasn't always happened, its a new and annoying development
So... any ideas??
Thank you for your help!