I have a LPC1768 that is using PID for motor speed control and it can live chart to a mac (should work on a pc) using python to do the live charting.
I write to the serial output.
If you want to see this work on a mbuino just let me know. I will write a post and show the code. It will take a few days because of work. I’m 99% sure I can get this working on my mac now that I can code and load firmware on the mbuino from my mac.