Hello Johanna
Yeah, basically you could just adjust the main loop in the code to start the stirring BEFORE doing OD measurement. Or, add a new line to do a second OD measurement after the stirring has started. It wont cause any issues with the running of the device, however it will make the measurements more noisy particularly if you are doing some violent stirring since there will be so many bubbles + vortex in the way!
Harrison