I’m still developing Growduino, this time it’s V2 - completely rewritten code for OrangePi (we need encrypted communication and sql database for much higher reliability). But in the mean time I’m doing a research and think about how to do software logic model properly for dosing pumps module. That’s why I created this topic 
And of course, I would like to connect it with Growduino, so users will see everything on one screen (web browser).