Hall effect sensor, water flow indicator alarm

I finally start to understand a little bit!
But write the code will be impossible for a guy with a brain like me, or knowledge.

I'm seriously considering to start learning for real, it's much to read/learn and take some time,

I understand what you mean with counting pulses! But not how to start write code, or how to continue writing?

It's like writing a text in Chinese or Russian, I don't understand... :frowning: