Auto Refilling Water Tank with Solenoid Valve and Ultrasonic Sensor

[StefanL38]

@anon11537946

I want to use millis but i still confused how to used it.

You are one of more than a thousand users that have this problem.

This problem is caused by three things:

1. not emphasizsing the very different nature of non-blocking timing based on millis() to using delay()
2. a poor documented and poor written demo-code
3. lack of an everyday analogy with easy to understand example-numbers

I claim to have written a tutorial that does it better.

Example-code for timing based on millis() easier to understand through the use of example-numbers / avoiding delay()

non-blocking timing. Execute code only from time to time. There are a lot of different ways to learn programming. This thread wants to add another approach that is different to the yet existing ones. UPDATE 06.01.2023 if you are mainly interested in applying non-blocking timing you can do a quick read of this short tutorial / demonstration If you are intersted in understanding the details how it works go on reading here. I use an everyday analogon in this post to explain the basic principle …

best regards Stefan