Matrix user forums

Hi, Can someone please help with designing a door monitoring system

Hi Kevin,
Welcome to the Matrix forums.
My advice would be to learn how to use Flowcode first.
Have a look at the getting started guide within the Learning centre
As you are on the Matrix forums, I'm assuming you are using Flwocode V8?
If that is not the case, then what version of Flowocde are you using?

When you have finished with the getting started guide, can you post the full specifications including hardware.
We can then sort something out between us.