How to send data from mit app(in my mobile phone) to arduino

Projects Programming
1

Hi everyone,

I have been working a project but I have never used mit app creater. Although I am looking for something about that, I could find like this.

I want to create a text book in my app and a button. When I press the button , it must send to arduino.
Afterthat I will use data(number) to change a delay time or control LED. Something like that.

I have already tried something that it showed under the page.

2

Did you have an Arduino programming question? This is NOT the MIT app forum.