Hello, I’m trying to figure out a few things with Arduino hooked up to Parallax reader but got stuck on some code. Tried to look at Arduino help/reference doesn’t give me much hope. I guess this is completely beginner inexperience not to say lack of knowledge and if anyone can spare a few minutes to clarify that for me, I would be grateful. What is the difference between the following variable declarations:
String keyCode; String accessList[NumberOfKeys];
I can see two arrays have been allocated but what is basically confusing me is string and char. What is the difference between them?
keyCode = code;
keyCode = keyCode.substring(0,10);
What is happening here, keyCode variable has been assigned code value, why we need the next line of code with keyCode.substring(0,10)?
Thank you very much in advance, Tom