Hello, everyone, I bought a new Arduino Uno board for my project. When I was at first trying to upload the basic LCD code "Hello World" the computer is showing as no header files found even though I have kept the preferences in that address.
Here the compiler says Invalid library D:/Arduino/libraries/libraries but actually that library is present in D:/Arduino/libraries what could be the problem can someone help me out.
It's only a warning. You can just ignore it if you like. It doesn't indicate any real problem. It's just telling you that you have something in the libraries folder that's not a valid library. If you had a lot of non-libraries in that folder, it would slow down the Arduino IDE, but one or two won't make any noticeable difference.
The warning s are kind of annoying though, so if you like, you can remove the invalid libraries. If there is nothing of value in those folders, just delete them. If they contain valuable files, then move them to any other folder on your computer. You should only put Arduino libraries in the D:/Arduino/libraries folder.
Please follow the advice on posting a programming question given in Read this before posting a programming question
In particular note the advice to Auto format code in the IDE and to use code tags when posting code here as it prevents some combinations of characters in code being interpreted as HTML commands such as italics, bold or a smiley character, all of which render the code useless
