Good morning I have a problem that is a headache for me I hope you understand, What I try is to create a library from scratch and read and seen most of videos and documentation that is on the internet, I can not understand or be able to make a I hope they help me to create a library that only shows a message that says "Hello World" in the serial port and give me the code if they are so kind and it would not be bad that they can explain it to me. I insist I know of many programming languages and realize this has made me a problem. I just need the code of the 3 parts so I can analyze it and understand it. I wait for your help

Good morning. I have a problem that I hope you understand. I'm trying to create a library from scratch. I've read and watched most videos and documentation that are on the internet. I can not understand and I'm not able to make one.

I hope someone can help me create a library that only shows a message that says "Hello World" in the serial port and give me the code if they are so kind. Also, it would be good if they could explain it to me.

I insist I know of many programming languages and realize this has made me a problem. I just need the code of the 3 parts so I can analyze it and understand it. I wait for your help.