Arduino Library tutorial

This tutorial will teach you how to make a Arduino zip libary easily for any sensor

IntermediateFull instructions provided1 hour841

Things used in this project

Hardware components

Arduino UNO

SparkFun Pushbutton switch 12mm

Software apps and online services

Arduino Web Editor

The Arduino IDE will also work

Story

A library can simplify an huge Arduino code.

HOWDOES AN LIBRARY WORK?

A library has mainly 3 files and 2 extras

A Header File (.h) - This contains the library's definitions
Source Code (.cpp) - This contains the library's code
A Keyword file (.txt) - This contains the keywords used in the library
A Readme file (.txt) - This contains other information about the library (Revision Number, TODO's, etc.)
Examples (.ino) - These are to show a user how to operate the library

The purpose of my library is use a pushbutton and on and off a Led without writing a big code but just intializing the pins the button and LED connected

How to create a zip file?

Take the button.h and c++ source file and keywords txt and put it in a folder then right click and click the send to and click zip/compressed file

Code

#ifndef button_h  //ifndef and define make sure that you dont use library twice
#define button_h
#include "Arduino.h"  //Arduino.h means include all the arduino functions such as pinmode//,HIGH,LOW ETC..

class button{    //Making a  class
    public:   // 'public:' and 'private:' refer to the security of the functions and //variables listed in that set. Contents that are public can be 
	                                               //	accessed from a sketch for use, however private contents can only be
	                                               //	accessed from within the class itself.
    button(int pinone,int pintwo,int state);//pinone is button pin and pintwo is ledpin a//nd state is the state ofmthe pusbutton(HIGH or LOW)

    void work();                 //Where the code works

    private:
    int _pinone, _pintwo,_state;

};

#endif  //ending the library

#include "Arduino.h"  //include earduino functions
#include "button.h"  //include the previous file button.h

button::button(int pinone,int pintwo,int state){
    pinMode(pinone, INPUT_PULLUP);//pinmode
	pinMode(pintwo, OUTPUT);

    _pinone = pinone; //making the private variables equal to the public
	_pintwo = pintwo;
	_state = state;
}

void button::work(){                   //the code
     _state = digitalRead(_pinone);
     if (_state == LOW) {
    
    digitalWrite(_pintwo, HIGH);
  } else {
    
    digitalWrite(_pintwo, LOW);
  }

}

Arduino Library tutorial