This gist is all about the coding of Arduino. From this gist anyone can learn how we can code an Arduino very easily. This gist will cove all the things that we need to know about the coding of Arduino.

01_basic.ino

int led = 13;
void setup() {
  pinMode(led, OUTPUT);
}

void loop() {
  digitalWrite(led, HIGH);
  delay(1000);
  digitalWrite(led, LOW);
  delay(1000);
}

02_variable.ino

// Integer Data Type
int num1 = 10;
const int num2 = 20;

// Float Data Type
const float pi = 3.1416;

// String Data Type
String myName = "John Doe";

// Character Data Type
char firstLetter = 'A';

// boolean data type
bool isBlink = false;

// Practical Use of Variable
int led = 13;

void setup() {
  Serial.begin(9600);
  pinMode(led,OUTPUT);
}

void loop() {
  Serial.print("My first number is ");
  Serial.println(num1);
  Serial.print("My second number is ");
  Serial.println(num2);
  Serial.println(pi);
  Serial.println("My name is " + myName);
  Serial.print("My first Character is ");
  Serial.println(firstLetter);
  Serial.println(isBlink);
  
  // Led ON
  digitalWrite(led,HIGH);
}

03_digital&AnalogIO.ino

int redLed = 5;
const int buttonPin = 7;
int buttonStatus;
int greenLed = A0;
int potPin = A2;
float potValue;

void setup() {
  // Set the pinMode(INPUT or OUTPUT)
  pinMode(redLed,OUTPUT);
  pinMode(buttonPin,INPUT);
  pinMode(greenLed,OUTPUT);
  pinMode(potPin,INPUT);
  Serial.begin(9600);
}

void loop() {
  // Digital Write
  digitalWrite(redLed,HIGH);
  Serial.print("RED Led ON :");
  Serial.println(redLed);
  delay(1000);
  digitalWrite(redLed,LOW);
  Serial.print("RED Led OFF :");
  Serial.println(redLed);
  delay(1000);
  
  // Digital Read
  buttonStatus = digitalRead(buttonPin);
  Serial.print("The Button Status is: ");
  Serial.println(buttonStatus);
  
  // Analog Write
  analogWrite(greenLed,255);
  delay(2000);
  analogWrite(greenLed,0);
  delay(2000);
  
  // Analog Read
  //Serial.println(potPin);
  potValue = analogRead(potPin);
  Serial.print("The pot value is: ");
  Serial.println(potValue);
}

04_serial-monitor.ino

int ledPin = 5;
void setup(){
  pinMode(ledPin,OUTPUT);
  Serial.begin(9600);
}

void loop(){
  digitalWrite(ledPin,HIGH);
  delay(1000);
}