Arduino program to interface a servo motor and a button at pin 7

Write a program to interface a servo motor and a button at pin 7. On each button press, rotate the servo motor by 45 degrees incrementally until it completes a 180- degree rotation. After reaching 180 degrees, reset it to 0 degrees on the next press.

#include <Servo.h>  // Include the Servo library

Servo myServo;       // Create a Servo object
int angle = 0;       // Current angle of the servo
int lastButtonState = LOW;  // Previous button state
int buttonState;            // Current button state

void setup() {
  pinMode(7, INPUT);  // Button with internal pull-up
  myServo.attach(9);          // Attach servo to pin
  myServo.write(angle);               // Initialize servo at 0 degrees
  Serial.begin(9600);
}

void loop() {
  buttonState = digitalRead(7);

  // Detect button press (change from HIGH to LOW)
  if (buttonState == LOW && lastButtonState == HIGH) 
  {
    // Increment angle by 45 degrees
    angle += 45;

    // Reset to 0 if angle exceeds 180
    if (angle > 180) {
      angle = 0;
    }

    myServo.write(angle);  // Move servo to new angle
    Serial.print("Servo Angle: ");
    Serial.println(angle);

    delay(200); // Simple debounce delay
  }

  lastButtonState = buttonState;  // Update last button state
}