int buttonpin = 7;
int ledpin=8;
int last_state = HIGH;
void setup()
{
 Serial.begin(115200);
 pinMode(buttonpin, INPUT_PULLUP);
 pinMode(ledpin,OUTPUT);
}


void loop()
{
  int value = digitalRead(buttonpin);
 

if (last_state != value)
{
  last_state=value;
  if (value == HIGH)
  {
digitalWrite(ledpin,LOW);
Serial.println(" released");
//Serial.println(“LED is ON, Button pressed”);
}
else
{
digitalWrite(ledpin,HIGH);
Serial.println(" pressed");
//Serial.println(“LED is OFF, Button released”);
}
}
}