Przycisk 1

#define LED  7
#define button 4

boolean oldSwitchState = HIGH;
boolean newSwitchState = HIGH;
boolean LEDstatus = LOW;

void setup()
{
    Serial.begin ( 115200 );
    Serial.print("Sketch:   ");   Serial.println(__FILE__);
    Serial.print("Uploaded: ");   Serial.println(__DATE__);
    Serial.println(" ");

    pinMode(LED, OUTPUT);
    digitalWrite(LED,LOW);

    pinMode(button, INPUT);
}

void loop()
{
    newSwitchState = digitalRead(button);

    if ( newSwitchState != oldSwitchState )
    {
       // has the button switch been closed?
       if ( newSwitchState == HIGH )
       {
           if ( LEDstatus == LOW ) { digitalWrite(LED, HIGH);  LEDstatus = HIGH; }
           else                    { digitalWrite(LED, LOW);   LEDstatus = LOW;  }
       }
       oldSwitchState = newSwitchState;
    }
}