#include <Wire.h>

const int tlacitko1 = 2;
const int tlacitko2 = 3;

int stavTlacitka1;
int stavTlacitka2;

void setup()
{
  Serial.begin(9600);
  Wire.begin();
  pinMode(tlacitko1, INPUT);
  pinMode(tlacitko2, INPUT);
}

void loop()
{
 stavTlacitka1 = digitalRead(tlacitko1);
 stavTlacitka2 = digitalRead(tlacitko2);

 if (stavTlacitka1 == HIGH) {

  Wire.beginTransmission(1);
  delay(100);
  Wire.write('a');
  delay(100);
  Wire.endTransmission();

  Serial.print("Tlacitko1 = ");
  Serial.print(stavTlacitka1);
  Serial.println(" =>");

  delay(100);


 }

 else if (stavTlacitka2 == HIGH) {

  Wire.beginTransmission(1);
  delay(100);
  Wire.write('b');
  delay(100);
  Wire.endTransmission();

  Serial.print("Tlacitko2 = ");
  Serial.print(stavTlacitka2);
  Serial.println(" =>");

  delay(100);


 }

}