#include <TinyWireS.h>

#define I2C_SLAVE_ADDR  0x26              // I2C adress
const int ledPin = 3;                     // LED pin n°

byte byteRcvd;

void setup(){
  pinMode(ledPin, OUTPUT);              // LED as output
  digitalWrite(ledPin, LOW);            // set initial LED state
  
  TinyWireS.begin(I2C_SLAVE_ADDR);      // initialize I2C lib & setup slave's address
  byteRcvd = 0;
}

void loop(){
  digitalWrite(ledPin, LOW);
  if (TinyWireS.available()){           // if receiving from I2C bus
    byteRcvd = TinyWireS.receive();     // store it
    if (byteRcvd != 0) {
//    Blink LED
      digitalWrite(ledPin, HIGH);
      delay(1000);
      digitalWrite(ledPin, LOW);
      delay(1000);
      byteRcvd = 0;
    }
  }
}