#include <TinyWire.h>



byte own_address = 55;
byte received;

void setup() {
  
  pinMode(7, OUTPUT);
  //digitalWrite(led_pin, HIGH);
  
  // config TinyWire library for I2C slave functionality
  TinyWire.begin( own_address );
  // sets callback for the event of a slave receive
  TinyWire.onReceive( onI2CReceive );
}

void loop() {
  
}


void onI2CReceive(int howMany){

  received = TinyWire.read();

  if(received==100){
  digitalWrite(7, LOW);
  }else
  if(received==200){
  digitalWrite(7, HIGH);
  }
}