// Receiver
#include <Wire.h>

#define I2C_ADDRESS 1

const int ledPin1 = D0;
const int ledPin2 = D6;
const int ledPin3 = D7;

void setup() {
  Wire.begin(I2C_ADDRESS);
  Wire.onReceive(receiveEvent);

  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  
  Serial.begin(9600);
  Serial.println("Receiver ready");
}

void loop() {
}

void receiveEvent(int howMany) {
  Serial.println("Data received");
  while (Wire.available()) {
    byte value = Wire.read();
    Serial.print("Received value: ");
    Serial.println(value);
    if (value == 1) {
      blinkLeds();
    }
  }
}

void blinkLeds() {
  Serial.println("Blinking LEDs");
  for (int i = 0; i < 3; i++) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3, HIGH);
    delay(500);
    digitalWrite(ledPin1, LOW);
    digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin3, LOW);
    delay(500);
  }
}