//original code by Luis Diaz
//Fab Academy 2022
//Fab Lab León
//ATtiny412 master I2C
//Gothen from http://fabacademy.org/2020/labs/leon/students/adrian-torres/week14.html
// Lightly edited by Hafey
#include <Wire.h>

int i = 0;
int j = 0;

int led = 4; //led pin

void setup() {
  Serial.begin(115200); //speed of the communications
  Wire.begin();

  pinMode(led, OUTPUT); // led
}

void loop()
{

  for (i = 0; i < 5; i++) { // 0,1,2,3

    Wire.beginTransmission(1); //slave number 1
    if ( i == 1) {
      Wire.write(1);
      Serial.println("1");
    } else {
      Wire.write(0);
      Serial.println("0");
    }
    Wire.endTransmission();

    Wire.beginTransmission(2); //slave number 2
    if ( i == 2) {
      Wire.write(2);
      Serial.println("2");
    } else {
      Wire.write(0);
      Serial.println("00");
    }
    Wire.endTransmission();

 Wire.beginTransmission(3); //slave number 3
    if ( i == 3) {
      Wire.write(3);
      Serial.println("3");
    } else {
      Wire.write(0);
      Serial.println("000");
    }
    Wire.endTransmission();
 Wire.beginTransmission(4); //slave number 4
    if ( i == 4) {
      Wire.write(4);
      Serial.println("4");
    } else {
      Wire.write(0);
      Serial.println("0000");
    }
    Wire.endTransmission();

    for (j = 0; j <= i; j++) { // blink i times
      digitalWrite(led, HIGH);
      delay(200);
      digitalWrite(led, LOW);
      delay(200);
    }

    delay(1000);
  }

}