#include <Wire.h>
char* time;

void setup() {
  Wire.begin(9); //start as slave on address 9
  Wire.onReceive(receiveEvent); //attach a function to trigger when something is received
  Serial.begin(9600);
}

void receiveEvent(int bytes) {
  time = Wire.read(); //read one character from the I2C

}

void loop() {
  Serial.println(time);
  delay(1000);
}

//slave