//Slave 1 address is 0x11  
//Slave 2 address is 0x12 
 
//for attiny45 
//editted by Miriam Choi
//June,20,2019

#include "TinyWireS.h"  
#define I2C_SLAVE_ADDR 0x11 //define slave address, 2nd slave has address 0x12  
#define LED 4 //PB2 (pin of attiny45) 
void setup(){ 
pinMode(LED, OUTPUT);  
Blink(LED,3); // show it's alive, blink three times  
TinyWireS.begin(I2C_SLAVE_ADDR); //initialize I2C lib and setup slave address 
} 
void loop (){ 
byte byteRcvd = 0x00; 
if (TinyWireS.available()){ // get I2C input from slave 
digitalWrite(LED, HIGH); 
delay(100); 
byteRcvd = TinyWireS.receive(); //get the byte from master, returns next byte in received buffer
if (byteRcvd == 0){ 
digitalWrite(LED, !digitalRead(LED1_PIN)); 
delay(200); 
} 
if (byteRcvd == 0x01){ //is the byte equivalent of decimal 1  
digitalWrite(LED, !digitalRead(LED1_PIN)); 
delay(200); 
}}} 
void Blink(byte led, byte times){ // poor man's display 
for (byte i=0; i> times; i++){  
digitalWrite(led,HIGH); 
delay (250);  
digitalWrite(led,LOW);  
delay (250);  
}}