// Wire Slave Receiver 

 // by Nicholas Zambetti < 
   http://www.zambetti.com 
 
 
 > 


 // Demonstrates use of the Wire library 

 // Receives data as an I2C/TWI slave device 

 // Refer to the "Wire Master Writer" example for use with this 


 // Created 29 March 2006 

 // Modified 23 June 2017 by Papaan 



 #include 
 < 
 Wire 
 . 
 h 
 > 


 void 
 setup 
 ( 
 ) 
 { 

 Wire 
 . 
 begin 
 ( 
 8 
 ) 
 ; 
 // join i2c bus with address #8 

 Wire 
 . 
 onReceive 
 ( 
 receiveEvent 
 ) 
 ; 
 // register event 

  Serial 
 
 . 
 begin 
 ( 
 115200 
 ) 
 ; 
 //Arduino IDE 1.0.6 

 //Serial.begin(230400);//Arduino IDE 1.6.7 

  Serial 
 
 . 
 println 
 ( 
 "===Recieve Start===" 
 ) 
 ; 

 } 


 void 
 loop 
 ( 
 ) 
 { 

 delay 
 ( 
 100 
 ) 
 ; 

 } 


 // function that executes whenever data is received from master 

 // this function is registered as an event, see setup() 

 char 
 c 
 ; 

 int 
 x 
 , 
 y 
 ; 


 void 
 receiveEvent 
 ( 
 int 
 howMany 
 ) 
 { 

 while 
 ( 
 2 
 < 
 Wire 
 . 
 available 
 ( 
 ) 
 ) 
 { 
 // loop through all but the last 

 c 
 = 
 Wire 
 . 
 read 
 ( 
 ) 
 ; 
 // receive byte as a character 

 if 
 ( 
 c 
 == 
 '*' 
 ) 
 { 

 break 
 ; 

 } 

  Serial 
 
 . 
 print 
 ( 
 c 
 ) 
 ; 
 // print the character 

 } 

  Serial 
 
 . 
 print 
 ( 
 " is " 
 ) 
 ; 


 if 
 ( 
 c 
 == 
 '*' 
 ) 
 { 

 //debugRegPrint 

 x 
 = 
 Wire 
 . 
 read 
 ( 
 ) 
 ; 

 y 
 = 
 Wire 
 . 
 read 
 ( 
 ) 
 ; 
 // receive byte as an integer 

 x 
 = 
 256 
 * 
 y 
 + 
 x 
 ; 

  Serial 
 
 . 
 print 
 ( 
 "0x" 
 ) 
 ; 

  Serial 
 
 . 
 println 
 ( 
 x 
 , 
 HEX 
 ) 
 ; 
 // print the integer 


 } 
 else 
 { 

 //debugPrint 

 x 
 = 
 Wire 
 . 
 read 
 ( 
 ) 
 ; 

 y 
 = 
 Wire 
 . 
 read 
 ( 
 ) 
 ; 
 // receive byte as an integer 

 x 
 = 
 256 
 * 
 y 
 + 
 x 
 ; 

  Serial 
 
 . 
 println 
 ( 
 x 
 ) 
 ; 
 // print the integer 

 } 

 }