ardunio dual core - master

ardunio dual core - master

#include <Wire.h>

void setup() {
  Wire.begin(); 
}


void sendWireData(short data) {

  Wire.beginTransmission(8); // transmit to device #8
  Wire.write(data);              // sends one byte
  Wire.endTransmission();    // stop transmitting

}

void loop() {

  sendWireData(1) ; 
  delay(500);
  
  sendWireData(0); 
  delay(500) ; 


}

Slave

#define LED_PIN 3

#include <Wire.h>

void setup() {
  Wire.begin(8);                // join i2c bus with address #8
  Wire.onReceive(receiveEvent); // register event
}

void loop() {
}



void receiveEvent(int howMany) {

  char c = Wire.read(); 
  
  if (c == 1 ) {
    
    digitalWrite(LED_PIN,1) ; 
  
  } else if (c == 0) {
  
    digitalWrite(LED_PIN,0) ; 
  }
  

  
}