Arduino | Wire Library

if (Wire.available() >= 2) lsb; Serial.println(data);

Slave (Arduino #1):

#include <Wire.h> int x = 42; void setup() Wire.begin(0x08); // Join bus as slave at address 0x08 Wire.onRequest(sendData); // Call function when master requests wire library arduino

void loop()

For 90% of I2C projects, Wire is all you need. For advanced needs (multi-master, >32-byte transactions, non-blocking), consider platform-specific I2C libraries. if (Wire

#include <Wire.h> void setup() Serial.begin(9600); Wire.begin(); if (Wire.available() &gt

delay(100);