Wire Library Arduino !!exclusive!! 🎯 ✨

#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

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. wire library arduino

// Request 2 bytes from slave Wire.requestFrom(0x68, 2); #include &lt;Wire

Slave (Arduino #1):

if (Wire.available() >= 2) lsb; Serial.println(data); int x = 42

void loop() // Send register address to read (e.g., 0x00) Wire.beginTransmission(0x68); // MPU6050 address Wire.write(0x00); Wire.endTransmission(false); // Send restart

void loop()