Wire.h Library May 2026

void receiveEvent(int bytes) while(Wire.available()) char c = Wire.read(); Serial.print(c);

void requestEvent() Wire.write("Hello from slave");

void setup() Wire.begin(); Serial.begin(9600); Serial.println("Temperature Monitor"); wire.h library

return -999;

delay(1000);

for(address = 1; address < 127; address++) Wire.beginTransmission(address); error = Wire.endTransmission();

void loop() float temp = readTemperature(); Serial.print("Temperature: "); Serial.print(temp); Serial.println("°C"); delay(1000); void receiveEvent(int bytes) while(Wire

Always add pull-up resistors (2.2kΩ to 10kΩ) on both SDA and SCL lines to 3.3V or 5V. Basic Functions Master Mode (Most Common) #include <Wire.h> void setup() Wire.begin(); // Join I2C bus as master Serial.begin(9600);