Arduino Wire.h Library __full__ -

// Configure sensor (simplified) Wire.beginTransmission(SENSOR_ADDR); Wire.write(0x26); // Control register Wire.write(0xB9); // Active, 128 samples, 2^8mbar max Wire.endTransmission(); delay(100);

void loop() Wire.beginTransmission(8); // Slave address 8 Wire.write("Hello Slave!"); Wire.endTransmission();

void loop() delay(100);

Try the built-in I2C scanner (File → Examples → Wire → Scanner), then hook up a cheap OLED or RTC module. You’ll be amazed at what two wires can do.

Serial.print("Pressure: "); Serial.print(pressure); Serial.print(" hPa, Temperature: "); Serial.print(temperature); Serial.println(" C"); delay(1000); arduino wire.h library

if(Wire.available() >= 5) Wire.read()) >> 4; float temperature = temp_raw * 0.0625;

// Request 5 bytes (3 pressure, 2 temp) Wire.requestFrom(SENSOR_ADDR, 5); // Configure sensor (simplified) Wire

void setup() Serial.begin(9600); Wire.begin(8); // Join I2C bus with address 8 Wire.onReceive(receiveEvent); Wire.onRequest(requestEvent);