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Wire Library

Implements I2C on Z-Uno pins 9–16. Default is 9 for SCL and 10 for SDA.
  • begin()
  • requestFrom()
  • beginTransmission()
  • endTransmission()
  • write()
  • available()
  • read()
  • onReceive()
  • onRequest()
 Default pins can be changed during I2C initialization: 
#define SCL_PIN 11
#define SDA_PIN 12

I2CDriver alternative_I2C(SCL_PIN, SDA_PIN); 

void setup() {
    // …
    Wire.bindDriver(&alternative_I2C); // This instructs to use other pins than default
    // …
}