I2C: two channels, address(who to talk to)

some sensor can find address in the pdf document file: //0x60 //hexadecimal to decimal converter

#inclue <Wire.h>  //Wire example in library of Adruino

void setup(){
  Serial.begin(9600);
  Wire.begin( );  //I am the sender without address
}

void loop(){
 Wire.beginTransmission(44); //w
 Wire.endTransmission(); //end transmission
}

SPI:

Serial: always on the same line