burakozen:
thanks for replying , so you say i dont need to change anything(slave or master ) , i 'll try to get data from sensor and assignment a variable , then define in Processing sketch and display it how ever I want . im right ?
As far as Arduino is concerned, at most it is
Get sensorReading;
var = sensorReading;
Serial.println (var);
or the like. No master needed.