#include <OneWire.h>

OneWire ds(A0); 

byte data[12]; // buffer for data
byte address[8]; // 64 bit device address

void setup(void)
{
  Serial.begin(9600);
  if (ds.search(address)) 
  {
    Serial.println("Slave device found!");
    for (int i = 0; i < 9; i++) Serial.print(address[i], DEC);
    
  }
  else 
  {
    Serial.println("Slave device not found!");
  }
}

void loop() {}