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#include <SFE_BMP180.h>
#include <Wire.h>

SFE_BMP180 Basinc;

double ilkbasinc; //olculen taban basinci

void setup()
{
	Serial.begin(9600);
	
	if(Basinc.begin())
	{
		Serial.println("BMP180 basinc hata");
		while(1);
	} 
  ilkbasinc = getPressure();	

} // Buraya kadar yaptıgımız tabanbasıncı bulmak ve bu degeri saklamak

void loop()
{
  double a,P;

  P = getPressure();

  a = pressure.altitude(P,ilkbasinc);
  
  Serial.print("anlık irtifa: ");
  if (a >= 0.0) Serial.print(" "); 
  Serial.print(a,1);
  Serial.print(" metre, ");
  
  delay(50);
}

double getPressure()
{
  char status;
  double T,P,p0,a;

  status = pressure.startTemperature();
  if (status != 0)
  {

    delay(status);

    status = pressure.getTemperature(T);
    if (status != 0)
    {

      status = pressure.startPressure(3);
      if (status != 0)
      {
      
        delay(status);

        status = pressure.getPressure(P,T);
        if (status != 0)
        {
          return(P);
        }

      }

    }

  }

}