#include <HX711.h>
#include <Servo.h> 

#define calibration_factor 7050.0 //This value is obtained using the SparkFun_HX711_Calibration sketch

#define LOADCELL_DOUT_PIN  3
#define LOADCELL_SCK_PIN  2
Servo s1;
float val = 0 ;

HX711 scale;

void setup() {
  Serial.begin(9600);
  Serial.println("HX711 scale demo");
  s1.attach(9);
  s1.write(90);
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale(calibration_factor); //This value is obtained by using the SparkFun_HX711_Calibration sketch
  scale.tare(); //Assuming there is no weight on the scale at start up, reset the scale to 0

  Serial.println("Readings:");
}

void loop() {
  Serial.print("Reading: ");
  //Serial.print(scale.get_units(), 1); //scale.get_units() returns a float
  val=scale.get_units();
  Serial.print(val);
  Serial.print(" lbs"); //You can change this to kg but you'll need to refactor the calibration_factor
  Serial.println();

  if (val > 0.1)
  {
    s1.write(90);
    delay(2000);
  }
  else
{
   s1.write(0);
}
}