butter my bread

buttermybread

//butter machine for Arduino

#include <Servo.h> //add servo motor library

const int photoPin = A0; //input pin for photosensor
const int ledPin = 9;
int photoMin = 1023;
int photoMax = 0;
int photoValue = 1023;

Servo servoMotor;
const int servoPin = 2;
int servoAngle[]={
  30,149};

void setup(){
  Serial.begin(9600);
 
  pinMode(9, OUTPUT);
  digitalWrite(9, HIGH);

  while (millis() < 2000){
    photoValue = analogRead(photoPin);

    if (photoValue > photoMax){
      photoMax = photoValue; 
      Serial.print("photoMax = ");
      Serial.println(photoMax);
    }

    if (photoValue < photoMin){
      photoMin = photoValue;
      Serial.print("photoMin = ");
      Serial.println(photoMin);
    }
  }

  digitalWrite(9,LOW);
  servoMotor.attach(servoPin);


}

void loop(){
  
  photoValue = analogRead(photoPin);
  photoValue = map(photoValue, photoMin, photoMax, 0, 179);
  photoValue = constrain(photoValue,0,179);
  
  Serial.print("photoValue = ");
  Serial.println(photoValue);

  for(int i = 0; i < 2; i++){
    if (photoValue < 10 && millis() > 2000){
      digitalWrite(9,HIGH);
      servoMotor.write(servoAngle[i]);
        Serial.print("servoAngle = ");
        Serial.println(servoAngle[i]);
      delay(1000);
    } else {
      digitalWrite(9,LOW);
    }
  }


}