#include <SPI.h>
#include <SD.h>
#include <Servo.h>
#define cs 4
#define pot A0
Servo myServo;
void setup() {
  Serial.begin(9600);
  myServo.attach(3);
  Serial.println("Initializing SD card...");

  if (!SD.begin(cs))
  {
      Serial.println("Initializing SD card is FAILED!");
  }
  Serial.println("The SD card is initialized successfully");
}

void loop() {
  Serial.println("Getting reading from the potentiometer");
  delay(500);
  int sensor = analogRead(pot);
  int mapped_value = map(sensor,0,1023,0,180);
  String myData = String(mapped_value);
  File myFile = SD.open("data.txt",FILE_WRITE);
  if (myFile) 
  {
    myFile.println(myData);
    myFile.close();
    Serial.println(myData);
  }
  else
  {
    Serial.println("The data.txt doesn't exist");
  }
  for (int i =3;i>=1;i--)
  {
    Serial.print("The Servo will take action after ");
    Serial.print(i);
    Serial.println(" seconds");
    delay(1000);
  }
  myFile = SD.open("data.txt",FILE_READ);
  String outData ="";
  if(myFile)
  {
    if (myFile.available())
    {
      outData = myFile.readStringUntil('\n');
      
    }
    myFile.close();
  }
  else{
    Serial.println("There is a problem with data.txt file");
    while(1);
  }
  Serial.print("The outData is ");
  Serial.println(outData);
  int out =  outData.toInt();
  myServo.write(out);
  
}