Solar tracking Project Code Troubleshooting

Projects Programming
9

econjack:
@Delta_G: do you know an easy way to do that?

I'm not Delta_G, but my Google told me to use perhaps:
https://www.gonnalearn.com/code/remove_line_numbers_from_code.htm

The result is:

/*
 Solar Tracker
 tracks sun in two axis for solar energy applications
 requirements for built: (5V Hobby Servo [PIN9], 4 LDRs [PIN A0, A1], 4 10kOhm Resistors [Pulldown for LDR], Jumperwires), cardboard
  Copyright (C) 2012 Bernd Klein

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <Servo.h>

// 2 new servo object
Servo tiltServo;
Servo yawServo;

// define pins
// A0.. A4 for LDR and pulldown resistor
const int ldrUp = A0;
const int ldrBottom = A1;
const int ldrLeft = A2;
const int ldrRight = A3;

// define global variables
//int switchVal = 0;
int posTilt = 90;
int posYaw = 90;


void setup() {
  // attach tiltServo to digital PWM pin 9 an yawServo to digital PWM 10
  tiltServo.attach(10);
  yawServo.attach(9);
  // serial monitor with BAUD 9600 for monitoring the LDR outputs for debugging
  Serial.begin(9600);
}

void loop() {
  // goto pos (middle)
  tiltServo.write(posTilt);
  yawServo.write(posYaw);

  // save LDR values in variabels
  int ldrUpValue = analogRead(ldrUp);
  int ldrBottomValue = analogRead(ldrBottom);
  int ldrLeftValue = analogRead(ldrLeft);
  int ldrRightValue = analogRead(ldrRight);

  // print LDR variables in serial console for debug an calibration
  Serial.print("LDR Up = " );
  Serial.print(ldrUpValue);
  Serial.print("\t LDR Down = ");
  Serial.println(ldrBottomValue);

  Serial.print("\t LDR Left = " );
  Serial.print(ldrLeftValue);
  Serial.print("\t LDR Right = ");
  Serial.println(ldrRightValue);

  // wait 10 ms
  delay(10);

  // delta of LDR values
  int deltaTilt = ldrUpValue - ldrBottomValue;
  int deltaYaw = ldrLeftValue - ldrRightValue;
  // define buffer, you might use two buffers one for yaw one for tilt
  int buffer = 100;

  // TILT Loop
  // while sun nor perpendicular move by increasing pos and go to new position
  while (deltaTilt > buffer) {
    posTilt = posTilt++;
    tiltServo.write(posTilt);
    delay(50);
    break;
  }

  // while sun not perpendicular move by decreasing pos and go to new position
  while (deltaTilt < -buffer) {
    posTilt = posTilt--;
    tiltServo.write(posTilt);
    delay(50);
    break;
  }

  //YAW Loop
  // while sun nor perpendicular move by increasing pos and go to new position
  while (deltaYaw > buffer) {
    posYaw = posYaw++;
    yawServo.write(posYaw);
    delay(50);
    break;
  }

  // while sun not perpendicular move by decreasing pos and go to new position
  while (deltaYaw < -buffer) {
    posYaw = posYaw--;
    yawServo.write(posYaw);
    delay(50);
    break;
  }
}

The code compiles without errors, but Arduino 1.6.5 creates some "warnings", so perhaps the programming logic is not fully correct.