/*
online model of Arduino with AVT 1615
manual of shiels
https://serwis.avt.pl/manuals/AVT1615.pdf
project available in WOKWI ONLINE PLATFORM
https://wokwi.com/projects/359988057917665281
*/

#include <LiquidCrystal.h>
#include <stdio.h>
#include <math.h>
#include <avr/io.h>

// numeration of digital and analog pins in the AVT1615 BOARD
int ledPin10 = 10, ledPin11 = 11, ledPin12 = 12, ledPin13 = 13;    // LED connected to digital pins 10-13
int buttonPin0 = 0, buttonPin1 = 1,buttonPin2 = 2, buttonPin3 = 3;    // Buttons connected to digital pins 1-3
int sensorValue = 0, tempValue = 0;  // variable to store the value coming from the potentiometer and sensor
int potentiometerPin = A0, thermometerPin = A1;

// initialize the library by associating any LCD interface pin with the arduino pin number it is connected to
const int rs = 8, en = 9, d4 = 4, d5 = 5, d6 = 6, d7 = 7;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
char str[8];
char str2[8];

// ------------- INITIALIZATION -------------
void setup() {

  // sets the digital pins 10-13 as output and set off (value 1)
  pinMode(ledPin10, OUTPUT);    
  pinMode(ledPin11, OUTPUT);    
  pinMode(ledPin12, OUTPUT);    
  pinMode(ledPin13, OUTPUT);    
  digitalWrite(ledPin10, 1);    
  digitalWrite(ledPin11, 1);
  digitalWrite(ledPin12, 1);
  digitalWrite(ledPin13, 1);

  // sets the digital pins 0-3 as input
  pinMode(buttonPin0, INPUT);
  pinMode(buttonPin1, INPUT);
  pinMode(buttonPin2, INPUT);
  pinMode(buttonPin3, INPUT);
  pinMode(potentiometerPin, INPUT);

  // initialize screen and print a "hello, world!" message to the LCD.
  lcd.begin(16, 2);
  lcd.print("hello, world!");
  delay(1000);

  // initialize Serial (UART) communication
  Serial.begin(9600);

}

// ------------- OPERATION N THE LOOP -------------
void loop() {

  // TASK 0
  // set all LEDs in the board one by one
  // https://www.arduino.cc/reference/en/language/functions/digital-io/digitalread/  
  if (!digitalRead(buttonPin0)){
    // set all LEDs in the board one by one
    digitalWrite(ledPin10, 0);    
    digitalWrite(ledPin11, 1);
    digitalWrite(ledPin12, 1);
    digitalWrite(ledPin13, 1);
    delay(250);
    digitalWrite(ledPin10, 1);    
    digitalWrite(ledPin11, 0);
    digitalWrite(ledPin12, 1);
    digitalWrite(ledPin13, 1);
    delay(250);
    digitalWrite(ledPin10, 1);    
    digitalWrite(ledPin11, 1);
    digitalWrite(ledPin12, 0);
    digitalWrite(ledPin13, 1);
    delay(250);
    digitalWrite(ledPin10, 1);    
    digitalWrite(ledPin11, 1);
    digitalWrite(ledPin12, 1);
    digitalWrite(ledPin13, 0);
    delay(250);    
  }

  // TASK 1
  // fade out from max to min in increments of 5 points
  // fade in from min to max in increments of 5 points
  // https://docs.arduino.cc/built-in-examples/analog/Fading
  else if(!digitalRead(buttonPin1)){
    // fade out from max to min in increments of 5 points
    for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -= 5) {
      // decrerase the value (range from 255 to 0):
      analogWrite(ledPin10, fadeValue);
      analogWrite(ledPin11, fadeValue);
      analogWrite(ledPin12, fadeValue);
      analogWrite(ledPin13, fadeValue);
      delay(30);
    }
    // fade in from min to max in increments of 5 points
    for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 5) {
      // increase the value (range from 0 to 255):
      analogWrite(ledPin10, fadeValue);
      analogWrite(ledPin11, fadeValue);
      analogWrite(ledPin12, fadeValue);
      analogWrite(ledPin13, fadeValue);
      delay(30);
    }
  }

  // TASK 2
  // display the name and city on the screen
  // https://docs.arduino.cc/learn/electronics/lcd-displays  
  // display the name and city with serial communication
  // https://docs.arduino.cc/software/ide-v2/tutorials/ide-v2-serial-monitor
  else if (!digitalRead(buttonPin2)){
    // display the name and city on the screen
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("PAWEL KROL");
    lcd.setCursor(0, 1);
    lcd.print("KRAKOW");  
    // display the name and city with serial communication
    Serial.println("PAWEL KROL");   
    Serial.println("KRAKOW");
    delay(100);
  }

  // TASK 3
  // read the value from the potentiometer and output to the LED proportional to the value read
  // https://www.arduino.cc/reference/en/language/functions/analog-io/analogwrite
  // display the measurement on the screen
  // https://docs.arduino.cc/learn/electronics/lcd-displays
  // send the measurement with serial communication
  // https://docs.arduino.cc/software/ide-v2/tutorials/ide-v2-serial-monitor
  else if (!digitalRead(buttonPin3)){
    // read the value from the potentiometer and output to the LED proportional to the value read
    sensorValue = analogRead(potentiometerPin);
    analogWrite(ledPin10, (int)(sensorValue/1024.0*256.0));
    //analogWrite(ledPin10, (int)(pow(sensorValue/1024.0, 1/2.2)*256.0));   // gamma correction https://www.scantips.com/lights/gamma2.html
    // display the measurement on the screen
    lcd.clear();
    lcd.setCursor(0, 1);
    lcd.print(sensorValue);
    // send the measurement with serial communication
    Serial.println(sensorValue);    
    delay(100);
  }

  // IDDLE TASK 
  // read the value from the LM35 temperature sensor
  // display the measurement on the screen
  // send the measurement with serial communication
  else{
    tempValue = analogRead(thermometerPin);
	  // display the measurement on the screen
    lcd.clear();
    lcd.setCursor(0, 0);
    sprintf(str, "ADC: %d", tempValue);
    lcd.print(str);
    lcd.setCursor(0, 1);
    dtostrf((float)tempValue/1024.0*5.0*100.0, 2, 2, str);     // https://www.programmingelectronics.com/dtostrf/
    sprintf(str2, "TMP: %s", str);                             // https://docs.arduino.cc/built-in-examples/strings/StringAdditionOperator
    lcd.print(str2);         
    // send the measurement with serial communication
    Serial.println(str2);    
    delay(100);
  }
  
}