//bibliteca display
#include <LiquidCrystal.h>
byte temp1[8] = { B00100, B00100, B00100, B00100, B00100, B01110, B01110, B01110 };
byte sadFace1[8] = { B00000, B00000, B01010, B00000, B01110, B10001, B00000, B00000 };
byte happyFace1[8] = { B00000, B00000, B01010, B00000, B10001, B01110, B00000, B00000 };
byte midFace1[8] = { B00000, B00000, B01010, B00000, B00000, B01110, B00000, B00000 };
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

//biblioteca DHT
#include <DHT.h>
#define DHTPIN 13
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

//pinos led e buzzer
int redPin = 12; 
int yellowPin = 11; 
int greenPin = 10;
int buzzer = 9;
float temp;
float ph;

void setup() {
  //iniciando os dispositivos
  Serial.begin(9600);
  lcd.begin(16, 2);
  dht.begin();
  
  //randomizador para o valor do ph
  randomSeed(analogRead(0));
  
  //configuracao da pinagem dos LEDs e Buzzer
  pinMode(redPin, OUTPUT); 
  pinMode(yellowPin, OUTPUT); 
  pinMode(greenPin, OUTPUT); 
  pinMode (buzzer, OUTPUT);

  //animacao de inicio
  lcd.begin(16,2);              
  lcd.clear();                  
  lcd.setCursor(5,0);           
  lcd.print("Global");    
  lcd.setCursor(5,1);           
  lcd.print("Solution");
  delay(5000);
  lcd.clear();

  //criacao dos Chars customizados para o lcd
  lcd.createChar(0, temp1);
  lcd.createChar(1, sadFace1);
  lcd.createChar(2, happyFace1);
  lcd.createChar(3, midFace1);
}

int gerarValorAleatorio() {
  // Gera um número aleatório entre 1 e 15
  return random(1, 15);
}

void loop() {

  float mediaTemp = 0;
  float mediaPh = 0;

  //funcao para media dos valores de temp e ph
  for(int i = 0; i < 10; i++) {
    
    temp = dht.readTemperature();
    ph = gerarValorAleatorio();
    
    mediaTemp += temp;
    mediaPh += ph;

    delay(500);
  }

  temp = mediaTemp / 10;
  ph = mediaPh / 10;

  //desligando os LEDs e Buzzer
  digitalWrite(greenPin, LOW);
  digitalWrite(yellowPin, LOW);
  digitalWrite(redPin, LOW);
  noTone(buzzer);

  //enviando informacoes para o terminal
  Serial.print("temp: ");
  Serial.print(temp);
  Serial.println(" C");

  Serial.print("ph: ");
  Serial.println(ph);

  delay(500);

  //estrutura condicional para os LEDs e buzzer
  if (7 <= ph && ph <= 9 && temp <= 26) {
    digitalWrite(greenPin, HIGH);
    digitalWrite(yellowPin, LOW);
    digitalWrite(redPin, LOW);
    delay(300);
  }

  if (ph >= 10 || temp >= 27) {
    digitalWrite(redPin, HIGH);
    digitalWrite(yellowPin, LOW);
    digitalWrite(greenPin, LOW);
    tone(buzzer,200,3000);
    delay(3000);
    noTone(buzzer);
    delay(1000);
  }

  if (ph <= 6) {
    digitalWrite(yellowPin, HIGH);
    digitalWrite(greenPin, LOW);
    digitalWrite(redPin, LOW);
    delay(300);
    tone(buzzer,800,3000);
    delay(3000);
    noTone(buzzer);
    delay(1000);
  }

  //colocando os chars no display 
  lcd.noDisplay();
  delay(500);
  lcd.display();
  lcd.setCursor(5, 0);  
  lcd.write(byte(0));
  lcd.setCursor(11, 0);  
  lcd.write("ph");

  delay(2000);

  //estrutura condicional para o estado do ph e temp
  if (temp <= 26) {
    lcd.setCursor(5, 1);
    lcd.write(byte(2));
  } else if (temp >= 27) {
    lcd.setCursor(5, 1);
    lcd.write(byte(1));
  }

    if (ph <= 6) {
    lcd.setCursor(11, 1);
    lcd.write(byte(3));
  } else if (7 <= ph && ph <= 9) {
    lcd.setCursor(11, 1);
    lcd.write(byte(2));
  } else if (ph >= 10) {
    lcd.setCursor(11, 1);
    lcd.write(byte(1));
  }
}