// Definindo pinos e variáveis
int sensor = 34;
int chave = 32;
int bg_19 = 19;
int bg_18 = 18;
int bg_5 = 5;
int bg_17 = 17;
int bg_16 = 16;
int bg_4 = 4;
int bg_0 = 0;
int bg_2 = 2;
int l_26 = 26;
int l_25 = 25;
int leitura = 0;
int comando = 0;
boolean lchave = 0;
boolean mostrarTemperatura = 0;
float BETA = 3950;
float temp = 0;

void setup() {
  Serial.begin(115200);
  Serial.println("Digite '1' para exibição da temperatura e '0' para encerrar exibição");
  pinMode(sensor, INPUT);
  pinMode(chave, INPUT);
  pinMode(bg_19, OUTPUT);
  pinMode(bg_18, OUTPUT);
  pinMode(bg_5, OUTPUT);
  pinMode(bg_17, OUTPUT);
  pinMode(bg_16, OUTPUT);
  pinMode(bg_4, OUTPUT);
  pinMode(bg_0, OUTPUT);
  pinMode(bg_2, OUTPUT);
  pinMode(l_26, OUTPUT);
  pinMode(l_25, OUTPUT);
}

void loop() {
 leitura = analogRead(sensor);
 temp = 1/(log(1/(4095.0/leitura -1.0))/BETA +1.0/298.15) -273.15;
 lchave = digitalRead(chave);
 comando = Serial.read();
// Informações do Serial
 if (Serial.available() > 0){
  if (comando == '1') {
      mostrarTemperatura = 1;
      } 
    else if (comando == '0') {
      mostrarTemperatura = 0;
    }
 }
 if(mostrarTemperatura){
  Temperaturaterminal();
 }
//LEDs indicadores
 if(lchave&temp > 50.00){
  ledvermelho();
 }
 else{
  l_off();
 }
 if(lchave&temp < 35.00){
  ledazul();
 }
 else{
  l_off();
 }
// Bargraph indicador de temperatura
 if(temp < 10){
  zero();
 }
 if(temp > 10.0){
  um();
 }
 if(temp > 20.0){
  dois();
 }
 if(temp > 30.0){
  tres();
 }
 if(temp > 40.0){
  quatro();
 }
 if(temp > 50.0){
  cinco();
 }
 if(temp > 60.0){
  seis();
 }
 if(temp > 70.0){
  sete();
 }
 if(temp > 79.0){
  oito();
 }
}
// Funções para o estado da bargraph
void zero(){
  digitalWrite(bg_19, LOW);
  digitalWrite(bg_18, LOW);
  digitalWrite(bg_5, LOW);
  digitalWrite(bg_17, LOW);
  digitalWrite(bg_16, LOW);
  digitalWrite(bg_4, LOW);
  digitalWrite(bg_0, LOW);
  digitalWrite(bg_2, LOW);
}

void um(){
  digitalWrite(bg_19, HIGH);
  digitalWrite(bg_18, LOW);
  digitalWrite(bg_5, LOW);
  digitalWrite(bg_17, LOW);
  digitalWrite(bg_16, LOW);
  digitalWrite(bg_4, LOW);
  digitalWrite(bg_0, LOW);
  digitalWrite(bg_2, LOW);
}

void dois(){
  digitalWrite(bg_19, HIGH);
  digitalWrite(bg_18, HIGH);
  digitalWrite(bg_5, LOW);
  digitalWrite(bg_17, LOW);
  digitalWrite(bg_16, LOW);
  digitalWrite(bg_4, LOW);
  digitalWrite(bg_0, LOW);
  digitalWrite(bg_2, LOW);
}

void tres(){
  digitalWrite(bg_19, HIGH);
  digitalWrite(bg_18, HIGH);
  digitalWrite(bg_5, HIGH);
  digitalWrite(bg_17, LOW);
  digitalWrite(bg_16, LOW);
  digitalWrite(bg_4, LOW);
  digitalWrite(bg_0, LOW);
  digitalWrite(bg_2, LOW);
}

void quatro(){
  digitalWrite(bg_19, HIGH);
  digitalWrite(bg_18, HIGH);
  digitalWrite(bg_5, HIGH);
  digitalWrite(bg_17, HIGH);
  digitalWrite(bg_16, LOW);
  digitalWrite(bg_4, LOW);
  digitalWrite(bg_0, LOW);
  digitalWrite(bg_2, LOW);
}

void cinco(){
  digitalWrite(bg_19, HIGH);
  digitalWrite(bg_18, HIGH);
  digitalWrite(bg_5, HIGH);
  digitalWrite(bg_17, HIGH);
  digitalWrite(bg_16, HIGH);
  digitalWrite(bg_4, LOW);
  digitalWrite(bg_0, LOW);
  digitalWrite(bg_2, LOW);
}

void seis(){
  digitalWrite(bg_19, HIGH);
  digitalWrite(bg_18, HIGH);
  digitalWrite(bg_5, HIGH);
  digitalWrite(bg_17, HIGH);
  digitalWrite(bg_16, HIGH);
  digitalWrite(bg_4, HIGH);
  digitalWrite(bg_0, LOW);
  digitalWrite(bg_2, LOW);
}
 void sete(){
  digitalWrite(bg_19, HIGH);
  digitalWrite(bg_18, HIGH);
  digitalWrite(bg_5, HIGH);
  digitalWrite(bg_17, HIGH);
  digitalWrite(bg_16, HIGH);
  digitalWrite(bg_4, HIGH);
  digitalWrite(bg_0, HIGH);
  digitalWrite(bg_2, LOW);
 }

 void oito(){
  digitalWrite(bg_19, HIGH);
  digitalWrite(bg_18, HIGH);
  digitalWrite(bg_5, HIGH);
  digitalWrite(bg_17, HIGH);
  digitalWrite(bg_16, HIGH);
  digitalWrite(bg_4, HIGH);
  digitalWrite(bg_0, HIGH);
  digitalWrite(bg_2, HIGH);
 }

//Funções estado dos LEDs
void ledvermelho(){
  digitalWrite(l_25, HIGH);
  digitalWrite(l_26, LOW);
}
void ledazul(){
  digitalWrite(l_25, LOW);
  digitalWrite(l_26, HIGH);
}
void l_off(){
  digitalWrite(l_25, LOW);
  digitalWrite(l_26, LOW);
}

// Função da amostragem no serial
void Temperaturaterminal(){
 Serial.print("Temperatura:");
 Serial.print(temp);
 Serial.println(" °C");
}