#include <WiFi.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <Arduino.h>
#include <freertos/semphr.h>

// Parâmetros blynk
#define BLYNK_TEMPLATE_ID "TMPL2TqWcl0Ir"
#define BLYNK_TEMPLATE_NAME "Projeto 4"
#define BLYNK_AUTH_TOKEN "NRNHRWe9q-FEa9WcqpK9IlNCeds8Q_0i"
#include <BlynkSimpleEsp32.h> // biblioteca do blynk

BlynkTimer timer; //timer para execução periódica do Blynk
SemaphoreHandle_t xMutexLCD;

//Parâmetros da rede
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";// nome da rede wifi virtual (o da sua casa)
char pass[] = ""; // senha

#define Led 26 // pino para ligar LED
#define temp 14 // pino para a temperatura
#define trig 4
#define echo 2

const float BETA = 3950;

float readDistanceCM() {
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  int duration = pulseIn(echo, HIGH);
  return duration * 0.034 / 2;
}

BLYNK_WRITE(V1){
  int buttonState = param.asInt();
  if (buttonState == 0){
    digitalWrite(Led, LOW);
    } else {
     digitalWrite(Led, HIGH);
  }
}


void task2(void *pvParameters){
  for ( ;; ){

    float celsius = 1 / (log(1 / (4095. / analogRead(temp) - 1)) / BETA + 1.0 / 298.15) - 273.15;   

    if (xSemaphoreTake(xMutexLCD, (TickType_t)10) == pdTRUE){
      if (celsius > 37){
        Serial.println(celsius);
        Blynk.virtualWrite(V2, "Febre T > 37");
        
      } else {
        Blynk.virtualWrite(V2, "Temperatura boa");
      }
      Blynk.virtualWrite(V3, celsius);
      vTaskDelay(1000 / portTICK_PERIOD_MS);
      xSemaphoreGive(xMutexLCD);
    }
    
    vTaskDelay(3000 / portTICK_PERIOD_MS);
     
  }
}

void task3(void *vpParameters){
  for ( ;; ){
    if (xSemaphoreTake(xMutexLCD, (TickType_t)10) == pdTRUE){
      float distance = readDistanceCM();

      Serial.print("Dist medida: ");
      Serial.println(readDistanceCM());
      Blynk.virtualWrite(V0, readDistanceCM());
      vTaskDelay(1000 / portTICK_PERIOD_MS);
    xSemaphoreGive(xMutexLCD);
  }
  vTaskDelay(3000 / portTICK_PERIOD_MS);
}
}



void setup() {
  Serial.begin(115200); 
  pinMode(Led, OUTPUT);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);

  xMutexLCD = xSemaphoreCreateMutex();


  Blynk.begin(auth, ssid, pass); // inicia blynk

  xTaskCreatePinnedToCore(
    task2, // nome da função
    "Task 2", // nome da tarefa
    4000, // Stack size
    NULL, // Parâmetros da tarefa
    1, // Prioridade
    NULL, // Task handle
    1 // Núcleo para rodar a tarefa (1)
  );

  xTaskCreatePinnedToCore(
    task3,
    "LED",
    4000,
    NULL,
    1,
    NULL,
    0
  );

  // timer.setInterval(5000L, função); // chama a função a cada 5s
}

void loop() {
  Blynk.run(); // função necessária do Blynk
  timer.run(); // reativa o timer caso já tenha disparado
}


  //void função(){
    // if (isnan(valor)) {
    //  Serial.println("Falhou ao ler o sensor");
    //  return;  
    //}
//Blynk.virtualWrite(V0, valor);
//}