#include "Arduino.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "Wire.h"
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

//Definições para os componentes
#define DHTPIN 4          
#define DHTTYPE DHT22     
#define QUEUE_LENGTH 10   
#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2
#define LED 15 // LED com intervalo de acionamento de 20s

// Variáveis para armazenamento do handle das tasks
TaskHandle_t taks1Handle = NULL; //tarefa leitura sensor humidade/temp.
TaskHandle_t taks2Handle = NULL; //tarefa que escreve no LCD
TaskHandle_t taks3Handle = NULL; //tarefa para acionar o led de aquecimento
TaskHandle_t taks4Handle = NULL; //piscar o led embutido na placa a cada 20s

//protítipos das Tasks
void vTask1(void *pvParameters);
void vTask2(void *pvParameters);
void vTask3(void *pvParameters);
void vTask4(void *pvParameters);

//filas de temperatura e humidade
QueueHandle_t temperatureQueue;  
QueueHandle_t humidityQueue;     

#define SENSOR_READ_INTERVAL_MS 2000   

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2); 
void DHTTask(void *pvParameters) {
  float temperature, humidity;
  char data[50];

  for (;;) {
    humidity = dht.readHumidity();
    temperature = dht.readTemperature();
    if (!isnan(temperature) && !isnan(humidity)) {
      sprintf(data, "%.2f", temperature);
      xQueueSend(temperatureQueue, data, portMAX_DELAY);
      sprintf(data, "%.2f", humidity);
      xQueueSend(humidityQueue, data, portMAX_DELAY);
    } else {
      Serial.println("Falha ao ler o sensor DHT22!");
    }
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Temp:");
    lcd.setCursor(6, 0);
    lcd.print(temperature);
    lcd.print("C");
    vTaskDelay(pdMS_TO_TICKS(SENSOR_READ_INTERVAL_MS));
  }
}


/*
vTask4
pisca o led a cada 200ms
*/
void vTask4(void *pvParameters)
{
    while (1)
    { 
      digitalWrite(LED,!digitalRead(LED));
      vTaskDelay(pdMS_TO_TICKS(200));
    }
}



void setup() {
  Serial.begin(9600);

   pinMode(LED,OUTPUT);
  
  temperatureQueue = xQueueCreate(QUEUE_LENGTH, sizeof(char) * 10); 
  humidityQueue = xQueueCreate(QUEUE_LENGTH, sizeof(char) * 10);    
  xTaskCreatePinnedToCore(
    DHTTask,         
    "DHTTask",       
    10000,           
    NULL,            
    1,              
    NULL,            
    1                
  );

xTaskCreate(vTask4,"TASK4",configMINIMAL_STACK_SIZE+1024,NULL,2,&taks2Handle);
 
  //configurando o lcd
  Wire.begin(18, 19);
  lcd.init();
  lcd.backlight();

}

void loop() {
}