#include <LiquidCrystal.h>
#include "Arduino_FreeRTOS.h"
#include "task.h"
#include "semphr.h"
#include "DHT.h"

#define DHT_PIN 2
#define DHT_TYPE DHT22 
DHT dht(DHT_PIN, DHT_TYPE);
volatile float temperature, humidity;


LiquidCrystal lcd(12, 11, 10, 9, 8, 7);


SemaphoreHandle_t  xMutex;


void setup() {
  // put your setup code here, to run once:
    // put your main code here, to run repeatedly:
  Serial.begin(9600);
  lcd.begin(16, 2);
  // you can now interact with the LCD, e.g.:
  lcd.print("Hello World!");
  dht.begin();

  xTaskCreate(Task1,"Task-1", 400, NULL, 2, NULL);
  xTaskCreate(Task2,"Task-2", 200, NULL, 1, NULL);
  xTaskCreate(Idle,"Idle_Task", 100, NULL, 0, NULL);

  xMutex = xSemaphoreCreateMutex();
  vTaskStartScheduler();

}

void loop() {


}

void Task1()
{
  while(1)
  {
      Serial.println("In Task-1");
      float local_temp = dht.readTemperature();
      float local_humidity = dht.readHumidity();
      temperature = local_temp;
      humidity = local_humidity;
      vTaskDelay(10);
  }

}

void Task2()
{ 
  while(1)
  {
      Serial.println("In Task-2");
      xSemaphoreTake(xMutex, portMAX_DELAY);
      lcd.clear();
      lcd.print("Temp is ");
      lcd.print(temperature);
      lcd.setCursor(0,1);
      lcd.print("Hum is ");
      lcd.print(humidity);
      xSemaphoreGive(xMutex);
      vTaskDelay(200);
  }

}

void Idle()
{
   while(1)
  {
      Serial.println("In Idle Task"); 
      xSemaphoreTake(xMutex, portMAX_DELAY);
      lcd.clear();
      lcd.print("Welcome to PV2");
      lcd.setCursor(0,1);
      lcd.print("PlantCare Active");
      xSemaphoreGive(xMutex);
      vTaskDelay(1000);
  }

}