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

#define BLYNK_TEMPLATE_ID "TMPL2dJBoN1Rh"
#define BLYNK_TEMPLATE_NAME "Aula 4"
#define BLYNK_AUTH_TOKEN "nkYKZ-U_USPlQRbgPY_Ar0cWh1lA1ArJ"

#include <BlynkSimpleEsp32.h>


char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";


#define PIN_GAS  34
#define PIN_TEMP 33
#define PIN_RELE 18
#define ALERTA 2

#define BETA 3950.0       // constante do termistor
#define TEMP_INI 25.0

volatile float valor_temp = 0;
volatile int valor_gas = 0;
volatile bool alertaSilenciado = false;

const float BETA = 3950;
const float TEMP_INI = 25.0;

float valor_temp; 


SemaphoreHandle_t semaforoLCD;


void TaskSensorGas(void *pvParameters);
void TaskSensorTemp(void *pvParameters);
void Taskserial(void *pvParameters);


void setup() {
  Serial.begin(115200);

  Blynk.begin(auth, ssid, pass);

  semaforoLCD = xSemaphoreCreateMutex();
  xSemaphoreGive(semaforoLCD);

  analogSetAttenuation(ADC_11db);

  pinMode(PIN_RELE, OUTPUT);
  digitalWrite(PIN_RELE, LOW);

  xTaskCreatePinnedToCore(TaskSensorGas, "GasTask", 10000, NULL, 1, NULL, 0);
  xTaskCreatePinnedToCore(TaskSensorTemp, "TempTask", 10000, NULL, 1, NULL, 1);
  xTaskCreate(Taskserial, "IHM_Task", 10000, NULL, 2, NULL);
}


void TaskSensorGas(void *pvParameters) {
  for (;;) {
    int adc = analogRead(PIN_GAS);

    if (xSemaphoreTake(semaforoLCD, (TickType_t)5) == pdTRUE) {

    if (valor_gas > 1800) {
      digitalWrite(PIN_RELE, HIGH);
      digitalWrite(ALERTA, HIGH);           
    } else {
      digitalWrite(PIN_RELE, LOW);
      digitalWrite(ALERTA, LOW);     
    }


      Blynk.virtualWrite(V1, valor_gas);

      xSemaphoreGive(semaforoLCD);
    }

    vTaskDelay(pdMS_TO_TICKS(400));
  }
}


void TaskSensorTemp(void *pvParameters) {
  for (;;) {
    int analogValue = analogRead(PIN_TEMP);

    if (xSemaphoreTake(semaforoLCD, (TickType_t)5) == pdTRUE) {

      float celsius = 1.0 / (log(1.0 / (4095.0 / analogValue - 1.0)) / BETA +
                      1.0 / (273.15 + TEMP_INI)) - 273.15;

      valor_temp = celsius;


      Blynk.virtualWrite(V2, valor_temp);

      xSemaphoreGive(semaforoLCD);
    }

    vTaskDelay(pdMS_TO_TICKS(600));
  }
}


void Taskserial(void *pvParameters) {
  for (;;) {
    int adc = analogRead(PIN_GAS);

    valor_gas = map(adc, 0, 4095, 400, 5000);

    Serial.printf("PPM: %d | Core: %d\n", valor_gas, xPortGetCoreID());
    Serial.printf("TEMP %.1f C | Core: %d\n", valor_temp, xPortGetCoreID());

    vTaskDelay(pdMS_TO_TICKS(100));
  }
}



void loop() {
  Blynk.run();

}