/**
   ESP32 + DHT22 Example for Wokwi
   
   https://wokwi.com/arduino/projects/322410731508073042
*/

#include "DHTesp.h"

const int DHT_PIN = 15;

DHTesp dhtSensor;
int temperature;
int humidity;

//blynk
/*************************************************************

  This sketch shows how to write values to Virtual Pins

  NOTE:
  BlynkTimer provides SimpleTimer functionality:
    http://playground.arduino.cc/Code/SimpleTimer

  App dashboard setup:
    Value Display widget attached to Virtual Pin V5
 *************************************************************/

/* Fill-in information from Blynk Device Info here */
#define BLYNK_TEMPLATE_ID "TMPL3lzeMFgXY"
#define BLYNK_TEMPLATE_NAME "Temperature and Humidity Monitoring"
#define BLYNK_AUTH_TOKEN "UvLOTJBebGhM1wtbnVlihtWOhgR51bEy"

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial
const int trigPin = 5;
const int echoPin = 18;

//define sound speed in cm/uS
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

long duration;
float distanceCm;
float distanceInch;

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;
const int LED = 4;

// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.
void myTimerEvent()
{
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  temperature=data.temperature;
  humidity=data.humidity;

  Blynk.virtualWrite(V0, temperature);
  Blynk.virtualWrite(V1, humidity);

  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("---");

  // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);
  
  // Calculate the distance
  distanceCm = duration * SOUND_SPEED/2;
  
  // Convert to inches
  distanceInch = distanceCm * CM_TO_INCH;
  
  // Prints the distance in the Serial Monitor
  Serial.print("Distance (cm): ");
  Serial.println(distanceCm);
  Serial.print("Distance (inch): ");
  Serial.println(distanceInch);
  Blynk.virtualWrite(V3, distanceCm);
  
}

void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(LED, OUTPUT); //Set the LED (D8) as an output
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  timer.setInterval(1000L, myTimerEvent);
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
}

void loop() {
  
  Blynk.run();
  timer.run(); // Initiates BlynkTimer
  
}

// This function will be called every time button Widget
// in Blynk app writes values to the Virtual Pin V3
BLYNK_WRITE(V2) {
  Serial.print(param.asInt());
 int pinValue = param.asInt(); // Assigning incoming value from pin V3 to a variable
 if (pinValue == 1) {
    digitalWrite(LED, HIGH); // Turn LED on.
  } else {
    digitalWrite(LED, LOW); // Turn LED off.
 }
}