#define BLYNK_TEMPLATE_ID "TMPL6jTUwEUsw"
#define BLYNK_TEMPLATE_NAME "wokwi blynk"
#define BLYNK_AUTH_TOKEN "xNhymTbn33ePjuckfc4EBcMd-Zt2qK9b"

#define BLYNK_PRINT Serial

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

#define PIN 14
#define NUM 26
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUM,PIN, NEO_GRB + NEO_KHZ800);
int r,g,b,data;

#define DHTPIN 15

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

//ultrsonic
const int trigPin = 18;
const int echoPin = 19;

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

long duration;
float distanceCm;
float distanceInch;


BlynkTimer timer;

void setup() {
  pixels.begin();  // initialize NeoPixel strip object (REQUIRED)
  Serial.begin(115200);
  dht.setup(DHTPIN, DHTesp::DHT22); // Initialize DHT sensor
  Blynk.begin(auth, ssid, pass);
  timer.setInterval(2000L, sendDHTData); // Send DHT data every 2 seconds
  timer.setInterval(1000L, DistanceData); // Send DHT data every 1 seconds

  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input

  // Start wifi - 2 parameters (ssid & password)
  WiFi.begin(ssid, pass);
  Serial.println("Connecting to WiFi");

  // Connection status
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  // Connection Info
  Serial.println("");
  Serial.println("WiFi connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
}

void DistanceData() {
  // 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);

  // Write Distance Data into Blynk 
  // 2 parameters - 1. pin #, 2. Value 
  Blynk.virtualWrite(V1, distanceCm);
}

void sendDHTData() {
  float t = dht.getTemperature();
  float h = dht.getHumidity();
  
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Blynk.virtualWrite(V2, t);
  Blynk.virtualWrite(V3, h);

  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print("%\t");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println(" °C");
}


void loop() {
  Blynk.run();
  timer.run();

}

BLYNK_WRITE(V4)
{
  data = param.asInt();
  Serial.println(data);
  if(data==0)
 {
  static1(r,g,b);
 }
 else if(data==1)
 {
  animation1(); 
 }
}
void static1(int r, int g, int b)
{
  for(int i=0;i<=NUM;i++)
  {
  pixels.setPixelColor(i, pixels.Color(r,g,b));
  pixels.show();
  }
}
void animation1()
{
  for(int i=0;i<NUM;i++)
  {
    pixels.setPixelColor(i, pixels.Color(255,0,0));
    pixels.show();
    delay(100);
  }
  for(int i=NUM;i>=0;i--)
  {
    pixels.setPixelColor(i, pixels.Color(0,255,0));
    pixels.show();
    delay(100);
  }
  for(int i=0;i<NUM;i++)
  {
    pixels.setPixelColor(i, pixels.Color(0,255,255));
    pixels.show();
    delay(100);
  }
  for(int i=NUM;i>=0;i--)
  {
    pixels.setPixelColor(i, pixels.Color(255,255,0));
    pixels.show();
    delay(100);
  }
}