#include <DHTesp.h>
#include <WiFi.h>
#include "ThingSpeak.h"
const int dhtpin = 27;
TempAndHumidity data;
DHTesp dhtsensor;
const int trig =14;
const int echo = 12;
const int blue =32;
const int red = 18;
const int green = 16;
const int buzzer = 4;
int buzz_value;
float distance;
float duration;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient Client;
unsigned long mychannel_number =2603252;
const char* WriteKey = "N8Z1UG56SNSC35JU";
int statusCode;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  dhtsensor.setup(dhtpin,DHTesp::DHT22);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(Client);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);
  pinMode(buzzer, OUTPUT);

}

void getwifi()
{
  if(WiFi.status()!= WL_CONNECTED)
  {
    Serial.println("attemping to connect");
    while(WiFi.status()!= WL_CONNECTED)
    {
      WiFi.begin(ssid,pass);
      Serial.println(".");
      delay(6000);
    }
  }
  Serial.println("\n connected");
}

float getdistance()
{
  digitalWrite(trig,LOW);
  delayMicroseconds(4);
  digitalWrite(trig, HIGH);
  delayMicroseconds(100);
  digitalWrite(trig, LOW);
  duration = pulseIn(echo,HIGH);
  return(duration*0.034/2);
}
void redlight()
{
  if(distance >= 100)
  {
    tone(buzzer,1200);
    digitalWrite(red,HIGH);
    buzz_value = 1;
  }
  else
  {
    noTone(buzzer);
    digitalWrite(red, LOW);
    buzz_value = 0;
  }
  delay(10);
}
void bluelight()
{
  if(data.humidity <= 25)
  {
    digitalWrite(blue, HIGH);
  }
  else{
    digitalWrite(blue, LOW);
  }

  
}
void greenlight()
{
  if(data.temperature <= 12)
  {
    digitalWrite(green, HIGH);
  }
  else
  {
   digitalWrite(green, LOW);
  }

}

void loop() {
  getwifi();
  distance = getdistance();
  data = dhtsensor.getTempAndHumidity();
  redlight();
  bluelight();
  greenlight();
  ThingSpeak.setField(1,data.temperature);
  ThingSpeak.setField(2,data.humidity);
  ThingSpeak.setField(3,distance);
  ThingSpeak.setField(4,buzz_value);
  statusCode = ThingSpeak.writeFields(mychannel_number,WriteKey);
  if(statusCode == 200)
  {
    Serial.println("the channel updated");
  }
  else
  {
    Serial.println("error"+String(statusCode));
  }
  delay(15000);

}