#include <DHTesp.h>
#include <WiFi.h>
#include <ThingSpeak.h>

int Trigg =19;
int echo = 21; 
int green = 25;
int orange=26;
int red=27;
float distance;

WiFiClient client; //wifi client
long myChannelNumber =2614296; //thingspeak channel number
const char * myWriteAPIKey = "9NSJV1OBE2N0VZLV"; //thingspeak mywrite_apikey
char ssid[] = "Wokwi-GUEST"; //wifi id
char pass[] = ""; //wifi password


DHTesp pritheesh;
TempAndHumidity data;
 


void setup() {

  ThingSpeak.begin(client);

  Serial.begin(115200);
 pritheesh.setup(18, DHTesp::DHT22);
  pinMode(Trigg,OUTPUT );
  pinMode(echo,INPUT);
 // pinMode(green,OUTPUT );
  pinMode(orange,OUTPUT );
  pinMode(red,OUTPUT );
  pinMode(14, OUTPUT);
  pinMode(23, OUTPUT);
  WiFi.mode(WIFI_STA); //wifi setup mode

  if(WiFi.status() != WL_CONNECTED) //checking wifi connection
  {
    Serial.print("Attempting to connect");
     while(WiFi.status() != WL_CONNECTED)
      {
        WiFi.begin(ssid, pass); 
        Serial.print(".");
        delay(5000);
      }
    Serial.println("\nConnected.");
  }
}

int ultra() {   //getting utrasonic sensor data
  digitalWrite(Trigg, LOW);
  delay(10);
  digitalWrite(Trigg, HIGH);
  delay(100);
  digitalWrite(Trigg, LOW);
  distance=pulseIn(echo,HIGH);
  return(distance*0.034/2);
}



void loop() {

  data = pritheesh.getTempAndHumidity(); // getting temp and humi in dht library
  int humi =int(data.humidity); // giving temperature value to variables
  int temp=int(data.temperature);// giving humidity value to variables
  int sonic=ultra(); // giving ultrasonic value to variables
  
  Serial.println(sonic);
  Serial.println(humi);
  Serial.println(temp);

  if(temp<=30 && humi>=70 && sonic>=300){
    // digitalWrite(green,HIGH);
     digitalWrite(orange,LOW);
     digitalWrite(red,LOW);
     Serial.println("safe");
     digitalWrite(23, HIGH);
     noTone(14);
   }
 
  else if((temp>30 && temp<70) && (humi>=30 && humi<70) && (sonic>=200 && sonic<300)){
    digitalWrite(red,LOW);
   //  digitalWrite(green,LOW);
     digitalWrite(orange,HIGH);
     Serial.println("not safe");
     noTone(14);

  }
  
 
  else if(temp>70 && humi<30 && sonic<200){
     digitalWrite(red,HIGH);
    // digitalWrite(green,LOW);
     digitalWrite(orange,LOW);
     Serial.println("danger");
     tone(14,5000);
     noTone(14);
  }

  else{
   //  digitalWrite(green,LOW);
     digitalWrite(orange,LOW);
     digitalWrite(red,LOW);
     Serial.println(".........");
  
  }

  ThingSpeak.setField(1,temp); //set feilds for temperature
  ThingSpeak.setField(2,humi); //set feilds for humidity
  ThingSpeak.setField(3,sonic);//set feilds for ultrasonic

 int statusCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  //writing values into thinkspeak through myChannelNumber, myWriteAPIKey
 
//checking if values whether send to thingspeak or not

  if(statusCode==200){
    Serial.println("Channel update successful.");
  }

  else {
    Serial.println("Problem Writing data. HTTP error code :" +
    String(statusCode));
  }
delay(20000);

}