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

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

int trigger=12;
int echo=14;
float distance;

DHTesp jee;
TempAndHumidity data;

WiFiClient client;
 long myChannelNumber = 2614341;
const char * myWriteAPIKey = "ZS0GNT7ERXLICP04";
int statusCode;




void setup() {

  Serial.begin(115200);
  WiFi.mode(WIFI_STA);

  jee.setup(18, DHTesp::DHT22);

  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(23, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(21, OUTPUT);
  pinMode(15, OUTPUT);

   ThingSpeak.begin(client);
  Serial.begin(115200);

}
int ultraperformance(){
digitalWrite(trigger, LOW);
delay(10);
digitalWrite(trigger, HIGH);
delay(100);
digitalWrite(trigger,LOW);
distance=pulseIn(echo, HIGH);
return(distance*0.034/2)+1;
}

void loop() {

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

  data = jee.getTempAndHumidity();

  Serial.println("Humi : " + String(data.humidity));
  Serial.println("Temp : " + String(data.temperature));



 if (actual_distance>300 && data.temperature<30 && data.humidity>70){ 
  digitalWrite(21, HIGH);
  digitalWrite(22, LOW);
  digitalWrite(23, LOW);
  Serial.println("You are safe");
 }

else if (actual_distance>200 && actual_distance<300 && data.temperature>=30 && data.temperature<=70 && data.humidity>=30 && data.humidity<=70){
  digitalWrite(22, HIGH);
  digitalWrite(21, LOW);
  digitalWrite(23, LOW);
  Serial.println("You are not safe");
}

else if (actual_distance>0 && actual_distance<200 && data.temperature>=70 && data.humidity<=30){
  digitalWrite(23, HIGH);
  digitalWrite(22, LOW);
  digitalWrite(21, LOW);
  Serial.println("You are in danger");
  tone(15,100);
}

else{
  digitalWrite(23, LOW);
  digitalWrite(22, LOW);
  digitalWrite(21, LOW);
}
{
  ThingSpeak.setField(1, data.temperature);
  ThingSpeak.setField(2, data.humidity);
  ThingSpeak.setField(3, actual_distance);

  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

  if(statusCode == 200) { //successful writing code
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
}
}

}