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

char ssid[]="Wokwi-GUEST";
char pass[]="";
WiFiClient client;
unsigned long myChannelNumber=2063001;
const char* myWriteAPIKey="9IOGBLS7OKMPEZPP";
int statusCode;

DHTesp dhtSensor;
TempAndHumidity data;

const int echo=4;
const int trig=2;
int distance;
float duration;
void setup() {
  Serial.begin(115200);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT); 
WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);  
  dhtSensor.setup(15,DHTesp::DHT22);
}
void getwifi()
{
  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");
}


float getdistance(){
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  duration=pulseIn(echo,HIGH);
  return {duration*0.034/2};
}
void loop() {
 distance=getdistance();
 data=dhtSensor.getTempAndHumidity();
 Serial.println(distance);
 Serial.println(data.humidity);
 Serial.println(data.temperature);
 getwifi();
 ThingSpeak.setField(1,data.humidity);
  ThingSpeak.setField(2,data.temperature);
  ThingSpeak.setField(3,distance);
  statusCode=ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

  if(statusCode==200)
  {
    Serial.println("Channel update successful");
  }
  else
  {
    Serial.println("Problem Writing data: HTTp error code:"+String(statusCode));
  }
  delay(15000);
}