#include<DHTesp.h>
#include <WiFi.h>
#include<ThingSpeak.h>
DHTesp dhtsensor;
TempAndHumidity data;
const int dhtpin=25; 
long duration;
float distance;
float temperature;
float humidity;
int led;
#define trig 19
#define echo 18
#define red 14
char ssid[]="Wokwi-GUEST";
char pass[]="";
WiFiClient client;
unsigned long myChannel1Number= 2605609;
const char* myWriteAPIKey="6P0PZ8DYYHH1UWW6";
int statusCode;

void setup() {
  
  Serial.begin(115200);
  dhtsensor.setup(dhtpin,DHTesp::DHT22);
 pinMode(trig,OUTPUT);
 pinMode(echo, OUTPUT);
 pinMode(red, OUTPUT);
 WiFi.mode(WIFI_STA);
 ThingSpeak.begin(client);
 delay(1000);

}

void loop()
 {
  if(distance < 200)
  {

    digitalWrite(red, HIGH);
    led=1;
  }
  else
  {
    digitalWrite(red, LOW);
    led=0;
  }
  data=dhtsensor.getTempAndHumidity();
  Serial.println("humi"+String(data.humidity));
  Serial.println("temp"+String(data.temperature));
  delay(1000);
  distance = getdistance();
  Serial.println("distance"+String(distance));
  getwifi();
  ThingSpeak.setField(1,distance);
  ThingSpeak.setField(2,data.temperature);
  ThingSpeak.setField(3,data.humidity);
  ThingSpeak.setField(4,led);
  statusCode=ThingSpeak.writeFields(myChannel1Number,myWriteAPIKey);
  if(statusCode==200)
  {
    Serial.println("channel update successful");
  }
  else
  {
    Serial.println("problem Writing date: HTTp error code:"+String(statusCode));
  }
 
  delay(1000); 


 }
long getdistance()
{
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delay(10);
  digitalWrite(trig, LOW);
  duration = pulseIn(echo,HIGH);
  return{duration*0.034/2};
}
void getwifi()
{
  if(WiFi.status()!=WL_CONNECTED)
  {
    Serial.print(("Attempting to connect"));
    while(WiFi.status()!=WL_CONNECTED)
    {
      WiFi.begin(ssid,pass);
      Serial.print(".");
      delay(4000);
    }
  }
  Serial.println("\n Connected");
}