#include<DHTesp.h>
#include <WiFi.h>
#include <ThingSpeak.h>
#include <WiFi.h>
char ssid[]="Wokwi-GUEST";
char pass[]="";
WiFiClient client;
unsigned long myChannelNumber=2626612;
const char * myWriteAPIKey="605GE8I0P4YGRMHQ" ;
int statusCode;
DHTesp dhtSensor;
TempAndHumidity data;
const int DHT_PIN = 17;
int trig = 14;
int echo = 27;
int led1 = 12;
int led2 =13;
float reading; 
float distance;


void setup() {
  Serial.begin(115200);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(32, INPUT);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
  dhtSensor.setup(DHT_PIN,DHTesp::DHT22);
}

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("\n connected");
   }

  int a = analogRead(26);
  Serial.println("potentiometer:"+String(a));
  digitalWrite(trig, HIGH);
  delay(10);
  digitalWrite(trig, LOW);
  reading =(pulseIn(echo,HIGH));
  distance = (reading*0.034/2)+1;
  Serial.println("ultrasonic:"+String(distance));
  delay(1000); 
  data=dhtSensor.getTempAndHumidity();
Serial.println("humidity:"+String(data.humidity,1));
Serial.println("temperature:"+String(data.temperature,2));
Serial.println("next one !");

if((distance<200)&&(data.humidity>40.00)&&(data.temperature>50.00))
{
  Serial.println("channel updated success");
  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
  delay(2000);
}
else {
   Serial.println("Problem writing data http error code"+String(statusCode));
  digitalWrite(led2, HIGH);
  digitalWrite(led1, LOW);
}
ThingSpeak.setField(1,a);
ThingSpeak.setField(2,distance);
ThingSpeak.setField(3,data.humidity);
ThingSpeak.setField(4,data.temperature);
statusCode=ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
}