#include <DHTesp.h>
#include <ThingSpeak.h>
#include <WiFi.h>
WiFiClient client;
long myChannelNumber =  2629449;
const char * myWriteAPIKey = "ODTUJCHZDN90P12S";
int statusCode;
char ssid[]="Wokwi-GUEST";
char pass[]="";
DHTesp dht;
TempAndHumidity data;
int distance();
int r = 25;
int o = 26;
int g = 27;
int trig = 17;
int echo = 16;
int buzzer = 4;
void setup() {
  ThingSpeak.begin(client);
  pinMode(r, OUTPUT);
  pinMode(o, OUTPUT);
  pinMode(g, OUTPUT);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  dht.setup(18,DHTesp::DHT22);
  WiFi.mode(WIFI_STA);
}

void loop() {
  if(WiFi.status()!=WL_CONNECTED)
  {
    Serial.println("Attempting to connect");
    while(WiFi.status()!=WL_CONNECTED)
    {
       WiFi.begin(ssid,pass);
       delay(1000);
       Serial.print(".");
    }
    Serial.println("Connected !");
  }

  delay(1000);
  
  noTone(buzzer);
  data = dht.getTempAndHumidity();
  float data2 = distance();

  delay(1000);
  ThingSpeak.setField(1,data.temperature);
  ThingSpeak.setField(2,data.humidity);
  ThingSpeak.setField(3,data2);

  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));
  }
  delay(1000); // this speeds up the simulation

  Serial.println("Temerature : "+String(data.temperature));
  Serial.println("humidity : "+String(data.humidity));
  Serial.println("Distance : "+String(data2));

}


int distance()
{
  digitalWrite(trig, HIGH);
  delay(100);
  digitalWrite(trig, LOW);
  float a = pulseIn(echo,HIGH);
  return(a*0.034/2);
}