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

DHTesp dhtsensor;
TempAndHumidity data;
const int dhtpin = 15;
const int echo = 14;
const int trig = 12;
float distance;
float duration;

char ssid[] = "Wokwi_GUEST";
char pass[] = "";
WiFiClient Client;

unsigned long mychannelNumber = 2638310;
const char * myWriteAPIkey = "NLEM30RCY8RKM3X8";
int statuscode;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(echo,INPUT);
  pinMode(trig,OUTPUT);

  dhtsensor.setup(dhtpin,DHTesp::DHT22);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(Client);
  delay(1000);
}

float getdistance(){
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  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(5000);
    }
  }
  Serial.println("/nconnect");
}
void loop() {
  // put your main code here, to run repeatedly:
  getwifi();
  data = dhtsensor.getTempAndHumidity();
  distance = getdistance();
  ThingSpeak.setField(1,data.temperature);
  ThingSpeak.setField(2,data.humidity);
  ThingSpeak.setField(3,distance);
  statuscode = ThingSpeak.writeFields(mychannelNumber,myWriteAPIkey);
   
  if(statuscode == 200){
    Serial.println("CHANNEL UPDATED");
  }
  else{
    Serial.println("problem updating channel:HTTP error code" +String (statuscode));
  }
  delay(1000); // this speeds up the simulation
}