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

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

WiFiClient client;

unsigned long CHANNEL_ID = 2608299;
const char* WRITE_API_KEY = "3E510ZFD6SKICIHP";

int status;

DHTesp dhtSensor;
TempAndHumidity data;

const int DHT_PIN = 25;
const int TRIG = 27;
const int ECHO = 14;

float distance;
long duration;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN,DHTesp::DHT22);
  pinMode(TRIG, OUTPUT);
  pinMode(ECHO, INPUT);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}

void getWiFi(){
  if(WiFi.status()!=WL_CONNECTED){
    Serial.println("Attempting to connect");
    while(WiFi.status()!=WL_CONNECTED){
      WiFi.begin(ssid,pass);
      Serial.println(".");
      delay(5000);
    }
    Serial.println("connected");
  }
}

void loop() {
  getWiFi();
  data = dhtSensor.getTempAndHumidity();

  Serial.println("Humidity : "+String(data.humidity));
  Serial.println("Temperature : "+String(data.temperature));

  digitalWrite(TRIG, LOW);
  delayMicroseconds(10);
  digitalWrite(TRIG,HIGH);
  duration = pulseIn(ECHO,HIGH);
  distance = 0.017*duration;

  Serial.println("distance : "+String(distance));
  Serial.println("-----------------");

  ThingSpeak.setField(1,data.humidity);
  ThingSpeak.setField(2,data.temperature);
  ThingSpeak.setField(3,distance);

  status = ThingSpeak.writeFields(CHANNEL_ID,WRITE_API_KEY);

  if(status == 200){
    Serial.println("channel updated sucessfully");
  }
  else{
    Serial.println("problem with writing data , HTTP status code : "+String(status));
  }
  // put your main code here, to run repeatedly:
  delay(15000); // this speeds up the simulation
}