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

DHTesp dhtSensor;
TempAndHumidity data;

char ssid[]="Nanem-Guest";
char pass[]="";
WiFiClient client;

unsigned long myChannelNumber=2606167; 
const char* myWriteAPIKey="D20G9OXNZ4DTT7AK";
int statusCode;

void setup(){
Serial.begin(115200);
dhtSensor.setup(25, DHTesp:: DHT22);
pinMode(26, OUTPUT);
pinMode(25, OUTPUT);
pinMode(27, INPUT);

WiFi.mode (WIFI_STA);
ThingSpeak.begin(client); 
delay(1000);
Serial.println("Hello, ESP32!");
}
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("\nConnected");
}

void loop(){
  getwifi();
  data = dhtSensor.getTempAndHumidity();
  Serial.println(data.humidity);
  Serial.println(data.temperature);

  digitalWrite(26, LOW);
  delayMicroseconds(1000);
  digitalWrite(26, HIGH);
  delayMicroseconds(1000);
  digitalWrite(27, LOW);
    float duration = pulseIn(27, HIGH);
    int distance = duration*0.03405/2;
    Serial.print(distance);
    

  ThingSpeak.setField(1,data.humidity);
  ThingSpeak.setField(2,data.temperature);
  ThingSpeak.setField(3,distance);
  statusCode=ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

   if(statusCode==200)
   {
    Serial.println("Channel Update Successful");
   }
   else
   {
    Serial.println("Problem Writing data : HTTP error code :" +String(statusCode));
   }
   delay(15000);
}