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


char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2610252;
const char * myWriteAPIKey = "7UL62N42YX6GW7CF";
int statusCode;
int ledstatus;




int trig = 19;
int echo = 18;
long dist,dur;

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

WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);


  sensor.setup(pin ,DHTesp::DHT22);
  pinMode(19, OUTPUT);
  pinMode(18, INPUT);
 
}

void loop() {

connectToCloud();
writeData();







 data = sensor.getTempAndHumidity();
 Serial.println(String(data.temperature) + " this is temperature"  );
 Serial.println("");
 Serial.println(String(data.humidity) + " this is humidity"  );
 

 digitalWrite(trig, LOW);
 delayMicroseconds(2);
 digitalWrite(trig, HIGH);
 delayMicroseconds(10);
 digitalWrite(trig, LOW);
 dur = pulseIn(echo , HIGH);
 dist = (dur * 0.034)/2 + 1;
 Serial.println(dist);
 delay(2000);

 if(dist<100 && data.temperature > 30){
digitalWrite(26, HIGH);
ledstatus = 1;
 }
 else{
  digitalWrite(26, LOW);
  ledstatus = 0;
 }

}

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



void writeData(){
ThingSpeak.setField(1, dist);
ThingSpeak.setField(2,data.humidity);
ThingSpeak.setField(3,data.temperature);
ThingSpeak.setField(4,ledstatus);
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(15000); // data to be uploaded every 15secs
}