#include <WiFi.h>
#include <ThingSpeak.h>
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannel1Number = 2623020;
const char* myWriteAPIKey = "4FT5XS39VMADEVJ0";
int statusCode;
const int dhtpin=26;
#define TRIGGER 14
#define ECHO 27
#define led 13
float distance;
long duration;
int ledvalue;
void setup()
 {
  Serial.begin(115200);
  pinMode(TRIGGER, OUTPUT);
  pinMode(ECHO, INPUT);
  pinMode(led, OUTPUT);
  WiFi.begin(ssid,pass);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
  delay(1000);
}    
void loop() 
{
    distance = getvalue();
    Serial.println("distance:"+String(distance));
    delay(1000); 
  if(distance<=100)
  {
    digitalWrite(led, HIGH);
    ledvalue =digitalRead(13);
  }
  else
  {
    digitalWrite(led, LOW);
    ledvalue =digitalRead(13);
  }
  Serial.print("led value:"+String(ledvalue));
  getWiFi();
  ThingSpeak.setField(1,distance);
  ThingSpeak.setField(2,ledvalue);
  statusCode = ThingSpeak.writeFields(myChannel1Number, myWriteAPIKey);
}
 long int getvalue()
{
  digitalWrite(TRIGGER, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER, HIGH);
  delay(10);
  digitalWrite(TRIGGER, LOW);
  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(4000);
    }
  }
  Serial.println("\nConnected");
}