#include <WiFi.h> 
#include<ESP8266WiFi.h>
#include<ThingSpeak.h>
#include <ThingSpeak.h> 
int trig=25; 
 int echo=26; 
long t; 
int distance; 
WiFiClient client; 
 
const long id = 2554508; 
const char WriteApi[]= "7IULSPI9CRDWNEHG"; 
 
 
void setup () { 
  Serial.begin(115200); 
pinMode(trig, OUTPUT); 
pinMode (echo,INPUT); 
  WiFi.mode(WIFI_STA); 
  WiFi.begin("Wokwi-GUEST",""); 
  while(WiFi.status()!= WL_CONNECTED){ 
    Serial.println("-"); 
    delay(500); 
    ThingSpeak.begin(client); 
    
  } 
   Serial.println("connected"); 
// put your setup code here, to run once: 
 
 
} 
void loop() { 
digitalWrite(trig, LOW); 
digitalWrite(trig, HIGH); 
delayMicroseconds (10); 
digitalWrite(trig, LOW); 
t=pulseIn(echo, HIGH) ; distance=.034*t/2; 
Serial.println(distance); 
delay(2000); 
ThingSpeak.setField(2,distance); 
int ret= ThingSpeak.writeFields(id,WriteApi); 
if(ret==200){ 
  Serial.println("data uploaded"); 
 
} 
else{ 
    Serial.println("error!"); 
 
} 
}