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

#define TRIGGER_PIN  26  // Arduino digital pin connected to the sensor's trigger pin
#define ECHO_PIN     25  // Arduino digital pin connected to the sensor's echo pin
#define MAX_DISTANCE 200 

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2258527;
const char * myWriteAPIKey = "BZX4PF9LW6KGVRP0";
int statusCode;

NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);

void setup() {
Serial.begin(115200);
WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);

}
void loop() {

 delay(1000); // Delay for stability

  // Send a ping and get the result (in centimeters)
  unsigned int distance = sonar.ping_cm();
   int value =distance ;
   if (distance > 0) {
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.println(" cm");
  } else {
    Serial.println("Out of range");
  } 

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

ThingSpeak.setField(1, value);


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);
}