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

#define PIN_TRIG 26
#define PIN_ECHO 27

int ledV  = 32;
int ledA = 33;
int ledR = 25;

String url= "https://api.thingspeak.com/update?";
String api_key= "31ZM340LT4L0VV1H";
String sensor= "field3";


void setup(){
  pinMode(ledV, OUTPUT);
  pinMode(ledA, OUTPUT);
  pinMode(ledR, OUTPUT);

  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);

  delay(1000);
  Serial.begin(115200);

  WiFi.begin("Wokwi-GUEST", "");

  while((WiFi.status() != WL_CONNECTED)) {
      delay(500);
      Serial.print(".");
    }
     Serial.println("Wifi conected");
}

void loop(){
  delay(1000);
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);

  long duration = pulseIn(PIN_ECHO, HIGH);
  int distance = duration / 58;
  Serial.print("Distance in: ");
  Serial.println(distance);
  
  if (distance > 200) {
    digitalWrite(ledV, HIGH);
    digitalWrite(ledA, LOW);
    digitalWrite(ledR, LOW);
  } else if (distance <= 200 && distance > 2) {
    digitalWrite(ledV, LOW);
    digitalWrite(ledA, HIGH);
    digitalWrite(ledR, LOW);
  } else if (distance <= 2) {
    digitalWrite(ledV, LOW);
    digitalWrite(ledA, LOW);
    digitalWrite(ledR, HIGH);
  } else {
    digitalWrite(ledV, LOW);
    digitalWrite(ledA, LOW);
    digitalWrite(ledR, LOW);
  }
  if((WiFi.status() == WL_CONNECTED)) {
    HTTPClient http;
    String message=url+"api_key="+api_key+"&"+sensor+"="+String(distance);
    http.begin(message);

    int httpCode = http.GET();
    Serial.println(message);
    Serial.print("Get code");
    Serial.println(httpCode);
    http.end();
  }
  delay (3000);
}