#include <ESP32WiFi.h>
#include <WiFiClient.h>
#include <WiFiUdp.h>
#include <ESP32HTTPClient.h>
#include <UrlEncode.h>

const char *ssid     = "WOKWI-Guest";
const char *password = "";

String phoneNumber = "6289611587524";
String apiKey = "5713236";

void pesan1(String message) {
  
  String url = "http://api.callmebot.com/whatsapp.php?phone=" + phoneNumber + "&apikey=" + apiKey + "&text=" + urlEncode(message);
  WiFiClient client;
  HTTPClient http;
  http.begin(client, url);

  // Specify content-type header
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");

  // Send HTTP POST request
  int httpResponseCode = http.POST(url);
  if (httpResponseCode == 200) {
    Serial.print("Message sent successfully");
  }
  else {
    Serial.println("Error sending the message");
    Serial.print("HTTP response code: ");
    Serial.println(httpResponseCode);
  }

  // Free resources
  http.end();
}
#define trig 18
#define echo 19
#define valve 14
const int setpoint = 20;
int tinggi_limbah = 0;

float duration_us, distance_cm;

void setup() {
  Serial.begin (9600);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(valve, OUTPUT);
}

void loop() {

  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);


  int durasi = pulseIn(echo, HIGH);
  int jarak = 0.017 * durasi;

  if (jarak <= setpoint)
    {digitalWrite(valve, HIGH); Serial.print("Saluran Ditutup!!!");}
  else
    {digitalWrite(valve, LOW); Serial.print("Saluran Dibuka!!");
    }
  Serial.print("distance: ");
  Serial.print(jarak);
  Serial.println(" cm");



  delay(500);
}