#include <WiFi.h>
#include <ArduinoIoTCloud.h>
#include <Arduino_ConnectionHandler.h>

#define TRIGGER_PIN 5
#define ECHO_PIN 4

// WiFi credentials
const char SSID[] = "Wokwi-GUEST";
const char PASSWORD[] = "";

// IoT Cloud variables
int water_level;
int lowest_level;
int highest_level;

// Callback function to handle cloud updates
void onWaterLevelChange() {
  // Handle water level changes in the cloud
}

void setup() {
  Serial.begin(9600);

  // Set up WiFi connection
  ArduinoCloud.begin(SSID, PASSWORD);

  // Set up pins for ultrasonic sensor
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  // Set up IoT Cloud variables
  ArduinoCloud.setThingId("42c44d68-3f0b-407f-ac6c-b088467ddfdd");
  ArduinoCloud.addProperty(water_level, READ_WRITE, ON_CHANGE, onWaterLevelChange);
  ArduinoCloud.addProperty(lowest_level, READ_WRITE, ON_CHANGE, NULL);
  ArduinoCloud.addProperty(highest_level, READ_WRITE, ON_CHANGE, NULL);
}

void loop() {
  ArduinoCloud.update();

  // Measure water level
  long duration, distance;
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);
  duration = pulseIn(ECHO_PIN, HIGH);
  distance = (duration / 2) / 29.1;

  // Update water level variables
  water_level = distance;
  if (distance < lowest_level || lowest_level == 0) {
    lowest_level = distance;
  }
  if (distance > highest_level) {
    highest_level = distance;
  }

  // Print water level to serial monitor
  Serial.print("Water level: ");
  Serial.print(water_level);
  Serial.println(" cm");

  delay(1000);
}