#include <WiFiNINA.h>
#include <PubSubClient.h>
// Replac#include <SPI.h>
 with your network credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

// Replace with your IBM Cloud IoT platform credentials
const char* mqttServer = "your_mqtt_server";
const int mqttPort = 1883;
const char* mqttUsername = "your_mqtt_username";
const char* mqttPassword = "your_mqtt_password";
const char* deviceTopic = "iot-2/evt/status/fmt/json";

// Pin configuration for ultrasonic sensor
const int trigPin = 7;
const int echoPin = 6;

WiFiClient wifiClient;
PubSubClient mqttClient(wifiClient);

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  
  Serial.begin(9600);
  delay(2000);

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Connect to IBM Cloud IoT platform
  mqttClient.setServer(mqttServer, mqttPort);
  while (!mqttClient.connected()) {
    Serial.println("Connecting to MQTT...");
    if (mqttClient.connect("arduinoClient", mqttUsername, mqttPassword)) {
      Serial.println("Connected to MQTT");
    } else {
      Serial.print("MQTT connection failed, retrying in 5 seconds...");
      delay(5000);
    }
  }
}

void loop() {
  // Read distance from ultrasonic sensor
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);