#include "WiFi.h"

// WiFi network credentials
const char* ssid = "Varshitha";
const char* password = "Varshi@123";

// Signal strength threshold (RSSI)
const int signalThreshold = 70;

// Struct to hold WiFi scan results
struct WiFiNetwork {
  String ssid;
  int32_t rssi;
  bool isSecure;
};

// Array to hold scan results
WiFiNetwork networks[20];
int networkCount = 0;

void setup() {
  Serial.begin(115200);
  Serial.println("Initializing WiFi...");
  WiFi.mode(WIFI_STA);  // Set WiFi mode to station
  Serial.println("Setup done!");

  // Connect to specified network
  connectToNetwork();
}

void loop() {
  // Enhance scan frequency: Scan every 2 seconds
  delay(2000);

  Serial.println("Scanning...");
  int n = WiFi.scanNetworks();
  Serial.println("Scan done!");

  if (n == 0) {
    Serial.println("No networks found.");
  } else {
    Serial.println();
    Serial.print(n);
    Serial.println(" networks found");

    networkCount = (n > 20) ? 20 : n;  
    for (int i = 0; i < networkCount; ++i) {
      networks[i].ssid = WiFi.SSID(i);
      networks[i].rssi = WiFi.RSSI(i);
      networks[i].isSecure = (WiFi.encryptionType(i) != WIFI_AUTH_OPEN);
      Serial.print(i + 1);
      Serial.print(": ");
      Serial.print(networks[i].ssid);
      Serial.print(" (");
      Serial.print(networks[i].rssi);
      Serial.print(")");
      Serial.println(networks[i].isSecure ? "*" : " ");
    }
  }
  Serial.println("");
  WiFi.mode(WIFI_OFF);
  delay(3000);
  WiFi.mode(WIFI_STA);
}

void connectToNetwork() {
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}