Arduino ESP32 WIFI - WIFI Scan

wifi_scan.ino

#include "Arduino.h"
#include "WiFi.h"

void setup()
{
  Serial.begin(115200);

  Serial.println("Lonely Binary Wifi Scan Demo");

  /*
      Set WiFi to station mode;
      Disconnect the previously connected WiFi;
      Delay 100ms to ensure the WiFi disconnects;
  */
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100);
}

void loop()
{
  Serial.println("Start scanning WiFi networks");

  /*
      Start Scan WiFi networks in block mode;
      If no networks found, it will return 0;
      If networks found, it will return the number of networks found;
  */
  int n = WiFi.scanNetworks();

  Serial.printf("%d network(s) found\n", n);

  for (int i = 0; i < n; ++i)
  {
    Serial.printf("(%2d) RSSI: %2d, Channel: %2d, SSID: %s \n", 
                    i,  WiFi.RSSI(i), WiFi.channel(i), WiFi.SSID(i));
  }

  Serial.println("");

  // Delete the scan result to free memory for code below.
  WiFi.scanDelete();

  delay(5000);
}