E08. Wi-Fi Fundamentals: Station vs Access Point

#include <WiFi.h>                         // the Wi-Fi commands

String ssid = "YOUR_WIFI_SSID";           // your Wi-Fi network name
String password = "YOUR_WIFI_PASSWORD";   // your Wi-Fi password

void setup() {                            // runs once
  Serial.begin(115200);                   // start Serial at the ESP32 speed

  WiFi.begin(ssid, password);             // start joining the network
  Serial.print("Connecting");             // tell the user we are trying
  while (WiFi.status() != WL_CONNECTED) { // repeat until we have joined
    delay(500);                           // wait half a second
    Serial.print(".");                    // print a dot each time
  }
  Serial.println(" connected");           // we are on the network

  Serial.print("IP address: ");           // a label
  Serial.println(WiFi.localIP());         // the address the router gave us
  Serial.print("Signal strength: ");      // a label
  Serial.print(WiFi.RSSI());              // signal strength, e.g. -60
  Serial.println(" dBm");                 // the unit
  Serial.print("Free memory: ");          // a label
  Serial.println(ESP.getFreeHeap());      // lower than without Wi-Fi
}

void loop() {                             // nothing to repeat in this sketch
}

#include <WiFi.h>                           // the Wi-Fi commands

void setup() {                              // runs once
  Serial.begin(115200);                     // start Serial at the ESP32 speed
  WiFi.softAP("ESP32-yourname", "lab12345"); // make a network: name, password
  Serial.print("Network ready. Address: "); // a label
  Serial.println(WiFi.softAPIP());          // the ESP32's address, usually 192.168.4.1
}

void loop() {                               // runs over and over
  Serial.print("Devices joined: ");         // a label
  Serial.println(WiFi.softAPgetStationNum()); // how many phones or PCs have joined
  delay(2000);                              // check every 2 seconds
}