NodeMCU

Wifi Scan 샘플 코드 

http://henrysbench.capnfatz.com/henrys-bench/arduino-projects-tips-and-more/arduino-esp8266-lolin-nodemcu-getting-started/

#include "ESP8266WiFi.h"

void setup() {
  Serial.begin(115200);
  // Set WiFi to station mode and disconnect from an AP if it was previously connected
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(2000);
  Serial.println("Setup done");
}

void loop() {
  Serial.println("scan start");

  
  int n = WiFi.scanNetworks();// WiFi.scanNetworks will return the number of networks found
  Serial.println("scan done");
  if (n == 0)
    Serial.println("no networks found");
  else
  {
    Serial.print(n);
    Serial.println(" networks found");
    for (int i = 0; i < n; ++i)
    {
      // Print SSID and RSSI for each network found
      Serial.print(i + 1);
      Serial.print(": ");
      Serial.print(WiFi.SSID(i));
      Serial.print(" (");
      Serial.print(WiFi.RSSI(i));
      Serial.print(")");
      Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" ":"*");
      delay(10);
    }
  }
  Serial.println("");

  // Wait a bit before scanning again
  delay(5000);
}

MAC Address 주소 출력 

https://techtutorialsx.com/2017/04/09/esp8266-get-mac-address/

#include "ESP8266WiFi.h"
 
void setup(){
 
   Serial.begin(115200);
   delay(500);
 
   Serial.println();
   Serial.print("MAC: ");
   Serial.println(WiFi.macAddress());
 
}
 
void loop(){}

wifi 연결 

https://arduino-esp8266.readthedocs.io/en/2.4.2/esp8266wifi/readme.html#quick-start

#include 


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

  WiFi.begin("my phone의 iPhone", "123456789q");

  Serial.print("Connecting");
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println();

  Serial.print("Connected, IP address: ");
  Serial.println(WiFi.localIP());
}

void loop() {}