WIFI04_多個SSID自動連接_ESP32 NodeMCU 32S

 https://gist.github.com/clive520/ebce394cfb41d615dffdec7a749d93f8

#include <WiFi.h>

#include <WiFiMulti.h>

#define LED_BUILTIN 2   // 連接到WIFI時，亮內建的LED

WiFiMulti wifiMulti;

void setup()

{

  pinMode(LED_BUILTIN, OUTPUT);

  digitalWrite(LED_BUILTIN,LOW) ;

  Serial.begin(9600);

  delay(10);

    wifiMulti.addAP("clive_lef", "12345678");

    wifiMulti.addAP("clive_1F", "12345678");

    wifiMulti.addAP("book", "12345678");

  

      Serial.println("Connecting Wifi...");

    if(wifiMulti.run() == WL_CONNECTED) {  //連接多個WIFI

      delay(50);

      Serial.println("");

      Serial.print("Successful Connecting to Access Point:");

      Serial.println(WiFi.SSID());

      Serial.print("SSID　Signal strength:");

      Serial.println(WiFi.RSSI());//WiFi.RSSI()訊號強度

      Serial.println("WiFi connected");

      Serial.print("IP address: ");

      Serial.println(WiFi.localIP());//WiFi.localIP()連接到的IP

      digitalWrite(LED_BUILTIN,HIGH) ; //成功時亮內建的LED

    }

    

    

}

void loop()

{

}