led-demo/src/main.cpp

#include <Arduino.h>
#include <WiFi.h>
#define LED_PIN 2

void setup() {
  Serial.begin(9600);
  pinMode(LED_PIN,OUTPUT);
  WiFi.mode(WIFI_MODE_STA);
  WiFi.enableIpV6();
  WiFi.begin("8406","13967898042");
  while(!WiFi.isConnected()){
    Serial.println("watting for wifi connect...");
    delay(800);
  }
  digitalWrite(LED_PIN,HIGH);
  Serial.println("wifi connected.");
}

void loop() {
  digitalWrite(LED_PIN,HIGH);
  Serial.println(WiFi.gatewayIP());
  Serial.println(WiFi.RSSI());
  Serial.println(WiFi.localIP());
  Serial.println(WiFi.localIPv6());
  delay(1000);
  digitalWrite(LED_PIN,LOW);
  delay(200);
}