Unterschiede zwischen USB & Netzteil

#include <ESP8266WiFi.h>

#include <ESP8266mDNS.h>

#include <WiFiClient.h>

const char* ssid = "my-wlan";

const char* password = "!pwd123456";

// TCP server at port 80 will respond to HTTP requests

WiFiServer server(80);

void setup(void)

{  

  Serial.begin(115200);

  pinMode(D8, OUTPUT);

  // Connect to WiFi network

  WiFi.begin(ssid, password);

  Serial.println("");  

  // Wait for connection

  while (WiFi.status() != WL_CONNECTED) {

    delay(500);

    Serial.print(".");

  }

  Serial.println("");

  Serial.print("Connected to ");

  Serial.println(ssid);

  Serial.print("IP address: ");

  digitalWrite(D8, HIGH);

  Serial.println(WiFi.localIP());

  // Set up mDNS responder:

  // - first argument is the domain name, in this example

  //   the fully-qualified domain name is "esp8266.local"

  // - second argument is the IP address to advertise

  //   we send our IP address on the WiFi network

  if (!MDNS.begin("esp8266")) {

    Serial.println("Error setting up MDNS responder!");

    while(1) { 

      delay(1000);

    }

  }

  Serial.println("mDNS responder started");

  // Start TCP (HTTP) server

  server.begin();

  digitalWrite(D8, LOW);

  Serial.println("TCP server started");

  // Add service to MDNS-SD

  MDNS.addService("http", "tcp", 80);

}