（實例一）ESP8266 TFT(ST7735)彩屏-web刷圖
https://www.arduino.cn/thread-42247-1-1.html
（實例二） 自己當AP時建立MDNS域名
/*
ESP8266 mDNS responder sample
This is an example of an HTTP server that is accessible
via http://esp8266.local URL thanks to mDNS responder.
Instructions:
- Update WiFi SSID and password as necessary.
- Flash the sketch to the ESP8266 board
- Install host software:
- For Linux, install Avahi (http://avahi.org/).
- For Windows, install Bonjour (http://www.apple.com/support/bonjour/).
- For Mac OSX and iOS support is built in through Bonjour already.
- Point your browser to http://esp8266.local, you should see a response.
*/
#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <WiFiClient.h>
#ifndef STASSID
#define STASSID "your-ssid"
#define STAPSK "your-password"
#endif
const char* ssid = STASSID;
const char* password = STAPSK;
// TCP server at port 80 will respond to HTTP requests
WiFiServer server(80);
void setup(void) {
Serial.begin(115200);
// Connect to WiFi network
WiFi.mode(WIFI_STA);
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: ");
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();
Serial.println("TCP server started");
// Add service to MDNS-SD
MDNS.addService("http", "tcp", 80);
}
void loop(void) {
MDNS.update();
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
Serial.println("");
Serial.println("New client");
// Wait for data from client to become available
while (client.connected() && !client.available()) {
delay(1);
}
// Read the first line of HTTP request
String req = client.readStringUntil('\r');
// First line of HTTP request looks like "GET /path HTTP/1.1"
// Retrieve the "/path" part by finding the spaces
int addr_start = req.indexOf(' ');
int addr_end = req.indexOf(' ', addr_start + 1);
if (addr_start == -1 || addr_end == -1) {
Serial.print("Invalid request: ");
Serial.println(req);
return;
}
req = req.substring(addr_start + 1, addr_end);
Serial.print("Request: ");
Serial.println(req);
client.flush();
String s;
if (req == "/") {
IPAddress ip = WiFi.localIP();
String ipStr = String(ip[0]) + '.' + String(ip[1]) + '.' + String(ip[2]) + '.' + String(ip[3]);
s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>Hello from ESP8266 at ";
s += ipStr;
s += "</html>\r\n\r\n";
Serial.println("Sending 200");
} else {
s = "HTTP/1.1 404 Not Found\r\n\r\n";
Serial.println("Sending 404");
}
client.print(s);
Serial.println("Done with client");
}
（實例三） 自己STA連WIFI
在代碼中，我們將包含一個額外的庫
# include <ESP8266mDNS.h>
在該 庫中，我們現在可以訪問一個 名為 MDNS 響應器的類， 我們將使用它來聲明一個對象。
MDNSResponder mdns;
使用此 對象，我們可以使用 begin方法創建我們將使用的 Web地址，並將其命名為“esp-01”。此方法需要的第二個參數是我們可以使用Wi-Fi對象的本地IP方法使用的Esp8266的IP地址。
mdns.begin（“esp-01”，Wifi.localIP（））;
添加一個條件語句，當它 評估為true時，它會向用戶
打印一條 消息，說 “M
DNS 響應者已啟動！”。
最后， 使用MDNS 內置對象調用Add
service 方法
MDNS.addService（ “HTTP”， “TCP”， “80”）;
這需要三個參數。牛逼HESE參數描述的類型 ，我們要在廣播服務 網絡。在這種情況下，我們將在80上使用HTTP over TCP。
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
ESP8266WebServer server;
char* ssid = "YOUR_SSID";
char* password = "YOUR_PASSWORD";
MDNSResponder mdns;
void setup()
{
WiFi.begin(ssid,password);
Serial.begin(115200);
while(WiFi.status()!=WL_CONNECTED)
{
Serial.print(".");
delay(500);
}
Serial.println("");
Serial.print("IP Address: ");
Serial.println(WiFi.localIP());
if (mdns.begin("esp8266-01", WiFi.localIP()))
Serial.println("MDNS responder started");
server.on("/",[](){server.send(200,"text/plain","Hello World!");});
server.begin();
MDNS.addService("http", "tcp", 80);}
void loop()
{
server.handleClient();
}