【Ardiuno】使用ESP32单片机创建web服务通过网页控制小灯开关的实验（图文）

经过实验测试ESP32单片机的网络连接还是很方便的，这里小飞鱼按照程序实例的代码亲自实验一下使用Esp32生成的网页服务来实现远程无线控制小灯开关功能，这样真的是离物联网开发越来越近了，哈哈！

连接好开发板和电路，将小灯正极连接在5号针脚上，接好负极。

程序代码：

#include <WiFi.h>const char* ssid     = "XIAOFEIYU";
const char* password = "XIAOFEIYU666";WiFiServer server(80);void setup()
{Serial.begin(9600);pinMode(5, OUTPUT);      // set the LED pin modedelay(10);// We start by connecting to a WiFi networkSerial.println();Serial.println();Serial.print("Connecting to ");Serial.println(ssid);WiFi.begin(ssid, password);while (WiFi.status() != WL_CONNECTED) {delay(500);Serial.print(".");}Serial.println("");Serial.println("WiFi connected.");Serial.println("IP address: ");Serial.println(WiFi.localIP());server.begin();//==========================================================================pinMode(2, OUTPUT);digitalWrite(2, HIGH);delay(500);digitalWrite(2, LOW);delay(500); digitalWrite(2, HIGH);delay(500);digitalWrite(2, LOW);delay(500); digitalWrite(2, HIGH);delay(2500);digitalWrite(2, LOW);
}void loop(){WiFiClient client = server.available();   if (client) {                            Serial.println("New Client.");           String currentLine = "";                while (client.connected()) {            if (client.available()) {             char c = client.read();            if (c == '\n') {                    if (currentLine.length() == 0) {client.println("HTTP/1.1 200 OK");client.println("Content-type:text/html");client.println();// the content of the HTTP response follows the header:client.print("Click <a href=\"/H\">here</a> to turn the LED on pin 5 on.<br>");client.print("Click <a href=\"/L\">here</a> to turn the LED on pin 5 off.<br>");client.println();            break;} else {    currentLine = "";}} else if (c != '\r') {  currentLine += c;      }// Check to see if the client request was "GET /H" or "GET /L":if (currentLine.endsWith("GET /H")) {Serial.println("GET /H");digitalWrite(5, HIGH);               // GET /H  开灯}if (currentLine.endsWith("GET /L")) {Serial.println("GET /L");digitalWrite(5, LOW);                // GET /L  关灯}}}// close the connection:client.stop();Serial.println("Client Disconnected.");}
}

先打开串口监视器，然后编译程序上传到开发板，从串口服务器上查看到开发板的ip：192.168.199.207。

打开浏览器，输入网址可以查看到一个web页面