程序运行截图如下：
低位：
对应的演示：
熄灯：
源码如下：
#include <ESP8266WiFi.h>const char* ssid = "FAST_8482";const char* password = "123456";WiFiServer server(80);void setup() {Serial.begin(115200);delay(10);pinMode(2, OUTPUT);digitalWrite(2, 0);Serial.println();Serial.println();Serial.print("Connecting to ");Serial.println(ssid);WiFi.mode(WIFI_STA);WiFi.begin(ssid, password);while (WiFi.status() != WL_CONNECTED) {delay(500);Serial.print(".");}Serial.println("");Serial.println("WiFi connected");// Start the serverserver.begin();Serial.println("Server started");// Print the IP addressSerial.println(WiFi.localIP());}void loop() {//判断是否有客户端连接WiFiClient client = server.available();if (!client) {return;}//等待用户发送数据Serial.println("new client");while(!client.available()){delay(1);}//获取数据String req = client.readStringUntil('\r');Serial.println(req);client.flush();//匹配int val;if (req.indexOf("/gpio/0") != -1)val = 0;else if (req.indexOf("/gpio/1") != -1)val = 1;else {Serial.println("invalid request");client.stop();return;}digitalWrite(2, val);client.flush();//设置响应String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\nGPIO is now ";s += (val)?"high":"low";s += "</html>\n";// Send the response to the clientclient.print(s);delay(1);Serial.println("Client disonnected");// client将会被释放// 当这个函数结束后client连接将会被消耗}
