Arduino+ESP8266wifi+html实现控制小灯
esp8266wifi灯控连线
继电器in口接D4口
串口打印（选择正确的波特率，我的第一行就是教训）
连接wifi，访问网页实现操作
代码
Arduino IDE代码 （为了方便我直接基于helloserver进行了修改）
#include
<ESP8266WiFi
.h
>
#include
<WiFiClient
.h
>
#include
<ESP8266WebServer
.h
>
#include
<ESP8266mDNS
.h
>
const char
* ssid
= "wifi名称";
const char
* password
= "wifi密码";
String html
= "<!DOCTYPE html><html> <head> <meta charset=\"utf-8\" /> <title></title> </head> <body> <a href=\"./pin?light=on\"><input type=\"button\" value=\"开灯\"></a> <a href=\"./pin?light=off\"><input type=\"button\" value=\"关灯\"></a> </body></html>";
void pin(){
if(server
.arg("light")=="on"{
digitalWrite(D4, LOW);
server
.send(200, "text/html",html
);
}else if(server
.arg("light"=="off"){
digitalWrite(D4, HIGH);
server
.send(200, "text/html",html
);
}
}
ESP8266WebServer
server(80);
const int led
= 13;
void handleRoot() {
digitalWrite(led
, 1);
server
.send(200, "text/html",html
);
digitalWrite(led
, 0);
}
void handleNotFound(){
digitalWrite(led
, 1);
String message
= "File Not Found\n\n";
message
+= "URI: ";
message
+= server
.uri();
message
+= "\nMethod: ";
message
+= (server
.method() == HTTP_GET)?"GET":"POST";
message
+= "\nArguments: ";
message
+= server
.args();
message
+= "\n";
for (uint8_t i
=0; i
<server
.args(); i
++){
message
+= " " + server
.argName(i
) + ": " + server
.arg(i
) + "\n";
}
server
.send(404, "text/plain", message
);
digitalWrite(led
, 0);
}
void setup(void){
pinMode(D4, OUTPUT);
digitalWrite(led
, 0);
Serial
.begin(115200);
WiFi
.begin(ssid
, password
);
Serial
.println("");
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());
if (MDNS.begin("esp8266")) {
Serial
.println("MDNS responder started");
}
server
.on("/", handleRoot
);
server
.on("/pin", HTTP_GET, pin
);
server
.on("/inline", [](){
server
.send(200, "text/plain", "this works as well");
});
server
.onNotFound(handleNotFound
);
server
.begin();
Serial
.println("HTTP server started");
}
void loop(void){
server
.handleClient();
}
html代码(压缩时需要在双引号前加“\”，或者用单引号替换)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>ControlPage</title>
</head>
<body>
<a href="./pin?light = on"><input type="开灯"></a>
<a href="./pin?light = "><input type="关灯"></a>
</body>
</html>
