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ESP8266(NodeMcu Lua)学习 (2)WIFI控制led灯(WiFiHTTPSServer)

2019-02-17 20:54 2136 查看

(二)WiFi控制led灯

1、打开示例->ESP8266WIFI->WiFiwebServer;

没有的话,直接复制下面的代码吧!

2、代码如下:

/*
*  This sketch demonstrates how to set up a simple HTTP-like server.
*  The server will set a GPIO pin depending on the request
*    **http://server_ip/?gpio=0** will set the GPIO2 low,
*    **http://server_ip/?gpio=1** will set the GPIO2 high
*  server_ip is the IP address of the ESP8266 module, will be
*  printed to Serial when the module is connected.
*/

#include <ESP8266WiFi.h>

const char* ssid = "your wifi";
const char* password = "123456";

// Create an instance of the server
// specify the port to listen on as an argument
WiFiServer server(80);//开启板子的port 80

void setup() {
Serial.begin(115200);//开启端口,速度为115200
delay(10);

// prepare GPIO2
pinMode(2, OUTPUT);//2号脚位定为输出,即D4脚位
digitalWrite(2, 0);

// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);

WiFi.begin(ssid, password);//使用WiFi开始连线

while (WiFi.status() != WL_CONNECTED) {//连线成功后停止跳点
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");

// Start the server
server.begin();
Serial.println("Server started");

// Print the IP address
Serial.println(WiFi.localIP());
}

void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}

// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}

// Read the first line of the request
String req = client.readStringUntil('\r');
Serial.println(req);//打印出收到的讯息
client.flush();//流刷新,如果不flush,那么可能就堵塞了

// 比对收到的讯息,确定执行什么操作
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;
}

// Set GPIO2 according to the request
digitalWrite(2, val);

client.flush();//刷新

// Prepare the response
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 client
client.print(s);
delay(1);
Serial.println("Client disonnected");

// The client will actually be disconnected
// when the function returns and 'client' object is detroyed
}

烧录上去,打开串口监听窗口,记录分配到的IP地址(我的是192.168.0.104);

The server will set a GPIO pin depending on the request
https://server_ip/?gpio=0 will set the GPIO2 low,
https://server_ip/?gpio=1 will set the GPIO2 high

在同一局域网下的手机电脑,浏览器中输入https://server_ip/?gpio=0 致D4脚位为低电平;’
输入https://server_ip/?gpio=1则使D4脚位为高电平,点亮led;server_ip就是串口监听器的打印的IP地址(例如我的就是:https://192.168.0.105/?gpio=1 点亮led)!

输入192.168.0.104/?gpio=1

此时网页显示led已点亮;

输入192.168.0.104/?gpio=0


此时led熄灭!

不妨将网址生成二维码,这样就能实现扫码开灯了(要在同一局域网下)!

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