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Wemos D1 ESP8266的网络工作模式

STA 模式：此时ESP8266模块是终端，可连接室内路由、手机热点或者AP热点 
模块连接AP热点，可与其进行双向数据通信 
模块连接手机热点，可与手机上的网络调试助手通信 
模块连接路由器，可以在当前网络下的PC或者手机的网络调试助手通信 
也可以通过路由接入互联网，从而手机或电脑通过互联网实现对设备的远程控制 
AP 模式： ESP8266的默认模式，此时模块作为热点，实现手机的直接连接、STA模块的直接连接或电脑直接与模块通信，实现局域网无线通信。 
STA+AP 模式：两种模式的共存模式，（ STA 模式） 即可以通过路由器连接到互联网，并通过互联网控制设备；（ AP 模式）即作为 wifi 热点，其他 wifi 设备连接到模块。这样实现局域网和广域网的无缝切换，方便操作。

 

 STA模式下进行TCP Client通信

 

 TCP Client

 1 #include <ESP8266WiFi.h>
 2  
 3 char* ssid = "your_wifi";
 4 char* passwd = "your_passwd";
 5 const uint16_t port = 8089;
 6 const char * host = "192.168.1.7"; //  your_Serverip
 7 WiFiClient client;
 8  
 9 void setup() {
10  Serial.begin(115200);
11  WiFi.mode(WIFI_STA);
12  WiFi.begin(ssid, passwd);
13  
14  Serial.println("connecting to router... ");
15     //等待wifi连接成功
16  while (WiFi.status() != WL_CONNECTED) {
17  Serial.print(".");
18  delay(500);
19     }
20  Serial.println("");
21  Serial.print("WiFi connected, local IP address:");
22  Serial.println(WiFi.localIP());
23  
24  delay(500);
25  Serial.print("connecting to ");
26  Serial.println(host);
27  if (!client.connect(host, port)) {
28  Serial.println("connection failed");
29  Serial.println("wait 5 sec...");
30  delay(5000);
31  return;
32     }else
33     {
34  Serial.println("connect to tcp server success.");
35  Serial.println("Send this data to tcp server");
36  client.println(String("hello tcp server"));
37     }
38 }
39  
40 void loop() {
41     //读取从tcp server返回到响应数据
42     String recv_data = client.readStringUntil('\r');
43  Serial.println(recv_data);
44  
45  if (0 == recv_data.compareTo("exit"))
46     {
47  Serial.println("closing connection");
48  client.stop();
49     }
50  delay(200);
51 }
STA_WifiClient

 

 STA模式下进行TCP Server通信

 

 TcpServer

 注意:设置CLIENTS_MAX_NUMS 大小，ESP8266最多支持5路Client同时连接。

 1 #include <ESP8266WiFi.h>
 2 #include <WiFiClient.h> 
 3 #include <WiFiServer.h>
 4 #define CLIENTS_MAX_NUMS  4
 5 /* Set these to your desired credentials. */
 6 const char *ssid = "your_wifi";
 7 const char *password = "your_passwd";
 8 WiFiServer server(8089);
 9 WiFiClient serverClients[CLIENTS_MAX_NUMS];
10 void setup() {
11  Serial.begin(115200);
12  WiFi.begin(ssid, password);
13  Serial.println("\r\nconnecting to router... ");
14     //等待wifi连接成功
15  while (WiFi.status() != WL_CONNECTED) {
16  Serial.print(".");
17  delay(500);
18     }
19  Serial.println("");
20  Serial.print("WiFi connected, local IP address:");
21  Serial.println(WiFi.localIP());
22  
23  delay(500);
24  Serial.println("Start tcp server...");
25  server.begin();
26  server.setNoDelay(true);
27 }
28 void loop() {
29  int i = 0;
30  if (server.hasClient())
31     {
32  for (i = 0; i < CLIENTS_MAX_NUMS; i++)
33         {
34  if (!serverClients[i] || !serverClients[i].connected())
35             {
36  if (serverClients[i])
37                 {
38  serverClients[i].stop();
39                 }
40  serverClients[i] = server.available();
41  continue;
42             }
43         }
44     }
45  for (i = 0; i < CLIENTS_MAX_NUMS; i++)
46     {
47  if (serverClients[i] && serverClients[i].connected())
48         {
49  if (serverClients[i].available())
50             {
51  while (serverClients[i].available()) 
52                 {
53                     String recv_data = serverClients[i].readStringUntil('\r');
54  Serial.println("recv data from tcp server:");
55  Serial.println(recv_data);
56                     // send back
57  serverClients[i].println(recv_data);
58                 }
59             }
60         }
61     }
62  delay(50);
63 }
STA_WifiServer

 

 

 STA模式下进行HTTPClient通信

 

 

 

 HTTPClient 获取深圳天气

 1 #include <Arduino.h>
 2 #include <ESP8266WiFi.h>
 3 #include <ESP8266HTTPClient.h>
 4 
 5 char* ssid = "your_wifi";
 6 char* passwd = "your_passwd";
 7 
 8 const uint16_t port = 80;
 9 const char * host = "https://api.seniverse.com/v3/weather/now.json?key=SwwwfskBjB6fHVRon&location=shenzhen&language=zh-Hans&unit=c";//注：key为作者所有，仅供测试用途！如需商用，请到有关网站申请
10  HTTPClient http;
11 
12 void setup() {
13    //在这里加入初始化相关代码，只运行一次:
14    Serial.begin(115200);
15 
16    WiFi.mode(WIFI_STA);
17    WiFi.begin(ssid, passwd);
18 
19    Serial.println("connecting to router... ");
20    //等待wifi连接成功
21    while (WiFi.status() != WL_CONNECTED) {
22       Serial.print(".");
23       delay(500);
24    }
25    Serial.println("");
26 
27    Serial.print("WiFi connected, local IP address:");
28    Serial.println(WiFi.localIP());
29 
30    Serial.print("[HTTP] begin...\n");
31 
32    http.begin(host); //HTTP
33 
34     delay(500);
35 }
36 
37 void loop() {
38   if (WiFi.status() == WL_CONNECTED)
39   {
40       // start connection and send HTTP header
41       int httpCode = http.GET();
42       if(httpCode) {
43          // HTTP header has been send and Server response header has been handled
44          Serial.printf("[HTTP] GET... code: %d\n", httpCode);
45          // file found at server
46          if(httpCode == 200) {
47                String payload = http.getString();
48                Serial.println(payload);
49          }
50       } else {
51          Serial.print("[HTTP] GET... failed, no connection or no HTTP server\n");
52       }
53     }
54 
55     delay(5000);
56 }
STA_HTTPClient

 

 STA模式下进行HTTPServer通信

 

 

 

 

 HTTPServer

 1 #include <ESP8266WiFi.h>
 2 #include <ESP8266WebServer.h>
 3  
 4 //设置您的WiFi接入信息
 5 const char* ssid = "your_wifi";
 6 const char* password = "your_passwd";
 7  
 8 ESP8266WebServer server(80);
 9  
10 //自定义主页访问处理函数
11 void homepage() {
12   server.send(200, "text/plain", "test homepage !");
13   Serial.println("用户访问了主页");
14 }
15  
16 void setup(void) {
17   //初始化串口
18   Serial.begin(115200);
19   Serial.println("");
20  
21   //初始化网络
22   WiFi.mode(WIFI_STA);
23   WiFi.begin(ssid, password);
24   while (WiFi.status() != WL_CONNECTED) {
25     delay(500);
26     Serial.print(".");
27   }
28   Serial.println("");
29   Serial.print("IP Address: ");
30   Serial.println(WiFi.localIP());
31  
32   //初始化WebServer
33   server.on("/", homepage);
34   server.begin();
35   Serial.println("HTTP server started");
36 }
37  
38 void loop(void) {
39   //监听客户请求并处理
40   server.handleClient();
41 }
HTTPServer

STA HTTPServer 点亮板载LED

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
 
/*Put your SSID & Password*/
const char* ssid = "your_wifi";  // Enter SSID here
const char* password = "your_passward";  //Enter Password here
 
ESP8266WebServer server(80);
 
uint8_t LEDpin = D9;
bool LEDstatus = LOW;
 
void setup() {
  Serial.begin(115200);
  delay(100);
  pinMode(LEDpin, OUTPUT);
 
  Serial.println("Connecting to ");
  Serial.println(ssid);
 
  //connect to your local wi-fi network
  WiFi.begin(ssid, password);
 
  //check wi-fi is connected to wi-fi network
  while (WiFi.status() != WL_CONNECTED) {
  delay(1000);
  Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected..!");
  Serial.print("Got IP: ");  Serial.println(WiFi.localIP());
 
  server.on("/", handle_OnConnect);
  server.on("/ledon", handle_ledon);
  server.on("/ledoff", handle_ledoff);
  server.onNotFound(handle_NotFound);
 
  server.begin();
  Serial.println("HTTP server started");
}
void loop() {
  server.handleClient();
  if(LEDstatus)
  digitalWrite(LEDpin, HIGH);
  else
  digitalWrite(LEDpin, LOW);
}
 
void handle_OnConnect() {
  LEDstatus = LOW;
  server.send(200, "text/html", SendHTML(false)); 
}
 
void handle_ledon() {
  LEDstatus = HIGH;
  server.send(200, "text/html", SendHTML(true)); 
}
 
void handle_ledoff() {
  LEDstatus = LOW;
  server.send(200, "text/html", SendHTML(false)); 
}
 
void handle_NotFound(){
  server.send(404, "text/plain", "Not found");
}
 
String SendHTML(uint8_t led){
  String ptr = "<!DOCTYPE html>\n";
  ptr +="<html>\n";
  ptr +="<head>\n";
  ptr +="<title>LED Control</title>\n";
  ptr +="</head>\n";
  ptr +="<body>\n";
  ptr +="<h1>LED</h1>\n";
  ptr +="<p>Click to switch LED on and off.</p>\n";
  ptr +="<form method=\"get\">\n";
  if(led)
  ptr +="<input type=\"button\" value=\"LED OFF\" onclick=\"window.location.href='/ledoff'\">\n";
  else
  ptr +="<input type=\"button\" value=\"LED ON\" onclick=\"window.location.href='/ledon'\">\n";
  ptr +="</form>\n";
  ptr +="</body>\n";
  ptr +="</html>\n";
  return ptr;
}
STA_HTTPServer

 

 

 

 AP HTTPServer 点亮板载LED

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
 
/* Put your SSID & Password */
const char* ssid = "nodeMCU";  // Enter SSID here
const char* password = "applink12345";  //Enter Password here
 
/* Put IP Address details */
IPAddress local_ip(192,168,2,1);
IPAddress gateway(192,168,2,1);
IPAddress subnet(255,255,255,0);
 
ESP8266WebServer server(80);
 
uint8_t LEDpin = D9;
bool LEDstatus = LOW;
 
void setup() {
  Serial.begin(115200);
  pinMode(LEDpin, OUTPUT);
  WiFi.softAP(ssid, password);
  WiFi.softAPConfig(local_ip, gateway, subnet);
  delay(100);
  Serial.println(local_ip);
  server.on("/", handle_OnConnect);
  server.on("/ledon", handle_ledon);
  server.on("/ledoff", handle_ledoff);
  server.onNotFound(handle_NotFound);
 
  server.begin();
  Serial.println("HTTP server started");
}
void loop() {
  server.handleClient();
  if(LEDstatus)
  digitalWrite(LEDpin, HIGH);
  else
  digitalWrite(LEDpin, LOW);
}
 
void handle_OnConnect() {
  LEDstatus = LOW;
  server.send(200, "text/html", SendHTML(false)); 
}
 
void handle_ledon() {
  LEDstatus = HIGH;
  server.send(200, "text/html", SendHTML(true)); 
}
 
void handle_ledoff() {
  LEDstatus = LOW;
  server.send(200, "text/html", SendHTML(false)); 
}
 
void handle_NotFound(){
  server.send(404, "text/plain", "Not found");
}
 
String SendHTML(uint8_t led){
  String ptr = "<!DOCTYPE html>\n";
  ptr +="<html>\n";
  ptr +="<head>\n";
  ptr +="<title>LED Control</title>\n";
  ptr +="</head>\n";
  ptr +="<body>\n";
  ptr +="<h1>LED</h1>\n";
  ptr +="<p>Click to switch LED on and off.</p>\n";
  ptr +="<form method=\"get\">\n";
  if(led)
  ptr +="<input type=\"button\" value=\"LED OFF\" onclick=\"window.location.href='/ledoff'\">\n";
  else
  ptr +="<input type=\"button\" value=\"LED ON\" onclick=\"window.location.href='/ledon'\">\n";
  ptr +="</form>\n";
  ptr +="</body>\n";
  ptr +="</html>\n";
  return ptr;
}
AP_HTTPServer

 

 

 

 

 

 

 1 #include <ESP8266WiFi.h>
 2 const char *ssid = "ESP8266 Website";
 3 const char *password = "12345678";
 4 WiFiServer server(80);
 5 void setup()
 6 {
 7   Serial.begin(115200);
 8   Serial.println();
 9   Serial.print("Setting soft-AP ... ");
10      
11   IPAddress softLocal(192,168,1,1); 
12   IPAddress softGateway(192,168,1,1);
13   IPAddress softSubnet(255,255,255,0);
14    
15   WiFi.softAPConfig(softLocal, softGateway, softSubnet); 
16   WiFi.softAP(ssid, password);
17      
18   IPAddress myIP = WiFi.softAPIP();
19   Serial.print("AP IP address: ");
20   Serial.println(myIP);
21  server.begin();
22  Serial.printf("Web server started, open %s in a web browser\n", WiFi.softAPIP().toString().c_str());
23 }
24 void loop()
25 {
26  WiFiClient client = server.available();
27  if (client)
28   {
29     Serial.println("\n[Client connected]");
30     while (client.connected())
31     {
32       if (client.available())
33       {
34        //  String line = client.readStringUntil(13);// arduino换行符号  ascll码 13
35         String line = client.readStringUntil('\r');
36         Serial.println(line);   
37         // wait for end of client's request, that is marked with an empty line
38         if (line.length() == 1 && line[0] == '\n'){
39           //返回响应内容
40           String htmlPage = String("HTTP/1.1 200 OK\r\n") +
41             "Content-Type: text/html\r\n" +
42             "Connection: close\r\n" +  // the connection will be closed after completion of the response
43             "Refresh: 5\r\n" +  // refresh the page automatically every 5 sec
44             "\r\n" +
45             "<!DOCTYPE HTML>" +
46             "<html><head><title>ESP8066 Website</title><link rel='icon' href='https://imuncle.github.io/images/avatar.jpg'><meta charset='utf-8'></head>" +
47             "<body><h1>Hello World!</h1><p>本网页由ESP8266模块展示</p><p>Designed by big_uncle</p></body>" +
48             "</html>" +
49             "\r\n";
50           client.println(htmlPage);
51           break;
52         }
53       }
54     }
55     delay(500);
56   
57     client.stop();
58     Serial.println("[Client disonnected]");
59   }
60  }
AP热点

 

posted on 2021-08-14 16:06  荣林  阅读(610)  评论(0)  编辑  收藏  举报

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