c++ - ESP32 转 ESP32 WiFi 服务器/客户端问题

Question

我有一个 ESP32 作为客户端，另一个 ESP32 作为直接通信和户外使用的接入点。我已经在 AP 端设置了一个服务器，并希望客户端与其通信，但我似乎无法完成这项工作。

我想知道两件事:

1. 如何从客户端向服务器发送或写入数据？
2. 如何读取并显示从客户端发送到服务器的数据？

我已附上以下代码:

AP/服务器代码

//SERVER
//Load Wi-Fi library
#include <WiFi.h>

// Replace with your network credentials
const char* ssid     = "ESP32-Access-Point";
const char* password = "SyedAhmedAli";
 //Set web server port number to 80

WiFiServer server(80);


void setup() {
  Serial.begin(115200);
  Serial.println("Setting AP (Access Point)…");

  WiFi.softAP(ssid, password);  

  IPAddress IP = WiFi.softAPIP();
  Serial.print("AP IP address ");
  Serial.println(IP);
  Serial.print("MAC address ");
  Serial.println(WiFi.softAPmacAddress());

  server.begin();

}

void loop(){

  WiFiClient client = server.available();    //Listen for incoming clients

  if (client) 
  {                                          //If a new client connects,
    Serial.println("New Client.");           //print a message out in the serial port





    while (client.connected()) 
    {           
    Serial.println("Client connected.");
    Serial.println(client.available());

     if (client.available() > 0) 
     {
      // read the bytes incoming from the client:
      char thisChar = client.read();
      // echo the bytes back to the client:
      server.write(thisChar);
      // echo the bytes to the server as well:
      Serial.write(thisChar);
     }


    }
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println();
  }
}

客户端代码

//Client
#include <WiFi.h>

const char* ssid = "ESP32-Access-Point";
const char* password =  "SyedAhmedAli";


WiFiClient client;

IPAddress server(192, 168, 4, 1);    

void setup()
{
  Serial.begin(115200);
  Serial.println();

  Serial.printf("Connecting to %s ", ssid);
  WiFi.begin(ssid, password);
   while (WiFi.status() != WL_CONNECTED)
   {
    delay(500);
    Serial.print(".");
   }
    Serial.println(" connected");
     if(client.connect(server, 80))
      {
        Serial.println("connected to server");
        client.write("Data");
      }
     else
     {
        Serial.println("failed to connect to server");
     }

}


void loop()
{

}

Answer 1

除了前面的答案，您可以使用 espnow 作为各种 esp32 之间的协议(protocol)。这里是example .