如何用ESP8266创建TCP server? [英] how create TCP server by ESP8266?

问题描述

我想通过ESP8266在Arduino IDE中创建一个简单的Wifi TCP服务器.但是我有一个大问题:当我从客户端发送字符或字符串时，我无法在服务器上接收到它.

I want to create a simple Wifi TCP server by ESP8266 in Arduino IDE. But I have a big problem: when I send a character or string from client I can't receive it on the server.

实际上我将esp8266连接到我的PC，我想在PC终端中查看来自客户端的发送字符. 我的发送方是android的Socket协议应用！我在服务器端编写的完整代码是:

In fact I connect esp8266 to my PC and I want to see send character from client in pc terminal. my sending side is Socket protocol app for android!and complete code I write in sever side is:

WiFiServer server(8888);
void setup() 
{
  initHardware();
  setupWiFi();
  server.begin();
}
void loop() 
{
  WiFiClient client = server.available();
  if (client) {
    if (client.available() > 0) {
      char c = client.read();
      Serial.write(c);
    }
  }
}
void setupWiFi()
{
  WiFi.mode(WIFI_AP);
  WiFi.softAP("RControl", WiFiAPPSK);
}

void initHardware()
{
  Serial.begin(115200);
}

将两侧波特率设置为115200.

Baudrate it set to 115200 on both sides.

推荐答案

在循环中，一旦建立客户端连接并删除WiFiClient对象，您将关闭该客户端连接.

In the loop, you are closing the client connection as soon as it is established deleting the WiFiClient object.

为了保持连接打开，您可以像这样修改循环:

In order to keep the connection open you could modify the loop like this :

WiFiClient client;
void loop() 
{
    if (!client.connected()) {
        // try to connect to a new client
        client = server.available();
    } else {
        // read data from the connected client
        if (client.available() > 0) {
            Serial.write(client.read());
        }
    }
}

未连接客户端时，它将尝试连接一个客户端；当连接客户端时，它将读取传入的数据.

When client is not connected it tries to connect one and when a client is connected, it reads incoming data.

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