Question

我有2个ESP32板，我想在Arduino IDE中使它们成为服务器/客户端。只有两块板，中间没有路由器。

到目前为止，我已经按照教程，我已经能够通过手机连接到ESP32。

#include <WiFi.h>
WiFiServer server;
const char *ssid = "Zupa";
const char *password = "12345678";
void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.print("Configuring access point...");

  WiFi.softAP(ssid, password);

  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);

}

void loop() {

}

但是，我无法从其他ESP32连接。代码如下：

#include <WiFi.h>
#include <WiFiMulti.h>

WiFiMulti WiFiMulti;

void setup()
{
    Serial.begin(115200);
    delay(10);
    enter code here
    // We start by connecting to a WiFi network
    WiFiMulti.addAP("Zupa", "12345678");

    Serial.println();
    Serial.println();
    Serial.print("Wait for WiFi... ");

    while(WiFiMulti.run() != WL_CONNECTED) {
        Serial.print(".");
        delay(500);
    }

    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());

    delay(500);
}


void loop()
{
    const uint16_t port = 80;
    const char * host = "192.168.1.4"; // ip 



    Serial.print("connecting to ");
    Serial.println(host);

    // Use WiFiClient class to create TCP connections
    WiFiClient client;

    if (!client.connect(host, port)) {
        Serial.println("connection failed");
        Serial.println("wait 5 sec...");
        delay(5000);
        return;
    }

    // This will send the request to the server
    client.print("Send this data to server");

    //read back one line from server
    String line = client.readStringUntil('\r');
    client.println(line);

    Serial.println("closing connection");
    client.stop();

    Serial.println("wait 5 sec...");
    delay(5000);
}

它发生的事情只是说无法连接。 IP地址是默认的，我在服务器端仔细检查了它！为什么我可以通过电话而不是ESP32连接？

此外，我将如何在两者之间进行沟通？我尝试在线阅读，但每个人似乎都打电话给ESP沟通，而不是ESP到ESP。我也曾尝试在ESP32上阅读Kolbans先生的书，但没有成功。我对此很陌生，感到困惑。

Answer 1

我要做的就是将WiFi库从ESP8266wifi.h更改为与ESP32兼容的Wifi.h。

（Source）

在代码示例中，只需更改代码即可满足您的特定需求。

Answer 2

#include <WiFi.h>
#include <WiFiClient.h>

void setup()
{
    Serial.begin(115200);
    delay(10);

    // We start by connecting to a WiFi network
    WiFi.mode(WIFI_STA); //Set wifi mode as station
    WiFi.begin("Zupa", "12345678");//Connect to other ESP32

    Serial.println();
    Serial.println();
    Serial.print("Wait for WiFi... ");

    //Wait for WiFi to connect
    while(WiFi.waitForConnectResult() != WL_CONNECTED){      
      Serial.print(".");
      delay(1000);
    }

    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());

    delay(500);
}


void loop()
{
    const uint16_t port = 80;
    const char * host = "192.168.1.4"; // ip 



    Serial.print("connecting to ");
    Serial.println(host);

    // Use WiFiClient class to create TCP connections
    WiFiClient client;

    if (!client.connect(host, port)) {
        Serial.println("connection failed");
        Serial.println("wait 5 sec...");
        delay(5000);
        return;
    }

    // This will send the request to the server
    client.print("Send this data to server");

    //read back one line from server
    String line = client.readStringUntil('\r');
    client.println(line);

    Serial.println("closing connection");
    client.stop();

    Serial.println("wait 5 sec...");
    delay(5000);
}

Answer 3

尝试将客户端代码的IP更改为：

const char * host =＆＃34; 192.168.4.1＆＃34;

提示：我使用Android或iOS中的Finger应用程序扫描网络，很高兴看到每台设备的IP连接。（在您的情况下，您需要在使用手指之前将移动设备连接到Esp32的热点）

ESP32接入点

3 个答案: