如何使用arduino串口显示nodemcu esp8266本端IP

Question

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这是我的arduino的序列，它没有显示任何东西，我在代码中做错了什么？Arduino代码

#include <SoftwareSerial.h>
    #include <ESP8266WiFi.h>
    #include <WiFiClient.h> 
    #include <ESP8266WebServer.h>

    const char* host = "WiFi_Robot4_NodeMCU";
    const char* ssid = "EarthQuakeBot";

    ESP8266WebServer server(80);

    void setup() {
      IPAddress ip;  
      Serial.begin(115200);
       ip = WiFi.localIP();
      Serial.println(ip);
    delay(100);
    // Connecting WiFi

      WiFi.mode(WIFI_AP);
      WiFi.softAP(ssid);
    // Starting WEB-server

         server.on ( "/", HTTP_handleRoot );
         server.onNotFound ( HTTP_handleRoot );
         server.begin();    

    }

    void loop() {

    }

如何用Arduino串口显示nodemcu esp8266的localIP？

Answer 1

代码没有延迟地工作，只需复制它(SoftwareSerial被注释掉，并添加了一行作为打印支持的文本，永远不要将延迟与Esps一起使用)：

    //#include <SoftwareSerial.h>
    #include <ESP8266WiFi.h>
    #include <WiFiClient.h>
    #include <ESP8266WebServer.h>

    const char* host = "WiFi_Robot4_NodeMCU";
    const char* ssid = "EarthQuakeBot";

    ESP8266WebServer server(80); 

    void HTTP_handleRoot() {
            // Some code here
            }

    void setup() {
      IPAddress ip;
      Serial.begin(115200);
      ip = WiFi.localIP();
      Serial.print("This is my ip: ");
      Serial.println(ip);

      // Connecting WiFi

      WiFi.mode(WIFI_AP);
      WiFi.softAP(ssid);
      // Starting WEB-server

      server.on ( "/", HTTP_handleRoot );
      server.onNotFound ( HTTP_handleRoot );
      server.begin();
    }

    void loop() {
    }

并显示(哦，想不到)以下内容：

This is my ip: 0.0.0.0

如果在AP_Mode中使用nodeMCU (作为接入点)，您必须分配所有相关的data yourself.Thereis noself分配函数，您可以这样做：

  Serial.begin(115200);
 .....    
   WiFi.softAPConfig(apIP, apGateway, apSubnet);
   WiFi.mode(WIFI_AP);
   WiFi.softAP(ssid);
 .........
   ip = WiFi.localIP();
   Serial.print("This is my ip: ");
   Serial.println(ip);

通读这些库示例并遵循如下的良好教程：https://tttapa.github.io/ESP8266/Chap01 - ESP8266.html希望这对您和其他初学者有帮助