ESP8266编译错误 [D2 未在此范围内声明]是什么原因造成的？

我是 ESP8266 的新手，我试图从这个网站运行我的第一个程序：我安装了所有库，连接了 ESP8266 并安装了驱动程序。我得到这个错误：Arduino:1.8.16 (Windows 10), Płytka:"Generic ESP8266 Module, 80 MHz, Flash, Disabled (new aborts on oom), Disabled, All SSL ciphers (most compatible), 32KB cache + 32KB IRAM （平衡），对 IRAM/PROGMEM 使用 pgm_read 宏，dtr（aka nodemcu），26 MHz，40MHz，DOUT（兼容），1MB（FS：64KB OTA：~470KB），2，nonos-sdk 2.2.1 + 100（ 190703), v2 Lower Memory, Disabled, None, Only Sketch, 115200"


在包含的文件中 c:\users\marcin\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\3.0.4-gcc10.3-1757bed\xtensa-lx106-elf\include\assert .h:10，
                 来自 c:\users\marcin\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\3.0.4-gcc10.3-1757bed\xtensa-lx106-elf\include \sys\reent.h:503，
                 来自 c:\users\marcin\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\3.0.4-gcc10.3-1757bed\xtensa-lx106 -elf\include\stdlib.h:18，
                 来自 c:\users\marcin\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\3.0.4-gcc10.3-1757bed\xtensa -lx106-elf\include\c++\10.3.0\cstdlib:75,
                 来自 c:\users\marcin\appdata\local\arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\3.0.4-gcc10.3-1757bed\xtensa-lx106-elf\include\c++\10.3。 0\stdlib.h:36，
                 来自 C:\Users\Marcin\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/Arduino.h:27，来自 sketch\
                 8266kod_v1.ino .cpp:1:
C:\Users\Marcin\Documents\Arduino\libraries\WhareHauoraWiFiManager/WiFiManager.h:25:24: error: 'const char HTTP_HEAD []' 重新声明为不同类型的实体 25
   | const char HTTP_HEAD[] PROGMEM = "{v}";
      | ^~~~~~~
在 C:\Users\Marcin\Desktop\8266kod_v1\8266kod_v1.ino:5 中包含的文件中：
C:\Users\Marcin\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\ESP8266WebServer\ src/ESP8266WebServer.h:47:39: 注意：之前的声明 'HTTPMethod HTTP_HEAD'
   47 | 枚举 HTTPMethod { HTTP_ANY, HTTP_GET, HTTP_HEAD, HTTP_POST, HTTP_PUT, HTTP_PATCH, HTTP_DELETE, HTTP_OPTIONS };
      | ^~~~~~~~~
C:\Users\Marcin\Desktop\8266kod_v1\8266kod_v1.ino: 在函数 'void callback(char*, byte*, unsigned int)':
8266kod_v1:11:13: error: ' D2' 未在此范围内声明
   11 | #define LED D2
      | ^~
C:\Users\Marcin\Desktop\8266kod_v1\8266kod_v1.ino:40:20: 注意：在宏扩展中 '
   40 | 数字写入（LED，高）；
      | ^~~
8266kod_v1:11:13: 错误：'D2' 未在此范围内声明
   11 | #define LED D2
      | ^~
C:\Users\Marcin\Desktop\8266kod_v1\8266kod_v1.ino:44:20: 注意：在宏“LED”
   44 的扩展中 | 数字写入（LED，低）；
      | ^~~
C:\Users\Marcin\Desktop\8266kod_v1\8266kod_v1.ino: In function 'void setup()':
8266kod_v1:11:13: error: 'D2' 未在此范围内声明
   11 | #define LED D2
      | ^~
C:\Users\Marcin\Desktop\8266kod_v1\8266kod_v1.ino:57:11：注意：在宏“LED”
   57 的扩展中 | 引脚模式（LED，输出）；
      | ^~~
exit status 1
'D2' was not declared in this scope
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代码：全选#include           //https://github.com/esp8266/Arduino

//needed for library
#include
#include
#include          //https://github.com/tzapu/WiFiManager
#include
#include

#define DHTPIN 5 // Digital pin connected to the DHT sensor
#define LED D2
// Uncomment the type of sensor in use:
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT22 // DHT 22 (AM2302)
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
DHT dht(DHTPIN, DHTTYPE);

unsigned long previousMillis = 0;
unsigned long interval = 10000;

const char* mqttServer = "192.168.0.81";
const int mqttPort = 1883;

void callback(char* topic, byte* payload, unsigned int length) {

  Serial.print("Message arrived in topic: ");
  Serial.println(topic);

  Serial.print("Message:");
    Serial.println();
   
  String message = "";
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload);
    message+=(char)payload;
  }
  Serial.println("-----------------------");
  if(String(topic)=="LED"){
    if(message=="LED ON"){
      digitalWrite(LED,HIGH);
      Serial.println("LED IS ON");
    }
    else{
      digitalWrite(LED,LOW);
    }
  }
     
}

WiFiClient espClient;
PubSubClient client(mqttServer, mqttPort, callback, espClient);


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(LED,OUTPUT);
  digitalWrite(LED,LOW);
  //WiFiManager
  //Local intialization. Once its business is done, there is no need to keep it around
  WiFiManager wifiManager;
  //reset saved settings
// wifiManager.resetSettings();

  //set custom ip for portal
  //wifiManager.setAPStaticIPConfig(IPAddress(10,0,1,1), IPAddress(10,0,1,1), IPAddress(255,255,255,0));

  //fetches ssid and pass from eeprom and tries to connect
  //if it does not connect it starts an access point with the specified name
  //here  "AutoConnectAP"
  //and goes into a blocking loop awaiting configuration
  wifiManager.autoConnect("AutoConnectAP");
  //or use this for auto generated name ESP + ChipID
  //wifiManager.autoConnect();


  //if you get here you have connected to the WiFi
  Serial.println("connected...yeey :)");
  dht.begin();
  client.setServer(mqttServer, mqttPort);
  client.setCallback(callback);
    while (!client.connected()) {
    Serial.println("Connecting to MQTT...");

    if (client.connect("ESP8266Client" )) {
      client.subscribe("LED");
      Serial.println("connected");

    } else {

      Serial.print("failed with state ");
      Serial.print(client.state());
      delay(2000);

    }
}
}

void loop() {
    client.loop();
unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    // save the last time you updated the DHT values
    previousMillis = currentMillis;
    float t = dht.readTemperature();
    float h = dht.readHumidity();
    if(!isnan(h)&&!isnan(t)){
      Serial.println("Temperature : " +String(t));
      Serial.println("Humidity : " +String(h));
      String toSend = String(t) + "," +String(h);
      client.publish("data",toSend.c_str());
    }

  }
}


是什么导致了这个问题？我该如何修复它？

               


                        

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