esp8266 arduino 編譯出錯，請問是什么問題。

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程序：

#include #include
//=============  此處必須修該============
String DEVICEID="*****";//你的設備編號==改成你貝殼物聯里智能設備的ID
String APIKEY="*****";//設備密碼==改成你貝殼物聯里智能設備的密碼
const char* ssid="CMCC-hkws";//WiFi名稱  你的WIFI名稱
const char* password="147258369";//WiFi密碼 你的WIFI密碼
//=======================================
#define OUT 2//輸出控制繼電器端口 
//=======================================
unsigned long lastCheckInTime=0;//記錄上次報到時間
const unsigned long postingInterval=40000;//每隔40秒向服務器報到一次
const char* host="www.eqytg.org";
const int httpPort=8181;
WiFiClient client;
void setup()
{
  pinMode(OUT,OUTPUT);//設置輸出
  digitalWrite(OUT,LOW);//上電打開輸出
  pinMode(LED_BUILTIN,OUTPUT);//設備板載LED輸出模式
  digitalWrite(LED_BUILTIN,HIGH);//關閉LED 
  Serial.begin(115200);
  Serial.println();
  Serial.println();
  WiFi.begin(ssid,password);//連接WiFi  
  while(WiFi.status()!= WL_CONNECTED)//等待WiFi連接成功
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println(); 
}
void loop() 
{  
  // Use WiFiClient class to create TCP connections
  if(!client.connected())
  {
    if(!client.connect(host, httpPort)) 
    {
      Serial.println("connection failed");
      delay(5000);
      return;
    }
  }
  if(millis()-lastCheckInTime>postingInterval||lastCheckInTime==0)
    checkIn();

  // Read all the lines of the reply from server and print them to Serial
  if (client.available())
  {
    String inputString=client.readStringUntil('\n');
    inputString.trim();
    Serial.println(inputString);
    int len=inputString.length()+1;
    if(inputString.startsWith("{") && inputString.endsWith("}"))
    {
      char jsonString[len];
      inputString.toCharArray(jsonString,len);
      aJsonObject *msg = aJson.parse(jsonString);
      processMessage(msg);
      aJson.deleteItem(msg);          
    }
  }
}
void processMessage(aJsonObject *msg)
{
  aJsonObject* method=aJson.getObjectItem(msg,"M");
  aJsonObject* content=aJson.getObjectItem(msg,"C");     
  aJsonObject* client_id=aJson.getObjectItem(msg,"ID");
  if(!method)
    return; 
  String M=method->valuestring;
  if(M=="say")
  {  
    String C=content->valuestring;
    String F_C_ID=client_id->valuestring;
    digitalWrite(LED_BUILTIN,LOW);//接收到指令就閃一下LED
    delay(50);
    digitalWrite(LED_BUILTIN,HIGH); 
    if(C=="stop")                                     //接收到的是停止指令
    {
      digitalWrite(OUT,HIGH);//關閉
      sayToClient(F_C_ID,"LED All off!");        
    }

  if(C=="play")                                   //接收到的是停止指令//接收到的不是停止指令
    {
      digitalWrite(OUT,LOW);//打開
      sayToClient(F_C_ID,"LED All on!");    
    }
  }
}
void checkIn()
{
  String msg="{\"M\":\"checkin\",\"ID\":\"" + DEVICEID + "\",\"K\":\"" + APIKEY + "\"}\n";
  client.print(msg);
  lastCheckInTime=millis(); 
}
void sayToClient(String client_id, String content)
{
  String msg="{\"M\":\"say\",\"ID\":\"" + client_id + "\",\"C\":\"" + content + "\"}\n";
  client.print(msg);
  lastCheckInTime=millis();
}

錯誤信息：

Arduino:1.8.12 (Mac OS X), 開發板："NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Disabled, All SSL ciphers (most compatible), 4M (no SPIFFS), v2 Lower Memory, Disabled, None, Only Sketch, 115200"

sketch_dec03c:64:21: error: variable or field 'processMessage' declared void
 void processMessage(aJsonObject *msg)
                     ^
sketch_dec03c:64:21: error: 'aJsonObject' was not declared in this scope
sketch_dec03c:64:34: error: 'msg' was not declared in this scope
 void processMessage(aJsonObject *msg)
                                  ^
/Users/yyyy/Documents/Arduino/sketch_dec03c/sketch_dec03c.ino: In function 'void loop()':
sketch_dec03c:58:7: error: 'aJsonObject' was not declared in this scope
       aJsonObject *msg = aJson.parse(jsonString);
       ^
sketch_dec03c:58:20: error: 'msg' was not declared in this scope
       aJsonObject *msg = aJson.parse(jsonString);
                    ^
sketch_dec03c:58:26: error: 'aJson' was not declared in this scope
       aJsonObject *msg = aJson.parse(jsonString);
                          ^
sketch_dec03c:59:25: error: 'processMessage' was not declared in this scope
       processMessage(msg);
                         ^
/Users/yuanjiafu/Documents/Arduino/sketch_dec03c/sketch_dec03c.ino: At global scope:
sketch_dec03c:64:21: error: variable or field 'processMessage' declared void
 void processMessage(aJsonObject *msg)
                     ^
sketch_dec03c:64:21: error: 'aJsonObject' was not declared in this scope
sketch_dec03c:64:34: error: 'msg' was not declared in this scope
 void processMessage(aJsonObject *msg)
                                  ^
exit status 1
variable or field 'processMessage' declared void

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