ESP8266 Community Forum

Posted: **Thu Mar 02, 2017 9:49 pm**

Hi all,
I need help understanding what the error messages mean, so I can fix them.

Here's the error message from arduin ide:

Code: Select all

Arduino: 1.6.8 (Windows 7), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Serial, 115200, 4M (3M SPIFFS)"

In file included from C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:29:0:

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.h:25:0: warning: "UDP_TX_PACKET_MAX_SIZE" redefined [enabled by default]

 #define UDP_TX_PACKET_MAX_SIZE 24

 ^

In file included from C:\Program Files\Arduino\libraries\WiFi\src\utility/wifi_drv.h:26:0,

                 from C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:26:

C:\Users\Donovan\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.0.0\libraries\ESP8266WiFi\src/WiFiUdp.h:28:0: note: this is the location of the previous definition

 #define UDP_TX_PACKET_MAX_SIZE 8192

 ^

In file included from C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:29:0:

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.h:27:7: error: redefinition of 'class WiFiUDP'

 class WiFiUDP : public UDP {

       ^

In file included from C:\Program Files\Arduino\libraries\WiFi\src\utility/wifi_drv.h:26:0,

                 from C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:26:

C:\Users\Donovan\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.0.0\libraries\ESP8266WiFi\src/WiFiUdp.h:32:7: error: previous definition of 'class WiFiUDP'

 class WiFiUDP : public UDP, public SList<WiFiUDP> {

       ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In constructor 'WiFiUDP::WiFiUDP()':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:35:22: error: class 'WiFiUDP' does not have any field named '_sock'

 WiFiUDP::WiFiUDP() : _sock(NO_SOCKET_AVAIL) {}

                      ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual uint8_t WiFiUDP::begin(uint16_t)':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:45:9: error: '_sock' was not declared in this scope

         _sock = sock;

         ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:46:9: error: '_port' was not declared in this scope

         _port = port;

         ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual int WiFiUDP::available()':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:56:7: error: '_sock' was not declared in this scope

   if (_sock != NO_SOCKET_AVAIL)

       ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual void WiFiUDP::stop()':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:66:8: error: '_sock' was not declared in this scope

    if (_sock == NO_SOCKET_AVAIL)

        ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:69:26: error: '_sock' was not declared in this scope

    ServerDrv::stopClient(_sock);

                          ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual int WiFiUDP::beginPacket(IPAddress, uint16_t)':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:88:7: error: '_sock' was not declared in this scope

   if (_sock == NO_SOCKET_AVAIL)

       ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:90:7: error: '_sock' was not declared in this scope

   if (_sock != NO_SOCKET_AVAIL)

       ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual int WiFiUDP::endPacket()':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:101:32: error: '_sock' was not declared in this scope

  return ServerDrv::sendUdpData(_sock);

                                ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual size_t WiFiUDP::write(const uint8_t*, size_t)':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:111:27: error: '_sock' was not declared in this scope

  ServerDrv::insertDataBuf(_sock, buffer, size);

                           ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual int WiFiUDP::read()':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:125:23: error: '_sock' was not declared in this scope

    ServerDrv::getData(_sock, &b);

                       ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual int WiFiUDP::read(unsigned char*, size_t)':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:137:31: error: '_sock' was not declared in this scope

    if (!ServerDrv::getDataBuf(_sock, buffer, &size))

                               ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual int WiFiUDP::peek()':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:152:22: error: '_sock' was not declared in this scope

   ServerDrv::getData(_sock, &b, 1);

                      ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual IPAddress WiFiUDP::remoteIP()':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:166:25: error: '_sock' was not declared in this scope

  WiFiDrv::getRemoteData(_sock, _remoteIp, _remotePort);

                         ^

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp: In member function 'virtual uint16_t WiFiUDP::remotePort()':

C:\Program Files\Arduino\libraries\WiFi\src\WiFiUdp.cpp:176:25: error: '_sock' was not declared in this scope

  WiFiDrv::getRemoteData(_sock, _remoteIp, _remotePort);

                         ^

exit status 1
Error compiling for board NodeMCU 1.0 (ESP-12E Module).

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

And here is my code:

Code: Select all

/*
  Web client
 
 This sketch connects to a website (http://www.google.com)
 using a WiFi shield.
 
 This example is written for a network using WPA encryption. For 
 WEP or WPA, change the Wifi.begin() call accordingly.
 
 This example is written for a network using WPA encryption. For 
 WEP or WPA, change the Wifi.begin() call accordingly.
 
 Circuit:
 * WiFi shield attached
 
 created 13 July 2010
 by dlf (Metodo2 srl)
 modified 31 May 2012
 by Tom Igoe
 */

#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
#include <SPI.h>
#include <WiFi.h>
#include <ArduinoJson.h>

char ssid[] = "donowifi"; //  your network SSID (name) 
char pass[] = "wifipassword";    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;            // your network key Index number (needed only for WEP)

int status = WL_IDLE_STATUS;
// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
//IPAddress server(74,125,232,128);  // numeric IP for Google (no DNS)
char server[] = "www.google.com";    // name address for Google (using DNS)

// Initialize the Ethernet client library
// with the IP address and port of the server 
// that you want to connect to (port 80 is default for HTTP):
WiFiClient client;

void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(9600); 
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  
  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present"); 
    // don't continue:
    while(true);
  } 
  
  // attempt to connect to Wifi network:
  while (status != WL_CONNECTED) { 
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:    
    status = WiFi.begin(ssid, pass);
  
    // wait 10 seconds for connection:
    delay(10000);
  } 
  Serial.println("Connected to wifi");
  
  
  Serial.println("\nStarting connection to server...");
  // if you get a connection, report back via serial:
  if (client.connect(server, 80)) {
    Serial.println("connected to server");
    // Make a HTTP request:
    client.println("GET /json-api/getIbleStats?id=ECGWVGJIZ6E2YEQ HTTP/1.1");
    client.println("Host: www.instructables.com");
    client.println("Connection: close");
    client.println();
  }
}

void loop() {
  // if there are incoming bytes available 
  // from the server, read them and print them:
  while (client.available()) {
    char c = client.read();
    Serial.write(c);
    const size_t bufferSize = JSON_OBJECT_SIZE(3) + 40;
DynamicJsonBuffer jsonBuffer(bufferSize);

const char* json = "{\"views\":4429,\"favorites\":62,\"comments\":4}";

JsonObject& root = jsonBuffer.parseObject(json);

int views = root["views"]; // 4429
int favorites = root["favorites"]; // 62
//int comments = root["comments"]; // 4
Serial.print(views);
Serial.print(favorites);
  }

  // if the server's disconnected, stop the client:
  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting from server.");
    client.stop();

    // do nothing forevermore:
    while(true);
  }
}

Posted: **Fri Mar 03, 2017 4:06 am**

Remove "#include <WiFi.h>".

Posted: **Mon Mar 20, 2017 7:53 pm**

New error message after removing the

Code: Select all #include <wifi.h>

as suggested:

Code: Select all


(.text._ZN11ArduinoJson9JsonArray7invalidEv[_ZN11ArduinoJson9JsonArray7invalidEv]+0x8): undefined reference to `__cxa_guard_acquire'

sketch\sketch_mar20a.ino.cpp.o:(.text._ZN11ArduinoJson9JsonArray7invalidEv[_ZN11ArduinoJson9JsonArray7invalidEv]+0xc): undefined reference to `__cxa_guard_release'

sketch\sketch_mar20a.ino.cpp.o: In function `ArduinoJson::JsonArray::invalid()':

C:\Users\Donovan\Documents\Arduino\libraries\ArduinoJson/include/ArduinoJson/JsonArray.hpp:143: undefined reference to `__cxa_guard_acquire'

C:\Users\Donovan\Documents\Arduino\libraries\ArduinoJson/include/ArduinoJson/JsonArray.hpp:143: undefined reference to `__cxa_guard_release'

sketch\sketch_mar20a.ino.cpp.o: In function `ArduinoJson::JsonObject::invalid()':

C:\Users\Donovan\Documents\Arduino\libraries\ArduinoJson/include/ArduinoJson/JsonObject.hpp:282: undefined reference to `__cxa_guard_acquire'

C:\Users\Donovan\Documents\Arduino\libraries\ArduinoJson/include/ArduinoJson/JsonObject.hpp:282: undefined reference to `__cxa_guard_release'

collect2.exe: error: ld returned 1 exit status

exit status 1
Error compiling for board NodeMCU 1.0 (ESP-12E Module).

Posted: **Mon Mar 20, 2017 9:32 pm**

It compiled without errors for me after I removed

#include <WiFi.h>

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