arhi / ethernetspi2 Goto Github PK

Compilation error: cannot declare variable ´server´ to be of abstract type´EthernetServer´

What could be the reason?

problem is solved here: adafruit/Ethernet2#32

nnn112358 commented adafruit/Ethernet2#32 (comment)
There is no problem with this.

If new arduino esp32 or make error, need go to c:\Program Files (x86)\Arduino\hardware\espressif\arduino-esp32\cores\esp32\Server.h
Change virtual void begin(uint16_t port = 0) = 0; to virtual void begin() = 0;

https://github.com/m5stack/M5Stack/blob/master/examples/Modules/W5500/WebServer/WebServer.ino

For me the location of this file was in:
C:\Users{your_user}\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6\cores\esp32\Server.h

reopened arduino after opening the file and all was good, hope this helps mate :)

Hi,

I've got an error while compiling in Arduino IDE and / or Plattform.io.
Can you give me a hint how to use the code?

Is the SPI Version solved with new Arduino Ethernet approach?

BR

Since both W5500 and SD Card using the same SPI interface, would it work with the built in SD Card along with W5500?

While compiling ESP32EthCamera.ino I've got the following error:

ESP32EthCamera:79:16: error: cannot declare variable 'server' to be of abstract type 'EthernetServer'
 EthernetServer server(80);
                ^
In file included from D:\ESP32EthCamera\ESP32EthCamera.ino:37:0:
D:\ESP32EthCamera\EthernetSPI2.h:253:7: note:   because the following virtual functions are pure within 'EthernetServer':
 class EthernetServer : public Server {
       ^
In file included from C:\Users\uid\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6\cores\esp32/Arduino.h:152:0,
                 from C:\Users\uid\AppData\Local\Temp\arduino_build_661563\sketch\ESP32EthCamera.ino.cpp:1:
C:\Users\uid\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6\cores\esp32/Server.h:28:18: note: 	virtual void Server::begin(uint16_t)
     virtual void begin(uint16_t port=0) =0;
                  ^

cannot declare variable 'server' to be of abstract type 'EthernetServer'

Any idea what's wrong?

Errors:

c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o:(.literal._ZN13EthernetClass11socketBeginEht+0xc): undefined reference to W5500Class::execCmdSn(unsigned char, SockCMD)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function W5500Class::read(unsigned short)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:143: undefined reference to W5500Class::read(unsigned short, unsigned char*, unsigned short)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function W5500Class::write(unsigned short, unsigned char)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:138: undefined reference to W5500Class::write(unsigned short, unsigned char const*, unsigned short)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function W5500Class::writeSn(unsigned char, unsigned short, unsigned char*, unsigned short)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:224: undefined reference to W5500Class::write(unsigned short, unsigned char const*, unsigned short)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function write_data(unsigned char, unsigned short, unsigned char const*, unsigned short)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:410: undefined reference to W5500Class::write(unsigned short, unsigned char const*, unsigned short)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:413: undefined reference to W5500Class::write(unsigned short, unsigned char const*, unsigned short)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function EthernetClass::socketBegin(unsigned char, unsigned short)': C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:124: undefined reference to W5500Class::execCmdSn(unsigned char, SockCMD)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:113: undefined reference to W5500Class::execCmdSn(unsigned char, SockCMD)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function EthernetClass::socketBeginMulticast(unsigned char, IPAddress, unsigned short)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:196: undefined reference to W5500Class::execCmdSn(unsigned char, SockCMD)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:186: undefined reference to W5500Class::execCmdSn(unsigned char, SockCMD)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function EthernetClass::socketClose(unsigned char)': C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:213: undefined reference to W5500Class::execCmdSn(unsigned char, SockCMD)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o:C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:230: more undefined references to W5500Class::execCmdSn(unsigned char, SockCMD)' follow c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function EthernetClass::socketRecv(unsigned char, unsigned char*, short)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:292: undefined reference to W5500Class::read(unsigned short, unsigned char*, unsigned short)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function read_data':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:297: undefined reference to W5500Class::read(unsigned short, unsigned char*, unsigned short)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function W5500Class::writeSnRX_RD(unsigned char, unsigned short)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:273: undefined reference to W5500Class::execCmdSn(unsigned char, SockCMD)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function EthernetClass::socketPeek(unsigned char)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:371: undefined reference to W5500Class::read(unsigned short, unsigned char*, unsigned short)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function EthernetClass::socketSend(unsigned char, unsigned char const*, unsigned short)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:448: undefined reference to W5500Class::execCmdSn(unsigned char, SockCMD)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\socket.cpp.o: in function EthernetClass::socketSendUDP(unsigned char)':
C:\Users\Wawan\Documents\Arduino\sketch_dec1a/socket.cpp:515: undefined reference to W5500Class::execCmdSn(unsigned char, SockCMD)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\EthernetClient.cpp.o:(.literal._ZN10W5500Class6readSnEhtPht[_ZN10W5500Class6readSnEhtPht]+0x0): undefined reference to W5500Class::CH_BASE_MSB'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\EthernetClient.cpp.o: in function W5500Class::readSn(unsigned char, unsigned short, unsigned char*, unsigned short)': C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:221: undefined reference to W5500Class::read(unsigned short, unsigned char*, unsigned short)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o:(.literal._ZN10W5500Class8writeGAREPKh[_ZN10W5500Class8writeGAREPKh]+0x0): undefined reference to W5500Class::write(unsigned short, unsigned char const*, unsigned short)' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o:(.literal._ZN13EthernetClass5beginEPhmm+0x24): undefined reference to W5500Class::init()'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o:(.literal._ZN13EthernetClass4initEh+0x0): undefined reference to W5500Class::ss_pin' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o:(.literal._ZN13EthernetClass10linkStatusEv+0x0): undefined reference to W5500Class::getLinkStatus()'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o:(.literal._ZN13EthernetClass14hardwareStatusEv+0x0): undefined reference to W5500Class::chip' c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o:(.literal._ZN13EthernetClass7localIPEv+0x0): undefined reference to W5500Class::read(unsigned short, unsigned char*, unsigned short)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o: in function W5500Class::writeGAR(unsigned char const*)': C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:177: undefined reference to W5500Class::write(unsigned short, unsigned char const*, unsigned short)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o: in function W5500Class::writeSUBR(unsigned char const*)': C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:178: undefined reference to W5500Class::write(unsigned short, unsigned char const*, unsigned short)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o: in function W5500Class::writeSHAR(unsigned char const*)': C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:179: undefined reference to W5500Class::write(unsigned short, unsigned char const*, unsigned short)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o: in function W5500Class::writeSIPR(unsigned char const*)': C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:180: undefined reference to W5500Class::write(unsigned short, unsigned char const*, unsigned short)'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o: in function EthernetClass::begin(unsigned char*, unsigned long, unsigned long)': C:\Users\Wawan\Documents\Arduino\sketch_dec1a/Ethernet.cpp:35: undefined reference to W5500Class::init()'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o: in function EthernetClass::linkStatus()': C:\Users\Wawan\Documents\Arduino\sketch_dec1a/Ethernet.cpp:106: undefined reference to W5500Class::getLinkStatus()'
c:/users/wawan/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\Wawan\AppData\Local\Temp\arduino\sketches\F8CFC03ECD6ABAEDDC509508696C06F6\sketch\Ethernet.cpp.o: in function W5500Class::readSIPR(unsigned char*)': C:\Users\Wawan\Documents\Arduino\sketch_dec1a\utility/w5500.h:180: undefined reference to W5500Class::read(unsigned short, unsigned char*, unsigned short)'
collect2.exe: error: ld returned 1 exit status

exit status 1

D:\Project\Camera\ESP32EthCamera\ESP32EthCamera.ino:79:16: error: cannot declare variable 'server' to be of abstract type 'EthernetServer'
EthernetServer server(80);
^
In file included from D:\Project\Camera\ESP32EthCamera\ESP32EthCamera.ino:37:0:
c:\Users\kresi\OneDrive\Dokumenti\Arduino\libraries\EthernetSPI2\src/EthernetSPI2.h:253:7: note: because the following virtual functions are pure within 'EthernetServer':
class EthernetServer : public Server {
^
In file included from C:\Users\kresi\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6\cores\esp32/Arduino.h:152:0,
from C:\Users\kresi\AppData\Local\Temp\arduino\sketches\FE5914CB5C47106DDEA3D21F90EA3FDB\sketch\ESP32EthCamera.ino.cpp:1:
C:\Users\kresi\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.6\cores\esp32/Server.h:28:18: note: virtual void Server::begin(uint16_t)
virtual void begin(uint16_t port=0) =0;
^

exit status 1

Compilation error: cannot declare variable 'server' to be of abstract type 'EthernetServer'

Bonjour, j'aurais besoin d'aide concernant ce sketch notamment concernant cette partie :

// Enter a MAC address and IP address for your controller below. // The IP address will be dependent on your local network: byte mac[] = { 0x02, 0xAB, 0xCD, 0xEF, 0x00, 0x01 }; //IPAddress ip(192, 168, 89, 11); IPAddress ip(192, 168, 89, 11);

je ne sais quoi mettre dans ces lignes, le MAC adress correspond il à l'adresse mac du module W5500 ou bien celle de ma sortie ethernet du pc ? s'il s'agit du module W5500 comment la trouver ?
pour ip adress peut on mettre une adresse quelconque non déjà utilisée ?

merci pour votre aide et réponses, bien cordialement Philippe

Im use all original manual from you. And DONT WORKING.
What is wrong dont communicate with W550 ???