Unable to Compile Any EthernetWebServer Examples on ESP32-Wrover-E about ethernetwebserver

[khoih-prog]

Hi @HWEDK

Thanks for your interest in the library. I used to be Controls Engineer at some time, and understand how you'd love the jobs for your whole life.

From your error message, it seems that you forgot to copy the Server.h to the correct location, in your case

C:\Users\admin\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\cores\esp32/Server.h

That'll fix the issue you mentioned

#ifndef server_h
#define server_h

#include "Print.h"

class Server: public Print
{
public:
    // KH, change to fix compiler error for EthernetWebServer
    // error: cannot declare field 'EthernetWebServer::_server' to be of abstract type 'EthernetServer'
    // virtual void begin(uint16_t port=0) =0;
    //virtual void begin() = 0;
    void begin() {};
};

#endif

[HWEDK]

Thanks a lot, very fast response too. At least I understand the code better after digging around so much...
If I may, another dumb item I must have overlooked, I get the following on serial terminal with 0.0.0.0 IP?
Is this something with my own local network. I set the defines.h IP to the range of my computer.
Something else in the config I'm missing?

Starting WebServer on ESP32 with W5x00 using Ethernet Library
EthernetWebServer v1.2.1
[ETHERNET_WEBSERVER] =========== USE_ETHERNET ===========
[ETHERNET_WEBSERVER] Default SPI pinout:
[ETHERNET_WEBSERVER] MOSI: 23
[ETHERNET_WEBSERVER] MISO: 19
[ETHERNET_WEBSERVER] SCK: 18
[ETHERNET_WEBSERVER] SS: 5
[ETHERNET_WEBSERVER] =========================
[ETHERNET_WEBSERVER] ESP32 setCsPin: 22
=========================
Currently Used SPI pinout:
MOSI:23
MISO:19
SCK:18
SS:5
=========================
Using mac index = 0
EthernetWebServer started @ IP address: 0.0.0.0

[khoih-prog]

It's possible that you connect the W5500 CS/SS pin to the wrong pin from what specified in the sketch..

According to your current (default) settings

[ETHERNET_WEBSERVER] ESP32 setCsPin: 22

the W5500 CS/SS pin must be connected to GPIO22 of ESP32.

It's possible that you're connect it to GPIO5 (many cases, such as in ESP32_W5500_NTP_CLIENT

If so, you can just modify WebServer.ino#L109-L111 to change the pin used for CS/SS

From pin GPIO22

#ifndef USE_THIS_SS_PIN
  #define USE_THIS_SS_PIN   22    // For ESP32
#endif

to pin GPIO5 (or whatever pin you're using)

#ifndef USE_THIS_SS_PIN
  #define USE_THIS_SS_PIN   5    // For ESP32, or whatever GPIO pin you're using
#endif

You can also try to use DHCP IP by keeping WebServer.ino#L185-L187 as is

// Use Static IP
//Ethernet.begin(mac[index], ip);
Ethernet.begin(mac[index]);

Good Luck,

[HWEDK]

YES! I got it...Your line about DHCP made me realize I crossed code that was trying to expect both DHCP and Static. Also, yes, needed the line with reset being 22, and ensuring CS are set to correct pin in code also needed doing. I have the HTML displaying now.

Now I just have to merge WiFi, Ethernet, Filesystem, and SPI handling

[khoih-prog]

Good to know you're making good progress by yourself. The acquired experience will definitely follow you forever.