@teastain2 ... OMG ... I got it running ... and I am almost to embarrsed to tell the reason ... obviously the breadboard I was using for the T-Display was broken and did not have contact for pin 13 Changing the breadboard solved the problem, Ethernet is now working correctly!

@teastain2 ... OMG ... I got it running ... and I am almost to embarrsed to tell the reason ... obviously the breadboard I was using for the T-Display was broken and did not have contact for pin 13 Changing the breadboard solved the problem, Ethernet is now working correctly!

@teastain2 Hi, unfortunately I still do not get it working.
I made a minimal test-script as follows:

#include <Arduino.h>
#include <SPI.h>
#include <Ethernet.h>
#include <Wire.h>

#define PIN_ETH_SS 10
#define PIN_ETH_MOSI 11
#define PIN_ETH_SCK 12
#define PIN_ETH_MISO 13 


byte ip[4]={ 0xc0, 0xa8, 0x7a, 0x7b };
byte mac[]={ 0x1E, 0xE8, 0x09, 0xE7, 0x56, 0xD8 };


void setup() {
  Serial.begin(9600);
  Serial.println("Starting ...");
  SPI.begin(PIN_ETH_SCK,PIN_ETH_MISO,PIN_ETH_MOSI,PIN_ETH_SS);
  Ethernet.init(PIN_ETH_SS);
  Serial.println("Initializing NIC");
  Ethernet.begin(mac,ip);
  if(Ethernet.hardwareStatus()==EthernetNoHardware) {
    Serial.println("Ethernet-Interface not found!");
  } else if (Ethernet.linkStatus() == LinkOFF) {
    Serial.println("Ethernet cable not connected");
  } 
  Serial.println(Ethernet.localIP());
}

void loop() {
  delay(100);
}

Unfortunately it only outputs:

Ethernet-Interface not found!
0.0.0.0

On my ESP32-DEVKIT (with the correct ports ( SS = 5, MOSI = 23, SCK=18 and MISO =19) this code is working as expected.

@teastain2 Sorry, as I struggled with the PIN-Selection I missed giving the details.

• I am using VisualStudioCode with PIO.
• The Board is a HW-243 (https://www.sunsky-online.com/de/p/TBD05722754/HW-243-W5500-Ethernet-Network-Module-Hardware-TCP-IP-51-STM32-Single-Chip-Program.htm)
  W5500-Library: Default Arduino-Ethernet-Library 2.0.2.
• Yes it's a LilyGo T-Display-S3 Touch

I am trying to port a Code which works fine on my ESP32-Devkit-V4 board, but the GPIOs I used there are not available on the T-Display.

I try to connect an ethernet W5500 port to my T-Display-S3 but I don't get it seen. Has anyone a suggestion which pins to use to get it running?