Hi everyone!

I'm trying to make an ethernet to WiFi bridge, to connect at device that only supports ethernet via WiFi. I am vary new to networking and have not done a ton of programming. But some...

I think I want to accomplish this:

DEVICE ---eth--->ESP32 wifi station---WiFi--->Home network WiFi AP

I did eventually find this example, and i "added wifi station mode". So that i am able to connect to the home network via the ESP32 WiFi. But not via ethernet.
After some (a lot) of testing and fiddling about i think the problem is that ethernet is only an DHCP-client, and my device is therefore not getting an IPaddress.

I have been looking through the code and the library but haven't been able to figure out how to set DHCP-mode. I can't even figure out how it's set for the WiFi AP mode. The library seems to be nicely written, but it's way above my programming level.

Now, i know there are things to buy to accomplish this. But that just isn't an option in this case. The point of the test is the ESP32.
And, i know i should just learn to code and learn how networks work. But hey, who has time for that?

Board: ESP32-C6-DEVKIT
IDE: Arduino IDE
Library: arduino-esp32 Ethernet

So, the question is; Is it even possible?

Thank you in advance!

Below is my code with the addition to the library example.

#include <WiFi.h>
#include <ETH.h>
#include <SPI.h>

#define ETH_TYPE     ETH_PHY_W5500
#define ETH_ADDR     1 // defualt
#define ETH_CS       21
#define ETH_IRQ      4 // defualt not connected
#define ETH_RST      5 // defualt
#define ETH_SPI_SCK  19
#define ETH_SPI_MISO 20
#define ETH_SPI_MOSI 18

#define AP_SSID "ESP32-ETH-WIFI-BRIDGE"
#define AP_PASS "password"

#define STA_SSID "EricsonBenchWiFi"
#define STA_PASS  "123456789"

IPAddress ap_ip(192, 168, 4, 1);
IPAddress ap_mask(255, 255, 255, 0);
IPAddress ap_leaseStart(192, 168, 4, 2);
IPAddress ap_dns(8, 8, 4, 4);

void setup() {
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Network.onEvent(onEvent);

  WiFi.AP.begin();
  WiFi.AP.config(ap_ip, ap_ip, ap_mask, ap_leaseStart, ap_dns);
  WiFi.AP.create(AP_SSID, AP_PASS);
  if (!WiFi.AP.waitStatusBits(ESP_NETIF_STARTED_BIT, 1000)) {
    Serial.println("Failed to start AP!");
    return;
  }
  delay(100);

  SPI.begin(ETH_SPI_SCK, ETH_SPI_MISO, ETH_SPI_MOSI);
  ETH.begin(ETH_TYPE, ETH_ADDR, ETH_CS, ETH_IRQ, ETH_RST, SPI);
  WiFi.begin(STA_SSID, STA_PASS);
}

void loop() {
  delay(20000);
}

void onEvent(arduino_event_id_t event, arduino_event_info_t info) {
  switch (event) {
/*----------------Ethernet events-----------------------------------------*/
    case ARDUINO_EVENT_ETH_START:
      Serial.println("ETH Started");
      break;

    case ARDUINO_EVENT_ETH_CONNECTED:
      Serial.println("ETH Connected");
      break;

    case ARDUINO_EVENT_ETH_GOT_IP:
      Serial.println("ETH Got IP");
      Serial.println(ETH);
      WiFi.AP.enableNAPT(true);
      break;

    case ARDUINO_EVENT_ETH_LOST_IP:
      Serial.println("ETH Lost IP");
      WiFi.AP.enableNAPT(false);
      break;
    case ARDUINO_EVENT_ETH_DISCONNECTED:
      Serial.println("ETH Disconnected");
      WiFi.AP.enableNAPT(false);
      break;

    case ARDUINO_EVENT_ETH_STOP:
      Serial.println("ETH Stopped");
      break;

/*-------------------WiFi Access point events-----------------------------------------*/
    case ARDUINO_EVENT_WIFI_AP_START:
      Serial.println("AP Started");
      Serial.println(WiFi.AP);
      break;

    case ARDUINO_EVENT_WIFI_AP_STACONNECTED:   
      Serial.println("AP STA Connected");
      break;

    case ARDUINO_EVENT_WIFI_AP_STADISCONNECTED:
      Serial.println("AP STA Disconnected");
      break;

    case ARDUINO_EVENT_WIFI_AP_STAIPASSIGNED:
      Serial.print("AP STA IP Assigned: ");
      Serial.println(IPAddress(info.wifi_ap_staipassigned.ip.addr));
      break;

    case ARDUINO_EVENT_WIFI_AP_PROBEREQRECVED:
      Serial.println("AP Probe Request Received");
      break;

    case ARDUINO_EVENT_WIFI_AP_STOP:
      Serial.println("AP Stopped");
      break;

/*-------------------WiFi Station events-----------------------------------------*/
    case ARDUINO_EVENT_WIFI_STA_START:     
      Serial.println("STA Started");
      break;

    case ARDUINO_EVENT_WIFI_STA_CONNECTED:
      Serial.println("STA Connected");
      break;

    case ARDUINO_EVENT_WIFI_STA_GOT_IP:
      Serial.println("STA Got IP");
      Serial.println(WiFi.STA);
      WiFi.AP.enableNAPT(true);
      break;

    case ARDUINO_EVENT_WIFI_STA_LOST_IP:
      Serial.println("STA Lost IP");
      WiFi.AP.enableNAPT(false);
      break;

    case ARDUINO_EVENT_WIFI_STA_DISCONNECTED:
      Serial.println("STA Disconnected");
      WiFi.AP.enableNAPT(false);
      break;

    case ARDUINO_EVENT_WIFI_STA_STOP:
      Serial.println("STA Stopped");
      break;

    default: break;
  }
}

 

Oh!
I forgot to mention. I know that the W5500 works as expected, because i can plug it in to a router and it connects.