ESP32-PoE2 Ethernet webserver not running

[Da_Stier]

Hello all,

this is my first post on this forum.
I recently bought two ESP32-PoE2 boards.
https://www.olimex.com/Products/IoT/ESP32/ESP32-POE2/open-source-hardware

My board uses the WROVER module (not sure if there are other ESP32-PoE boards out there)

I try to get the basic Ethertnet webserver example to run.
This is the code I try to use.
https://github.com/OLIMEX/ESP32-POE/blob/master/SOFTWARE/ARDUINO/ESP32_PoE_Ethernet_WebServer/ESP32_PoE_Ethernet_WebServer.ino

I run the Arduino IDE 2.3.4 with the esp32 board plugin from Espressif Systems.
Its version is currently 2.0.11 as recommended in the code I try to run.
I chose the "ESP32 Wrover module" board definition.



The board is recognized as a COM port, the upload works just fine.
After uploading I get the following output on the serial terminal.

Code Select Expand

Setup...Registering event handler for ETH events...Starting ETH interface...E (1076) lan87xx: lan87xx_pwrctl(409): power up timeout
E (1076) lan87xx: lan87xx_init(491): power control failed
E (1076) esp_eth: esp_eth_driver_install(215): init phy failed
MDNS responder started
HTTP server started

I made sure to check the PHY settings in the ETH.h file that gets included at the top.

Code Select Expand

#ifndef ETH_PHY_ADDR
#define ETH_PHY_ADDR 0
#endif

#ifndef ETH_PHY_TYPE
#define ETH_PHY_TYPE ETH_PHY_LAN8720
#endif

#ifndef ETH_PHY_POWER
#define ETH_PHY_POWER 12
#endif

#ifndef ETH_PHY_MDC
#define ETH_PHY_MDC 23
#endif

#ifndef ETH_PHY_MDIO
#define ETH_PHY_MDIO 18
#endif

#ifndef ETH_CLK_MODE
#define ETH_CLK_MODE ETH_CLOCK_GPIO17_OUT
#endif




Does anybody know what I'm doing wrong?
If anyone has a working version of a standard Webserver over PoE for the ESP32-PoE2 board that he/she is willing to share I would be very happy as well.



Thanks,
Michael

[LubOlimex]

You are using the wrong pin for the clock. It is GPIO0 (not GPIO17). It should be like this:

#define ETH_CLK_MODE ETH_CLOCK_GPIO0_OUT

Refer to this demo:

https://github.com/OLIMEX/ESP32-POE2/blob/main/SOFTWARE/ARDUINO/LAN8720-POE2/LAN8720-POE2.ino

[Da_Stier]

Hello,

thank you very much for the fast reply, now it works fine.
So the problem was indeed me defining the wrong clk mode.

I think I got confused by the netlabel in the schematic being "
GPIO17\EMAC_CLK_OUT_18" on pin 5 of U7.

But after looking at U4 in the schematics, it makes a lot more sense now.


Thanks and best regards,
Michael

[LubOlimex]

Thank you for the update, glad it is now working. It is explained on page 9 of the manual and I've also written at the bottom of the product page, in the FAQ section:

- Ethernet doesn't work. Is my board defective?

- Make sure you've selected board variant with PSRAM enabled (this board has WROVER module, not WROOM). Make sure your code defines GPIO0 as Ethernet clock source pin.