ESP32-POE

[mdburmeister]

We just received 20 of the ESP32-POE, and none will work.  Our code runs fine on the ESP32-DEV and ESP32-GATEWAY boards.

Even this recommended sample fails:

https://github.com/espressif/arduino-esp32/blob/master/libraries/WiFi/examples/ETH_LAN8720/ETH_LAN8720.ino

It hangs in ETH.begin(), but even if this is removed, it crashes at various points.

Are these boards working?

[LubOlimex]

The boards are working but this example will not work with the ESP32-POE boards.

ESP32-GATEWAY, ESP32-EVB have different clock source compared to ESP32-POE. The ESP32-POE requires slightly different software to get the Ethernet working. We will do our best to provide such an example as soon as possible (we have an ISP-IDF example that we use during the production tests and we are working on an Arduino test). ESP-IDF example for the Ethernet is now available here: https://www.olimex.com/Products/IoT/ESP32/ESP32-POE/resources/ESP32_PoE_Ethernet.zip

Furthermore, future hardware revisions of ESP32-GATEWAY and ESP32-EVB would also implement this clock change that is seen in the ESP32-POE.

[mdburmeister]

Thanks for the IDF example!

To get the Arduino library working, just add these #defines before your #include <eth.h>:

#define ETH_CLK_MODE ETH_CLOCK_GPIO17_OUT
#define ETH_PHY_POWER 12

This will make the ETH_LAN8720.ino sample work.

These boards are awesome.  Thanks Olimex!!

[LubOlimex]

Thank you too. I can confirm this fix works. Also published it here: https://www.olimex.com/Products/IoT/ESP32/ESP32-POE/resources/ESP32_PoE_Ethernet_Arduino.zip