ESP32-POE-WROVER

[cbrake]

We are using the ESP32-POE-WROVER with Zephyr and trying to get the clock coming out GPIO0. Do you have and code you can point me to that shows how to do this?

Here is the Zephyr board support we are working on for the ESP32-POE-*

https://github.com/simpleiot/zephyr-siot/tree/main/boards

[LubOlimex]

I see you've added GPIO0 but did you account for the PHY power pin? There is PHY power enable pin GPIO12. Check component "T1" in the schematic.

A lot of other ESP32 boards use GPIO0 for Ethernet clock, maybe if there is already config for another ESP32 board with Ethernet, use that as base just edit the definitions.

[cbrake]

Just getting back to this -- thanks, I'll double check power, but I think it is probably OK as I'm using the same code that already works fine on ESP32-POE (non wrover).

Can you point me to the code in your Arduino or other environments that has this working?

[LubOlimex]

Well, this confirms it then. It is exactly what I wrote in my first response. ESP32-POE and ESP32-POE-WROVER require different code for the Ethernet since the Ethernet clock is different pin. Download and refer to the schematic:

https://github.com/OLIMEX/ESP32-POE/blob/master/HARDWARE/ESP32-PoE-hardware-revision-L1/ESP32-PoE_Rev_L1.pdf

Above the Ethernet chip U4 there is small box that shows how the pinout changes when WROVER is used. Ethernet clock when WROVER is used is GPIO0 (instead of GPIO17 that is used in ESP32-POE).

In Arduino IDE it is sufficient to enable PSRAM. Like this:


I use the ETH8720_LAN example.



If setting it manually in the code config for WROVER should be:

#ifndef ETH_PHY_TYPE
#define ETH_PHY_TYPE  ETH_PHY_LAN8720
#define ETH_PHY_ADDR  0
#define ETH_PHY_MDC  23
#define ETH_PHY_MDIO  18
#define ETH_PHY_POWER 12
#define ETH_CLK_MODE  ETH_CLOCK_GPIO0_OUT
#endif