I investigated and discussed internally and I have bad news... Hardware time-stamping cannot be used on ESP32 (neither PTPv1 nor PTPv2).

Hi @DSchmid, this is known issue, please see https://github.com/espressif/esp-idf/issues/10851. It already has been fixed at master branch. Now, it is waiting to be backported to v5.0.

Based on your description, it seems you configured the same IP address on your PC and in the ESP32 code. I set the IP to 192.168.0.112 and the gateway to 192.168.0.1 in the code in the code, then on my laptop(running windows 10) I set the ethernet ipv4 properties to match this: IP Address: 192.168.0...

There is no such a driver in the ESP-IDF. However, you could try to write your own. It should not be that hard since it seems the JL1101 has standard IEEE 802.3 RMII/MII interface. You can follow the guideline at https://blog.espressif.com/esp-idf-custom-ethernet-phy-driver-quick-guide-45f9d23de0ad ...

GPIO17 should not be that much affected. However, a PCB design may affect that and PHY chip's robustness is also another side. Different behavior might be observed with different PHY chips. There might be incorrect phase shift in CLK or other issues with signal integrity... You can try to use GPIO16...

Using APPL CLK directly on the GPIO0 as a source for RMII REF CLK is experimental feature. There was really an issue observed when used along with WiFi under high traffic. This is documented in the Ethernet Configuration menu, please see below: GPIO0 can be set to output a pre-divided PLL clock (tes...

ESP32 WROOM/WROVER support Ethernet. But ESP32-S and ESP32-C series does not support Ethernet. You can use Espressif Product Selector to help you to find appropriate product https://products.espressif.com/#/produc ... =en&names=

Hi taoglas,

ESP32-­S3 is different chip! Please see ESP32 modules datasheets at https://www.espressif.com/en/products/modules/esp32

Edit: Just note that the Ethernet is currently (Q1.2023) supported only by ESP32 SoC.

Regards
Ondrej

SPI and EMAC shares the DMA. Could you please try to decrease `dma_burst_len` in your EMAC config (`eth_esp32_emac_config_t esp32_emac_config`) to e.g. `ETH_DMA_BURST_LEN_2`?

Yes, you can use it. The ESP-IDF PHY driver "runs" the PHY chip only in the basic mode and this is the same for both chips.

Difference between the chips is described here:
https://microchipsupport.force.com/s/ar ... ernet-PHYs