ESP32 Forum

Posted: **Mon Sep 12, 2022 8:32 pm**

Hello,

I am trying run AT-commands firmware for my ESP32-WROOM-32U with eth LAN8710A chip.
In the attachment I am sending the connection diagram:

esp32_eth.pdf: (122.77 KiB) Downloaded 309 times

I reconfigured the UART for AT commands to pins compatible with the schematic. AT communication works. I configured the RMII interface with an external clock on pin 17. In the attachment (zip) I am sending the sdconfig and binaries. I am using newest version of idf.py.
This is segment of eth config:

Code: [Select all] [Expand/Collapse]

#
# Ethernet
#
CONFIG_ETH_ENABLED=y
CONFIG_ETH_USE_ESP32_EMAC=y
CONFIG_ETH_PHY_INTERFACE_RMII=y
# CONFIG_ETH_PHY_INTERFACE_MII is not set
# CONFIG_ETH_RMII_CLK_INPUT is not set
CONFIG_ETH_RMII_CLK_OUTPUT=y
# CONFIG_ETH_RMII_CLK_OUTPUT_GPIO0 is not set
CONFIG_ETH_RMII_CLK_OUT_GPIO=17
CONFIG_ETH_DMA_BUFFER_SIZE=512
CONFIG_ETH_DMA_RX_BUFFER_NUM=10
CONFIG_ETH_DMA_TX_BUFFER_NUM=10
# CONFIG_ETH_USE_SPI_ETHERNET is not set
# CONFIG_ETH_USE_OPENETH is not set
# end of Ethernet

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When i send command: AT+CIPETHMAC? i receive ERROR msg. Other commands: AT, AT+DRVPWMINIT etc works.
Please, tell me what i shoud change in sdkonfig file.

Posted: **Mon Sep 19, 2022 10:05 am**

Hi,
ESP32 AT supports to four Ethernet PHY: LAN8720, IP101, DP83848 and RTL8201.

: 企业微信截图_1663581834418.png (89.79 KiB) Viewed 3302 times

You can first test according to the IDF demo to see if PHY LAN8710 is supported. If it works, you can test AT again.
IDF ethernet dome: https://github.com/espressif/esp-idf/tr ... s/ethernet

Posted: **Tue Sep 20, 2022 8:32 am**

I would start with confirming that Ethernet works on your board. I would try to flash it with \ethernet\basic example and try to ping it. I briefly checked your schematics and the pull-ups on RXD0/1 look suspicious to me. Does this comes from some reference design?

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