Olimex ESP32-EVB and Olimex ESP32 POE Boards EMIs Ethernet issues

davidrs16
Posts: 3
Joined: Fri Nov 16, 2018 8:54 am

Olimex ESP32-EVB and Olimex ESP32 POE Boards EMIs Ethernet issues

Postby davidrs16 » Fri Nov 16, 2018 9:11 am

Hi all,

I have purchased an olimex ESP32EVB and an olimex ESP32POE and I´m getting issues with the ethernet link due to EMIs. I have started my project with the ESP32EVB that has two internal relays in the board and when I toggle the relays that manage a 220V circuit with a very low current randomly the Ethernet link fails until I reboot the whole board but the ESP32 still working.

I have tried with the ESP32POE with an external relay board with relays optoisolated, and I am getting the same result probably a little less interferences becouse the relays are separated from the main board, but at least with the ESP32POE board the link restart automatically, the board reboot is not needed.

Have you have same issues than me with Ethernet and ESP32?
Do you know any other ESP32 board with Ethernet and POE integrated?

I have contact boards manufacturer but I´m still waiting for a solution.

Thanks in advance!

ESP_Alvin
Posts: 17
Joined: Thu May 17, 2018 2:26 am

Re: Olimex ESP32-EVB and Olimex ESP32 POE Boards EMIs Ethernet issues

Postby ESP_Alvin » Mon Nov 19, 2018 3:41 am

Hi, davidrs16

Since the board is not designed by Espressif, and we never used, I have checked with our team and I am afraid we need to review the hardware design of your board first, would you please help share the schematics or design documentation?

Thanks.

Alvin
Best Regards

davidrs16
Posts: 3
Joined: Fri Nov 16, 2018 8:54 am

Re: Olimex ESP32-EVB and Olimex ESP32 POE Boards EMIs Ethernet issues

Postby davidrs16 » Mon Nov 19, 2018 9:30 am

Hi Alvin,

Yes sure, I upload the diagram of the two Boards, I hope it can help.

Thanks!!
Attachments
ESP32-PoE_Rev_B2_Color.pdf
(374.57 KiB) Downloaded 8 times
ESP32-EVB_Rev_D.pdf
(381.07 KiB) Downloaded 7 times

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