ESP32 Forum

Posted: **Thu Aug 12, 2021 7:57 am**

Hello,
I've designed custom board using ESP32 and W5500 ethernet controller. In the prototype using modules, everything worked as expected. When the custom board is manufactured, there is no communication between ESP32 and ethernet controller. The schematic is attached, could someone please take a look and help me out?

: ESP32 + W5500 sch.JPG (106.81 KiB) Viewed 6939 times

Posted: **Fri Aug 13, 2021 12:57 pm**

Hello @ErminP

I noticed there is no pull-up resistor on GPIO0 - are you sure ESP32 is running your code and doesn't start up into download mode?

Have you double-checked the W5500 crystal is oscillating properly?

I am by no means an expert in PCB layout so I am not sure how analog and digital GND should be handled / routed, but I noticed that you separated analog from digital GND except for W5500 pin 48 (AGND) which is connected to pin 29 (DGND).

Thanks
Felix

Posted: **Mon Aug 16, 2021 6:38 am**

Hello @ErminP

I noticed there is no pull-up resistor on GPIO0 - are you sure ESP32 is running your code and doesn't start up into download mode?

Have you double-checked the W5500 crystal is oscillating properly?

I am by no means an expert in PCB layout so I am not sure how analog and digital GND should be handled / routed, but I noticed that you separated analog from digital GND except for W5500 pin 48 (AGND) which is connected to pin 29 (DGND).

Thanks
Felix

Hi @Felix, the code is running as expected, I have RFID module that works using SPI communication as well and it is working.
I didn't check the crystal as I don't have function generator. Regarding the grounds, they are all the same GND.

Thanks for the response!
Ermin

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