ESP32 Forum

Hey everyone,

I'm working on a project where I'm integrating the W5500-io Ethernet module with an ESP32 and an RJ45 connector that supports optional PoE module. The SPI communication between the W5500-io and ESP32 is working fine, but I'm having trouble getting an Ethernet link when using the 214A-R131 RJ45 connector (https://cdn.soselectronic.com/productda ... a-r131.pdf).

When I switch to a different RJ45 connector - 08B0-1X1T-06-F (https://www.belfuse.com/media/drawings/ ... t-06-f.pdf) - everything works perfectly, and I get a stable link. Unfortunately, this alternative connector doesn’t support PoE, so it's not suitable for my final design.

Does anyone know why the 214A-R131 might not work in this setup? I noticed the transformer and coil arrangement is different compared to the other connector, but I’m not sure if that could be the issue.

I am using the following connection between W5500-io and 214A-R131:

• W5500-io Ethernet module --> 214A-R131 RJ45 connector
• TX_N --> PIN 9
• TX_P --> PIN 8
• TCT --> PIN 7
• RCT --> PIN 1
• RX_N --> PIN 2
• RX_P --> PIN 3

Any insights or suggestions on what else to check would be greatly appreciated!

Thanks in advance!