---
title: "Custom Ethernet + POE with W5500, cable issues"
url: "https://maker.wiznet.io/bruno/projects/Custom-Ethernet-POE-with-W5500-cable-issues/"
markdown_url: "https://maker.wiznet.io/bruno/projects/Custom-Ethernet-POE-with-W5500-cable-issues/md"
type: "UCC: User Created Content"
author: "bruno"
author_url: "https://maker.wiznet.io/bruno/"
original_author: "bruno"
original_url: "https://forum.arduino.cc/t/custom-ethernet-poe-with-w5500-cable-issues/952667"
published: "2022-02-08"
language: "en"
likes: 0
views: 209
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Custom Ethernet + POE with W5500, cable issues

> Custom Ethernet + POE with W5500, cable issues

Original author: bruno (source: https://forum.arduino.cc/t/custom-ethernet-poe-with-w5500-cable-issues/952667)

## Article

Hello. I designed a board for ethernet daisy-chaining with a plug-in passive POE board, and would like some help on the next iteration before I order more parts. I know it is niche and RS485 + power would've been more straight forward, but I would like to learn why this works and doesn't work. The POE board converts the V+ and V- from the Magjack connectors to a clean 5V, and I can interact with the W5500 with a microcontroller, but I've never gotten it to connect to the network properly. Link status is OFF, but the router and cable are fairly new. I think I am not following the W5500 reference designs well, though it is hard to match their designs when I would like to daisy-chain these and need a Magjack connector that can handle POE, and their examples don't do that. My old design (top image) is assembled, and I have not ordered the parts for my new design (bottom image) yet. Any help on this would be greatly appreciated as I am starting to get burned out. Thank you. EDIT: The new design does work, but does not allow for daisy-chaining.

[![image](https://aws1.discourse-cdn.com/arduino/original/4X/d/0/c/d0c7394ee2d2242975e872a108e766bf3eb2da42.png)](https://aws1.discourse-cdn.com/arduino/original/4X/d/0/c/d0c7394ee2d2242975e872a108e766bf3eb2da42.png)

[![eth_new](https://aws1.discourse-cdn.com/arduino/original/4X/c/d/2/cd21b3f32ead03639f520e1fc736e315976abe03.png)](https://aws1.discourse-cdn.com/arduino/original/4X/c/d/2/cd21b3f32ead03639f520e1fc736e315976abe03.png)

---

Source: https://maker.wiznet.io/bruno/projects/Custom-Ethernet-POE-with-W5500-cable-issues/