---
title: "W5100s PHY not working"
url: "https://maker.wiznet.io/forum/14195"
markdown_url: "https://maker.wiznet.io/forum/14195/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "Prosenzor"
created: "2021-03-19T12:14:28+09:00"
last_activity: "2021-03-29T11:17:48+09:00"
language: "en"
views: 507
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# W5100s PHY not working

## Question

Asked by Prosenzor on 2021-03-19 in Ethernet Chips.

Hello,
I have no physical communication. The spi is working with no problem but when I connect with a router no led blinks in the router.
Here is my schematic
[Schematic_ControladorSonido_2021-03-19_09-13-04.pdf](https://maker.wiznet.io/forum/legacyFile.asp?path=5X25gCyZbUDyl9ROphZX7pDLU9q.pdf) (87,1 KB)
Thanks

## Replies

### Reply 1 by Prosenzor, 2021-03-22

Update, I fix a problem with the RJ45 conection but is not working yet.
Please help me!!!
Thanks

### Reply 2 by Prosenzor, 2021-03-29

New Update.
Sometimes work and others not, I really need help.
Thanks.

---

Source: https://maker.wiznet.io/forum/14195