---
title: "Not found by Configtool"
url: "https://maker.wiznet.io/forum/12898"
markdown_url: "https://maker.wiznet.io/forum/12898/md"
type: "Forum topic"
category: "MCU & Boards"
author: "kslam1980"
created: "2018-05-16T08:57:43+09:00"
last_activity: "2018-05-16T08:57:43+09:00"
language: "en"
views: 697
replies: 0
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Not found by Configtool

## Question

Asked by kslam1980 on 2018-05-16 in MCU & Boards.

I fabricated my own pcb board with W7100A, base on the reference design of WIZ107SR-TTL. When i power up the board, and connect it to the PC through the RJ-45 cable, the green LED on the connector is light up, and yellow LED is blinking when i try to search it through the Configtool. However, the Configtool is not able to detect the device. Please advise.

---

Source: https://maker.wiznet.io/forum/12898