---
title: "ModbusSlave devices running at hand"
url: "https://maker.wiznet.io/WIZnet/projects/modbusslave-devices-running-at-hand/"
markdown_url: "https://maker.wiznet.io/WIZnet/projects/modbusslave-devices-running-at-hand/md"
type: "UCC: User Created Content"
author: "www.toolsbox.biz"
author_url: "https://www.toolsbox.biz/nonsense/STM32MiniModbusTCPSlave/index.html"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "www.toolsbox.biz"
original_url: "https://www.toolsbox.biz/nonsense/STM32MiniModbusTCPSlave/index.html"
published: "2023-02-14"
language: "en"
hardware: ["WIZnet WIZ850io"]
likes: 3
views: 237
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# ModbusSlave devices running at hand

> I will introduce the ModbusSlave device running at hand. It is based on STM32miniShield.

Original author: www.toolsbox.biz (source: https://www.toolsbox.biz/nonsense/STM32MiniModbusTCPSlave/index.html)

## Components

- **WIZnet WIZ850io** x 1 ([docs](https://docs.wiznet.io/Product/ioModule/WIZ850io))

## Article

Original : <https://www.toolsbox.biz/nonsense/STM32MiniModbusTCPSlave/index.html>

> *I will introduce the ModbusSlave device running at hand. It is based on STM32miniShield.*
>
> *Ensure that your ModbusSlave device works stably and operates at hand to verify/verify it.*
> *I am trying to fix the source code and resume operation immediately when I come up with a new feature, of course, if I have a problem.*
> *Here you will find the latest sources.*
>
> *I access it from an off-the-shelf ModbusTCP tool from an iPhone or Windows PC over the network to identify the problem.*
> *There is little problem with accessing from LVModbusMaster.*
> *However, when accessing from a commercially available tool, access with the unknown functionCtion code occurs, and it stops without error handling, and various problems become apparent, so I am working on trying out as soon as I get a new tool.*
>
> *First, let’s take a presentation of the current ModbusSlave device specifications.*

**DOCUMENTS**

Code

Ethernet3[![](https://oldmaker.wiznet.io/wp-content/themes/onepress/assets/images/icon-link.png)](https://github.com/sstaub/Ethernet3)

TextFinder[![](https://oldmaker.wiznet.io/wp-content/themes/onepress/assets/images/icon-link.png)](https://github.com/tardate/TextFinder)

Arduino[![](https://oldmaker.wiznet.io/wp-content/themes/onepress/assets/images/icon-link.png)](https://github.com/RobTillaart/Arduino)

tm1638-library[![](https://oldmaker.wiznet.io/wp-content/themes/onepress/assets/images/icon-link.png)](https://github.com/rjbatista/tm1638-library)

MCP4725[![](https://oldmaker.wiznet.io/wp-content/themes/onepress/assets/images/icon-link.png)](https://github.com/enjoyneering/MCP4725)

BME280[![](https://oldmaker.wiznet.io/wp-content/themes/onepress/assets/images/icon-link.png)](https://github.com/finitespace/BME280)

---

Source: https://maker.wiznet.io/WIZnet/projects/modbusslave-devices-running-at-hand/