# rossmann-engineering/EasyModbusTCP.NET

Modbus TCP, Modbus UDP and Modbus RTU client/server library for .NET implementations

Repository: https://github.com/rossmann-engineering/EasyModbusTCP.NET
Canonical: https://ross.abutalabs.com/products/easymodbustcpnet
Language: C#
License Family: other
Topics: easymodbus, easymodbustcp, modbus, modbus-tcp, modbus-rtu, modbus-udp, plc, mqtt-client, mqtt-bridge
Last push: 2024-07-16T10:12:52+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3519, "days_push": 778, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1122, forks 453 (observed 2026-08-28T04:03:40.088140+00:00)

## What it is
A .NET library implementing Modbus TCP, UDP, and RTU client and server communication. It enables fast access to PLCs and other industrial automation components with only a few lines of code.

## Use cases
- read and write data from a PLC in C#
- implement a Modbus TCP server in .NET
- communicate with industrial devices over Modbus RTU serial
- poll holding registers and coils from a Modbus slave
- bridge Modbus data to MQTT
- connect embedded systems to factory automation equipment

## When to choose
- you need a simple, industry-proven Modbus client/server library for .NET
- you want support for TCP, UDP, and RTU in one package
- you need quick integration with PLCs using standard function codes FC1-FC23

## When to avoid
- you need a license other than MIT (the repo lacks a formal license file)
- you need active development or frequent updates
- you are not on a .NET platform

## Facets
- artifact type: library
- maturity: maintenance
- function: sdk, networking, developer-tools
- domain: iot, embedded-systems, cross-platform
- platform: dotnet, cross-platform, windows, embedded
- tags: modbus, modbus-tcp, modbus-rtu, modbus-udp, plc, industrial-automation, mqtt-bridge, csharp, nuget, automation, industrial-protocols, linux

## Member repositories
- rossmann-engineering/EasyModbusTCP.NET (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:40.088140+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:40:57.773997+00:00, confidence not recorded.
  - readme: https://github.com/rossmann-engineering/EasyModbusTCP.NET (fetched 2026-08-28T04:03:40.088140+00:00, sha 80f064fb5a88)
- Data as of 2026-08-30T08:39:29.467469+00:00.