snap7 ☆

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Description:
Ethernet communication suite that works natively with Siemens S7 PLCs

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Networking

Tags: plc siemens s7 industrial-automation scada iot

Install: brew install snap7

About:
Snap7 is a lightweight, open-source library designed for seamless Ethernet communication with Siemens S7 family PLCs. It provides a native, cross-platform solution for industrial automation tasks, eliminating the need for proprietary Windows-only drivers. Its key value is enabling robust and efficient PLC connectivity for custom applications and SCADA systems.

Key Features:

Cross-platform (Windows, Linux, macOS, BSD)
Native C++ core with bindings for Python, Java, .NET, and more
Small footprint with no external dependencies
Supports all S7 protocol services (Read/Write, Routing, Block Management)

Use Cases:

Building custom SCADA and HMI applications
Integrating PLC data into MES/ERP systems
Automated testing and diagnostics of Siemens PLCs

Alternatives:

libnodave – An older, widely used library, but Snap7 is generally considered more modern and performant.
Python-snap7 – A Python wrapper for Snap7; the Homebrew formula provides the core C++ library needed by such wrappers.

Version History

Detected	Version	Rev	Change	Commit
Sep 13, 2024 10:53pm		1	VERSION_BUMP	500fe20c
Sep 24, 2023 8:24pm		1	VERSION_BUMP	4ff31e28