PyVISA-sim
Simulated backend for PyVISA implementing TCPIP, GPIB, RS232, and USB resources
Decision gist · record as of 2026-08-14
Yes. PyVISA-sim fills a genuine gap for developers working with VISA-based instrument control: it eliminates the friction of installing NI-VISA and acquiring hardware just to test code. The package is actively maintained, has no known vulnerabilities, carries a permissive MIT license, and installs with minimal friction. Install it if you work with PyVISA and need to test offline or in automated environments.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires PyVISA 1.11+ and Python 3.10+; simulated device behavior must be configured via a plain text configuration file.
- Low friction: pure Python wheel with four straightforward runtime dependencies (pyvisa, PyYAML, stringparser, typing-extensions).
- Actively maintained with recent commits and no known vulnerabilities.
License · maintenance · safety
permissive license (permissive) — MIT license permits free use, modification, and distribution with minimal restrictions—suitable for both open-source and commercial projects.
last release 2025-09-04 (344 days) · last repo commit 2026-08-10 · 88 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 188,131 downloads/mo, #9,952 on PyPI
Alternatives
Verify before relying
pip install pyvisa-sim
import pyvisa
rm = pyvisa.ResourceManager('@sim')
inst = rm.open_resource('GPIB0::1::INSTR')
response = inst.query('*IDN?')- Extent of VISA method coverage beyond 'most of the methods' for Message Based communication
- Whether simulated device behavior configuration supports all GPIB/USB/Serial/Ethernet protocol variants
What it is and what it does
PyVISA-sim is a backend plugin for PyVISA that replaces the need for the National Instruments VISA library and physical instruments with a software simulation. It implements most methods for Message Based communication over GPIB, USB, Serial, and Ethernet in a simulated environment, allowing you to develop and test instrument control code on any machine without hardware. The behavior of simulated devices is controlled by a plain text configuration file, making it easy to model different instrument responses.
The package has been actively maintained since 2015, supports Python 3.10 through 3.13, and integrates seamlessly with PyVISA's dynamic backend loading system. It's particularly useful for CI/CD pipelines, offline development, and testing measurement scripts before deploying them to real hardware.
Use it for
- Test PyVISA measurement scripts in CI/CD pipelines without physical instruments or NI-VISA installed
- Develop and debug GPIB/USB/Serial instrument control code offline on any machine
- Mock instrument responses for unit testing measurement acquisition routines
- Prototype new measurement workflows before deploying to real laboratory hardware
- Train or demonstrate instrument control without requiring expensive test equipment
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
PyVISA-sim fills a genuine gap for developers working with VISA-based instrument control: it eliminates the friction of installing NI-VISA and acquiring hardware just to test code. The package is actively maintained, has no known vulnerabilities, carries a permissive MIT license, and installs with minimal friction. Install it if you work with PyVISA and need to test offline or in automated environments.
Install
pyvisa-sim on PyPI
Before you install
Low friction: pure Python wheel with four straightforward runtime dependencies (pyvisa, PyYAML, stringparser, typing-extensions). Actively maintained with recent commits and no known vulnerabilities.
Requires PyVISA 1.11+ and Python 3.10+; simulated device behavior must be configured via a plain text configuration file.
License in practice
MIT license permits free use, modification, and distribution with minimal restrictions—suitable for both open-source and commercial projects.
Quickstart
pip install pyvisa-sim
import pyvisa
rm = pyvisa.ResourceManager('@sim')
inst = rm.open_resource('GPIB0::1::INSTR')
response = inst.query('*IDN?')Verify before relying
- Extent of VISA method coverage beyond 'most of the methods' for Message Based communication
- Whether simulated device behavior configuration supports all GPIB/USB/Serial/Ethernet protocol variants
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 4 packagespyvisaPyYAMLstringparsertyping-extensions |
| Maintenance | Actively maintained 344 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 188,131 / month, #9,952 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 4 - BetaIntended Audience :: DevelopersIntended Audience :: Science/ResearchLicense :: OSI Approved :: MIT LicenseOperating System :: MacOS :: MacOS XOperating System :: Microsoft :: WindowsOperating System :: POSIX :: LinuxProgramming Language :: PythonProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Topic :: Scientific/Engineering :: Interface Engine/Protocol TranslatorTopic :: Software Development :: Libraries :: Python Modules |
Evidence: pyvisa_sim-0.7.1-py3-none-any.whl
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See also PyVISA-py · RsInstrument · PyVISA · snmpsim · pyftdi · PySpice · pyusb · zhinst-toolkit · MultiPyVu · hid