pyhard2 is an object-oriented framework to help in the development of instrument drivers. pyhard2 is proposed as an alternative to LabVIEW. Emphasis is given on serial drivers but the framework can be used with any socket.

The source also contains the implementation of a PID controller and a setpoint ramp generator.

The instrument drivers may further be incorporated in a GUI, using, e.g. PyQt or PySide. Threading is automatically taken care of. Furthermore, generic GUI (called controllers) are provided and can be extended.


  • The python driver development kit (DDK).
  • SCPI drivers are supported.
  • Digital I/O hardware is supported.
  • Drivers easy to write (0.5 days, typically) and easy to read.
  • Loose coupling between drivers and GUI.
  • Threading is taken care of for free in the GUI.
  • Programming hardware (i.e., set point ramps with a PID) is available for free in the GUI.
  • Extend the GUI using Qt Designer—or with hand-written code.
  • Present an overview of various controllers in a dashboard.
  • Dashboard with a tabbed interface.

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Additional Project Details

Intended Audience

Science/Research, Advanced End Users, Engineering

User Interface

Console/Terminal, Qt

Programming Language