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This is a ctypes based python wrapper for snap7. Snap7 is an open source, 32/64 bit, multi-platform Ethernet communication suite for interfacing natively with Siemens S7 PLCs.

python-snap7 support Python 2.7 and 3.4+, Windows Linux and OS X.

The full documentation is available on Read The Docs.

see python-snap7 in action.


Please read the online installation documentation.


  • Gijs Molenaar
  • Stephan Preeker. I'm available for consulting work to help you do integration with siemens PLC's. stephan at preeker dot net

Special thanks to

  • Davide Nardella for creating snap7
  • Thomas Hergenhahn for his libnodave.
  • Thomas W for his S7comm wireshark plugin