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A Python driver for the Watlow EZ-Zone PM3 temperature controller standard bus protocol

Project description

A Python 3 driver for the Watlow EZ-Zone PM temperature controller standard bus protocol. This driver allows the user to access each of the parameters outlined in the Watlow user manual with just a few functions.

  • Free software: GNU Lesser General Public License v3 (LGPLv3)


pip install pywatlow

You can also install the in-development version with:

pip install



To run the all tests run:


Note, to combine the coverage data from all the tox environments run:


set PYTEST_ADDOPTS=--cov-append


PYTEST_ADDOPTS=--cov-append tox


0.1.4 (2022-04-15)

  • Fixed message generation/parsing for addresses 11 through 16

0.1.3 (2021-07-25)

  • Fixed support for multiple instances where the parameter data type is an integer

0.1.2 (2021-01-13)

  • added support for multiple instances, like in the RM series controllers with multiple channels

0.1.1 (2020-08-15)

  • Initial PyPI release

  • Various tox, badge, and metadata fixes

  • Removed unused temperature unit conversion functions

  • Updated Python version requirements

  • Minor documentation clean up

0.1.0 (2020-08-08)

  • Added basic functionality

    • Reading/writing of Watlow parameters

    • Request message generation

    • Calculation of check bytes

    • Response message parsing

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