tahutils 0.1.4

Python utilities for Tahu & Sparkplug B.

TahUtils

A small wrapper package for using Tahu for Sparkplug B in Python. Comes with an unmodified (barring import structure) Tahu included, hence the use of the Eclipse license.

Examples

See the examples directory in the project repository.

Current Support

• Generating Sparkplug B topics
• Generating birth, death, and data payloads for nodes (not tested for devices)
• Managing aliases
• Using enums for metric names

Goals

• Parse message handling

Updating Tahu Version

Assuming no major refactoring to the tahu library, updating the included tahu consists of the following steps:

1. Download the latest release from the repository: https://github.com/eclipse/tahu/tags

2. Extract the source code.

3. Regenerate the sparkplug_b_pb2.py file per the instructions in tahu-<version>/python/core/README.md. Use tahu-<version>/python/core as your working directory when executing the command, and you'll need the protobuf compiler.

4. Copy the contents of the tahu-<version>/python/core directory to the tahutils/tahu directory.

5. Overwrite the tahutils/tahu/__init__.py file with the appropriate imports, typically:

   from . import sparkplug_b_pb2
   from . import array_packer
   from . import sparkplug_b
   

6. Modify the imports in tahutils/tahu/sparkplug_b.py to include the tahu package name:

   import tahutils.tahu.sparkplug_b_pb2 as sparkplug_b_pb2
   import time
   from tahutils.tahu.sparkplug_b_pb2 import Payload
   from tahutils.tahu.array_packer import *