PyPCC
Python OPC-UA server to control the I2C devices in the LTS.
- pypcc2.py: OPC-UA server that expose (visible) variables and methods.
Prerequisites
Requirements
This Python3 code uses other Python3 modules:
- opcua
- recordclass
- yaml
- numpy
We recommend to install a virtual environment and then install the dependencies there. For convenience we have added the relevant modules to the file requirements.txt that can be used to install them with pip3: python3 -m pip install -r requirements.txt
Below are step-by-step instructions that show how to install the dependencies neatly in a Python3 virtual environment.
# Create a Python3 virtual environment with the name "env"
python3 -m venv env
# Activate the virtual environment
. env/bin/activate
# Update the already installed modules in the virtual environment since they are usually outdated
python3 -m pip install --upgrade pip wheel
# Deactivate the virtual environment and start it again
deactivate
. env/bin/activate
# And finally install the module dependencies
python3 -m pip install -r requirements.txtExecute it
The software can be simply executed with Python3: python3 pypcc2.py -c RCU,CLK,UNB2
Optional parameters are explained when the -h or --help parameter is supplied:
python3 pypcc2.py --help
usage: pypcc2.py [-h] [-s] [-t] [-p PORT] [-l {DEBUG,INFO,WARNING,ERROR}] [-c CONFIG]
optional arguments:
-h, --help show this help message and exit
-s, --simulator Do not connect to I2c, but simulate behaviour.
-t, --test Do not start OPC-UA server.
-p PORT, --port PORT Port number to listen on [4842].
-l {DEBUG,INFO,WARNING,ERROR}, --loglevel {DEBUG,INFO,WARNING,ERROR}
Log level [INFO].
-c CONFIG, --config CONFIG
YAML config files, comma seperated [RCU]