PyPCC
Python OPC-UA server to control the I2C devices in the LTS.
- opcuserv.py: OPC-UA server that expose (visible) variables and methods.
Prerequisites
Requirements
This Python3 code uses other Python3 modules:
- opcua
- recordclass
- 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# Update the already installed modules in the virtual environment since they are usually outdated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 opcuaserv.py
Optional parameters are explained when the -h or --help parameter is supplied:
python3 pypcc2.py --help
cryptography is not installed, use of crypto disabled
cryptography is not installed, use of crypto disabled
usage: pypcc2.py [-h] [-s] [--no-lib-hack] [-p PORT]
optional arguments:
-h, --help show this help message and exit
-s, --simulator Do not connect to I2c, but simulate behaviour.
--no-lib-hack Do not require a hacked opcua library. Breaks behaviour.
-p PORT, --port PORT Port number to listen on [4842].