libABCD 2.2.1

the Autonomous Bariloche Central DAQ, a centralized DAQ system for scientific experiments

Avalos-Bertou Central DAQ (libABCD) v2.2.0

(Formerly: Autonomous Bariloche Central DAQ)

This library handles two crucial aspects of any experiment that consists of multiple clients taking data: the communication between clients and the log information.

The main concept for the DAQ is that it orbits around a central server. Control and information run through this server allowing a permanent follow-up of what is happening. The raw data is handled by the clients themselves and is not seen by the DAQ. The central server is a MQTT broker. We recommend using mosquitto.

Logs are handled by each client, but the ABCDHandler logging handler sends the relevant information through MQTT, allowing for a centralized monitoring.

Installation

Requirements:

Starting from libABCD v2.2.0: paho.mqtt>=2. v2.1 and less: paho.mqtt<2

The latest version can be installed from pip:

python3 -m pip install libabcd

Usage

libABCD is a singleton object (i.e. a single instance runs per python process). Start it by running:

import libABCD
libABCD.init('my_daq')  # see documentation in the docstring

You can then publish, subscribe, unsubscribe and add_callback using the same object. Documentation can be found in the docstrings.

Best practice for handling your application log:

import logging
logger = logging.getLogger('your_app_name')
logger.addHandler(logging.NullHandler()) # remove all other handlers
logger.info('I am an INFO message') # or warning, error, critical

Don't forget to close the connection at the end of the session

libABCD.disconnect()

A full documentation of the available features is under way.

Questions, requests, feedback

If you find a bug, want to know more about specific features or have feedback of any kind, do not hesitate to email me at nicolaseavalos AT gmail DOT com.

License

This project is licensed under the MIT license.