DTACQ

WAMP server

This provides a server that allows communication with DTACQ cards use WebSockets (e.g. through a web browser). The server itself is written in python and requires the following packages:

• twisted - event-driven networking engine
• autobahn - web-socket communication
• clint - for some nice command-line tools
• numpy - arrays/data handling
• pynedm - communication with database
• paramiko - SSH communication

Getting started

For running as a daemon (e.g. in production), please see here.

This is as simple as running the code (make sure PYTHONPATH is set correctly to be able to pull in dtacq):

from dtacq import ShipData

if __name__ == '__main__':
   from twisted.python import log
   from twisted.internet import reactor
   import sys

   log.startLogging(sys.stdout)

   from autobahn.twisted.websocket import WebSocketServerFactory
   factory = WebSocketServerFactory()
   factory.protocol = ShipData

   reactor.listenTCP(port=9000, factory=factory)
   reactor.run()

dtacq Modules

dtacq is broken into several modules:

• database - handles communications with the database (e.g. uploading of files and measurements)
• cards - supported cards. Here’s where one would put new cards.
• decorators - some decorators to ensure that cards are running/not running.
• digitizer_utils - utilities, including communication with the digitizer cards via SSH
• readout - objects performing actual readout of the system. These classes also communicate with the web interface.
• settings - module handling import of settings from the environment
• trigger - handles user-written triggers
• web_interface - class to handle interaction with the browser via web-sockets.

Please see the code for more details here.