====== This page has been deprecated and is no longer accurate  ======

====== VATT Logging  ======


Important engineering data is now logged at VATT into a sqlite database. This is done using sqlaclchemy and several python modules to retrieve data from the relevant systems. That [[https://gitlab.com/srswinde/vatt-logging| source code]] can be found on gitlab. There is also a [[http://vatt.as.arizona.edu:42180/|web page]] that will display simple plots or tables of logged data.


==== Web API for advanced plotting ====

Through the previously mentioned web app there is a url API of sorts that can be used to access data programmatically. 

The program below will retrieve data from each currently available table for the last 1200 minutes. 

<code python>
#!/usr/bin/python


import pandas as pd

minsago = 1200

datafames = dict()

for table in ['temps', 'telem', 'ngtelem', 'ivps' ]:
    url = "http://vatt.as.arizona.edu:42180/recent/data/{}.csv?minsago={}".format( table, minsago )
    print("retreiving data from: \n\t\t{}".format(url))
    dataframe[table].plot(subplots=True)
    try:
        dataframe[table]=pd.read_csv(url)
        print(dataframe[table])
        #uncomment the below line if you have matplotlib or pylab. 
        #dataframe[table].plot(subplots=True)
    except Exception as err:
        print err

    print()
    print()

</code>