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#Every 5 minutes (but not on the hour!!) check if the python script has crashed, if it has then restart
5,10,15,20,25,30,35,40,45,50,55 * * * * pgrep python3 || (python3 /home/atlasmon/mon/readTemp.py)
#Every 12 hours, 2 minutes before the scripts get killed, plot them
58 23,11 * * * python3 /home/atlasmon/mon/quickPlot.py
#Every 12 hours, on the hour, run teh script to push file to google drive and email
0 0,12 * * * source /home/atlasmon/mon/uploadToDrive.sh
0 0,12 * * * python3 /home/atlasmon/mon/sendEmail.py
#Every 12 hours, 2 min the hour, kill any mon script still running
2 0,12 * * * pgrep python3 && ( kill $(pgrep python3) ) 
#Every 12 hours, 3 minute after the hour, restart the python script
3 0,12 * * * python3 /home/atlasmon/mon/readTemp.py

 

 

The output log created by the script has the following format:

unixTime	RoomTempThermOut	 ColdTherm1	ColdTherm2	ColdTher3	Avg(ColdTherm1,ColdTherm3)

• The first column is simply unix time. This is parsed into a readable format in plots and adjusted for the pst timezone.
• The second column is the measured temperature of the thermistor outside the freezer, next to the labjack (see picture).
• The third and fifth columns are tmperature readings from thermistors at the bottom of the freezer (the coldest part). Their readings are averaged in the sixth column.
• The fourth column is the temperature reading from the thermistor near the top of the freezer volume. This is typically a few degrees warmer than the other 2. Only the sixth column temperature reding is used to trigger the alarm sequence. For example:

This script sets up an smtp client with gmail and sends an email to a specific user list (line 25), telling them both the time/date of the email according to the monitoring computer, and attaching the logfile and most recent temperature plot. The subject field also has the word urgent. For example: SendEmail.py is largely the same but with a different send list, no urgent in the subject line, and a different text body.

This script takes the latest entry in the logs folder and plots the three columns with the cold thermocouple readings against the parsed unix time. For example:

The two thermocouples at the bottom of the freezer have their temperature readings plotted with a dashed line, whilst their average is a solid line. The temperature reading of the thermocouple near the top of the freezer is plotted with a dot-dash line. The temperature of the thermocouple outside of the freezer is not plotted.

The plot is saved to the img/ dir with a filename that corresponds to the unixtime of the log script: #unixTime_plot.pdf.

The next scripts are concerned with monitoring and backup.

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