We have a sensor that is monitoring usage of oil from a tank. Once every 10 seconds, we are told by this sensor whether oil is being consumed, or not being consumed. This is binary, and is actually the current voltage on a particular wire. When field5 in the attached goes minus, oil is being consumed. When field5 is not negative; oil is not being consumed.
We want to be able to do this:
$ php ./[url removed, login to view] /* defaults to yesterday, and /var/log/httpd/access_log */
11/04/2017 usage 1.24 liters, 0.74 hours, 0.50 euro
$ php ./[url removed, login to view] -day yesterday -file /var/log/httpd/access_log /* same as example one but no defaults */
11/04/2017 usage 1.31 liters, 0.74 hours, 0.51 euro
$ php ./[url removed, login to view] -day today -file /var/log/httpd/access_log
12/04/2017 usage 1.31 liters, 0.74 hours, 0.00 euro
$ php ./[url removed, login to view] -from "11:04:2017" -to "13:04:2017" -file /var/log/httpd/access_log
11/04/2017 usage 1.31 liters, 0.73 hours, 1.53 euro
12/04/2017 usage 1.31 liters, 0.75 hours, 0.00 euro
13/04/2017 usage 1.31 liters, 0.71 hours, 0.52 euro
total: 1.31 liters, 1.71 hours, 2.52 euro
Eg in the access_log_example, oil burning started at 12/Mar/2017:15:37:17 and ended at 12/Mar/2017:15:50:27, so the usage would be 13 minutes and 10 seconds or 13.016 minutes or 0.2169 hours.
Settings in /etc/[url removed, login to view]:
- Oil consumed per hour: 2.2 liters /* when the usage is "on" this is the amount of oil consumed per hour
- Oil cost per liter: 69c /* this is the cost to purchase oil.
- Currency: euro /* this is the currency for display purposes */
Note that it must take count of the following:
- That the oil can be switched on and off many times on an individual day
- That for the day in question; oil is already "on" at midight on the start of that day.
- That for the day in question; oil remains "on" at midight at the end of that day.
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