Thanks for your input Andrew
your additional comments have removed the indentation errors but for some
reason weewx.sbd has stopped being populated by pond.py and the modified
lines
but again thanks
On Saturday, April 7, 2018 at 9:51:39 PM UTC+1, vigilancewx wrote:
>
> Hello
>
>
> I have a current cost electricity meter connect to a linux computer via a
> usb cable
>
> On the linux computer is a script that every 20seconds loggs the watt and
> temp readings from the current cost meter to a txt file and RRD file
>
>
> I can generate the RRD graphs into the weewx public_html directory and
> display them accrodingly
>
>
> I know that weewx is predominatly for displaying weather data but I would
> like weewx to handle the watt data, so I have tried to save the readings
> into the weewx.sdb
>
>
> I found this version of pond.py from the weewx user groups and it works
> with no errors
>
>
>
> Following advice given in the weewx help files I can now display the data
> in the various html files display graphs etc
>
>
> I have one problem, pond.py takes the readings from the first line in the
> txt file (readings.txt)
>
>
> how do I modify pond.py to take its readings from the last line of the txt
> file, because file the last line of my txt file holds the latest data
>
>
> thank you for any help
>
>
> import syslog
>
> import weewx
>
> from weewx.wxengine import StdService
>
>
> class PondService(StdService):
>
> def __init__(self, engine, config_dict):
>
> super(PondService, self).__init__(engine, config_dict)
>
> d = config_dict.get('PondService', {})
>
> self.filename = d.get('filename', '/var/www/html/data/reading.txt')
>
> syslog.syslog(syslog.LOG_INFO, "pond: using %s" % self.filename)
>
> self.bind(weewx.NEW_ARCHIVE_RECORD, self.read_file)
>
>
> def read_file(self, event):
>
> try:
>
> with open(self.filename) as f:
>
> #value = f.read()
>
> line = f.readline()
>
> value = line.split(',')
>
> syslog.syslog(syslog.LOG_DEBUG, "pond: found value of %s" % value)
>
> event.record['ccwatt'] = float(value[0])
>
> event.record['cctemp'] = float(value[1])
>
> except Exception, e:
>
> syslog.syslog(syslog.LOG_ERR, "pond: cannot read value: %s" % e)
>
--
You received this message because you are subscribed to the Google Groups
"weewx-user" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to weewx-user+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
