Save weather station history to file
usage: python -m pywws.logdata [options] data_dir options are: -h | --help display this help -c | --clear clear weather station's memory full indicator -s n | --sync n set quality of synchronisation to weather station (0 or 1) -v | --verbose increase number of informative messages data_dir is the root directory of the weather data
This module gets data from the weather station’s memory and stores it
to file. Each time it is run it fetches all data that is newer than
the last stored data, so it only needs to be run every hour or so. As
the weather station typically stores two weeks’ readings (depending on
the logging interval),
pywws.logdata could be run quite
infrequently if you don’t need up-to-date data.
There is no date or time information in the raw weather station data,
pywws.logdata creates a time stamp for each reading. It
uses the computer’s clock, rather than the weather station clock which
can not be read accurately by the computer. A networked computer
should have its clock set accurately by ntp.
Synchronisation with the weather station is achieved by waiting for a change in the current data. There are two levels of synchronisation, set by the config file or a command line option. Level 0 is quicker, but is only accurate to around twelve seconds. Level 1 waits until the weather station stores a new logged record, and gets time stamps accurate to a couple of seconds. Note that this could take a long time, if the logging interval is greater than the recommended five minutes.
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