Guralp Systems CMG-DCM build <10,000 User Manual
Page 238
Acquisition Modules and Platinum Firmware
Monitoring Operations
Clicking on 'Get data' performs out the selected query. If the selected format is
PNG, extra configurations options are available by clicking 'Configure graph
setup'.
14.4.3.1 Build CURL query
It is possible to schedule environmental data extraction using cron, the system
job-scheduler. When the job is scheduled, the data are extracted from the
server using a set of cURL instructions.
cURL is an open source project for transferring data from a server using a
command line. At a very basic level, all you need to do is type curl at the
command line followed by the output to retrieve. For example:
curl -output test.html www.example.com
would take the contents of the URL www.example.com and output it to the
filename test.html. There are a whole range of arguments you can insert
between the command and the URL. These are all explained in the cURL
manual, available at:
When you click on 'Build CURL query', Platinum generates a cURL query
based on the options you have selected on the environmental log page. For
example:
curl --output eam3057-2011-03-13T12:40:30Z.txt \
--form-string output=txt \
--form-string start=2011-03-13T12:40:30Z \
--form-string end=2011-03-14T12:40:30Z \
--form-string value='Data Out power/power' \
--form-string value='Data Out power/voltage' \
--form-string action='Get data' \
--digest --user root:rootme \
http://eam3057/cgi-bin/envirolog.cgi
In this example, the device serial number is eam3057. The data are output as
text. The start and end times are 24 hours apart. There are two
environmental values selected. The username and password are set to the
system defaults.
Copying the generated code into ta erminal emulator connected to the EAM
will output the file in the same way that the 'Get data' button does on the
environmental log page.
If the cURL command is to be used for automated scheduled data extraction,
some editing is required. Contact Güralp Systems for assistance on how to
tailor the command for your specific requirements.
14.4.4 Extract MiniSEED records
The MiniSEED compressor, gdi2miniseed, uses a ring buffer to store
miniSEED records after conversion from GDI. The default size of the buffer is
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Issue E - February 2014