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Please also see that page for issues with the Jessie release of Linux, and with the newer Raspberry Pi model 3.I start by describing how to get the Raspberry Pi running with just a LAN connection - no display, keyboard or mouse - a so-called headless operation.My thanks to Folkert van Heusden and Anthony Stirk for these developments.Note that the Adafruit GPS Hat uses GPIO 4, physical pin 7, so you would need to change the commands given in this document.*/ body a a:hover a img h1,h2,h3,h4,h5,h6 h1 h2,h3 .button .button:hover .button:active .header .header Shadow .header Shadow a .header Foreground .header Foreground a Selected Unselected Contents Contents .button #sidebar #sidebar Options input #sidebar Options .slider Panel #sidebar Options .slider Panel a #sidebar Options .slider Panel a:hover #sidebar Options .slider Panel a:active .wizard .wizard h1 .wizard h2 .wizard Step .wizard Step.wizard Step Done .wizard Footer .wizard Footer .status .wizard .button .wizard .button:hover .wizard .button:active .wizard Changed .wizard .changed Locally .wizard .changed Server .wizard .changed Both .wizard Found .wizard To Server .wizard From Server #message Area #message Area .button .popup Tiddler .popup .popup hr .popup li.disabled .popup li a, .popup li a:visited .popup li a:hover .popup li a:active .popup Highlight Break div .tiddler .default Command .shadow .title .title .subtitle .toolbar .toolbar a .selected .toolbar a .selected .toolbar a:hover .tagging, .tagged .selected .tagging, .selected .tagged .tagging Title, .tagged Title .tagging .button, .tagged .button .As an experiment, I purchased one of the low-cost credit-card-size Raspberry Pi computers, and have configured it to run NTP (Network Time Protocol).If you have an "RF-proof" roof (lead-lined, perhaps?!
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Whilst weather will normally have only a small effect in the signal - e.g.
heavy rain - it's possible that a layer of snow could attenuate the signal enough to stop the GPS receiving enough signal.
Later additions have included remote monitoring of the NTP server performance, and more general monitoring of the Raspberry Pi using the standard SNMP functions, with an additional CPU temperature monitoring add-on. Note that good performance is dependant on the GPS unit having a clear view of the sky, particularly the southern part of the sky if you are in the northern hemisphere.
With older GPS receivers this required an outdoor antenna, but more modern units such as those mentioned here may well work indoors providing that some sky is visible, perhaps on the top floor of the building (as I am).
You can see the Ethernet lead on the left, and the 4 GB SD card with the operating system on the right, together with the micro-USB power lead.