General > General Technical Chat

Cheapest way to get date/time from GPS

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tom66:
Could also use Time from NPL;
https://en.wikipedia.org/wiki/Time_from_NPL_(MSF)

Usable in UK and most of France, Spain and a bit of Germany, from memory.

The OP hasn't specified whether the solution can be geographically locked or if it has to work anywhere.  If it has to work anywhere, then GPS (or internet) is really the only option, and an internet connection requires an access point to be set up or a 4G worldwide SIM.

nctnico:
Actually, using a mobile network as a time source is also an option. Unless a device is really installed in a remote location, you'll have some coverage. The pro is that a mobile network has a much better indoor coverage.

Someone:

--- Quote from: tom66 on February 27, 2024, 10:43:23 pm ---The OP hasn't specified whether the solution can be geographically locked or if it has to work anywhere.  If it has to work anywhere, then GPS (or internet) is really the only option, and an internet connection requires an access point to be set up or a 4G worldwide SIM.
--- End quote ---
No sim required:
https://wsts.atis.org/wp-content/uploads/2023/03/06-Andrea-Dalla-Torre.Accurate-Time-Distribution-Using-Cellular-Radio-Signal.pdf

OP is cost reducing their highly profitable commercial product on your time... ;)

SiliconWizard:

--- Quote from: Someone on February 27, 2024, 10:48:35 pm ---OP is cost reducing their highly profitable commercial product on your time... ;)

--- End quote ---

To be fair, a number of regular users of EEVBlog are doing just that, using the forum as free R&D for their company.

Someone:

--- Quote from: SiliconWizard on February 27, 2024, 10:55:22 pm ---
--- Quote from: Someone on February 27, 2024, 10:48:35 pm ---OP is cost reducing their highly profitable commercial product on your time... ;)

--- End quote ---

To be fair, a number of regular users of EEVBlog are doing just that, using the forum as free R&D for their company.

--- End quote ---
Its a feature of the forum and openly encouraged, but the posters tend to be coy about their details/motivations which is unfortunate.

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