[Nottingham] USB dongles/widgets for GNSS (GPS, GLONASS, others) and 3G/4G SMS & data?

[Martin]

Folks,

For the GNSS bit:

To answer myself for what I've seen thus far, looks like one of the USB
dongles utilising a ublox M8 series chipset is the way to go...

However, to get a "PPS" signal for accurate time, then it's looking like
one of the older discrete RasPi "HATs" are needed (at x4 the price and
more...) ...


Anyone got any experience with those things?

Cheers,
Martin



On 19/03/2019 18:15, Martin via Nottingham wrote:
> Oh noooo...
> 
> I've just stumbled across RTKLIB :-)
> 
> http://www.rtklib.com/
> 
> 
> (Mmmm... Need to get the first bits going first...!)
> 
> Any recent pointers?
> 
> Cheers,
> Martin
> 
> 
> On 19/03/2019 17:45, Martin via Nottingham wrote:
>> A quick internet surf suggests there are a gazillion more recent
>> USB-based devices at £10 - £20 as compared to some rather clunky
>> 'hat'-based devices at £40 and more that look to use multi-generations
>> old chipsets...
>>
>> Hence the question for what are the current devices and are there any
>> 'gotchas'...?
>>
>> My first impression is that such as u-blox-8 and SiRFstar(-n?) are the
>> main chipsets to go for... But what are they called once the Marketing
>> people have renamed them into branding obscurity?!
>>
>> And full featured rather than suffering a dongled dongle?...
>>
>>
>> Anyone out there already played with this?
>>
>> (Especially to use as an ntpd stratum 1 source :-) )
>>
>> Cheers,
>> Martin
>>
>>
>> On 19/03/2019 17:05, VM via Nottingham wrote:
>>> Why not a pi-specific hat then?
>>>
>>> On 19 March 2019 13:26:48 GMT, Martin via Nottingham
>>> <nottingham at mailman.lug.org.uk> wrote:
>>>
>>>     Folks,
>>>
>>>     Anyone any experience with the various £10/£20 USB dongles on linux for
>>>     GPS and internet?
>>>
>>>     I'm wanting to upgrade one of my RasPi boards to find out for itself
>>>     what time it is, where it is, and to be able to communicate to the world.
>>>
>>>     Are the USB gizmos any good? Anything to watch out for?
>>>
>>>     There looks to be LOTs of 'em! :-) All with Marketing details only :-(
>>>
>>>
>>>     Cheers,
>>>     Martin
>>>
>>>
>>> --
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>>>
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>