Arduino for STM32

i'm probably quite a hard core ST GPS fanatic
i started with STA5620
https://www.st.com/resource/en/datasheet/cd00166508.pdf
i hit a head fake and and the order is blown on one of the aliexpress/ebay sites, the part number STA5620 is no longer available but a vendor list it for sale, it is not delivered and i end up disputing it

next i start searching for more legitimate sources
i found an interesting part number Teseo-LIV3F
https://www.st.com/content/st_com/en/pr ... liv3f.html
and it turns out this is literally a complete GPS module rather than a GPS RF frontend. i.e. i'd not need to work to de-scramble the GPS RF gold codes, no need to do complicated gold codes matching or FFT stuff. this little module does all that RF de-scramble all that output and simply gives NMEA sentences does GPS/Galileo/Glonass/BeiDou/QZSS wow quite a mouthful, quite a good gps module from ST, that module and chip itself is probably more complicated than just that plain STM32F103
this module is apparently available on digikey and element14, it made doing gps look all too simple, ST did the hard work
of course these days there are many competitors but i'd guess this is quite a fun module

ST literally made a shield out of it
https://www.st.com/en/ecosystems/x-nucl ... l#overview
it may be quite fun to integrate this with the official core etc, about 1 year old, quite 'new' ok so now we've a good GPS, what is a good project to do with this GPS
of course there are all that u-blox competitors some of the u-blox ones seemed to cost less, but i'd guess it is a competitive market after all

@ag123

well it is already done
https://github.com/stm32duino/X-NUCLEO-GNSS1A1

and also you can update it
https://github.com/stm32duino/Teseo-LIV3F-Flash-Updater

thanks time to order a shield to try it out, edit, ok ordered 1 piece of the shield from farnell element14
the module itself cost about 1/3 in low volumes but there is quite a few pieces of auxiliary components, so i decided to just have the shield.
it might be handy to combine that with a nucleo i've some old pieces of gps logger, but i'd guess combined with a good stm32 mcu, i can explore trying more stuff with it, perhaps add a barometer so i can log and check both the track and elevation checking against both gps and air pressure
still thinking about something to do with the on-chip adc, temperature sensor is perhaps one
gps already has the heading so the compass is already built in

de-scrambling gps gold codes from RF is a big challenge, difficult, this module does all that and the processor in it is probably quite a good processor or that there may be some additional gps hardware that does parallel code matching

it would seem even feasible to load a map say from an sd card, the programming may be quite a lot of effort there for that

this gps shield feels like a most 'James Bond' style gadget, a gps shield on a nucleo say stm32f401re, and if i get cheapo maybe cut a copper foil and call it a patch antenna

Well, what I can say is:

received from farnell element14 ! it cost a premium (at least compared to the u-blox Aliexpress types)
but the package itself looked so nice and bundled with a patch antenna, so i'd not even need to cut copper foil.
certainly worth ordering for the fun of it
https://www.st.com/en/ecosystems/x-nucl ... l#overview for the hard core cost cutter digikey has the module itself, less every thing else cost usd 14.22 for a single piece exclude postage (as checked today), discount varies 10 pieces and up
https://www.digikey.com/product-detail/ ... ND/9556693

i went with the shield itself instead as you can visibly see quite a few pieces of auxiliary components, i'd guess going the the bare minimum and sacrificing some functionality like being able to switch off the antenna (TESEO-LIV3F can switch off the antenna with some little additional circuits), it may be possible to interface TESEO-LIV3F from the module alone, it seemed self contained
but certainly review the various app notes especially the hardware one which details the use of additional auxiliary components
https://www.st.com/content/st_com/en/pr ... liv3f.html

That's fine they provide an antenna.

i've not tested out the module yet, but based on specs alone it seemed to be a pretty good one and it support so many GPS systems
gps itself is a large app, second only to mobile and wireless communications e.g. LTE/3GPP etc