[Dprglist] Need suggestion for expansion boards for STM32 to build a robot
Thalanayar Muthukumar
tnkumar at gmail.com
Wed Oct 20 21:05:39 PDT 2021
So far, in the past few months, I have been building Arduino or RPi based
robots.
I decided next, to use the STM32 and ordered a NUCLEO STM32L476RG Kit.
Need suggestions for expansion boards that can help me build a robot.
I see many Arduino shields and Pi Hats, but could not locate the right
expansion board.
Or instead of the NUCLEO kit, should I be looking at other STM32 boards?
I do not want to build a custom board.
Regards.
- Kumar
On Wed, Oct 20, 2021 at 3:51 PM <dprglist-request at lists.dprg.org> wrote:
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> Today's Topics:
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> 1. Re: rtk2go (Karim Virani)
> 2. Thought this was a cool idea.... (pulcher at killercomputing.com)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 19 Oct 2021 19:13:35 -0500
> From: Karim Virani <pondersome64 at gmail.com>
> To: Thalanayar Muthukumar <tnkumar at gmail.com>
> Cc: Iron Reign <ironreignrobotics at gmail.com>, DPRG
> <dprglist at lists.dprg.org>
> Subject: Re: [Dprglist] rtk2go
> Message-ID:
> <
> CAKtnkiz_dD81o3A9L88q2EwV7xzUbVoD2FaSLGuCa4HKhhAFjQ at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Yup. It's not a light decision to go down the road to high precision GPS.
> The required commitment in time is even more than the 10X dollar cost.
> Gotta have a compelling requirement.
>
> On Mon, Oct 18, 2021 at 6:06 PM Thalanayar Muthukumar <tnkumar at gmail.com>
> wrote:
>
> > uBlox F9P is ~275$. I cannot afford it at this point of time.
> >
> > Regards.
> > - Kumar
> >
> > On Mon, Oct 18, 2021 at 6:05 PM Thalanayar Muthukumar <tnkumar at gmail.com
> >
> > wrote:
> >
> >> Thanks @IronReign ... I will check out ublox F9P.
> >>
> >> Regards.
> >> - Kumar
> >>
> >> On Mon, Oct 18, 2021 at 4:00 PM Iron Reign <ironreignrobotics at gmail.com
> >
> >> wrote:
> >>
> >>> Kumar,
> >>>
> >>> Looks like that receiver supports multiple constellations, which is
> >>> nice, but I'm pretty sure it won't have any RTK features, so you're
> looking
> >>> at your normal 2-3 meter accuracy range. RTK receivers are
> significantly
> >>> more expensive and you'll also need to invest in a matching antenna.
> >>> There's a section of my notes the ublox F9P which is the module I'm
> using.
> >>>
> >>> On Mon, Oct 18, 2021 at 3:19 PM Thalanayar Muthukumar via DPRGlist <
> >>> dprglist at lists.dprg.org> wrote:
> >>>
> >>>> I am considering adding (https://www.adafruit.com/product/4415) to my
> >>>> rover.
> >>>>
> >>>> Regards.
> >>>> - Kumar
> >>>>
> >>>> On Mon, Oct 18, 2021 at 1:57 PM Thalanayar Muthukumar <
> >>>> tnkumar at gmail.com> wrote:
> >>>>
> >>>>> Thanks Karim for the fairly detailed succinct :-) answer. Really
> >>>>> appreciate it.
> >>>>> I have downloaded your notes, but have yet to read it.
> >>>>>
> >>>>> As a person who plans to take my rover outdoors,and I plan to have
> >>>>> internet access on my rover, it seems I should
> >>>>> connect to a NTRIP server at rtk2go.com (I live in Allen, TX) and by
> >>>>> doing so, I can get higher accuracy.
> >>>>>
> >>>>> Your email was very helpful, Karim. Thanks.
> >>>>>
> >>>>> Regards.
> >>>>> - Kumar
> >>>>>
> >>>>> On Mon, Oct 18, 2021 at 12:04 PM Karim Virani <
> pondersome64 at gmail.com>
> >>>>> wrote:
> >>>>>
> >>>>>> That's a big topic and it bleeds into everything RTK very quickly.
> So
> >>>>>> I'll try for an almost succinct answer that should provide search
> terms for
> >>>>>> learning more:
> >>>>>>
> >>>>>> RTK gps rovers require a live timing reference from another
> specialty
> >>>>>> GPS receiver with a well-known location known as a base station or
> mount
> >>>>>> point. The base station needs to be somewhat close to the rover's
> location
> >>>>>> - ideally within 10km, but "long baseline" trials indicate you can
> get good
> >>>>>> solutions out to and beyond 50km depending on geography. The data
> coming
> >>>>>> from the base station is usually formatted as RTCM messages but can
> be
> >>>>>> transferred over any link. Often in very remote locations you have
> to set
> >>>>>> up your own base station and you might use a point-to-point radio
> link to
> >>>>>> communicate between rover and base station.
> >>>>>>
> >>>>>> There are also private, commercial and governmental networks of
> these
> >>>>>> correcting base stations. The private ones are usually monetizing
> their own
> >>>>>> and governmental base stations. These tend to be pricey services
> from the
> >>>>>> traditional hobby robotics viewpoint - they are focused on the
> survey and
> >>>>>> agricultural markets. There is a very large free governmental
> network (
> >>>>>> unavco.org) that serves active fault and mountain areas but that's
> >>>>>> mostly on the west coast and the rockies. Texas has a free non-real
> time
> >>>>>> network which can help with post-processing to get a good
> base-station
> >>>>>> fix, but doesn't help with RTK. NASA operates another fairly open
> network,
> >>>>>> but it requires getting an account and authorizing - and I didn't
> want to
> >>>>>> write the authentication code for my robot.
> >>>>>>
> >>>>>> If you have internet access on your rover, one of the ways to get
> >>>>>> RTCM messages is from an NTRIP server. So many of those commercial
> and
> >>>>>> government networks operate NTRIP servers. The leading
> implementation of
> >>>>>> NTRIP is called SNIP and the company that makes SNIP also supports a
> >>>>>> voluntary NTRIP server for people who want to publish their base
> stations -
> >>>>>> known as "mount points" in NTRIP/SNIP land. That network is
> available at
> >>>>>> rtk2go.com It's completely free and requires no authentication to
> >>>>>> use as a client.
> >>>>>>
> >>>>>> Anyhow, if you are still reading and still want to learn more, you
> >>>>>> can also access my project notes
> >>>>>> <
> https://docs.google.com/document/d/1S-OwHQL25ngPYy-97KP6jZPA6bVr2L2PiUL6ix_6Dts/edit?usp=sharing
> >.
> >>>>>> These notes are for my outdoor rovers and as source material for
> videos,
> >>>>>> blog articles and presentations I might want to do, so they are a
> bit
> >>>>>> jumbled up. There is a GPS RTK primer that starts on page 16.
> >>>>>>
> >>>>>> -Karim
> >>>>>>
> >>>>>> On Sun, Oct 17, 2021 at 6:44 PM Thalanayar Muthukumar via DPRGlist <
> >>>>>> dprglist at lists.dprg.org> wrote:
> >>>>>>
> >>>>>>> Hi Karim,
> >>>>>>>
> >>>>>>> What is a rtk2go network and how does one use it?
> >>>>>>>
> >>>>>>> Regards.
> >>>>>>> - Kumar
> >>>>>>>
> >>>>>>> On Sun, Oct 17, 2021 at 4:09 PM <dprglist-request at lists.dprg.org>
> >>>>>>> wrote:
> >>>>>>>
> >>>>>>>> Send DPRGlist mailing list submissions to
> >>>>>>>> dprglist at lists.dprg.org
> >>>>>>>>
> >>>>>>>> To subscribe or unsubscribe via the World Wide Web, visit
> >>>>>>>> http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org
> >>>>>>>> or, via email, send a message with subject or body 'help' to
> >>>>>>>> dprglist-request at lists.dprg.org
> >>>>>>>>
> >>>>>>>> You can reach the person managing the list at
> >>>>>>>> dprglist-owner at lists.dprg.org
> >>>>>>>>
> >>>>>>>> When replying, please edit your Subject line so it is more
> specific
> >>>>>>>> than "Re: Contents of DPRGlist digest..."
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> Today's Topics:
> >>>>>>>>
> >>>>>>>> 1. Re: DPRGlist Digest, Vol 61, Issue 15 (Thalanayar
> Muthukumar)
> >>>>>>>> 2. Re: DPRGlist Digest, Vol 61, Issue 15 (pulcher)
> >>>>>>>> 3. Free SSD drive at Micro Center Dallas (Thalanayar
> Muthukumar)
> >>>>>>>> 4. Interesting techniques for 'making & decorating'
> mechetronics
> >>>>>>>> (Carl Ott)
> >>>>>>>> 5. Re: RTK corrections source in DFW area? (Karim Virani)
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> ----------------------------------------------------------------------
> >>>>>>>>
> >>>>>>>> Message: 1
> >>>>>>>> Date: Sat, 16 Oct 2021 16:45:47 -0500
> >>>>>>>> From: Thalanayar Muthukumar <tnkumar at gmail.com>
> >>>>>>>> To: dprglist-request at lists.dprg.org
> >>>>>>>> Cc: dprglist at lists.dprg.org
> >>>>>>>> Subject: Re: [Dprglist] DPRGlist Digest, Vol 61, Issue 15
> >>>>>>>> Message-ID: <C6BFCA25-36F9-4F55-8CE3-22C187F8F347 at gmail.com>
> >>>>>>>> Content-Type: text/plain; charset=us-ascii
> >>>>>>>>
> >>>>>>>> Micro center Dallas say they are currently sold out
> >>>>>>>>
> >>>>>>>> Sent from my iPhone
> >>>>>>>>
> >>>>>>>> > On Oct 16, 2021, at 4:04 PM, dprglist-request at lists.dprg.org
> >>>>>>>> wrote:
> >>>>>>>> >
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> ------------------------------
> >>>>>>>>
> >>>>>>>> Message: 2
> >>>>>>>> Date: Sat, 16 Oct 2021 17:24:35 -0500
> >>>>>>>> From: pulcher <pulcher at killercomputing.com>
> >>>>>>>> To: Thalanayar Muthukumar <tnkumar at gmail.com>,
> >>>>>>>> dprglist-request at lists.dprg.org
> >>>>>>>> Cc: dprglist at lists.dprg.org
> >>>>>>>> Subject: Re: [Dprglist] DPRGlist Digest, Vol 61, Issue 15
> >>>>>>>> Message-ID:
> >>>>>>>> <
> mailman.2.1634503868.1684.dprglist-dprg.org at lists.dprg.org
> >>>>>>>> >
> >>>>>>>> Content-Type: text/plain; charset="utf-8"
> >>>>>>>>
> >>>>>>>> Wife just picked one up.? 2 minutes ago.HaroldSent from my
> T-Mobile
> >>>>>>>> 4G LTE Device
> >>>>>>>> -------- Original message --------From: Thalanayar Muthukumar via
> >>>>>>>> DPRGlist <dprglist at lists.dprg.org> Date: 10/16/21 4:45 PM
> >>>>>>>> (GMT-06:00) To: dprglist-request at lists.dprg.org Cc:
> >>>>>>>> dprglist at lists.dprg.org Subject: Re: [Dprglist] DPRGlist Digest,
> >>>>>>>> Vol 61, Issue 15 Micro center Dallas say they are currently sold
> outSent
> >>>>>>>> from my iPhone> On Oct 16, 2021, at 4:04 PM,
> >>>>>>>> dprglist-request at lists.dprg.org wrote:>
> >>>>>>>> _______________________________________________DPRGlist mailing
> >>>>>>>> listDPRGlist at lists.dprg.orghttp://
> >>>>>>>> lists.dprg.org/listinfo.cgi/dprglist-dprg.org
> >>>>>>>> -------------- next part --------------
> >>>>>>>> An HTML attachment was scrubbed...
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> >>>>>>>>
> http://lists.dprg.org/pipermail/dprglist-dprg.org/attachments/20211016/a33a2617/attachment.html
> >>>>>>>> >
> >>>>>>>>
> >>>>>>>> ------------------------------
> >>>>>>>>
> >>>>>>>> Message: 3
> >>>>>>>> Date: Sat, 16 Oct 2021 19:13:12 -0500
> >>>>>>>> From: Thalanayar Muthukumar <tnkumar at gmail.com>
> >>>>>>>> To: pulcher <pulcher at killercomputing.com>
> >>>>>>>> Cc: dprglist-request at lists.dprg.org, dprglist at lists.dprg.org
> >>>>>>>> Subject: [Dprglist] Free SSD drive at Micro Center Dallas
> >>>>>>>> Message-ID: <205ADA38-0DFD-4C11-8C29-1DE15791571A at gmail.com>
> >>>>>>>> Content-Type: text/plain; charset="utf-8"
> >>>>>>>>
> >>>>>>>> I went to the store just now and picked one up as well. Thanks
> >>>>>>>> Harold.
> >>>>>>>>
> >>>>>>>> Regards.
> >>>>>>>> - Kumar
> >>>>>>>>
> >>>>>>>> Sent from my iPhone
> >>>>>>>>
> >>>>>>>> > On Oct 16, 2021, at 5:24 PM, pulcher <
> pulcher at killercomputing.com>
> >>>>>>>> wrote:
> >>>>>>>> >
> >>>>>>>> > ?
> >>>>>>>> > Wife just picked one up. 2 minutes ago.
> >>>>>>>> >
> >>>>>>>> > Harold
> >>>>>>>> >
> >>>>>>>> >
> >>>>>>>> >
> >>>>>>>> > Sent from my T-Mobile 4G LTE Device
> >>>>>>>> >
> >>>>>>>> >
> >>>>>>>> > -------- Original message --------
> >>>>>>>> > From: Thalanayar Muthukumar via DPRGlist <
> dprglist at lists.dprg.org
> >>>>>>>> >
> >>>>>>>> > Date: 10/16/21 4:45 PM (GMT-06:00)
> >>>>>>>> > To: dprglist-request at lists.dprg.org
> >>>>>>>> > Cc: dprglist at lists.dprg.org
> >>>>>>>> > Subject: Re: [Dprglist] DPRGlist Digest, Vol 61, Issue 15
> >>>>>>>> >
> >>>>>>>> > Micro center Dallas say they are currently sold out
> >>>>>>>> >
> >>>>>>>> > Sent from my iPhone
> >>>>>>>> >
> >>>>>>>> > > On Oct 16, 2021, at 4:04 PM, dprglist-request at lists.dprg.org
> >>>>>>>> wrote:
> >>>>>>>> > >
> >>>>>>>> > _______________________________________________
> >>>>>>>> > DPRGlist mailing list
> >>>>>>>> > DPRGlist at lists.dprg.org
> >>>>>>>> > http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org
> >>>>>>>> -------------- next part --------------
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> >>>>>>>>
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> >>>>>>>> >
> >>>>>>>>
> >>>>>>>> ------------------------------
> >>>>>>>>
> >>>>>>>> Message: 4
> >>>>>>>> Date: Sun, 17 Oct 2021 09:48:21 -0500
> >>>>>>>> From: Carl Ott <carl.ott.jr at gmail.com>
> >>>>>>>> To: DPRG D-List <dprglist at dprg.org>
> >>>>>>>> Subject: [Dprglist] Interesting techniques for 'making &
> decorating'
> >>>>>>>> mechetronics
> >>>>>>>> Message-ID:
> >>>>>>>> <
> >>>>>>>>
> CA+XqQZTVWYVt6B8078wRecqy0JyuD7vEQi2xE9XkQfLd5t5rZQ at mail.gmail.com>
> >>>>>>>> Content-Type: text/plain; charset="utf-8"
> >>>>>>>>
> >>>>>>>> video starts with the final product
> >>>>>>>>
> >>>>>>>> Techniques are pretty interesting.
> >>>>>>>> Build time-lapse starts circa 2:20...
> >>>>>>>> https://youtu.be/rSh0x0GagcQ
> >>>>>>>> -------------- next part --------------
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> >>>>>>>> >
> >>>>>>>>
> >>>>>>>> ------------------------------
> >>>>>>>>
> >>>>>>>> Message: 5
> >>>>>>>> Date: Sun, 17 Oct 2021 15:03:01 -0500
> >>>>>>>> From: Karim Virani <pondersome64 at gmail.com>
> >>>>>>>> To: Doug Paradis <paradug at gmail.com>, DPRG <
> dprglist at lists.dprg.org
> >>>>>>>> >
> >>>>>>>> Cc: Paul Bouchier <paul.bouchier at gmail.com>
> >>>>>>>> Subject: Re: [Dprglist] RTK corrections source in DFW area?
> >>>>>>>> Message-ID:
> >>>>>>>> <CAKtnkiwq82PVV4riXMP=
> >>>>>>>> 5H9zaTnec3-YE5KJz3pH9TDyPZeNtg at mail.gmail.com>
> >>>>>>>> Content-Type: text/plain; charset="utf-8"
> >>>>>>>>
> >>>>>>>> Hey Paul,
> >>>>>>>>
> >>>>>>>> I've been using the rtk2go network. It's just a voluntary network,
> >>>>>>>> so
> >>>>>>>> there's no guarantee that the base stations are correct to a known
> >>>>>>>> precision, nor is there an uptime guarantee. It's also very
> sparsely
> >>>>>>>> populated in north Texas:
> >>>>>>>>
> >>>>>>>> [image: image.png]
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> But I've found the VN1 mount point in Richardson to be very stable
> >>>>>>>> and
> >>>>>>>> accurate for the last year - though it has had some outages.I've
> >>>>>>>> been able
> >>>>>>>> to use it up to 35km away and still get an error bar that I can't
> >>>>>>>> reliably
> >>>>>>>> measure.
> >>>>>>>>
> >>>>>>>> The Arlington mount point also seems stable - it's been there for
> >>>>>>>> at least
> >>>>>>>> 6 months - but I haven't used it. Others pop up from time to time
> >>>>>>>> but
> >>>>>>>> haven't lasted long. I've published a base station on rtk2go for
> >>>>>>>> short test
> >>>>>>>> runs, but have yet to mount my antenna on my roof for a stable
> >>>>>>>> offering.
> >>>>>>>>
> >>>>>>>> Best,
> >>>>>>>>
> >>>>>>>> Karim
> >>>>>>>>
> >>>>>>>> On Sun, Oct 17, 2021 at 12:40 PM Doug Paradis <paradug at gmail.com>
> >>>>>>>> wrote:
> >>>>>>>>
> >>>>>>>> > Paul,
> >>>>>>>> > The correct address for the mailing list is
> >>>>>>>> dprglist at lists.dprg.org.
> >>>>>>>> > BTW, Karim has been working with GPS RTK and has used several
> free
> >>>>>>>> > correction data stations in the area.
> >>>>>>>> > Regards,
> >>>>>>>> > Doug P.
> >>>>>>>> >
> >>>>>>>> > On Sun, Oct 17, 2021 at 12:35 PM Paul Bouchier <
> >>>>>>>> paul.bouchier at gmail.com>
> >>>>>>>> > wrote:
> >>>>>>>> >
> >>>>>>>> >> Hi Doug - long time no see.
> >>>>>>>> >>
> >>>>>>>> >> I tried to send the email below to the dprg list. You can see I
> >>>>>>>> used the
> >>>>>>>> >> address dprglist at dprg.org, which is what Carl told me to use.
> >>>>>>>> It didn't
> >>>>>>>> >> go through. Do I have the address wrong? Anything else you can
> >>>>>>>> think of?
> >>>>>>>> >>
> >>>>>>>> >> Thanks for any ideas you might have
> >>>>>>>> >>
> >>>>>>>> >> Paul Bouchier
> >>>>>>>> >>
> >>>>>>>> >> ---------- Forwarded message ---------
> >>>>>>>> >> From: Paul Bouchier <paul.bouchier at gmail.com>
> >>>>>>>> >> Date: Thu, Oct 14, 2021 at 5:24 PM
> >>>>>>>> >> Subject: RTK corrections source in DFW area?
> >>>>>>>> >> To: <dprglist at dprg.org>
> >>>>>>>> >>
> >>>>>>>> >>
> >>>>>>>> >> Does anyone know of any free or low-cost stations that provide
> >>>>>>>> internet
> >>>>>>>> >> access to GPS RTK corrections data for the Dallas/Fort Worth
> >>>>>>>> area?
> >>>>>>>> >> Apparently TXDOT has NTRIP servers and makes historical data
> >>>>>>>> available but
> >>>>>>>> >> AFICT doesn't provide live data. Looking for corrections data
> to
> >>>>>>>> feed to an
> >>>>>>>> >> RTK receiver so I don't have to set up my own base station.
> >>>>>>>> >> Thanks
> >>>>>>>> >> Paul
> >>>>>>>> >>
> >>>>>>>> >
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> >>>>>>>>
> >>>>>>>> ------------------------------
> >>>>>>>>
> >>>>>>>> Subject: Digest Footer
> >>>>>>>>
> >>>>>>>> _______________________________________________
> >>>>>>>> DPRGlist mailing list
> >>>>>>>> DPRGlist at lists.dprg.org
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> >>>>>>>>
> >>>>>>>> ------------------------------
> >>>>>>>>
> >>>>>>>> End of DPRGlist Digest, Vol 62, Issue 1
> >>>>>>>> ***************************************
> >>>>>>>>
> >>>>>>> _______________________________________________
> >>>>>>> DPRGlist mailing list
> >>>>>>> DPRGlist at lists.dprg.org
> >>>>>>> http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org
> >>>>>>>
> >>>>>> _______________________________________________
> >>>> DPRGlist mailing list
> >>>> DPRGlist at lists.dprg.org
> >>>> http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org
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> ------------------------------
>
> Message: 2
> Date: Wed, 20 Oct 2021 14:51:47 -0500
> From: <pulcher at killercomputing.com>
> To: "'DPRG D-List'" <dprglist at dprg.org>
> Subject: [Dprglist] Thought this was a cool idea....
> Message-ID: <019f01d7c5eb$eabe1070$c03a3150$@killercomputing.com>
> Content-Type: text/plain; charset="us-ascii"
>
> No idea of really what to do with it. As you don't generally all the pins
> lining up in grouped enough ways...
>
>
>
> I haven't really looked at the groupings too hard, so they may be useful.
>
>
>
> AmazonSmile: RJ45 GPIO Pinout Breakout Board for Raspberry Pi 1A+ 1B+ 2B 3B
> 3B+ 3A+ 4B Zero-W : Electronics
> <
> https://smile.amazon.com/gp/product/B08PZ5H2BP?ref=em_1p_8_im&ref_=pe_37301
> 40_609534790>
>
>
>
> Harold
>
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>
> Subject: Digest Footer
>
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