[Dprglist] Need suggestion for expansion boards for STM32 to build a robot
Thalanayar Muthukumar
tnkumar at gmail.com
Thu Oct 21 12:19:09 PDT 2021
Thanks Chris.
I have this Arduino shield (
https://www.amazon.com/gp/product/B01LX9TLP5/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1)
which can possibly be used with the NUCLEO - I may need to confirm that the
voltage levels match. Beyond that, in the initial phase, I have my
I2C(StemmaQT) BN055 and StemmaQT OLED display that I may want to use.
In later stages, after I get my initial STM32 robot moving, may consider
other sensors.
Regards.
- Kumar
On Thu, Oct 21, 2021 at 7:16 AM Christian M Netter <netterchris at gmail.com>
wrote:
> Do you have a rough idea of what type of sensors And actuators and how
> many of each you will be connecting?
>
> That will tell you what type of I/O and how much of each you will need
>
> What is lacking from the nucleo board that you purchased?
>
> Most STM 32 boards probably have enough I/O for a basic robot so you might
> not actually need an expansion.
>
> The only thing you might need is a motor driver.
>
> Chris
>
> On Oct 21, 2021, at 12:05 AM, Thalanayar Muthukumar via DPRGlist <
> dprglist at lists.dprg.org> wrote:
>
>
> 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:
>>
>> 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
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>> >>>>>>>> or, via email, send a message with subject or body 'help' to
>> >>>>>>>> dprglist-request at lists.dprg.org
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>> >>>>>>>> You can reach the person managing the list at
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>> >>>>>>>>
>> >>>>>>>> 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 --------------
>> >>>>>>>> An HTML attachment was scrubbed...
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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
>> >>>>>>>>
>> >>>>>>>> _______________________________________________
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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
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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
>>
>> _______________________________________________
>> DPRGlist mailing list
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>> ------------------------------
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>> End of DPRGlist Digest, Vol 65, Issue 1
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>>
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