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SBC's

2020-12-27 by: Jonathan Calloway
From: Jonathan Calloway 
------------------------------------------------------

Greetings!

I haven=E2=80=99t posted in awhile, and so I hope everyone is doing =
well. =20

I=E2=80=99m curios - is there anyone on the list who messes with =
SBC=E2=80=99s, including Pi and Arduino?  Has anyone had good =
experiences with ODroid?   What do you use them for? Any good projects =
as of late?

Thanks!

=



=============================================================== From: Ed King ------------------------------------------------------ I am constantly tinkering with SBC's Oh wait..=C2=A0 you meant single board computer not small block Chevy.=C2= =A0=C2=A0 Nevermind=C2=A0 On Saturday, December 26, 2020, 09:55:09 PM EST, Jonathan Calloway wrote: =20 =20 =20 Greetings! I haven=3DE2=3D80=3D99t posted in awhile, and so I hope everyone is doing = =3D well. =3D20 I=3DE2=3D80=3D99m curios - is there anyone on the list who messes with =3D SBC=3DE2=3D80=3D99s, including Pi and Arduino?=C2=A0 Has anyone had good = =3D experiences with ODroid?=C2=A0 What do you use them for? Any good projects = =3D as of late? Thanks! =3D =20

=============================================================== From: Jonathan Calloway ------------------------------------------------------ I didn=E2=80=99t mean Southern Baptist Church either!=20 :) wrote: wrote: doing =3D =3D =3D

=============================================================== From: Stephen Kraus ------------------------------------------------------ I do a lot with Raspi's and Arduinos, I have a large collection. =3D =3D

=============================================================== From: Jonathan Calloway ------------------------------------------------------ Can you define that a little more? What=E2=80=99s in your collection? = What do you do with them? wrote: = wrote: = wrote: doing =3D with =3D =3D

=============================================================== From: Joe Freeman ------------------------------------------------------ I'll try to get pictures when I get home later, but I'm using a Pi 4 in a waterproof enclosure with a NoElec SDR, NoElec LNA/filter for 1690mhz, and a 2.4Ghz Parabolic Grid Antenna to get images directly off the GOES-16/GOES East geosynchronous satellite. The only cable external to this system is the power cable. Right now I'm using the built-in WiFI on the Pi4 to reach the rest of the network. I've run the rx and decode software on the Pi 4 concurrently, but have had problems getting the images out over wifi to my NAS consistently, so I'm looking to send the raw I/Q data from the RX software to a copy of the image decode software running on another, beefier machine as the Pi 4 looks to be cpu bound when I try to SCP the images to the NAS. I haven't tried to NFS mount the NAS from the Pi yet, either. hat do : g =3D =3D =3D

=============================================================== From: Stephen Kraus ------------------------------------------------------ Mostly use the Raspberry Pi's for pentesting engagements, as for embedded stuff I use the ESP32s more than I do Arduino branded stuff, since the ESP32 has about the same footprint as the basic Arduino but a lot more features (including Bluetooth/Wifi) Most recent build was a keychain Geiger Counter using the TTGO ESP32 LCD Board: https://www.amazon.com/ICQUANZX-T-Display-Bluetooth-Development-Arduino/dp/= B07VNG9D52/ref=3Dsr_1_15?crid=3DRIYZNFFCA98G&dchild=3D1&keywords=3Dttgo+esp= 32+display&qid=3D1609164374&sprefix=3DTTG%2Caps%2C170&sr=3D8-15 I also have a bunch of Raspi alternatives like Orange Pi and Banana Pi models, I really like the Banana Pi Zero over the Raspi Pi Zero, since it retains the Quad Core versus the Raspi Pi's single core. http://www.banana-pi.org/m2z.html hat do : g =3D =3D =3D

=============================================================== From: Michael Harrison ------------------------------------------------------ I do a little more than messing with "SBC's". Things I've learned: rPi's and clones are limited by TF/SD cards.. as well as enabled by them. For serious use, the units like Libre Computing Renegades with eMMC on the board rock. rPi's are seriously io-limited, several others are not. rPi's running "Raspian" have a lot of weird ways of doing things, like 'raspi-config' that I'd rather run straight up Debian or Armbian that are more like a real Linux standard system (whatever that is). On the good; rPi's are extremely well documented, with lots of sample code and projects to share. rPi 4's are.. well... impressive. Depending on the board, support and documentation for things like GPIO, I2C and USB vary. For example in the Libre Boards, GPIO 11 turns the ethernet on/off, not a pin on the board. For my uses, the defining difference is OS support. Great hardware stuck on a weird distro or kernel can be a real limiting factor unless you really really want to build from scratch. https://wiki.debian.org/InstallingDebianOn/Allwinner Is a good place to start evaluating hardware and OS support. Re: Odroid. Nice hardware until you realize the pins are all 3v and you have to buy adapter boards for 5v GPIO. Current favorite commodity boards: Nanopi Neo 3 LTS, Libre Computing Renegade, rPi 4

=============================================================== From: Aaron welch ------------------------------------------------------ That sounds super cool. Do you have any links on how you are doing that and what is available? -A d ES h d ks to What do ng =3D =3D =3D Aaron Welch Chief Mechanic @ Geek Ventures 423-505-9999 n2nightfall@gmail.com "Enabling people to do great things with their own ideas."

=============================================================== From: Joe Freeman ------------------------------------------------------ Here's a link that got me started, but there are a number of them out there= - https://gist.github.com/lxe/c1756ca659c3b78414149a3ea723eae2#file-goes16-rt= lsdr-md My setup is only slightly different. I'm using a 3ft LMR400 jumper (N-male to SMA-male) for the connection between the antenna and the LNA/filter, then an SMA male to male "barrel" between the LNA and the SDR. I've got a 3ft usb extension cable connected to the SDR that's connected to the USB port on the Pi4. All of this is inside a weatherproof enclosure (NID box) I got from Amazon - https://www.amazon.com/gp/product/B085LKW31D/ref=3Dppx_yo_dt_b_asin_title_o= 02_s00?ie=3DUTF8&psc=3D1 . I used 10ft of 14/3 and some legrand NEMA 5-15 connectors to bring AC into the box, where I'm plugging the 3.5A USB-C power supply in for the Pi4. I tossed around using a PoE PiHat but decided I didn't want to run an ethernet cable from my PoE switch outside to the antenna. I printed a mounting plate for the Pi4 to attach it to the mounting holes inside the enclosure. Future upgrades include: 1) Printing an adapter for the antenna mount to allow the antenna to be skewed left or right up to 25 degrees to allow matching to the satellite polarity - primarily in an attempt to pick up a few more db of signal. Around Chattanooga, polarization skew for GOES-16 is about 13 degrees I think. 2) setting up a chron job with a script to turn the images into an animated gif or other type of media file so that motion over time can be observed by sequencing the pictures together. 3) adding a web front end so I can easily get to all this from outside the house. Joe a nd OES ch he oks to What do : ing =3D =3D =3D =3D

=============================================================== From: Dave Brockman ------------------------------------------------------ ng =3D =3D =3D I was going to say anything that runs Debian, can be made into a decent Session Border Controller, but then I read the rest of the thread, and that's not what you are asking :) I keep buying all the new Pi versions, but really don't end up doing anything with them. The lack of multiple (real, not USB bridged) Ethernet interfaces reduces their usefulness to me. I end up spending ~$250 to get a J3060 with 4GB RAM/32GB SSD, dual 1GBE Intel interfaces that I find infinitely more useful. Cheers! -Dave

=============================================================== From: Stephen Haywood ------------------------------------------------------ A Pi4 with dual ethernet would be awesome. I could make a nice firewall/DNS filter with that. -- Stephen Haywood OSCP, OSCE 423.305.3700

=============================================================== From: Andrew Rodgers ------------------------------------------------------ I'm really impressed with the new NanoPi R4S with RK3399 chipset

=============================================================== From: Joe Freeman ------------------------------------------------------ I'd really like to find an SBC with an SFP/SFP+ optical cage.

=============================================================== From: Dave Brockman ------------------------------------------------------ They exist, but are more in the $600-$800 range, and live in distributor only land. Cheers, -Dave

=============================================================== From: "Alex Smith (K4RNT)" ------------------------------------------------------ ODROID-H2+ =E2=80=94 ameriDroid This is only $134.95, has 2x 2.5GbE (Realtek RTL8125B), two SO-DIMM slots for DDR4-2400 (max 32GB), and one M.2 NVMe (PCI-E 2.0 x4) and two SATA III ports. I recommend an eMMC module for the ODROID boxes. Toodles! " 'With the first link, the chain is forged. The first speech censured, the first thought forbidden, the first freedom denied, chains us all irrevocably.' Those words were uttered by Judge Aaron Satie as wisdom and warning... The first time any man's freedom is trodden on, we=E2=80=99re al= l damaged." - Jean-Luc Picard, quoting Judge Aaron Satie, Star Trek: TNG episode "The Drumhead" - Alex Smith - Lacey, Washington (Olympia, WA metropolitan area)