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Re: [Foam-extend-developers] foam-extend on tiny machines...
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From: Martin B. <bea...@gm...> - 2015-10-29 13:19:45
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On Thu, Oct 29, 2015 at 1:31 AM, Martin Beaudoin <bea...@gm...> wrote: > > On Wed, Oct 28, 2015 at 9:36 PM, Martin Beaudoin < > bea...@gm...> wrote: > >> >> >> On Wed, Oct 28, 2015 at 7:45 PM, Bernhard Gschaider <bgs...@ic...> >> wrote: >> >>> -----BEGIN PGP SIGNED MESSAGE----- >>> Hash: SHA1 >>> >>> Am 29.10.15 um 00:12 schrieb Martin Beaudoin: >>> >>> > > As for using such small systems for the Workshop USB stick, if w >>> e can >>> > > figure out a way to USB tether a RaspBerry Pi2 with a normal lap >>> top + >>> > > some kind of terminal app. so we can simply ssh through the USB >>> link, >>> > > then we could have cheaper solution than the Intel stick. >>> > > >>> > > Here is a rough estimate of the cost in USD$, based on the units >>> I have >>> > > bought so far: >>> > > >>> > > * RaspBerry Pi 2 Model B : 35$ >>> > > * 32GB Ultra MicroSDHC Class 10 card: 15$ >>> > > * A Raspberry Pi2 case : 10$ >>> > > * A USB cable for power and tether : 5$ >>> > > >>> > > For a total of roughly 65 $USD. >>> > > >>> > > And a 32GB card is slightly roomy. The OS is free, and the recip >>> e to >>> > > deploy foam-extend over this device is known. >>> > > >>> > > And we are still not talking bulk pricing here. I am sure we can >>> shave a >>> > > few $ if we buy a 100 of those... >>> > > >>> > > So the only piece of the puzzle remaining is a little bit of sof >>> tware >>> > > for USB tethering.... >>> > > >>> > > Maybe we can do all this as well with an Intel Compute stick. Bo >>> th >>> > > solutions would be way cool... >>> > >>> > But the ultimate decision is of course with the Workshop organizer >>> . >>> > Because of course the logistics for the production of USB-keys is >>> > already known >>> > >>> > But lets see if we find something >>> > >>> > >>> > Some other possible avenues to link a Pi2 with a good old >>> > Linux/Mac/Windows laptop: >>> > >>> > * Ethernet to Ethernet using an Ethernet crossover patch cable. >>> > Needs an Ethernet port on the laptop, which no longer comes standa >>> rd >>> > on some laptops (MacBook Air) >>> > Probably needs to add some kind of additional network routing to >>> > make this work while the laptop is still connected to the OFW wifi >>> > hotspot >>> >>> Something like this >>> http://diyhacking.com/connect-raspberry-pi-to-laptop-display/ >>> >>> What is not funny here is that for every OS setting up the network is >>> different (plus that some people might not have the privileges for this) >>> >> >> Yep, not an attractive solution for a whole group of various and >> different platforms or OSes. >> Too much time will be needed to set this up prior to starting the >> trainings and such... >> >>> >>> > * Wifi access >>> > We can transform the Pi2 as a Wifi Access point so the laptop can >>> > establish a WIFI connection directly with the Pi2. >>> > We need to add a decent WIFI USB dongle to the Pi2 (+ ~12 USD$) >>> > Having a room full of 10s of little WIFI Access points/routers wou >>> ld >>> > be a very funny and probably inextricable mess >>> >>> And every RasPi would have to be setup differently so that it can be >>> paired (otherwise Joe will connect to Abduhls RasPi) >>> >>> Note really feasible >>> >> >> Indeed. >> >> >>> >>> > * Serial over USB >>> > The laptop would connect unidirectionally the Pi2 using an emulat >>> ed >>> > serial/terminal console available over one of the 4 USB ports >>> > available on the Pi2 >>> > Ohhhhhhh, maybe we have something worth exploring here too..... >>> > Kermit anyone? LOL :):) >>> >>> http://workshop.raspberrypiaustralia.com/usb/ttl/connecting/2014/08/31/0 >>> 1-connecting-to-raspberry-pi-via-usb/ >>> <http://workshop.raspberrypiaustralia.com/usb/ttl/connecting/2014/08/31/01-connecting-to-raspberry-pi-via-usb/> >>> >>> Needs additional hardware and the correct cable >>> >>> >> And we cannot run paraview over a mere ASCII console.... Not a great all >> around solution. >> >> >>> > * TCP/IP over USB >>> > Looks like we need a special kind of cable for this >>> > Still investigating.... >>> > >>> > But definitely, the USB port is probably the most universal connector >>> > still available on a multitude of hardware platforms. Let's find a way >>> > to talk to this little guy... >>> >>> I can't think of another way than the ones you listed. To be honest: >>> none of them convinces me when I think of the support problems they're >>> going to raise. But I'll keep looking >>> >>> >> Yup, we need something easy to setup, and based on some really common >> laptop applications like Putty or MobaXterm for Windows, or X Windows over >> ssh for OSX or Linux. The complexity of this setup has to remain on the Pi2 >> side so we can configure it correctly ourselves prior to distributing these >> little beast... >> >> Going back hunting... >> >> > Looks like there is no way around it, a USB to USB connection requires a > fancy USB Bridge cable with some electronics embedded in the cable. > Basically, USB cannot do host to host without this kind of device. See here > for the details : http://www.linux-usb.org/usbnet/ > > So it looks to me the best and most flexible option now becomes using the > Pi2 Ethernet port + short Ethernet cable + Ethernet to USB adapter. > > I can find on Amazon some USB 2.0 to 10/100 Fast Ethernet LAN Wired > Network Adapter for about 20 $USD. > A short flat Ethernet cable can be bought for about 1$. > Still bearable. > > For laptops having there own embedded Ethernet port, the Ethernet to USB > adapter is not necessary, of course, but still remains convenient when > going back to the office and having to plug back into the wired corporate > network while still keeping connected with the Pi2. For laptops like the > MacBook Air lacking an embedded Ethernet port, such Ethernet adapters would > be necessary to connect to the Pi2 over Ethernet. > > So the challenge is now to find a simple Ethernet to Ethernet network > setup that will work for Windows, OSX and Linux. > Configuring the Pi2 to act as a local DHCP server for this Ethernet link > might be a good starting point. > I already got a similar setup for my little Pi2 cluster. Let's try to see > if I can make this fly... > Yep, it does fly quite well... Martin > Martin > > Martin >> >> >>> Bernhard >>> >>> >>> > >>> > Martin >>> > >>> > >>> > >>> > Bernhard >>> > >>> > >>> > > >>> > > Martin >>> > > >>> > > >>> > > >>> > > >>> > ------------------------------------------------------------------ >>> - ------------ >>> > > >>> > > >>> > > >>> > > _______________________________________________ >>> > > Foam-extend-developers mailing list >>> > > Foa...@li... >>> > <mailto:Foa...@li...> >>> > > https://lists.sourceforge.net/lists/listinfo/foam-extend-develop >>> ers >>> > > >>> > >>> > ------------------------------------------------------------------ >>> - ------------ >>> > _______________________________________________ >>> > Foam-extend-developers mailing list >>> > Foa...@li... >>> > <mailto:Foa...@li...> >>> > https://lists.sourceforge.net/lists/listinfo/foam-extend-developer >>> s >>> > >>> > >>> > >>> > >>> > -- >>> > Martin Beaudoin >>> > >>> > >>> > ---------------------------------------------------------------------- >>> - -------- >>> > >>> > >>> > >>> > _______________________________________________ >>> > Foam-extend-developers mailing list >>> > Foa...@li... >>> > https://lists.sourceforge.net/lists/listinfo/foam-extend-developers >>> > >>> -----BEGIN PGP SIGNATURE----- >>> Comment: GPGTools - https://gpgtools.org >>> >>> iEYEARECAAYFAlYxXi4ACgkQXIMfp1I+9MEjOgCeN0dcd5j9TqScrP5n6zvtBMfV >>> dL0AnAgFDr+5yBuLq1jxJi5H7P2+38Ab >>> =0kAP >>> -----END PGP SIGNATURE----- >>> >>> >>> ------------------------------------------------------------------------------ >>> _______________________________________________ >>> Foam-extend-developers mailing list >>> Foa...@li... >>> https://lists.sourceforge.net/lists/listinfo/foam-extend-developers >>> >> >> >> >> -- >> Martin Beaudoin >> > > > > -- > Martin Beaudoin > -- Martin Beaudoin |
