There does not seem to be any mention of a BBAI in the original post, but a BBBlue is which does not have a wired Ethernet port.
However, it should be possible, that is if there are the necessary drivers, to connect the RasPi and the BBBlue via USB network and then the Pi to other devices via the wired ethernet port, but this does require some sort of wired network in your config and/or a device acting as an AP, such as the BBBlue, if it is a mobile platform. The other option I suppose would be to do something similar to ROS Serial between the RasPi and the BBBlue to avoid any network stuff between the two. Jon On Mon, Aug 10, 2020 at 12:06 PM Dennis Lee Bieber < [email protected]> wrote: > On Mon, 10 Aug 2020 10:23:40 -0700 (PDT), in > gmane.comp.hardware.beagleboard.user Peter Gaskell > <[email protected]> wrote: > > > >The Beaglebone creates its default SoftAP and connects to a WiFi router > >that has internet. By default, computers connecting to the SoftAP get > the > >internet forwarded to them so both the laptop and the RPi can connect to > >the internet and I can ssh and remote desktop into the RPi from the > laptop > >and ssh into the Beaglebone as well. All three appear on the same LAN > >(192.168.8.0) and all the LCM traffic is visible on the network. > > > > Personally, to reduce interference I'd have all the devices > connect to > the router... If I understand your description, you have the BBbl running > as an access point for other WiFi clients, and also connecting to the > router -- so every WiFi packet it receives from a client has to be resent > to the router. But... > > >The problem I have is this. I would rather have the network connection > >between the Pi and BBBlue be over USB so there is higher bandwidth/lower > >latency connection between them because ultimately the largest share of > >data is going to be produced on the Pi (video / LIDAR messages / maps > >etc.), not the Beaglebone and I would like to be able to decode it on the > >laptop with as little latency as possible. > > ... I wouldn't even use WiFi between the R-Pi and the BBbl. While the > BBx > USB client port does set up a USB network gadget (rndis on 192.168.7.x), I > don't know what it would take to have an R-Pi set up a matching USB gadget > on its host port (plug them together and see if a new network device > appears on the R-Pi?). > > Simpler might be to use a USB<>Ethernet adapter on the BBbl, and a > short length of CAT-5/6 cable to connect to the R-Pi. Since I doubt either > machine is running a DHCPd, you'd have to manually configure the > hostname/IP #s to make a two-node network. > > Once the two nodes are talking, you'd have to configure the BBbl > to use > the R-Pi as the gateway, and configure the R-Pi to route traffic from the > BBbl port to the WiFi port, which is connected to your router. You'd have > the laptop connect to the router also -- the R-Pi should appear on your LAN > list, and you can talk between them. With luck, the BBbl will be reachable > too -- if the R-Pi passes hostname information from it to the router. > > The only way to reduce the latency further would maybe be to use a > small four-port switch and CABLE the BBbl, R-Pi, AND laptop through the > switch (and maybe run DHCP on one of the nodes, so it can assign IP #s to > the other two). After all, the R-Pi4 has gigabit ethernet -- which probably > out-performs WiFi, and would be the fastest connection between the R-Pi and > laptop (unless the laptop only has 100 speed). > > > -- > Dennis L Bieber > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/me53jf55hgs0i1b3t3k18hgo21qbgii1p5%404ax.com > . > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAG99bkptxLaauB14b6ec%3DaRy9hHeGXCwh1cvR213tjqUPXcc_g%40mail.gmail.com.
