[arm-allstar] One of two USB URIs dropping off

[Doug Crompton]

Randy,

Being able to power cycle a remote Pi is very important. There are many
ways to do that as you know so you have to pick the best one for you.

I think the one radio node per Pi especially if both nodes are running
repeaters is a good idea. Management is a lot easier if you use supermon
and configure all nodes on one screen. You can instantly see the status of
everything and have control of all the connections. I have 13 nodes and
servers both local and remote displayed on one supermon screen. Even if you
had multiple supermon screens they could be in adjacent tabs on a browser.


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*

On Sat, Jan 12, 2019 at 12:45 AM "Randy Neals via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> I agree. The suppliers on Amazon for those potted dc dc converters change
> like the weather.
>
> The 3B+ uses an entirely new DC regulator module.
> A custom design for the Raspberry Pi.
>
>
> I’m thinking of using POE Hats and powering my Pi’s from an Ethernet
> switch. If the switch is “Managed”, it also provides a way of turning off
> the port and rebooting the Pi.
>
> The second gen Pi POE Hat would seem like an elegant solution.
>
> I may also revert to a Pi per repeater.
> I dislike having multiple Pi’s to admin and multiple firewall port
> mappings, but I like reliable nodes better :)
>
> https://www.raspberrypi.org/blog/poe-hat-revision/
>
>
>
> On Fri, Jan 11, 2019 at 10:11 PM David McGough <kb4fxc at inttek.net> wrote:
>
> >
> >
> > Hi Randy,
> >
> > Okay, yes, looking at the dmesg output, this issue looks power related,
> > one way or another. Note below that just after the "under voltage"
> > warning, and before the "voltage normalized," the URI(s) aren't happy.
> >
> > The micro-USB power connection on the RPi3b+ may be the problem. Another
> > factor that we've noticed recently is that some brands of the epoxy
> potted
> > 5V3A DC-DC converters don't perform as well as others. Frustrating.
> >
> > A subtle ground loop, even with the hardware in same chassis, might be
> the
> > culprit, too.
> >
> > 73, David KB4FXC
> >
> >
> >
> > On Fri, 11 Jan 2019, Randy Neals wrote:
> >
> > > Hi David,
> > > Thanks for the email...
> > >
> > > Usually just one URI stops. It seems to be the first port, my VHF
> > repeater.
> > > Earlier it seemed like it was alternating with no pattern between
> > repeaters.
> > > (Thus I wasn't suspecting a bad URI)
> > >
> > > No reboot of the system, no hang. Other repeater usually continues to
> > > operate.
> > >
> > > The repeaters are ICOM FR-5000/FR-6000
> > > Both repeater RF modules are in the same metal Icom rack chassis, ie:
> > same
> > > ground for both repeaters.
> > > The Audio and COR/PTT come out on DB25 connector on back of repeater.
> > > 1' cable with signal/audio to URI
> > >
> > > The repeaters are powered from 12VDC power distribution.
> > > 12V power is from a large communications power supply (Switch mode N+1
> > > redundant) with battery backup.
> > >
> > > The 5V Pi power is a DC to DC converter rated at 3 Amps. 12V from the
> > same
> > > distribution as repeater. 5V on micro USB to Pi.
> > > At first I had a different PS, and swapped early thinking that was the
> > > problem.
> > >
> > > The Pi is in an aluminum chassis with a tiny fan.
> > > It is on a rack shelf above the repeater. The Pi chassis is not
> grounded,
> > > but it has 2 USB cable, and the power supply cable to the DC DC
> converter
> > > which may have ground.
> > >
> > > Here's dmesg
> > > I see several "under voltage" messages. That doesn't seem good.
> > >
> > > I rebooted just a few minutes ago. When the URI stops again, I'll run
> > dmesg
> > > again.
> > >
> > >
> > > [    7.215868] sd 0:0:0:0: [sda] Assuming drive cache: write through
> > >
> > > [    7.222428]  sda: sda1
> > >
> > > [    7.227933] sd 0:0:0:0: [sda] Attached SCSI removable disk
> > >
> > > [    8.300598] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex,
> > lpa
> > > 0xD1E1
> > >
> > > [   13.608033] *Under-voltage detected! (0x00050005)*
> > >
> > > [   17.229524] retire_capture_urb*: 119 callbacks suppressed*
> > >
> > > [   21.938034] Voltage normalised (0x00000000)
> > >
> > > [   26.348512] retire_capture_urb*: 18 callbacks suppressed*
> > >
> > <snip>
> >
> > --
> Sent from mobile.
> _______________________________________________
>
> ARM-allstar mailing list
> ARM-allstar at hamvoip.org
> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
>
> Visit the BBB and RPi2/3 web page - http://hamvoip.org