[arm-allstar] UPS Suggestions...

Sean McCarthy smccarthy61 at gmail.com
Fri Jul 13 13:40:28 EST 2018 

Update: I have found the PI Uptime UPS board inadequate for any serious
deployments. The unit fails to maintain within %5 as soon as power is lost
and (<4.75v) continues to drop to unacceptable levels (~4.1v) before
shutting the PI down.

FYI...

On Thu, Jul 5, 2018 at 7:53 PM, "Doug Crompton via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> Larry and all,
>
>  The power control boards are available from George, WB3DZZ -
> ggianios at verizon.net
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
>
>
> On Thu, Jul 5, 2018 at 7:01 PM, "Larry via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > Doug any additional info about the boards as to cost and order point?
> >
> > Larry - N7FM
> >
> > On 07/02/2018 07:52 AM, "Doug Crompton via arm-allstar" wrote:
> >
> >> I want to make everyone aware that in the howto's at hamvoip.org there
> >> is a
> >> power shutdown circuit that will shutdown
> >>   the Pi and any associated radio properly upon power failure and return
> >> power when it comes back up. We had boards made to do this which are
> >> available unpopulated or wired.
> >>
> >> https://hamvoip.org/hamradio/power_shutdown_monitor/
> >>
> >> ​While this is different than a UPS backup as it does not sustain
> >> operation
> >> in a power failure it might work in some applications. It was intended
> for
> >> unattended power shutdown in a portable or mobile application.
> >> ​
> >>
> >> *73 Doug*
> >>
> >> *WA3DSP*
> >>
> >> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
> >>
> >>
> >>
> >> On Mon, Jul 2, 2018 at 10:44 AM, "Sean McCarthy via arm-allstar" <
> >> arm-allstar at hamvoip.org> wrote:
> >>
> >> The script in case anyone else would like to take a look...
> >>>
> >>> On Mon, Jul 2, 2018 at 10:33 AM Sean McCarthy <smccarthy61 at gmail.com>
> >>> wrote:
> >>>
> >>> Jesse,
> >>>>
> >>>> What did you need to do to get the script to run? I followed the
> >>>> instructions from Alchemy with no luck, but it was written for
> >>>>
> >>> Rasberrian,
> >>>
> >>>> so theres that...
> >>>>
> >>>> Here is my failure:
> >>>>
> >>>> [root at K8FBI UPS]# sudo python GPIO-shutdown-sample.py
> >>>> Traceback (most recent call last):
> >>>>    File "GPIO-shutdown-sample.py", line 32, in <module>
> >>>>      import RPi.GPIO as GPIO
> >>>> ImportError: No module named 'RPi'
> >>>> [root at K8FBI UPS]#
> >>>>
> >>>> Thanks!
> >>>>
> >>>> On Thu, Jun 28, 2018 at 10:21 PM "Jesse Royall via arm-allstar" <
> >>>> arm-allstar at hamvoip.org> wrote:
> >>>>
> >>>> Sean,
> >>>>> Yes it will restart when power is applied and will start charging
> >>>>> again.
> >>>>> If you do a shutdown then no. You have to remove power and apply it
> to
> >>>>> start back up. But it will start up if the batteries go dead and
> power
> >>>>> comes back on. It has a smart charge built on. You setup a python
> >>>>>
> >>>> script to
> >>>
> >>>> monitor the voltage and it will initiate a safe power down before they
> >>>>>
> >>>> go
> >>>
> >>>> dead. Then when they go dead it will restart the pi when power is
> >>>>>
> >>>> applied
> >>>
> >>>> back to charge the batteries. What sold me is that one power supply to
> >>>>> power the ups then since it’s a hat, it supplies the pi with power on
> >>>>>
> >>>> the
> >>>
> >>>> header. If the cells go bad you just replace them like AA batteries.
> You
> >>>>> can replace them one at a time without loosing power. You can also
> >>>>> stack
> >>>>> them to increase the battery time and they have connections to daisy
> >>>>>
> >>>> them
> >>>
> >>>> and charge the next ups. Has a reset button on board to force a
> restart
> >>>>> when pressed. The only problem I’ve had is I had one bad cell once
> and
> >>>>>
> >>>> it
> >>>
> >>>> would take the other cell down with it. But the voltage monitor would
> >>>>>
> >>>> catch
> >>>
> >>>> it and shut down the pi when unplugged it. The other is when picking
> up
> >>>>>
> >>>> the
> >>>
> >>>> pi, I had a habit of hitting the reset accidentally.
> >>>>>
> >>>>> I’m was working on a script to watch the voltage and when it sees a
> >>>>> voltage drop it tells you via courtesy tone your on battery and
> >>>>> possibly
> >>>>> speak voltage at intervals. Since the cron job looks for low voltage
> to
> >>>>> safe power down I figure I could use that check to report back to
> >>>>>
> >>>> allstar
> >>>
> >>>> and either tattle via tone or voice.
> >>>>>
> >>>>>
> >>>>> Sent from my iPhone
> >>>>>
> >>>>> On Jun 28, 2018, at 10:11 AM, Sean McCarthy via arm-allstar <
> >>>>>>
> >>>>> arm-allstar at hamvoip.org> wrote:
> >>>>>
> >>>>>> I was looking at the pi uptime ups, but it was unclear if it would
> >>>>>>
> >>>>> restart
> >>>>>
> >>>>>> the PI unattended. If it does, thats probably the way I'll go...
> >>>>>>
> >>>>>> On Thu, Jun 28, 2018 at 10:26 AM "Jesse Royall via arm-allstar" <
> >>>>>> arm-allstar at hamvoip.org> wrote:
> >>>>>>
> >>>>>> http://alchemy-power.com/pi-uptime-ups/
> >>>>>>>
> >>>>>>> This is the one I use. Uses 2 18650 batteries. I get about 10 hrs
> of
> >>>>>>> backup. It’s stackable. Has a reset button on it. Monitors the
> >>>>>>>
> >>>>>> voltage
> >>>
> >>>> for
> >>>>>
> >>>>>> a safe power off. And boots back up when power is applied.
> >>>>>>>
> >>>>>>> Sent from my iPhone
> >>>>>>>
> >>>>>>> _______________________________________________
> >>>>>>>
> >>>>>>> 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
> >>>>>>>
> >>>>>> _______________________________________________
> >>>>>>
> >>>>>> 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
> >>>>>>
> >>>>> _______________________________________________
> >>>>>
> >>>>> 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
> >>>>>
> >>>>
> >>>> _______________________________________________
> >>>
> >>> 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
> >>>
> >>> _______________________________________________
> >>
> >> 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
> >>
> >
> > _______________________________________________
> >
> > 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
> _______________________________________________
>
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>
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>

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