[arm-allstar] UPS Suggestions...

Sean McCarthy smccarthy61 at gmail.com
Fri Jul 13 13:40:53 EST 2018 

Oh, 3 different units tested

On Fri, Jul 13, 2018 at 2:40 PM, Sean McCarthy <smccarthy61 at gmail.com>
wrote:

> 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
>> _______________________________________________
>>
>> 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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