On Wednesday, 23 August 2017 19:42:02 BST Terry Coles wrote:
> On Wednesday, 23 August 2017 18:10:45 BST Terry Coles wrote:
> > I then executed 'sudo ntpd -q' after logging into buttspi. I've put the
> > screenshot of the results at:
> >
> > http://hadrian-way.co.uk/M
On Wednesday, 23 August 2017 18:10:45 BST Terry Coles wrote:
> I then executed 'sudo ntpd -q' after logging into buttspi. I've put the
> screenshot of the results at:
>
> http://hadrian-way.co.uk/Misc/Butts_Pi_Screenshot.png
>
> As you can see, the sync is quicker, but it s
On Wednesday, 23 August 2017 18:10:45 BST Terry Coles wrote:
> I then executed 'sudo ntpd -q' after logging into sumppi. I've
On Wednesday, 23 August 2017 15:44:18 BST Terry Coles wrote:
> I've done a bit more research and discovered that it's not systemd that
> allows services to start in parallel, but upstart. Raspbian Stretch does
> use upstart, so I'm thinking that putting a delay in the ntp start
On Wednesday, 23 August 2017 14:30:12 BST Terry Coles wrote:
> Raspberry Pi Stretch is running systemd but the ntpd service file is
> installed in /etc/init.d. From this, I'm assuming that if I made a copy of
> the ntp.service file and put a delay into it, that would work, but will
>
chniques
allow services to start in parallel, but I'm not sure if this applies to
services that would have been started by init in days of yore.
What do you think?
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That's pretty much what we've been doing.
Thanks for your help.
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On Monday, 21 August 2017 16:32:12 BST Terry Coles wrote:
> For the Client we've added:
>
> server 192.168.0.2
>
> to the server pool.
>
> For the Server we've added:
>
> restrict 192.168.0.0 mask 255.255.255.0
>
> and:
>
>broadcast 192.
On Monday, 21 August 2017 17:30:18 BST Terry Coles wrote:
> > Add the following two lines to your servers config.
> >
> > server 127.127.1.0
> > fudge 127.127.1.0 stratum 12
>
> Hmmm. I tried that and still nogo. Should that have been 127.0.0.1? (I
&g
)
> This tells the server to use the system clock as a reference at stratum
> 12. System clock on a Pi is a poor choice since the Pi doesn't have an
> RTC so will get clobbered on every power cycle but it should get you
> going.
I forgot to mention; I have included a RASClock RTC
examined the output of ntpq -pn, but it doesn't reveal anything to me that
seems
untoward, except that the both the Master and Remote Pis list 192.168.0.2 as
the remote.
See:
http://hadrian-way.co.uk/Misc/Pi_NTP_Screenshot.png
Any ideas?
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h script as you allow it.
> This email's also in part a test because lug.org.uk disappeared from DNS
> for a while due to Nominet issues with validating the registrant, so if
> anyone had bounces, that's why and it should be OK now.
It arrived :-)
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F1 and
> that's the blank screen and flashing cursor.
I failed to mention that I tried all those too, plus the other F keys. ;-(
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On Sunday, 30 July 2017 16:10:50 BST Terry Coles wrote:
> There is a History log, but it's huge and has line lengths up to 7000 odd
> chars. I'm not sure that I would notice if there was something amiss.
Ooops. I should have said 'line lengths up to 70,000 odd
backwards instead. If that works then one of "d", "l", or "w"
> after the "b" might show useful information.
I'll give it a try the next time it happens, but it doesn't seem to be reading
the keyboard at all by then. I tried Alt Ctrl F1 to get a virtual cons
Hi,
The next meeting is just one week away at the Broadway, Bournemouth at 20:00
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Paul,
Are you going? Your turn to drive I think.
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only 'checked-out' a file if you intended to change it.
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Reporting
are
the Manager and staff of the WMT and possibly some of the other volunteers.
Any thoughts?
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nts fully since it arrived on the back of a Google 'Summer of Code'
some years ago.
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Hi,
The next meeting is just one week away at the Broadway, Bournemouth at 20:00
on Tuesday evening, 2017-07-04. See:
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Paul,
Are you going? My turn to drive. (It really is this time.)
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s time is an installable version of Raspbian for the PC. I
installed it on VMWare, but I've not been able to get the machine to run with
a resolution of more than 640x480, but it does run.
Thonny looks nice.
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a problem with and that's mainly due to my
lack of knowledge of the terminology used in the CS world.)
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On Thursday, 22 June 2017 12:17:56 BST Terry Coles wrote:
> I'm not sure that I understand how this works. Taking the Remote Pi; it
> reads the water level and writes the value to a variable. Fine so far, but
> how can the Master Pi, then read that variable? That variable is a
&
the Ethernet link.
However, my knowledge of database functionality is very much at the systems
level, so before I embark on a programme of research, does anyone have any
comments on this approach? If there is a better way, I'd like to hear about
it.
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s. I see that. Interestingly, I could see nothing about local vars,
although his examples seem to use the same convention as globals.
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to learn
the ropes. On that note, there is one downside - the documentation seems to
be extremely comprehensive, but a bit daunting as it's a 294 pp PDF ;-)
Anyway, I thought I'd convey my first impressions in case anyone else hadn't
come across this tool.
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exists, or ./key-dec, or both, and adjust your PWM duty. Those two
> files can be created and deleted outside of IDLE by some other means.
> Either you with touch(1) and rm(1) in a shell, or a shell script that
> creates a file for a second, then deletes it, etc., to give a test
> scrip
ther look.
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ng? This code would appear to work for others (I see no
comments saying it doesn't anyway), so why doesn't it work for me?
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Hi,
The next meeting is just one week away at the Broadway, Bournemouth on Tuesday
evening at 20:00; 2017-06-06. See:
http://dorset.lug.org.uk/wiki/doku.php?id=meetings:pub#the_broadway
Paul,
Are you going? My turn to drive.
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On Sunday, 28 May 2017 11:26:47 BST Terry Coles wrote:
> rather than turbines have gained some prominence. There was once a water
> mill on the River Allen (in Mill Street would you believe) although that
That should be Mill Lane of course.
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On Sunday, 28 May 2017 11:24:21 BST you wrote:
> Mustn't forget the need to have it hidden from the visitors as it is not
> a feature of the town. Horizontal paddle wheel under a bridge perhaps?
Crossed over with my last post!
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r
optical device such as the one Peter W identified the other day. I personally
like the
optical route, but we'd have more problems with the ingress of dirt with that,
so the hall
effect sensor may prevail.
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ame along would block
it!
That's not to mention that these things are designed to run dry on the
outside, run vertically and have a flow rate up to 30 litres / min at a
pressure of 1.75 MPa through that tiny pipe.
(1.75 MPa is 250 psi by the way :-) )
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access to a scope? You will be working in the dark if you don't
know what the O/P looks like.
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out. This
would explain why emailing Peter is so hit and miss; I've had issues before,
but emailed him successfully only yesterday. I also get similar symptoms when
I email Tim. Presumably the mailservers at their ISPs are more stringent in
applying blacklists than everyone else.
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On Thursday, 11 May 2017 11:04:40 BST PeterMerchant via dorset wrote:
> On 30/04/17 13:06, PeterMerchant via dorset wrote:
> > On 19/04/17 10:16, Terry Coles wrote:
> >> My copy of Kubuntu 16.10 (and earlier versions) has always had an
> >> issue with the graphical up
sed he would about a month ago.
To be fair, anyone who has bought the latest copy of MagPi can probably guess
why. Preparing for this month's freebie must have taken up quite a lot of his
time.
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Meet
ackground in
electronics and an IT student. We are going to take this slowly.
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are right and I expect that we will do something like that. I
would like to
know what the inputs and outputs of the system are going to be before we try to
simulate
it, that's all :-)
> Playing around in the water with sensor design could be in parallel, if
> only there was enough volunte
e. We need to get the system design nailed down first and we can't
do that until we've built and tested some sensors.
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to know the level of water and the
flow at various points around the system.
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ter
periods of heavy rainfall. In the end, the monitoring and control is more
about that scenario than the present one.
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l the flow
of water in and out of the butts.
> Also, I wrote my last e-mail before I had looked at the Wimbourne Model
> Village web site. I imagined it would be indoors and a lot smaller than
> it is!
Yes. The Model Minster is too tall for me to work on the Quarter Jack without
a
On Monday, 1 May 2017 12:26:09 BST Terry Coles wrote:
> Has anyone ever done anything like this? Ideally, for level, an ultrasonic
> sensor with a good level of water resistance would be ideal (it won't be
> immersed, but it will be exposed to rain, mist etc). The capacitive sensor
&
Share' icon in the right-hand side.
I've been using this tool for years and never noticed that ;-)
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the River Allen within its
boundaries.
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Reporting bug
ombat flooding at present.
> For extra complexity, get the water level of the real rivers from
> wherever the above web site gets its data and adjust the levels of the
> model rivers accordingly...
Now you're pulling my leg :-)
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Hi,
The next meeting is just one week away at the Broadway, Bournemouth on Tuesday
evening at 20:00; 2017-05-2. See:
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Paul,
Are you going? My turn to drive.
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h case you can uninstall it to be safer), you can remove
> that ppa ( https://askubuntu.com/questions/307/how-can-ppas-be-removed )
> and upgrade just fine. In fact, usually the GUI updater disables PPAs
> anyway, so you'll just be doing that step yourself manually.
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or repository creation and user configuration
details.
E: Failed to fetch http://ppa.launchpad.net/kokoto-java/omgubuntu-stuff/
ubuntu/dists/yakkety/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old o
I've searched the Kubuntu Forums and found nothing. Has anyone else seen this?
What
does it mean?
I'm loathe to go for a full upgrade while I'm getting this message.
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On Tuesday, 11 April 2017 13:23:36 BST Patrick Wigmore wrote:
> On Tuesday, 11 April 2017, at 12:16:44 BST, Terry Coles wrote:
> > Thanks. Now I can focus on the overheating. We were trying to
> > avoid any holes in the case for ventilation.
>
> I don't want to jinx it, b
On Tuesday, 11 April 2017 13:00:29 BST Ralph Corderoy wrote:
> Do you know what's generating the heat? Infra-red thermometer or
> camera? Can anything be added that would conduct the heat from those to
> the case or the internal heatsink?
At this stage, I'm not completely certain that heat is
On Tuesday, 11 April 2017 11:40:05 BST Ralph Corderoy wrote:
> They take buffers and cache out of the equation. 785612 / 16204 = 48 so
> you can withstand growth at that rate for quite a few multiples of your
> monitoring period, if it's linear.
Thanks. Now I can focus on the overheating. We
keep an eye on it for the next few weeks. If they notice any problems, then
all they will have to do is power cycle it.
If it does become a problem, I'll look again at adding the reboot routine;
maybe not every night, but once a week. (I once had a router that did that.)
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/dev/urandom.
3. /dev/gpiomem.
4. anon_inode:[eventpoll11]
That's it. Does that mean that my instances of /dev/null are killed when the
function exits? (I reset the clock to ensure that the functions that use that
feature would be run. (They are prevented from running outside Opening
Hours)). Ea
I can't make that do anything:
terry@OptiPlex:~$ ls -l /proc/$pid/fd
Whatever, I'm going to run the program again overnight tonight using screen and
dstat
and see what I get.
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On Sunday, 2 April 2017 15:49:54 BST Terry Coles wrote:
> That's a bit of a non-flyer too, because dstat doesn't appear to be
> available in the Raspbian repositories. Also, the software is running in
> the shell at boot up, so it would be difficult to view two things running.
> (Wou
On Sunday, 2 April 2017 14:13:02 BST Terry Coles wrote:
> > You could leave your program running in tandem with `dstat -cdngym
> > $((60*30))' that produces a line every half an hour and see if anything
> > obviously degrades over time.
>
> That wouldn't be very c
l try it here at home with a copy of the program, but I probably won't be
able to leave it running for all that long.
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references to this on the web.
(I suppose the fact that no-one seems to have problems with this is a pointer
to a non-problem.)
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Hi,
The next meeting is just one week away at the Broadway, Bournemouth on Tuesday
evening at 20:00; 2017-04-04. See:
http://dorset.lug.org.uk/wiki/doku.php?id=meetings:pub#the_broadway
Paul,
Are you going?
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:-)
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However, I will be providing a User Manual, so the information will go in
there.
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It's a fair cop. I think I did try it, but then got distracted by debouncing
circuits, etc and forgot to respond.
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On Sunday, 26 March 2017 13:54:10 BST Terry Coles wrote:
> Which worked, so I haven't bothered to grab the shell output when it doesn't
> work.
One final question; related but not really part of this thread.
I've chosen to auto run the script using this technique:
http://www.raspb
instead
of idling as it
does in IDLE (excuse the pun). Is this expected behaviour? If so, is there a
way round it?
Do I need to run an endless loop to keep the script alive?
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ctory which will ultimately contain the contents of the stick remains in
the /media/pi directory, but there is nothing there.
I have now mounted the stick in the pi directory and my code is working again.
All I need to do now is get it to launch on bootup and make the filesystem
read-only.
--
to
fstab and mounting it somewhere in the pi user's home directory, but before I
do that, I'd like to know what's going on.
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his might occur and he is comfortable that the staff should be able to
live with it.
Annoying though.
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leased. any bounces will be
long gone, but more to the point, the cross-talk should be significantly lower
and hopefully insufficient to pass the pin threshold voltage.
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gt; software above handle UTC and localtime. Here, I pretend to be in Paris
> so there's a winter difference to show.
I'll check before I deploy. I don't remember having to do anything to
apscheduler to get the time right when I first used it back in August/Sept, so
I suspect that it just
. I don't see why it shouldn't.
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elping.
Otherwise the software is working fine; I had it running all day in my workroom
yesterday with chimes every hour and quarter, solenoids clacking every
quarter, change rings ringing and organ music going full tilt. My family will
be glad to see the back of it :-)
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e list, the attachment shows
a solution that uses positive logic and pull-downs instead of pull-ups
(because the current design is wired that way).
It doesn't include the diodes, yet.
I'm happy for you to respond to the list.
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On Thursday, 16 March 2017 09:41:41 GMT Ralph Corderoy wrote:
> As distinct from them being the "0" that you were expecting to be
> filtered out because you asked for "rising" edges?
Yes. Exactly.
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n I have a bit
more of an understanding of what is going on.
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s. This
was repeatable.
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/Minster_Functions/changerings3.py'. It
> wouldn't like 2.7 as the script to run.
No. It did work.
> sudo strace -tt -o strace.out -f \
> -e trace=process -e trace=file -e trace=desc \
> python2.7 test-callback.py
See http://www.hadrian-way.co.uk/Misc/strace.out
each time the file is imported?
So I rewrote the last line of the script as:
if __name__ == '__main__':
add_switch_events()
but the code didn't do anything!
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\
> -e trace=process -e trace=file -e trace=desc \changerings3.py
strace: Can't stat 'changerings3.py': No such file or directory
I'm not sure why it can't find the script; I used tab completion to get the
name right.
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there against the spring and observe what happens? Does the callback
> run once with one line printed? Once it's all finished, let the switch
> spring back to off; does it call the callback again?
Se my response to Patrick.
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_detect() statements.
The result of this test implies that the program is reacting to a GPIO.FALLING
event, but there aren't any programmed. In any case, why does this event only
get detected when the two lines aren't commented?
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to change_rings_stop() just after the announcement.)
(Please ignore the fact that I am now using aplay instead of mpg321. I
couldn't get the message to play at all for some reason and when I did, by
using aplay, two came along.)
Has anyone any ideas what is going on here?
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so have
a terrific long-term memory and a totally atrocious short-term one.
Finally, I am now definitely in the old dog stage of life :-)
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ou went and read. :-)
> https://docs.python.org/2/tutorial/introduction.html#lists
That gives the error:
TypeError: cannot concatenate 'str' and 'list' objects
I am trying to join 'mpg321' to the list with no other parameters for the
moment.
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Terry Coles
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Ne
imple string concatenation.
So is there another way to create my space separated list that works, or is my
subprocess.Popen() wrong?
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hon before I set out to write the code would be a major
task in itself. Then I'd probably learn the wrong bits. I have followed some
tutorials online, but none of them got down to this stuff.
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Meet
', *.mp3])
(eg no quotes around the *.mp3), I get a syntax error on the asterisk.
Can this be escaped somehow? Or is there something else that I've missed?
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On Friday, 3 March 2017 14:03:27 GMT Terry Coles wrote:
> On Friday, 3 March 2017 14:00:43 GMT Ralph Corderoy wrote:
> > Where do you get your mpg321 program from? A package in the
> > distribution? If so, which package, which distribution? Or somewhere
> > else?
>
>
th appear to behave the same.
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On Friday, 3 March 2017 13:40:07 GMT Terry Coles wrote:
> On the principle that I don't need the inner while loop (around
> mp3_player.poll() ) as you mentioned in an earlier response, I think that
> this would work, but someone would have to go over and start the player
> again e
n has
different themes on different days, so it would be hymns one day and organ
music another, and so on.
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erminated) or only once?
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On Friday, 3 March 2017 11:31:44 GMT Ralph Corderoy wrote:
> Correct. So `if r not in (0, -15):' looks apt.
It does to me too. Thanks.
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if we are playing the
Playlists in the MP3 Player.
I suppose, having a timeout wouldn't gain us much in this instance, because we
would still have to wait.
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ntion when you wrote those lines:
r = bell_player.wait():
if r:
print 'bell_player: mpg321 failed: %#x\n' % r
bell_player = None
It seems to me that if the mpg321 process exits with -15, that is no more a
failure than if it exits with 0, because terminating the pro
On Thursday, 2 March 2017 13:34:19 GMT Terry Coles wrote:
> I think that I should be testing for not r in the if statement (because it
> works) and adding a timeout. What would be a reasonable timeout in this
> case? If I've understood the documentation correctly, it doesn't really
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