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by jjsanderson
Wed May 16, 2018 9:22 am
Forum: Python
Topic: Crontab Issue with Paho MQTT
Replies: 9
Views: 1055

Re: Crontab Issue with Paho MQTT

Hmm, I've done a lot with Paho and found it completely reliable… but I've not launched scripts at boot, so I don't really have much to offer here. Is it possible you're hitting one of the issues discussed in this other thread: https://www.raspberrypi.org/forums/viewtopic.php?f=32&t=145382 ? In parti...
by jjsanderson
Tue May 30, 2017 2:03 pm
Forum: Python
Topic: Python Communication Between Many Pi's
Replies: 6
Views: 2476

Re: Python Communication Between Many Pi's

Third vote for MQTT. One advantage of going that route is that it's fully cross-platform and language-agnostic: we use it a lot for mixed networks of Pis and Arduino (ESP8266) controllers/sensors. Izzati looks interesting though - thanks for that, kusti8!
by jjsanderson
Tue May 23, 2017 10:15 pm
Forum: Troubleshooting
Topic: python guizero not installing
Replies: 13
Views: 3579

Re: python guizero not installing

Python2 / Python3 issue? Try

Code: Select all

sudo pip3 install guizero
and run your code under python3?
by jjsanderson
Thu Apr 20, 2017 10:28 am
Forum: User groups and events
Topic: Maker Faire UK 2017 (Sat/Sun 1st & 2nd April)
Replies: 1
Views: 2281

Re: Maker Faire UK 2017 (Sat/Sun 1st & 2nd April)

Sorry I missed you there! I've finished up the film of our new installation, The Heart of Maker Faire, https://www.youtube.com/watch?v=Er-b1X5HWGI . It's a display of jars on shelves, each one lit to beat at the heart rate of the person who left it - so visitors left a little of themselves behind. T...
by jjsanderson
Wed Apr 19, 2017 9:17 pm
Forum: Raspbian
Topic: raspbian server issues
Replies: 4
Views: 1386

Re: raspbian server issues

Ouch. Sympathy doesn't make file copies progress any faster, nor resolve gnarly configuration issues, but I'm afraid it's about all I've got to offer. Thanks for the updates, and good luck getting (a.) things fixed, and (b.) sleep.
by jjsanderson
Thu Apr 13, 2017 3:25 pm
Forum: General discussion
Topic: Upgrading the Pi
Replies: 16
Views: 2611

Re: Upgrading the Pi

See this thread: https://www.raspberrypi.org/forums/viewtopic.php?f=66&t=121880 , which covers precisely this topic. It's worth reading the whole thread, as it looks like while it is possible to upgrade to Jessie (and hence to a Pi3), it may not be smooth sailing. Personally, I'd be looking to back ...
by jjsanderson
Tue Feb 14, 2017 2:23 pm
Forum: Camera board
Topic: camera = PiCamera()
Replies: 3
Views: 1012

Re: camera = PiCamera()

You're calling start_preview(), but never stop_preview(), so your preview window is never asked to disappear. And you've no way of falling out of the while loop since the test is always True. You could set a maximum number of photographs, or wire up a second button which, when pressed, exits the loo...
by jjsanderson
Fri Nov 18, 2016 4:41 pm
Forum: General discussion
Topic: Jerky Servo
Replies: 4
Views: 897

Re: Jerky Servo

I have seen some hilariously wayward behaviour from very cheap servos - specifically, a set I bought at a clearly-too-good-to-be-true price from a robot manufacturer, who billed them as 'Awful servos that are clearly too cheap to be of much real use, we just want rid of them' or similar. I find them...
by jjsanderson
Fri Oct 07, 2016 10:14 am
Forum: General discussion
Topic: Raspberry Pi 3 no wifi
Replies: 48
Views: 126001

Re: Raspberry Pi 3 no wifi

Just to note (and bump this thread) that the 'can't find interface' issue remains for me with the latest Raspbian (September 2016 / Pixel). Circumstances: Clean install of Raspbian (or NOOBS) to a Pi3. Wifi interface found and functions correctly. [time passes. Could be a month, could be a few hours...
by jjsanderson
Wed Sep 28, 2016 10:00 am
Forum: Raspbian
Topic: STICKY: PIXEL desktop: now defunct and replaced by Raspbian Stretch
Replies: 193
Views: 127370

Re: Introducing PIXEL desktop: new Raspbian release

I'm absolutely in support of ditching startup messages. You can't read them; they make very little sense to pretty much anyone except forum regulars; as the first thing a new user sees they're absolutely terrifying. The splash screen is (literally) more welcoming and familiar, I'm entirely happy for...
by jjsanderson
Mon Jun 20, 2016 2:35 pm
Forum: Camera board
Topic: Pure Python camera interface
Replies: 462
Views: 163492

Re: Pure Python camera interface

Woohoo! Congratulations on getting this out of the door, Dave. I'm looking forward to playing around with it and bringing my image processing code up-to-date for an installation piece I built for Maker Faire UK. It's been in mothballs for a couple of months, but is about to have another outing up he...
by jjsanderson
Wed Jun 01, 2016 1:28 pm
Forum: Python
Topic: Posting a mouse event from Python
Replies: 10
Views: 1988

Re: Posting a mouse event from Python

It is a glacially slow system (dragging up an old thread, sorry) I found PyAutoGUI became much more manageable when I included the line: pyautogui.PAUSE = 0.0 It looks to me like there's a default of about quarter of a second delay on each event - very obvious when trying to script mouse movement, ...
by jjsanderson
Tue May 31, 2016 10:11 am
Forum: Off topic discussion
Topic: BBC Micro-Bit coming to general sale
Replies: 17
Views: 3366

Re: BBC Micro-Bit coming to general sale

They're still trickling their way out into schools, but yes, it's too early to tell how successful they might prove. Truth be told, this close to the end of the school year, I suspect it'll be well into the next year before we really get a clear picture. There are several challenges, as I see it: I'...
by jjsanderson
Wed Oct 17, 2012 11:49 am
Forum: Automation, sensing and robotics
Topic: Hacking a Bigtrack
Replies: 26
Views: 10028

Re: Hacking a Bigtrack

Hang on - BigTrak has an accessible control panel on the top panel, right?

Why not use the mounted robot arm to program the BigTrak? No vehicle hacking required at all, the arm is a mind-controlling parasite.

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