foss-north speaker line-up

I am extremely pleased to have confirmed the entire speaker line-up for foss north 2017. This will be a really good year!

Trying to put together something like this is really hard – you want the best speakers, but you also want a mix of local and international, various technologies, various viewpoints and much, much more. For 2017 we will have open hardware and open software, KDE and Gnome, web and embedded, tech talks and processes, and so on.

The foss north conference is a great excuse to come visit Gothenburg in the spring. Apparently, Sweden’s wildest city!

foss-gbg on Wednesday

If you happen to be in Gothenburg on Wednesday you are most welcome to visit foss-gbg. It is a free event (you still have to register so that we can arrange some light food) starting at 17.00.

The topics are Yocto Linux on FPGA-based hardware, risk and license management in open source projects and a product release by the local start-up Zifra (an encryptable SD-card).

More information and free tickets are available at the foss-gbg site.


Summary of 2016

So, 2016 has been a great year to me. Interesting in many aspects, but most has turned out to be for the better. I’ve gotten to know a bunch of awesome new people, I spoken about open source, Qt and Linux in Europe and USA, I’ve helped hosting an open source conference in Gothenburg, I’ve learned so much more professionally and as a person, and I’ve really enjoyed myself the whole time.

2016 was the year that…

  • … myself and Jürgen where Qt Champions for our work with the qmlbook. It feels really great getting recognition for this work. I really want to take QML Book further – during 2016 both myself and Jürgen have been too busy to do a good job improving and extending the text.
  • … I had to opportunity to visit the Americas (Oregon and California) for the first time in my life. Felt really nice having been on another continent. Now it is only Africa and Australia left on the list :-)

  • … I picked up running and has run every week throughout the year, averaging almost 10km per week. This is the first year since we built out house and had kids (so 11 or 12 years) that I’ve maintained a training regime over a full year.
  • foss-gbg went from a small user group of 15-30 people meeting every month to something much larger. On May 26 the first foss-north took place. This is something some friends of mine and myself have discussed for years and when we finally dared to try it was a great success. We filled the venue with 110 guests and ten speakers and had a great day in the sunshine. In the events after foss-north, the local group, foss-gbg has attracted 40-60 people per meeting, so double the crowd.

  • Pelagicore, the start-up I joined in 2010 when we were only 6 employees, was acquired by Luxoft. We had grown to 50+ employees in the mean time and put Qt, Linux and open source on the automotive map. It has been a great journey and I feel that we being a part of something bigger lets us reach even further, so I’m really excited about this.

2017 will be the year that…

  • … I make more time for writing – on qmlbook, this blog and more.
  • … I improve my running and increase my average distance per run as well as distance per week.
  • foss-north will take place again. This time with double the audience and dual tracks for parts of the day. I will share more information as it develops. This time, the date to aim for is April 26. In the mean time, foss-gbg will have fewer, but larger, meetings.
  • … Qt, Linux and open source becomes the natural choice in automotive. I will do my best to help this turn out true!

Even as 2016 has been really good, I hope that 2017 will be even greater. I’m really looking forward to learning!

Vacation 2015

IMG_20150703_172538So, vacation has finally arrived in 2015. To the despair of some, and joy of others, the Swedish standard vacation is 3-5 weeks over the summer. I’ll be having five weeks of this year.

So, what do you do with five weeks? Generally, I start out ambitious and end up in reality after 3-4 weeks and then scramble to get something done. Here is my list for the summer 2015:

  • Hang out with the kids and wife and do fun stuff.
  • Do some work around the house (a shed for our bikes and some general painting are on the wish list).
  • Get the calendar for foss-gbg into place. It does look as if we will have an awesome autumn.
  • Work on a whole bunch of little Yocto projects that I’ve been planning for a while (meta-kf5 being one of the high priority ones, playing with various targets such as the Raspberry Pi 2, Beagle Bone Black and more another).
  • Getting my 3D printer back into shape and do something fun with it (if it rains a lot)

That summarizes my ambition pretty much – but first things first – lets spend a few days hanging out with the kids before they grow tired of me and think that I’m old and boring :-)

Saving code

As you probably know by now, Gitorious is shutting down. A lot of history sits on that site, and much of the code is no longer maintained. Browsing around, I ran into the maemo-tools that has not been touched since 2013. There are still some useful stuff there, so I decided to save it. All tool repositories has been cloned to the maemo-tools-old organization on github.

As I’m only a happy user, I would love to invite the original maintainers, or other interested developers to come work on it, so if you want an invite to the organization so that you can maintain the code, just drop me a mail at e8johan, gmail, com.

Raspberry Pi Night

downloadA couple of nights ago, Daniel Stenberg visited the Pelagicore offices in Gothenburg for the Raspberry Pi Night. We had 28 signed up guests and hacked, talked and played for a night.

I was personally surprised about the turn-up – and the number of projects showing up. A couple of guys even came with a lab power supply and their own embedded computer running a SNES emulator. Cool stuff! Some figures around this. We filled the event (28 tickets) in 4-5 days. We got 40+ people on the foss-gbg mailing list in two weeks.


I’d like to thank everyone who showed up. Great to see a large crowd! I’d also like to thank Daniel for coming, Pelagicore for hosting and supplying food, a location and competition prizes, and to all my colleagues who helped me in the preparations. As this really took of, I’m already planning for our next event. If you want to brain storm about topics, feel free to drop me a mail (e8johan, gmail). I’m already thinking 3D printing, quad copters, node.js in embedded, Wayland, etc.

Raspberry Pi Night in Gothenburg

The event described below is in Sweden, in Swedish, so simply skip ahead if the rest sounds like gibberish.

Embedded Linux, Automotive, Real-time? Daniel Stenberg, känd från curl, ssh2 and c-ares kommer till stan!

Vi samlas, snackar och hackar inbyggd Linux några timmar. Dra med dig din raspberry pi, beagleboard, pandaboard, androidtelefon eller liknande och vi bygger och installerar egen-byggda uboots, Linux-kernels och rootfilsystem på dem! Har du inte ett eget inbyggt “device” att jobba med kan du säkert låna ett roligt kort när du kommer eller hjälpa någon annan. Dela med dig av ditt projekt och få hjälp, eller häng på någons annans projekt och hjälp till!

Från klockan 16 till klockan 20, i Pelagicores lokaler på Ekelundsgatan 4.

Vi kommer också att krydda kvällen med ett föredrag av Daniel Stenberg med arbetstiteln “real time challenges with Linux” samt en tävling på temat “inbyggd open source”.

Allt händer under Raspberry Pi Night hos Pelagicore, anmälan på . Begränsat antal platser!

The Cuecumber Cam

This spring, I invested in a greenhouse. As soon as the green stuff was growing, the little nerd in me saw some room for improvement. I got a Raspberry Pi model A, a solar charger case from cottonpicker’s and a cheap webcam. As it turns out, the batteries from the solar case only provide an around 4.8V, so the webcam sort of killed the system over night, and then the charging plus booting never actually got the system reliably running during each day. The results of 3 weeks in the field is the following little timelapse showing cuecumbers…

timelapseSo, next attempt will be to set this up with a Raspberry Pi camera module. Lets see if that gives a more stable system…

tt-rss in debian stable

I run a little server of my own with debian stable. Now, I wanted Tiny Tiny RSS, as Google just showed why relying on the cloud isn’t a good thing.

As tt-rss only lives in unstable, I decided to backport it. In order to do so, I had to backport the following packages (in this order):

  • libarchive-zip-perl, which is a build dependecy to rhino
  • javahelper, which is a build dependency to shrinksafe
  • rhino (and thus also librhino-java), which are build dependencies to shrinksafe
  • shrinksafe, which is a build dependecy to dojo
  • libjs-dojo-core (and thus also libjs-dojo-dijit), which both are dependencies to tt-rss
  • prototypejs, which is a dependency of tt-rss
  • tt-rss

I hope I did not mix up what is a build dependencies and install dependencies, but it does not really matter. You will have to apt-get build-dep foo && apt-get -b source foo for each of these. Then dpkg -i foo the resulting debs. You might also have to install some prepackaged stuff, as dpkg doesn’t resolve the dependencies automatically.

Having tt-rss up and running, I migrated my subscriptions from google reader, installed the Android app and waited. The first time, tt-rss gets the whole feed, so you’ll have to wait a while (a couple of hours in my case) and then mark all as read, then everything works nicely.

There are few other cloud services that I depend on as much as a good RSS reader (I tend to read from many different devices, depending on where I am). But it is unlikely that I’ll every again will trust a cloud service as a critical part of my day-to-day workflow. Just look at what happened to tinkercad (which I did not rely on).