What I learned at OggCamp 2018

I last attended OggCamp in Liverpool in 2015 and had a great time. There wasn’t one in 2016, and in 2017 it was in the wrong part of the UK for the gods of time & space to allow.

I did though make it to OggCamp 2018 in Sheffield, so here’s some of the things I took away:

Sheffield is Super

It’s been a long time since I was last in Sheffield, and an even longer time since I arrived by train on the Penistone line. The rolling stock is still the faithful old Pacer, that I’m sure they were going to replace when I was still in my teenage years…

Anyway, some lovely new buildings in amongst the old, and some nice ‘modern’ uses for re-purposed places too. One of which was where I had coffee and breakfast – Tamper Sellers Wheel on Arundel Street. Absolutely amazing food, coffee and service.

OggCamp

I got the feeling there were fewer attendees than at Liverpool, but I couldn’t be sure. The layout in Sheffield wasn’t ideal, with venues being split by five storeys, so it felt a bit disconnected. However, once the Welcome Talk was underway, there were plenty of familiar faces around and it soon felt like OggCamp again.

I went to a talk on The Things Network, as it’s always good to find out what other groups are doing, and if there are any ideas I can use to help with my own TTN projects on the Isle of Man. It seems the main thing we need to work on here in the island is a use case which builds a community around it, as that looks like the most successful way of involving enough people and getting access to some funds.

The next talk was about delivering images over the mobile web. Not something I’d specifically thought about but quite interesting nonetheless.

  1. You can wind up your JPEG compression without really noticing on small screens.  A nice tool called cjpeg-dssim, which looks at structural similarity, can help with this.
  2. File formats matter. SVGs are a kind of XML, and can even go inline with your HTTP code – BUT beware. If you create them in Adobe products, it seems about 98% of the resulting file size is cruft that you can remove! WebP seems to be the best format in terms of quality vs filesize, but is only supported in Chrome and Android browsers for now.
  3. Size matters. Most mobile browsers download loads of pixels, and then throw most of them away before displaying. This wastes mobile data, slows down load times, as well as making the processor in the mobile device work harder than it has to. Ideally create lots of versions of an image which differ by about 25 kB in size, and then use some responsive scripts to load the correct size image for the current viewport size. Speeds things up a lot.
  4. Lazy loading saves data, as most pages don’t get viewed in their entirety. Loading images just as they scroll up towards the viewport means that if the user doesn’t scroll, no data is wasted (and page loads quicker) but if they do scroll, they still see all the pictures.

The final talk before lunch was about hacking the O2 Joggler. This was great, as the presenter was clearly very passionate about re-using old kit that would otherwise have gone to waste. I’d never really considered hacking as a force for environmental good before. It seems that the Joggler is quite versatile with hacked firmware, and they’re available fairly cheaply at the moment.

Beer with Friends

As much as OggCamp is great (really, you should attend), I received a Twitter message from someone I’d never met in real life but who I’ve swapped messages with for years. They’d noted I was in Sheffield and wondered if I wanted to meet up. A very chilled afternoon of drinking in the sunshine and exploring various drinking venues and beers of Sheffield followed, before riding the train again.

Liverpool Makefest

I took the boat from the Isle of Man to Liverpool for the day, to visit Makefest in Liverpool.

This was a great day out, and I saw loads of good things. The highlights were:

  • Having my portrait drawn from a webcam by a DIY plotter made from DVD drives
  • An impromptu meeting with lots of northern Things Network groups
  • Seeing an RC2014 computer (and then buying one!)
  • Spending too much money on loads of bits and bobs from ABX-Labs store.

Found some nice food and real ale in a pub later in the afternoon, and the sea was flat calm on the way home so it was pretty much a perfect day out!

Leaving Twitter

When I joined Twitter in 2009, it was a place to find interesting people sharing interesting ideas and learning from one another.  You could ask questions on very technical topics, and people would take the time to reply in detailed and thoughtful ways.

Over time, more and more people joined and the conversations grew. Twitter became my default source of news. I could get answers to problems and queries of a far better quality than I ever could with an algorithmic search engine. I was also able to help out other people by replying to their queries too. It was a place of learning, sharing and growing together.

Sadly as with everything in the modern world, capitalism takes over. Nobody sees the value in something unless it makes money, and while I long for the day when we realise as a species that this love of wealth creation doesn’t do us any good in the long run, Twitter decided to jump in with both feet. And so it was that I started seeing ‘promoted’ tweets. I called them adverts.

Businesses rushed into the space. At first as a communications channel with their customers, but it wasn’t long before they too fell into the capitalist trap and started pretend conversations talking about their products and services and employing people to tweet and re-tweet their messages.

Early on in the life of Twitter, you could ‘favourite’ a tweet. A way of bookmarking tweets which you wanted to come back to later.  Maybe they were ones which contained a useful tip, or a link to another article somewhere that you would read later. Twitter killed this by renaming a favourite to a ‘like’ (complete with new childish animations), and users from other social networks where likes were common brought their own bad habits with them. Proper conversation suffered, and the atmosphere changed. Things were now stuck in a  rut. Tweet -> like -> dead-end.

As recent years have passed I’ve witnessed a gradual decline in the quality of conversations. There has also been a real polarisation of opinions (regardless of subject) and many Twitter users seem incapable of independent thought now. They just follow their own tribes in terms of political or social views and vehemently attack anyone who dares to suggest an alternative world view.

The nail in the coffin for me was Twitter’s change to its privacy policy, which meant that they would no longer honour the ‘do not track’ setting in my browser and would begin to track my movements across the internet on other sites outside of Twitter. That’s not the attitude of a company that cares about its customers or values their privacy.

So, I’m out. I don’t think I’ll miss it at all.

Photo credit: REUTERS/Dado Ruvic

SharkRF OpenSpot

I’ve been having a lot of success using my MD380 DMR transceiver together with the Isle of Man’s DMR repeater network. Sadly though, my house isn’t in coverage of the repeaters. This means I can’t use my handheld at home.

The solution to this problem has come in the form of a Radio/IP gateway called the OpenSpot, and manufactured by SharkRF.

This allows my DMR radio to send packets to global DMR networks (Brandmeister, DMR+ etc.) and for incoming packets to be sent to my radio over RF.  Essentially it’s like having my own DMR ‘repeater’ at home so that I can use my handheld radio on all of the global networks as if I was in coverage of a DMR repeater.

Configuration was easy, via an HTTP web interface. Once set up, all the control can be done from the radio. Linking and unlinking can be done by sending group calls to specific talkgroups which means there’s no need to keep using a computer to use the device. All you need is your handheld radio.

I’ve been impressed with the build quality, the support forums, and the constant releases of new firmware with new features. I haven’t tried it yet, but it should be possible to use my OpenSpot to also communicate on the non-DMR D-STAR and System Fusion networks too, even though I only have a DMR radio. You can’t even do that with a full on DMR repeater!

Losing yourself…

About once every year, I like to log in to Ofcom’s website and re-validate my amateur radio licence. I do this so that it becomes a sort of habit, and so that I’ve no risk of going beyond the statutory five year limit.

This year, my login details didn’t work. It turns out that Ofcom have upgraded their online systems and I need to re-register. Provided that I use the same email address, they’ll match up all of my details.

Or so the theory goes. Sure enough, the system found my name and my address without issue, but sadly not my amateur radio licence. Instead, I’m now the holder of an old club callsign which I used to use when running a radio club at a school in England about 16 years ago. My actual licence and callsign is nowhere to be seen.

This matters, and not just for the legal reasons of needing to have a licence to transmit. To radio amateurs, your callsign is your name. It’s your identity. It’s how people recognise you. It matters when it’s gone. That’s why the right to personal identity is recognised in international law through a range of declarations and conventions.

Anyway, I’ve spoken to Ofcom on the phone today. Twice. They’re very polite and helpful people, but they can’t fix it for me. I’m waiting for a call back at some point today.

I don’t like being an unnamed, stateless individual. I want my identity back!