sunnuntai 23. kesäkuuta 2019

No batteries, no shower

No batteries, no shower.

One of the not so good purchases ... an electrically operated shower controller. It may run out of power during holidays, in which case one can't take a shower, and the large batteries aren't available in all stores. It also takes several seconds to turn the shower up or down. And the battery holder design turns out to be leaky.

The only good feature of this design is that it does automatically cut off after five minutes, so there's protection against passing-out-in-shower-and-causing-flood. Also, the shower doesn't send data to anyone for better targeting of advertisements. As far as I know.

Photos and text (c) 2019 by Jari Arkko. All rights reserved.

keskiviikko 3. huhtikuuta 2019

Automated driving... very safe

LinkedIn occasionally sends advertisements for jobs, and today's advertisement caught my attention: someone is looking for software engineers to work on automated driving. The interest part: only 1 year of experience required.

Hopefully the automated driving systems will be built also with some more experienced software engineers...

keskiviikko 30. tammikuuta 2019


This week we are in the QUIC interop in Tokyo, working on the new transport protocol that promises to speed up your connections. Or it may already be doing so :-) And since this is the IETF, running code feels more important than just the specs. Marcus Ihlar and I from Ericsson brought our new latency monitoring tool to the the interop. It performs passive, in-network monitoring of connections or sets of connections, without having to peek into the traffic content itself. It supports TCP, QUIC with the Spin bit, COAP, and few other types of traffic.

The software is open source and available here.

Some more thoughts about why QUIC is important can also be found here.

39,000 ft above Siberia

39,000 ft above Siberia seems like a good place to work on latency measurement tech.

Photos (c) 2019 by Jari Arkko. All rights reserved.

Internet of nasty things?

Nice to find updates like this from my helpful health gadget assistant...

(Besides the style, I think this was also incorrect. I've been making real progress in weight reduction in the last two months, slight bump in the new year's period due to travel... but it got rectified soon. And there are always some fluctuations.)

Photo (c) 2019 by Jari Arkko. All rights reserved.