emv @ed_packet@a2mi.social

testing some hashtags to see how they run here

#openwebrx
#websdr
#kiwisdr
#sdr
#hamradio

I think there must be a radio-focused Mastodon somewhere.

2 meters is not particularly active around here, except for Sunday nights when the W8UM and N8DUY weekly nets run. I'll keep this rig configured and running until then.

A bit of hacking, and OpenWebRX is running on my Jetson Nano. Not a complete setup yet, and my antenna is awful, but it can pick up some strong signals on the 2 meter band.

Next to see if I have enough converters to hook up a better antenna (pretty much any antenna would be better).

For reasons I don't completely understand, one of my home computers has an address that's unfiltered on the public internet, and it's by no means ready for that kind of public access.

I blame the UVerse router it's behind, I guess.

The diagnosis is "trip ID mismatches in GTFS"

Response from transit agency: "looks like its working from here"

grr

Trying to poke the bear ( e.g. the local transit system, and a third-party app that consumes data from it ) to figure out why there's no real time data at the bus stop to tell me if the bus is on time or late or whatever.

In the past this has been a monumental task, because transit agencies are not known for their deftness in dealing with IT issues. (Diesel engines, sure, but not internet technology.)

This bus tracking system once famously was down because their ISP had been evicted.

Yee Siang Dumplings for dinner, yum.

https://vielmetti.typepad.com/logbook/2019/12/logbook-s3-sql-select-in-minio-object-storage.html

wrote a bit about tools to work on CSV files, including one new-to-me command line tool called 'q' which embeds SQLite and thus gives you a reasonably complete SQL from the command line.

https://vielmetti.typepad.com/logbook/2019/11/logbook-performance-of-distributed-systems-vs-command-line-tools-1.html

Big data is anything too big to fit into Excel. Some command line tools for cutting data down to size, motivated by the performance you can realize with old tooling on modern hardware.

https://vielmetti.typepad.com/annarbor/2019/11/daily-coffee-not-a-newsletter-not-a-mailing-list.html

featuring
The Dead Schembechlers, "Bomb Ann Arbor Now"

not running a mailing list or a newsletter

steel mill downtime

and my favorite, simulating the effects of the ionosphere on far-away shortwave radio stations

logbook of the day at

https://vielmetti.typepad.com/logbook/2019/11/logbook-robustness-gray-failure-and-emergent-misbehavior-in-complex-systems.html

I really love reading papers about complex systems and how they fail. The favorite phrase from today is "gray failure", where one report is that the system is up and working fine, whereas another simultaneous report is that it's down hard.

https://vielmetti.typepad.com/annarbor/2019/11/reflections-on-a-week-of-blogging-org-domain-control-buy-nothing-day.html

reflecting on a week of daily writing, and why I don't do an email newsletter

observations on the $1.1 billion (!) transaction for the control of the .ORG domain registry

buy nothing day

#logbook

https://vielmetti.typepad.com/logbook/2019/11/logbook-reuters-on-new-amazon-aws-arm-chips-owning-your-whole-stack-bugs-and-all.html

Reuters says that Amazon has a next generation Arm chip on its way with 32 #Neoverse cores. We should hear more at Reinvent.

18 year old Cyrus SASL off-by-one bug emerges as a target for a denial of service attack. A reminder that you own your stack, bugs and all.

Some nifty debugging of a Pi 4 HDMI + wifi problem using a HackRF SDR and a near field probe.

My kale + sweet corn recipe from tonight, pretty good. Of course there was too much food and this was just one side dish.

https://emv-commonplace.netlify.com/recipes/kale/