I've added a few small things to the Interactive Spectrum Chart: 📍 Ultra-wideband with filterable 500 and 1000 MHz channels ☎️ DECT channels with geographical filtering 🖱️ A "grab" cursor when dragging the map 📡 Spectrum up to 11 GHz 💾 Access it here: spectrum.potatofi.com

No luck getting into this glued Pebble Classic to replace the battery. On my 3D print bed, under a bag of rice, I can get it to 112°C, but that’s still not quite enough to loosen the adhesive. The screen does turn pitch black at that temperature, which is interesting. #Pebble

State of the home network: 🔥 Firewall: Meraki MX75 🥧 DNS: Pi Hole, RPI 3+ and PoE HAT 🎮 Switch: Ubiquiti Switch Lite 8 PoE 🛜 APs: Meraki MR36H x3 🛜 APs: Juniper Mist AP12 x3 I'm switching between Meraki and Juniper Mist APs with a couple of API calls, depending on which I want to use.

Sometimes you're just sitting at your desk in a quiet room, and suddenly your ear starts acting like a barrel just blew up next to you in Half-Life 2.

If you have a MetaGeek Wi-Spy DBx or Ekahau Spectrum Analyzer Model III in a drawer, don't toss it yet. I don't have anything built right now, but I have some ideas for how to re-use them.

Interactive Spectrum Chart update! 🌓 Dark Mode (auto-switching with system) 🚚 Switch between OFDM, HT, and VHT subcarriers 🧑‍✈️ Solid fill for pilot subcarriers ✅ Collapsing menus 🛜 6 GHz PSCs now orange 🧵 See thread for development notes Same place: spectrum.potatofi.com

I'm thinking about letting this go for a full 365 days before fixing it.

You know that it's winter in Helsinki when your computer switches to dark mode at 4:16 PM.

Did some design-by-committee this evening. Here are the results!

Dark Mode isn't for users, it's for the developer so they can work on their application at night.

Shoutout to Chrome's "Relaunch to update" button for ruining countless documentation screenshots.

I regularly get asked, what's Halloween like in Finland? 🇫🇮 Finnish parents don't like Halloween, more work 🎃 A thing at our kids' international school 🎃 Virtually no trick/treat 🎃 Small 1-tbl display of Halloween stuff at the store 🎄 Store dominated by Christmas stuff 🎃 Big growth in the past 5 yrs

It’s tragic that iOS corrects “wifi” to WiFi and not Wi-Fi. So close.

Due to an Azure outage, Hamina is down. Rest assured that our engineering team is refreshing the Azure status page as quickly and often as possible.

This evening, I'm implementing subcarrier drawing for S1G (802.11ah) for my interactive spectrum chart. It looks like my spectral mask guesses for 1 MHz 802.11ah channels weren't quite right!

Same. The single thing I've enjoyed in the iOS/iPadOS/macOS 26 lineup is window management on iPad. Everything else about it is an inconsistent, hard-to-read mess. I'm worried that we are stuck with this, going forward.

Every day, I exchange a bunch of emails with someone to set up a meeting, when they could have just emailed me their question. Some people seem to be allergic to written communication, especially when it is asynchronous. Probably the burnout talking.

macOS 26 observation: People buy bigger screens so UI designers make bigger UIs so people buy bigger screens so UI designers make bigger UIs so people buy bigger screens so UI designers make bigger UIs so people buy bigger screens so UI designers make bigger UIs so people buy bigger screens...

A new-old-stock Nokia 6300 from eBay. I still have mine in storage in the US, but have been planning to pick up another for awhile. I carried it for 5 or 6 years. I do wonder if Elisa (Finnish carrier) offers any 2G service, and if it would be expensive. Next, I’d like to find a NOS Motorola Razr.

No Kings Protest today in front of Oodi in Helsinki at 2 PM! I’ve never been to a protest before, but it’s time. See you there? 🇫🇮🇺🇸 Organized by Democrats Abroad (I’m not a democrat but am happy to assist): www.democratsabroad.org/danafreling/...

We hit 32 nodes on Bitchat at #WLPC!

Neat show. Victims of their own success! 2 hour wait to get in, and then the hall was absolutely jam-packed. I’ll bet that they do this again, but much bigger. I’m already looking forward to it!

Today I’m headed to Finnish RetroCon in Tampere! Retrocon.fi

I guess I need to change my #WLPC talk from “Building the Wi-Fi Lab at Hamina” to “How to melt Raspberry Pi’s”.

Transferring a CD-ROM image over 802.11b at 11 Mbps with a Mist AP12. -69 dBm with 27 dB SNR. FTP throughput is 250-265 Kbps. Encrypted with WEP, and using Juniper Mist VxLAN rules to block access to the rest of my network. Insecure SSID is disabled whenever I’m not using it.

I love that my 14-year-old found the LEGO Game Boy at the store today.

I despise it when iOS apps ask for all of the photos in your library, instead of just letting the iOS photo picker select them one at a time to send to the app. API calls exist for both, and developers always seem to choose the wrong one.

Problem? What problem? #Pebble

I like this: www.crowdsupply.com/centylab/poc...

The couch co-op game of the day was LEGO Voyagers. Totally adorable, fun puzzles, super forgiving, and great little world building. The framerate on Switch seems a tad slow. Hoping @digitalfoundry.bsky.social will do comparisons.

"As a child, I'd think nothing of temporarily cranking up property taxes just to pay for a pet project; now, it makes me think of my own slowly rising property tax bill."

I played with Icon Composer today. I think it would be nice for iOS/iPadOS 26 users who want a home screen shortcut for spectrum.potatofi.com. The problem is that I probably can't pass a .icon file through Safari for iOS/iPadOS to use.

Classic Mac's OS file system innovations (resource forks, metadata) were often lost in transit on the Internet in 1995, and the same is true 30 years later with Infinite Mac. I found a workaround using modern macOS's built-in .zip archives – a brief writeup: blog.persistent.info/2025/09/infi...

Yikes! "The disruption is due to a change in the operating voltage of the inner-city tramway. The voltage was increased from 600 volts to 750 volts on the night of Saturday, 13 September. This damaged some of the older trams’ inverters, which convert direct current into alternating current."

Replaced. The Anker A1384 adds another USB-C port, bumps from 24 to 30W, has a percentage indicator screen, and supports all of the PD voltages. The formfactor isn’t as nice (doesn’t sit on the bottom of my backpack, isn’t as nice to hold), but at €60 it will do the job. Gloss plastic is awful, too.

After 8 years of service, my Anker 20100 Nintendo Switch Edition no longer charges or outputs from the USB-C port. There’s a weird charging/not charging loop, as if it can’t negotiate and output the right voltage. USB-A output still works, but this seems to be the end of the line for it.

“But, It’s not all blueberries and butterflies.” - @troymart.bsky.social This is the best thing I’ve heard today.

Thanks to all of the adults in my life when I was teen who said, "Videogames are bad for you" instead of saying, "Wear earplugs when you go on long streetbike rides." Those videogames really messed me up! But the tinnitus is fine, no big deal.

Not a great day. Relaxing with some vintage computer YouTube. Sudden ad, horror movie. Can’t hit skip fast enough. THANKS FOR NOTHING, YOUTUBE.

I think Europe is getting to me. The more time passes, the more I want an Amiga 600.

If you like Wi-Fi, radio stuff, and spectrum analyzers, give @mrteigen.wi-fi.zip a follow. I don't know anyone who dives into this stuff as much as he does.

Three years ago now, I got to spend some time in a Beech 18. Probably the biggest plane I'll ever be at the controls in.

Wi-Fi Question: What attracted you to the Wi-Fi community on Twitter? What value did it bring to you, personally?

Following the Pebble 2 redesign announcement by @ericmigi.com, there were some questions on Reddit about how older apps will look on the bigger screen. Here's how my app looks with zero effort or forethought. A few things (Status Bar, Action Menu) are automatic. Some need slight changes. Easy fixes.

HSL/HRT (Helsinki Regional Transport) is increasing the tramway voltage from 600 VDC to 750 VDC. The main purpose of the notification I received was to to advise on overnight service interruptions, but I love that they took the time to explain what and why: www.hsl.fi/en/hsl/news/...

macOS 27 won't support Time Machine on Apple AirPort and Time Capsule devices. I get it; these were discontinued in 2018 and had a good run, and we're getting over a year of warning.

My very first Pebble app ("Departures" for Helsinki Regional Transit busses and trams) is "done"! That's always more to do, but it's usable. I'll test it for a few days, and then release it on the @rebble.io App Store.

I grew up on these streets

This was even more unexpected: it works on the Switch Lite with a USB-C to USB-A adapter. Wild!

Supporting USB mice on Switch with Mario Paint was a very nice gesture from Nintendo.