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ruffsl

@ruffsl@programming.dev

I’m a robotics researcher. My interests include cybersecurity, repeatable & reproducible research, as well as open source robotics and rust programing.

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ruffsl,
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You could get a fiber optic display/HDMI cable, a fiber optic USB cable, and the USB hub, then just move the desktop tower into another room and run the cables through the walls or ceilings to your display setup. Might only be $100 or so cheaper than then a used business thin client, but at least you could still do something 4K 120Hz HDR 12bit over some distance without compromise. E.g:

Mini Monitor Recommendations

I’m looking for a small 7” or 8” computer monitor to keep on my desk to display Discord and other things without taking up real estate on my main monitor. Ideally something cheap and therefore not a touchscreen. There’s tons of options online but I’d like to get some recommendations from people who have a similar...

ruffsl,
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If you already have a similarly sized tablet, you could just buy a dummy HDMI plug, a few dollars, to add a second virtual desktop and then simply cast that screen to the mobile device.

There are pretty nice Android tablets now with 2.5k 120 hz HDR OLD screens. You can just connect it directly to the computer via USB, enable USB network tethering, then use something like the Moonlight client app with Sunshine screen casting server. With the wired connection, and a high bit rate such as 150 Mbps, you can get single digit millisecond latency and hardly tell the difference from an native HDMI display.

Tablets like those might be on the high end, but at least you’d have nice secondary display that’s a bit more multifunctional. Or just go with a cheaper LCD based tablet or old iPad, if color accuracy, refresh rate, or resolution isn’t a priority.

ruffsl,
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Looks like Moonlight does have their app up on the Apple store or iOS, and Sunlight has binaries for most operating systems. Personally, instead of Sunlight’s server, I still use Nvidia’s GeForce Experience software to stream games, as it takes less effort to configure. Of course, Nvidia may not be applicable if you’re using integrated or AMD graphics instead.

Although, with Nvidia recently deprecating support for it’s shield device, Sunlight provides support for the same protocol that Moonlight was originally developed against, but it’s also open source. I’ve not used multi monitor streaming with GeForce Experience, something Sunlight would be much more flexible in configuring.

As for connectivity, I’m unsure if iOS supports the same USB network feature that Android has. I’d imagine at least the iPhone would, as that’s a core feature/option for mobile hotspot connectivity, but maybe that’s nixed from iPad iOS? Alternatively you could get yourself a USB C hub or dock with an ethernet adapter and pass through power delivery, so you can connect your iPad with a wired network and charge simultaneously.

Or you could just use Wi-Fi, but with wireless networks dropping and retrying packets, that’ll impact latency or bitrate quality when casting displays. Although for something mostly static like discord windows, that’s probably less of an issue. Windows 11, and maybe 10, also have a hotspot mode, where you could share your wired network via your PCs wireless radio via and ad hoc Wi-Fi SSID. That could reduce latency and improve signal reception, but you’d have to start the hotspot setting every session or whenever the device disconnects from windows’ hotspot for more than 15 minutes or something.

You could try other remote display streaming software as well, like Parsec. However they have a online account login requirement with the freemium model, so I prefer the open source client Moonlight instead. However parsecs a lot easier too use when streaming from outside your home, or when remotely single screen co-oping with friends, without having to configure firewalls or domain names.

How to use phone microphone with Bluetooth FM transmitter?

I have a car Bluetooth FM transmitter that connects to my Android phone. The problem is that the transmitter’s microphone is very bad and people can hardly hear me when I make calls or use Google Assistant. I want to use my phone’s microphone instead of the transmitter’s microphone, but still use the transmitter’s...

ruffsl,
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For the call setting under Bluetooth audio devices, I really wish they would break out or separate the settings for using the audio device as a source or sink for call audio. Sort of like how you can disable HSP/HSF Bluetooth profiles for audio devices in Linux or Windows.

ruffsl,
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A while back, I tried looking into what it would take to modify Android to disable Bluetooth microphones for wireless headsets, allowing for call audio to be streamed via regular AAC or aptX, and for the call microphone to be captured from the phones internal mic. This would prevent the bit rate for call audio in microphone being effectively halved when using the ancient HFP/HSP Bluetooth codecs, instead allowing for the same call quality as when using a wired headset. This would help when multitasking with different audio sources, such as listening to music while hanging out on discord, without the music being distorted from the lower bit rate of HFP/HSP. This would also benefit regular VoLTE, as the regular call audio quality already exceeds that of legacy Bluetooth headset profiles.

Although, I didn’t manage to tease apart the mechanics of the audio policy configuration files used by the source Android project, given the sparse documentation and vague commit history.

I’d certainly be fine with the awkwardness of holding up and speaking to my phone as if it was in speaker mode, but listening to the call over wireless headphones, in order to improve or double the audio quality. Always wondered what these audio policies fall back to when a Bluetooth device doesn’t have a headset profile, but it’s almost impossible to find high quality consumer grade Bluetooth headphones without a microphone nowadays.

ruffsl,
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Thanks, fixed!

ruffsl,
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Has Bryan done any more recent recorded talks?

Walking Desk Is More Annoying Than A Standing Desk (hackaday.com)

I feel like there was a missed opportunity to use some of the spare computing power on the desk to add some helpful navigational autonomy. Like using a backward facing web camera for lane assist, obstacle avoidance, route following, etc. Could leverage something open source like Autoware.org to get most of the way there....

ruffsl,
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That’s would be one long commute to the job site. Likely only a one way trip. I guess if cryostasis every becomes viable for human space flight, you’d have a better chance living long enough to catch up to the craft, but then you’d probably have the hassle of getting reassigned to a new office team, given all your old colleagues would have long retired, and who would really want to start patching hardware in production with a support crew you only just met after waking up. Sounds like a tough remote working environment, with all the cons in a aynchronous workplace, but with none of the perk in working from home.

ruffsl,
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I was thinking of cross posting this to a Fortran community, but it looks like we don’t yet have one.

ruffsl,
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The only experience I have with working with Fortran would be setting up gfortran when building SciPy from source, and perusing its codebase to see how it’s FFT functions were so optimized. Not enough to diligently mod I’m afraid.

ruffsl,
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Similarly reported (in more detail) by TechCrunch:

ruffsl,
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I’m not sure why, but GitHub’s search engine, Blackbird, seems to be returning some erroneous results for this query:

Any chance you could narrow down your search to a list of repose that use the library that pulls in tnt_select() function, then clone and manually grep just those, or is it’s use too common to index by?

Real funny that even narrowing down GitHub search to just the same repo doesn’t help the query results:

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