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What's really interesting about @sys is that it supports a search-path at run-time, so the resolution can walk back through a list of target systems to find an available one.


> especially since traffic would reduce an EV's range.

Very much a misconception; unlike in an ICE, you're not consuming energy idling in traffic, in fact your efficiency tends to go up with the lower speeds in traffic.


I was thinking more about stop-and-go traffic, as opposed to moving slowly but at a steady pace. I'd expect the repeated accelerations to consume more than just going at a constant speed. Is that not the case?


Not terrible unless you are lead footing both the accelerator and brake.

Also as far as Stop and go... its typically also lower speed; wind resistance is not linear based on speed, so 'crawling' is not that bad.

Im in the US and drive a hybrid rather than an EV, that said 'stop and go' is when I will often seem an MPG -increase-, so long as I gently accelerate (in severe stop and go, just letting my foot off brake and not touching gas).

That's also some of the justification for 'mild hybrids' that have an auto stop and maybe at best a 11kW/120Nm electric motor to kick things off. If you don't drive with a lead foot they can improve efficiency (but overcomplicate things compared to Toyota HSD)

I suppose main counter condition would be in low temperature conditions; AC is fairly efficient, Heating less so, and then in severe cases the batteries need to activate their own self heaters.


You get a lot back (70% or so) from the regenerative braking.


Thanks for taking the time to do such a thorough writeup on this - it's fascinating to compare with the install we did a couple of months ago on our house in the UK.

We already installed a Daikin Altherma 3 air-to-water heat pump three years ago, which heats around a thousand meters of underfloor pipework + domestic hot water cylinder, but recently added a Daikin air-to-air heat pump. This is relatively new to the UK, at least in homes, so there aren't many contractors in the market yet.

Making good afterwards is certainly the challenge - I'm still repairing the plasterboard (drywall) holes, which I needed to make for access into the eaves. (I preferred this to having lots of external plastic trunking.)

I'm looking forward to seeing how the air-to-air heat pump helps with our winter humidity.


*anycast


Really interesting. What sort of hardware would be needed to use this?


I know little about this but I think the device is called HackRF and costs about $350. It can act as a receiver and sender.

If you want to tinker with radio stuff for less money, you could start with a receiver only and try RTL-SDR. RTL-SDR is software-defined radio (=SDR) based on a particular RealTek (=RTL) chip. Suitable devices are as cheap as the right DVB-T USB receiver (check the list in the reddit-wiki for what might work and what might not) but there are more optimized devices for approximately $40 (un)available (because supply chain) - have a look at the rtl-sdr shop for those.

https://www.rtl-sdr.com/

https://www.reddit.com/r/RTLSDR/


Thanks, that's really useful. I had always wondered about the possibility of doing something like this with my children's various RF-controlled toys.


You might like these two posts:

"Hacking My Ceiling Fan's Wireless Remote with a USB TV Tuner", https://www.riveducha.com/decode-wireless-signal-with-usb-tv...

"Abusing RPi GPIO pins as a radio controller", https://www.riveducha.com/raspberry-pi-gpio-send-radio-signa...

Have fun and if dad modding their toys gets your kids interested in hacking/tinkering then all the better.


Presumably you're referring to the practice of answering queries for nonexistent records with an A record belonging to an advertisement page? (instead of doing the right thing answering NXDOMAIN, presuming no records of another type also exist for the queried name.)

dnsmasq has a really useful feature for dealing with this: --bogus-nxdomain


It would be really good to see RFC 5233 local-part filtering characters (e.g. '+') being permitted in the validation for email addresses on this list. It's much less of a problem these days, but the number of times a sign up form has flat out refused to accept these as valid - or worse the sign up process accepted it, but the login simply doesn't work!


Many of these sites, such as your bank, or telco, if you talk to a human using a terminal screen, the human can type in the + symbol for you.


You need to install linux-headers-rpi to build wireguard on Raspberry Pi OS - should be good then.


Yes actually I tried it last when the raspios 64 beta was just released and didn't have an SSD for the pi (SD cards are really slow). I plan on adding another pi for building and one for DNS so that if the Pi is compiling it won't slow down any DNS queries (which it shouldn't but you never know).


As an update to yesterday: After emailing our local Member of Parliament (Rt Hon Dame Cheryl Gillian), and reaching out to Openreach CEO Clive Selley, we've finally been connected!

A member of the Chief Engineer Technical Escalation Team was put on the case, who arranged for a Senior Engineer to visit us today. The engineer arrived early this morning, and immediately set about finishing the copper run from several poles away to us. Before long he was back at our door to handle the internal wiring, which he quickly noted had an unnecessary route bridge (I don't know what this means, but it relates to internal copper wiring), which was degrading the signal. After the fix, he got us up and running at just under 30Mb/s (7Mb/s upload) - not stellar, but this will do until our longer term plans come to fruition (a joint FTTPoD order with many of our neighbours, using the Government's DCMS Gigabit Voucher Scheme to bring us 900Mb/s full-fibre).

My family and I are extremely grateful to Clive Selley and his team for taking a personal interest in our case, and local MP Cheryl Gillian's staff for playing their part. (sadly there was no response from Sky CEO Jeremy Darroch.)

The engineer who ultimately got us connected today told me he was in the process of studying for a masters in Nuclear Engineering, and I wish him the very best in that endeavour!


Sadly you're right. AAISP is very much worth a look, but they're not cheap. We went with Sky because they're good for the low price point - our longer term play is a joint order with the majority of our street for FTTPoD (Fibre to the Premises on Demand) through Cerberus Networks (which will cost quite a bit more, but take time). (this will eventually get us up to 900Mb/s, and the build will be entirely funded by the Governments DCMS Gigabit rural broadband voucher scheme, and built by Openreach.)

All indications are that Cerberus are extremely technical - the sales guys were able to talk BGP happily (not literally).


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