General > General Technical Chat
Raspberry pi forums "banned" me again - <LOL - facepalmed hard>
mikeselectricstuff:
--- Quote from: Karel on September 05, 2021, 07:11:38 am ---
--- Quote from: bd139 on September 04, 2021, 06:39:57 pm ---I think you need to read around. Look for the Wallbox and Hypervolt EV chargers - they use a Pi inside! :palm: :palm: :palm: :palm: :palm:
--- End quote ---
The Hypervolt uses a traditional RPI. Wallbox doesn't, they use an RPI compute module which is fine:
https://techcrunch.com/2021/08/03/security-flaws-found-in-popular-ev-chargers/
--- End quote ---
Using the CM is certainly better, but it's still vast overkill for that application, so there's much more code in there that could go wrong or present a security problem.
bd139:
It's probably a fair assertion to use a Linux SoC for the network side of it. What worries me is how much control that has over power delivery. I'd hope they hell that was a separate MCU with a constrained verified protocol between it and the host computer.
Also the RPi compute module is a dumb idea. Just solder a COTS SoC onto the damn board. There are enough of them out there!
mikeselectricstuff:
--- Quote from: bd139 on September 05, 2021, 09:47:07 am ---It's probably a fair assertion to use a Linux SoC for the network side of it. What worries me is how much control that has over power delivery. I'd hope they hell that was a separate MCU with a constrained verified protocol between it and the host computer.
Also the RPi compute module is a dumb idea. Just solder a COTS SoC onto the damn board. There are enough of them out there!
--- End quote ---
All it needs to do is exchange very small amounts of data to their server over wifi - Linux is total overkill, and introduces an unnecessarily large attack surface.
Something like an esp32 would be more than adequate - the actual EVSE functionality is trivially small - literally just a PWM to the car to tell it how much it's allowed to draw, on/off control of a contactor and some simple fault detection.
guenthert:
--- Quote from: eti on August 30, 2021, 09:33:08 pm ---It seems the rather hypersensitive, antagonistic "staff" :-DD at raspberry pi forums, are, in fact, a set of hired 12 year olds, as they seem unable to face ANY civil discourse or mature discussion, and have VERY thin skin!
[..]
--- End quote ---
Uh, to me it looks like some different interpretation of what a civil discourse or mature discussion might be. There clearly are different understandings of what is acceptable and that might even change over time. Look e.g. at the Linux kernel community. Throughout the 90s that was a comparatively rough place (looking backwards, almost comically so). Then, with growing popularity of Linux, also in professional settings, some complained of unacceptable behavior, not the least of Mr. Torvalds himself. At first those complainers where laughed out the house, but over the years, majority sentiment changed, until a couple years ago, Linus demonstratively changed himself (either due to community pressure or by, well, maturing). Perhaps you'll have more reach by focusing on the technical issues with the devices, rather than the personalities of the members of the organization?
The RPi devices sure have flaws, I'd think the recent ones less than the early ones, which perhaps limit their usefulness, but evidently don't make them useless. I compare them to the home computers of the early/mid eighties, which had their warts as well, which didn't stop them to become hugely popular and for many a kid was the entrance into a lifelong passion or career.
james_s:
I suspect the change in Mr. Torvalds' behavior is almost entirely down to simply getting older and more mature. Social skills do not come naturally to many of the sort of people who become engineers. I'm not naming any names but even at his worst he was less rude and abrasive and arguably more helpful than a few of the people who have passed through this forum.
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