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Nine Raspberry Pis powering an office (2016)

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Re: Nine Raspberry Pis powering an office (2016)

#141

Post by parallel »

newshorts wrote: post #4

When I see companies build bespoke solutions like this I can’t help but wonder which client paid for that. Don’t get me wrong I would love to spend the time to build a system like that, as an engineer it sound fun! No doubt this project came at the cost of someone paying the company for value that was not transferred Sorry for being Daniel Downer here…

Another way to think of it is that the business owners decided not to take some profit out of the business in order to improve the culture of the workplace.

Re: Nine Raspberry Pis powering an office (2016)

#142

Post by somehnguy »

thrwyoilarticle wrote: post #61
somehnguy wrote: post #59

Earlier quoted context omitted.

What power supply were you using? My Pi 4 running 2 instances of Octoprint kept crashing until I switched to their official power supply. On previous models I always got away with whatever power supply I had around but the 4 doesn't play around when it comes to power consumption.

The one it came with!

I've had various Pi models over the years starting with the original and I've never gotten a power supply with it. You must have bought a bundle deal, which could mean a good or bad one depending on the seller..

Re: Nine Raspberry Pis powering an office (2016)

#143

Post by c_o_n_v_e_x »

As a controls engineer in a past life, I like seeing projects like this. Johnson Controls, Honeywell, etc. have been eye gouging customers on proprietary hardware.

I've toyed with the idea of starting an open source building automation hardware company. There's quite a few open BAS software packages floating around now too.

Re: Nine Raspberry Pis powering an office (2016)

#144

Post by iudqnolq »

How are you emulating an IR remote on a raspi?

I dropped down to Rust and gave the thread max priority in Linux but still couldn't toggle the port fast enough (the remote outputs square waves where the signal for the same button varies by low hundred of microseconds. The frequency changed rapidly enough that I can't use the rpi's built-in pwm).

It seemed I'd need a dedicated board running something more embedded-y the rpi communicates with. Instead, I'm going to try to solder transistors to the capacitive buttons on the existing remote and re-use it's board. Unfortunately I can't get replacement remotes and I'm just learning how to solder, so I'm not confident in success.

Re: Nine Raspberry Pis powering an office (2016)

#145

Post by Causality1 »

c_o_n_v_e_x wrote: post #143

As a controls engineer in a past life, I like seeing projects like this. Johnson Controls, Honeywell, etc. have been eye gouging customers on proprietary hardware. I've toyed with the idea of starting an open source building automation hardware company. There's quite a few open BAS software packages floating around now too.

Can a Pi match the sort of real-time performance of something like a Controllogix PLC?

Re: Nine Raspberry Pis powering an office (2016)

#146

Post by glouwbug »

Causality1 wrote: post #145
c_o_n_v_e_x wrote: post #143

As a controls engineer in a past life, I like seeing projects like this. Johnson Controls, Honeywell, etc. have been eye gouging customers on proprietary hardware. I've toyed with the idea of starting an open source building automation hardware company. There's quite a few open BAS software packages floating around now too.

Can a Pi match the sort of real-time performance of something like a Controllogix PLC?

It'll be infinitely easier to program than ladder logic, that's for sure

Re: Nine Raspberry Pis powering an office (2016)

#147

Post by a1369209993 »

kd913 wrote: post #134
yumraj wrote: post #106

Earlier quoted context omitted.

> DNSCryptProxy -> Great for ensuring all DNS requests on the network via DNS over HTTPS. Kind of useful because frankly ISPs are sniffing DNS traffic. Also useful for bypassing DNS based ISP filters. If you're using PiHole, you can just use cloudflared to do DoH. https://docs.pi-hole.net/guides/dns/cloudflared/ On a different note, biggest reason I've never installed a VPN at home is because I just prefer a deny-eve…

I use DNSCryptProxy because I can use it with Firefox as a local TRR server, supports additional filtering, supports DNSCrypt and ODoH caching and is open source. It also picks from 140 or so anonymous DoH relays, with specifics for nologs and dnscrypt support. Why would I go for just 1 arbitrary provider rather than the lowest latency choice out of 140? I also think the latter point is a bit overblown. So long as yo…

> Why would I go for just 1 arbitrary provider rather than the lowest latency choice out of 140?

Because a ISP that can compromise any one of those 140 different single points of failure can now make that one have the lowest latency and give you malicious DNS results just like you never secured anything.

This is the same problem as allowing 140 different CAs to issue certificates for subdomains of com, rather than forcing the fucking registry to do it when you get a domain name in the first place.

Re: Nine Raspberry Pis powering an office (2016)

#148

Post by rytis »

jandrese wrote: post #90
Damogran6 wrote: post #20

My RPi's are like lottery tickets. I buy them with the thought of all they could be used for...then collect duct in the junk drawer. I also tell myself I'm supporting the manufacturer, though it would appear they don't need my help.

I just pulled out one this weekend after my ISP decided to refresh my IP and gave me on that was apparently used by Satan himself. All google services were just blackholing my traffic, it was breaking everything. I have never seen it that bad before, I've gotten CAPCHAs before, but never have I seen it just plain never respond to SYNs. I tried to force it to refresh but their router was insistent on me keeping that c…

If you have control over the router that's connecting to your ISP, and assuming it allows such a thing, try changing its MAC address. EdgeRouterX for example allows this. Chances are, you get different IP.

Re: Nine Raspberry Pis powering an office (2016)

#149

Post by Havoc »

beezischillin wrote: post #91

The Pi4 is an amazing piece of hardware. While relying on sd cards is a sure way to get a disappointing surprise, they now support booting off a USB drive, which is amazing. Couple it with even a sata ssd and a USB adapter and you’ll be amazed how fired up it becomes. A Linux without a GUI boots in mere seconds. My biggest complaint really is the availability, especially now. I had to buy one of those mini Intel Atom…

Want to try pxe boot instead of buying 3x crappy ssd but haven’t gotten round to it yet. In theory that should sidestep the SD card issue

Re: Nine Raspberry Pis powering an office (2016)

#150

Post by kd913 »

a1369209993 wrote: post #147
kd913 wrote: post #134

Earlier quoted context omitted.

I use DNSCryptProxy because I can use it with Firefox as a local TRR server, supports additional filtering, supports DNSCrypt and ODoH caching and is open source. It also picks from 140 or so anonymous DoH relays, with specifics for nologs and dnscrypt support. Why would I go for just 1 arbitrary provider rather than the lowest latency choice out of 140? I also think the latter point is a bit overblown. So long as yo…

> Why would I go for just 1 arbitrary provider rather than the lowest latency choice out of 140? Because a ISP that can compromise any one of those 140 different single points of failure can now make that one have the lowest latency and give you malicious DNS results just like you never secured anything. This is the same problem as allowing 140 different CAs to issue certificates for subdomains of com, rather than fo…

https://github.com/DNSCrypt/dnscrypt-proxy/wiki/Configuratio...

>minisign_key is a public key, used to verify that the content is legitimate. Lists can thus be served from any location, even from an untrusted ISP: dnscrypt-proxy will immediately detect and reject something that has been tampered with.

>https://dnscrypt.info/stamps-specifications/ >https://dnscrypt.info/faq

An ISP will not be able to spoof the sources or these stamps. They wouldn't put the effort in. Even if they did, it is factored and thought about.

More harmful would be a malicious DoH relay but I trust the devs.That I think is fixed by mandating the use of DNSSec too for my relays.

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