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Raspberry Pi 4

raspberrypi.org

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Re: Raspberry Pi 4

#751

Post by sgnelson »

dheera wrote: post #658
cyberjunkie wrote: post #3

Oh my! This is such a crazy upgrade. I've been using the RPI2 as my HTPC/NAS at my folks, and I'm so happy with it. I was itching to get the last one for myself. USB 3.0! Gigabit Ethernet! WiFi 802.11ac, BT 5.0, 4GB RAM! 4K! $55 at most?! What the!? How the??! I know I'm not maintaining decorum at Hacker News, but I am SO mighty, MIGHTY excited! I'm setting up a VPN to hook this (when I get it) to my VPS and then do…

Excited too, but $55 + $13.95 shipping = $68.95 is inching closer to the $99 (free shipping) territory of the Jetson Nano.

IMO, at this point you're not paying so much for the pi, but rather for the community and accessories. It's the entire environment that makes the pi useful; not just the hardware.

(I speak as someone who sucks at programming and doesn't spend a 1/100th of the time learning the latest as I used too as a teen. So having the community around to help with my latest project that I need something more than a microcontroller for, is immensely worthwhile. Obviously those who don't need these types of spillovers would probably be better served with other hardware.)

Re: Raspberry Pi 4

#752

Post by HeWhoLurksLate »

fpgaminer wrote: post #714
jki275 wrote: post #652

Earlier quoted context omitted.

It is, but in my experience the reliability factor is pretty ugly for the rpis. I'd rather either pay directly for the device designed for it, or just run the software on a machine already on the network. Obviously that doesn't work for everyone.

RasPi reliability is tricky, for sure. The recipe that's working for me now is brand name power supplies (RasPi foundations, CanaKit, or Adafruit) and brand name SD cards. Don't trust SD cards that come in RasPi bundles or kits, even from Adafruit; I've had those fail horribly. So far all my Samsung cards are working great. I've also been using A1 grade SanDisks, no issues so far (only been a few months) as well as u…

For power supplies, my go-to is Apple iPad chargers (the older ones) because they're built to last.

Long-term, my plan is to mod some flavor of computer PSU and get properly regulated 5V out of it.

Also, I'm one of those people who runs a UniFi controller on a Pi. I used Docker, it's been totally fine for my uses.

Re: Raspberry Pi 4

#753

Post by alexives »

fpgaminer wrote: post #717
itronitron wrote: post #712

Earlier quoted context omitted.

I actually came here to ask which would be a better platform for building a CNC, Raspberry Pi or Arduino. Is your cheap grbl CNC using an arduino to control the steppers?

Yeah it's the cheap 3018 Pro from Sainsmart. An Arduino runs GRBL to control the steppers. I tacked on a RasPi 3B+ running CNCjs so the CNC could be operated headlessly. Normally you need a laptop or something hooked into it over USB to feed it your G code, or do manual control. But I didn't want my laptop in the shop getting dusty while the CNC runs, and I also didn't want to risk the cheap CNC failing and throwing…

I do the same thing! Plus, with the webcam integration you can keep an eye on it from another room. (Not too far though in case something goes wrong)

Re: Raspberry Pi 4

#754

Post by aoeusnth1 »

sbov wrote: post #746
fpgaminer wrote: post #546

Earlier quoted context omitted.

That's silly. RasPis are stupidly useful. I've got: * A Zero W hooked up to a PM2.5 to do air quality monitoring in the house. Just bought a couple more sensors for it (VOC, eCO2, etc), but haven't hooked them up yet. * A 3B+ running the UniFi controller for my home network. * One is running a custom Hue automation I built to shift the color temperature of the lights throughout the day. * One is built into an interne…

> * A Zero W hooked up to a PM2.5 to do air quality monitoring in the house. Just bought a couple more sensors for it (VOC, eCO2, etc), but haven't hooked them up yet. We have neighbors that smoke, and sometimes based upon wind patterns it blows into our yard. Any idea if they have sensors that can pick up this sort of thing so I can close our windows?

Should be picked up by a PM2.5 sensor.

Re: Raspberry Pi 4

#755

Post by dguaraglia »

Drdrdrq wrote: post #618

Did anyone figure out what to do with failing SD cards and USB keys? I gave up trying to reinstall everything on my Pi after (almost) every power loss.

Huh, that's bizarre. We've been using Raspberry Pi in remotely deployed devices for ~2 years now. These devices reboot on a regular basis. So far, not a single one of the cards has failed.

Re: Raspberry Pi 4

#756

Post by aerophilic »

opencl wrote: post #524
ubergesundheit wrote: post #487

Earlier quoted context omitted.

> CPU: 1.5-GHz vs 1.4-GHz (same cores) Isn't it Cortex-A72 vs Cortex-A53 ?

It is, and the A72 has ~2-3x the IPC of the A53 depending on workload.

Realize I should have added that... but no way to edit original post... is there an easy way to do so?

Re: Raspberry Pi 4

#757

Post by apple4ever »

sgnelson wrote: post #751
dheera wrote: post #658

Earlier quoted context omitted.

Excited too, but $55 + $13.95 shipping = $68.95 is inching closer to the $99 (free shipping) territory of the Jetson Nano.

IMO, at this point you're not paying so much for the pi, but rather for the community and accessories. It's the entire environment that makes the pi useful; not just the hardware. (I speak as someone who sucks at programming and doesn't spend a 1/100th of the time learning the latest as I used too as a teen. So having the community around to help with my latest project that I need something more than a microcontrolle…

Absolutely this.

I mentioned it above, but just to reiterate- there are lots of great hardware boards out there and many beat the Pi (though the 4 makes up the different finally). However, they ALL have terrible software support: old OS's, bad drivers, out of date or incomplete documentation.

The Pi community makes it worth it to stay there.

Re: Raspberry Pi 4

#758

Post by cesarb »

zackmorris wrote: post #724

Does anyone have a link for building a Raspberry Pi cluster over gigabit ethernet? A quick search turned up some stuff: https://medium.com/@glmdev/building-a-raspberry-pi-cluster-7... https://epcced.github.io/wee_archlet/ https://www.raspberrypi.org/magpi/cluster-computer-raspberry... Specifically, I'd like to find software that makes the cluster appear as a single memory address space and N identical CPUs/cores. Whe…

> Specifically, I'd like to find software that makes the cluster appear as a single memory address space and N identical CPUs/cores.

This is called "single system image". A couple of coworkers played with openMosix on our desktops several years ago, it was fun seeing bash processes moving on their own from one desktop to the other. But I haven't heard anything about that in a while, it seems single system image clusters have fallen out of fashion.

Re: Raspberry Pi 4

#759

Post by gwilkes »

apple4ever wrote: post #757
sgnelson wrote: post #751

Earlier quoted context omitted.

IMO, at this point you're not paying so much for the pi, but rather for the community and accessories. It's the entire environment that makes the pi useful; not just the hardware. (I speak as someone who sucks at programming and doesn't spend a 1/100th of the time learning the latest as I used too as a teen. So having the community around to help with my latest project that I need something more than a microcontrolle…

Absolutely this. I mentioned it above, but just to reiterate- there are lots of great hardware boards out there and many beat the Pi (though the 4 makes up the different finally). However, they ALL have terrible software support: old OS's, bad drivers, out of date or incomplete documentation. The Pi community makes it worth it to stay there.

To add to this, the bad software support had very real performance implications as well. I was surprised to see benchmarks where the Pi 3 dominated boards that very clearly beat it on paper

Re: Raspberry Pi 4

#760

Post by dheera »

jacquesm wrote: post #740
rtio wrote: post #732

Earlier quoted context omitted.

When you add up adapters and cables the rpi is closing in on a chromebook on sale. So not that cheap any more.

Comparing one item at list with another on sale is a bit of an apples-to-oranges comparison.

Not really, what matters to me is the price I can get them at, including shipping, including taxes, including shenanigan fees, including sales, including discount codes, including 5% cashback on Amazon, including 1% cashback on other sites.

RPis pretty much never go on sale.

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