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Martytoof posted:Is there a fairly easy and out-of-the-box way to give a Zero some kind of hat to allow it a ~1min runtime on power loss to give it time to force a graceful shutdown? The pi zero still has the gpio stuff so just get one of those UPS hats.
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Oct 30, 2021 02:36
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I’m not sure why I typed words like “how do I add UPS functionality to a Pi” and didn’t immediately stop myself to google search for Pi UPS hat. Good call, thank you. It might or might not work with the RaSCSI given I think they might share some GPIO ports but that’s research for me to do.
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Oct 30, 2021 03:18
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I haven't tried this yet, but I think a pwm or mppt solar charge controller, attached to a lifepo4 battery on one end, and then a ~20v laptop battery charger on the solar input would work really well. Most mppt these days have a 5v USB A 2.4a port on them The battery needed to run a pi for more than 18 hours is going to be much larger than making it mountable on a HAT is practical, so no point on integrating the power supply into the board itself, imo
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Oct 30, 2021 03:28
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There are a few USB battery banks that can charge and supply power at the same time. I'd think a Pi Zero could last a long time off a decent sized one, but I get the feeling that you're looking for something that can signal the pi for a safe shutdown and that would turn those into a project vs. a hat that already exists.
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Oct 30, 2021 22:40
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Seconding the charge-and-use battery bank idea. I'd also like suggestions if anyone has any.
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Oct 30, 2021 23:33
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The problem with the battery bank is that it can't signal the Pi or let it monitor the state of charge.
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Oct 31, 2021 00:06
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You could always just get a big capacitor, hack part of USB cable so you can set it up so the pi can monitor the voltage coming from your power source, and then have a script always running that checks the voltage of the pin connected to the USB cable. Then when it goes to zero, have the pi shut down before the capacitor runs out of charge.
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Oct 31, 2021 00:15
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If you get a non absolute cheapest solar controller, like a victron, generally they come with a programmable relay
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Oct 31, 2021 00:24
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I didn't see anyone mention it yet, but there's a Raspberry Pi Humble Book Bundle going on for the next two weeks if anyone is interested. It looks like it's mostly manuals and beginners guides to programming, but still. Also, I have a question I think I know the answer to but I wanted some outside opinions. I was using my Pi as an e-book server through Calibre, and it started acting up on me. Whenever I added a book to Calibre it would add it twice (even though they were the same format) and then would just straight up refuse to delete any of the files. It said it couldn't find a path to the trash can, and nothing I googled was able to fix it. I figured since I was having other issues with my Pi (the wifi just straight up refused to work if I had SSH on so I had to plug in an ethernet cable) I would just format the Pi and start over. And that got me thinking, I do all of my book organization on my main PC and then copy everything over to my Pi, and my computer is on basically 100% of the time anyway, so why don't I just use my personal PC as the server and use the Pi for something else entirely. Is that a terribly risky plan? I make sure to use a username/password combo on my Calibre server anyway, and I wouldn't be sharing the IP address with anyone else so there's no chance of leaks, but I got hacked about six months ago (protip: don't download dodgy programs from Reddit!) so I'm still a little skittish about security. It would just make everything easier and more streamlined if I used my PC as the server, but if I gotta re-set up my Pi it's not a big deal.
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Nov 2, 2021 14:51
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All those Pi books are available for free if you're using PiOS, though that beginners guide is pretty nice. I got it with my Pi 400.
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Nov 2, 2021 15:03
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I have my calibre setup such that only the server runs on the pi. I edit my library on my desktop with the normal program, then I rsync the library directory to the pi where it is shared by the server. I used to run the calibre server on my desktop, but sometimes I wanted to grab a book while the desktop is turned off. Also, for security I have my devices only accessible through a vpn.
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Nov 2, 2021 15:10
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Zero W 2 is a nice upgrade for homebridge. Everything runs a lot better and no real delays in homekit. I’m going to see how it handles video later this week.
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Nov 2, 2021 15:12
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I was seriously looking hard for a modern-ish Rpi for 3d printing work, and when I saw the chance to grab a Pi Zero 2, i grabbed a couple for testing and projects. I never used the original, but the small form factor is cool and aside from some slow SSH, its doing everything i need it too so far. I just need to grab some proper cables for connectivity
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Nov 2, 2021 15:44
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What's the typical use-case for a 4 or 8 gb ram raspberry pi?
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Nov 4, 2021 20:52
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GreenBuckanneer posted:What's the typical use-case for a 4 or 8 gb ram raspberry pi? same as all the others, pihole /s
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Nov 4, 2021 21:39
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GreenBuckanneer posted:What's the typical use-case for a 4 or 8 gb ram raspberry pi?  Seriously though, there aren't many individual use cases where a Pi is otherwise suitable but you really need more memory. I have yet to come up with a reason to get one even though I kind of want to. I guess if you want to run a mini-server from one and have enough services that will all be mostly idle but each need memory of their own. Possibly also for Kubernetes labs and the line.
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Nov 4, 2021 21:52
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People keep thinking they'll be able to turn a sub-$100 computer into a full PC, and the pi foundation is demonstrating their willingness to fuel that dream by stuffing more ram onto the board. And selling products that claim to be a PC. That usually lasts until the first time they visit any javascript heavy website.
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Nov 4, 2021 21:59
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What about a pihole that's also just a cheap nas? Like, for example could you use the Pi as a fileserver, and the transcoding done on a regular computer? Would 2GB ram still be enough?
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Nov 4, 2021 22:31
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GreenBuckanneer posted:What about a pihole that's also just a cheap nas? I think it makes way more sense to do it the other way. Get a cheap NAS, and run a docker container on it with pi-hole.
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Nov 4, 2021 22:36
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GreenBuckanneer posted:What about a pihole that's also just a cheap nas? This is actually a realistic use case. I tried to use a first gen pi as a linux server as backup destination, using rsync. On large files the rsync would crash because the pi didn't have enough memory. A git repo had the same issue. Since then I've bought a NAS.  So I could try it again and it'd probably be fine, there's just no need.
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Nov 4, 2021 22:39
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GreenBuckanneer posted:What about a pihole that's also just a cheap nas? 2GB of ram is plenty for a NAS, the cheaper models have that much or less. The thing that makes the Pi kinda suck as a NAS is that you're doing everything over USB attached disks with no raid acceleration. It works as a bottom-shelf NAS for someone who just wants a backup / file-dump NAS, but it's not really great at anything fancy. Also there are sub-$200 NAS boxes like the Synology DS220j that have 4k-capable transcoding hardware.
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Nov 4, 2021 22:45
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Klyith posted:2GB of ram is plenty for a NAS, the cheaper models have that much or less. The thing that makes the Pi kinda suck as a NAS is that you're doing everything over USB attached disks with no raid acceleration. It works as a bottom-shelf NAS for someone who just wants a backup / file-dump NAS, but it's not really great at anything fancy. I was looking into the Synology, even the high tier ones for 4k transcoding and they are Not Good for that. Better off trying to justify a rackmount setup but that's too much $$$ too. (it's the decent hard drives that end up costing an arm and a leg for the storage amounts I want, 10TB+) It's more of a thought experiment for now anyways, I only have a Raspberry pi 1 model B for now (if it even runs...)
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Nov 4, 2021 23:21
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Yeah the clear 4K transcoding winning setup is one of those NASes like the 220j and an old 8th gen+ i5 workstation running Plex. But that setup will consume like 120W at full tilt and costs $500 not including disks. RPis are great for setting up DNS blocking and VPN and light fileshares, or media boxes in weird spots. All that outdoor hobbies datalogging stuff is awesome too! I don’t know why any of that needs 8gb of ram though, lol.
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Nov 5, 2021 03:52
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By compiling random stuff I've got on my disk I found a Rust project that hit 1.3GB peak, I can see why you'd want 4GB, swapping slows compiling to poo poo. No reason for 8GB unless you've made the mistake of trying to use a Pi as a desktop.
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Nov 5, 2021 04:31
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Tried my hand at setting up a pihole through a VM, that was fairly easy, though finding blocklists and importing them that was actually worth a drat, is another story. Once it gets close to a million domains, it's better. It only starts off with like 30k
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Nov 5, 2021 22:24
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I've got a handful of 8gb for a hobby kubetnetes* cluster but only because I knew it was a terrible idea and did it anyways and I like throwing away money *k3s There is probably some IoT edge compute case where they're doing computer vision and applying neural network stuff that's memory heavy or whatever. Like, your home security system probably doesn't need to alert you if the family dog walks into the frame Alternatively, maybe your app is low compute, but it's a bloated Java/.net app and there's no budget to pay a developer to fix the memory usage problems. If your app needs 4gb memory and the OS uses 256mb, you're probably going to need the 8gb Edit: I was running grafana on a 4k tv and it was reallllly struggling at 1gb
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Nov 5, 2021 23:09
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My horror story of using a Pi3+ as an Adguard Home Server (similar to pihole) is that I was literally heading out of town when the thing crashed and brought down my network (since internal DNS was pointing to it). I had to refresh the SD card to get the thing working again, so be wary. I have switched to NextDNS.
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Nov 5, 2021 23:51
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W 2 zero is handling video all right in homebridge so overall pretty satisfied
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Nov 6, 2021 00:20
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Does anyone have homebridge set up with Sengled WiFi bulbs? HomeKit doesn’t understand that they’re white as well as rgb so can’t make like, warm white and I’d rather not use the Sengled app
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Nov 6, 2021 00:56
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RocketLunatic posted:My horror story of using a Pi3+ as an Adguard Home Server (similar to pihole) is that I was literally heading out of town when the thing crashed and brought down my network (since internal DNS was pointing to it). I had to refresh the SD card to get the thing working again, so be wary. I have switched to NextDNS. I've had SD cards in my Pis fail enough that I'd never rely on just a Pi
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Nov 6, 2021 15:30
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The proper way to set up a DNS adblocker is to have a secondary DNS server in your config (either on the router or local PC). The pihole / other blocker responds fast, so the client should never proceed to check the DNS #2 backup.
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Nov 6, 2021 17:50
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Klyith posted:The proper way to set up a DNS adblocker is to have a secondary DNS server in your config (either on the router or local PC). The pihole / other blocker responds fast, so the client should never proceed to check the DNS #2 backup.
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Nov 7, 2021 15:30
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wolrah posted:This can cause very unpredictable behavior with at least Windows clients where they can decide to switch over to the secondary based on a single slow response and they will stick there for a period of time meaning that you lose whatever your Pi-Hole or other special DNS configuration was providing. Yeah, this is why I use a pi that boots from a USB SSD. It hasn't eaten itself since I set that up. Though a few times I had to restart it twice after an update.
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Nov 7, 2021 15:41
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I'm really new to the Pi and have been thinking of buying a few. One I would like to setup as a router. And the other two as Steam Link devices on my TV's. The burning question I have is how much RAM should the router Pi have and how much for the Steam Link Pi's? I'm planning on using 64MB MicroSD cards in each.
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Nov 8, 2021 17:18
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Pi is a lousy router because it has only one ethernet port. If you want a cheap tinker friendly router get a mikrotik or flash an off the shelf router with OSS firmware. They come with an added bonus: the OS won't corrupt on power loss.
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Nov 8, 2021 17:26
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And as a wireless router they have a tiny integrated antenna that will have terrible coverage compared to a cheap actual router.
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Nov 8, 2021 17:36
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Rojo_Sombrero posted:I'm really new to the Pi and have been thinking of buying a few. One I would like to setup as a router. And the other two as Steam Link devices on my TV's. The burning question I have is how much RAM should the router Pi have and how much for the Steam Link Pi's? I'm planning on using 64MB MicroSD cards in each. What led you to the idea of a Pi as a router? Like I said, this comes up regularly so you're far from the only person, I just don't get why the idea is so persistent because the Pi family is historically famously bad at networking and even the Pi 4 that doesn't suck at it has very limited capabilities.
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Nov 8, 2021 17:43
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wolrah posted:Please don't take this as me picking on you in particular, this comes up every now and then and I've never been able to figure it out so I felt the need to ask. People who are new to the platform have no idea what the Pi is historically bad at, but do know what a router is. It's one of a relatively short list of "how can I learn about Thing" projects that don't depend on some non-computer hobby. In other words, basically all prospective pi users use a router, but only a subset have a need for automated plant watering, a dedicated _____ server, or a pornography enabled toaster. So it makes sense that it's relatively common as babby's frist pi project.
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Nov 8, 2021 17:58
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Off the shelf Linux machine with wide support and a pretty small barrier to entry on the cost front would be my guess. While grabbing a cheap used router and tossing Tomato/OWRT/whatever on there could be done cheaper/better the process is hinky enough that I suspect people may not consider it by default. That and the Pi’s reputation as a “do all sorts of things” all in one solution. I’d be interested in hearing OP’s line of thinking, I could see it working if you use a dedicated AP and switch and the Pi purely as a router.
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Nov 8, 2021 18:03
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wolrah posted:Please don't take this as me picking on you in particular, this comes up every now and then and I've never been able to figure it out so I felt the need to ask. I completely get why you are asking this question. It's mostly driven by various videos I've seen on Youtube. And the desire to have a small router.
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Nov 8, 2021 18:43
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