&gt; I&#x27;m working on turning it into a IR emitter to control some stuff that I have that lack remotesThat&#x27;s really neat. Please share some details – I was planning on buying a Broadlink IR&#x2F;RF device for that purpose.

I&#x27;m working on turning it into a IR emitter to control some stuff that I have that lack remotes. I have another I&#x27;ve loaded snips onto an will be experimenting with soon - I&#x27;m currently using a PlayStation eye for the experimentation, but will have to get a better microphone&#x2F;speaker. I wish I could hack a dot&#x2F;echo&#x2F;etc. and use their microphone&#x2F;speaker, but meh, I&#x27;ll take what I can get.Also, the IR pi will probably drive some ambient light as well.

Yep. As much as I’d like to play around with it, I have no projects in mind that aren’t pure-software and easier on my laptop, or just end up filled with pre-made solutions to save on support time. Shame, but there you go.

I&#x27;m scared that if the pi is down then the whole internet is down (i&#x27;m not always home with my family, so if I&#x27;m away I couldn&#x27;t fix it).
How do you manage failover ?

If yours has wi-fi (Pi 3 and above or Pi Zero W) you can always just leave it plugged in somewhere innocuous as a pi-hole. It&#x27;s super useful and takes almost no time to set up, provided you can change the settings on your router to use it as DNS.

Thanks, forgot what it was, and didn&#x27;t have time to dig around in the docs where I first ran into it.The fact that this is not widely advertised as a feature is surprising. It made remote control automatic instead of having to hack something together.

The remote control tech is CEC.<a href="https:&#x2F;&#x2F;wikipedia.org&#x2F;wiki&#x2F;Consumer_Electronics_Control" rel="nofollow">https:&#x2F;&#x2F;wikipedia.org&#x2F;wiki&#x2F;Consumer_Electronics_Control</a>

Media player connected to tv. (Kodi or Elec, I can&#x27;t recall which)What I found really neat about this is that if you use the HDMI connection, there is some automated setup&#x2F;control that allows my tv remote to control the PI. (through the HDMI connection)But also, the smart phone app for Kodi remote control added a new layer of interaction with the media player that is just sort of unique and unexpected. (everything worked so easily)

Does work-in-progress count? I have two with cameras I am attempting to rig up as a frontend&#x2F;backup camera in my Humvee (very necessary!), hopefully w&#x2F; UI on iPhone

I use it to build a cloud backup system. My files in the computer will automatically sync to Raspberry Pi.

I have several, I use them for multiroom audio with snapcast (mostly with USB DACs although one has a DAC hat.
Some have temp and humidity sensors, one has the rpi cam. 
One has a always on vpn connection and transmission running.
For a while I used one with a Parsec client and cloud gaming. 
However, I use a Odroid XU4 for all the big stuff (home assistant, NAS, nodered, mopidy, etc.)

I spent a while figuring out the cheapest possible way of doing front end dev for a series of blog posts (that I never wrote) . The result was using a Pi3B+ and a lot of open source tools, Github and Netlify. It works so well I&#x27;m still using it for a ton of dev.

I got a bunch of them running Screenly (<a href="https:&#x2F;&#x2F;www.screenly.io" rel="nofollow">https:&#x2F;&#x2F;www.screenly.io</a>), so I&#x27;d say that&#x27;s a good use :)Also, I&#x27;m using PiHole and Home Assistant.Disclaimer: I&#x27;m the author of Screenly.

Since I only installed the Kano OS image on a bog standard Pi 3, it&#x27;s basically this without all the accessories. <a href="https:&#x2F;&#x2F;kano.me&#x2F;store&#x2F;us&#x2F;products&#x2F;computer-kit" rel="nofollow">https:&#x2F;&#x2F;kano.me&#x2F;store&#x2F;us&#x2F;products&#x2F;computer-kit</a>It&#x27;s great that Kano makes it available standalone. Kano OS has all the activities built into the image, including visual coding of Minecraft and other tools, and guided lessons around using the Terminal. Chromium and LibreOffice are also installed by default. There&#x27;s also a curated app &quot;store&quot; like experience to add new games.Installing CUPS to add our printer to the Kano OS Pi was pretty straightforward, so he also uses it for personal writing and printing out stories.It&#x27;s really engaging for our son, and provides ample time for parent-child learning opportunities to boot. We ended up getting the Pixel Kit while we were at it, and Kano OS picked up on it immediately and exposed all the lessons for it.Hoping their move to Windows 10 doesn&#x27;t leave their Kano OS image locked to a Pi 3, though. I&#x27;d love to upgrade his Pi to a 4 soon.Kano OS Image: <a href="https:&#x2F;&#x2F;hello.kano.me&#x2F;downloads&#x2F;" rel="nofollow">https:&#x2F;&#x2F;hello.kano.me&#x2F;downloads&#x2F;</a>

Anything you&#x27;ve learned to share about having it as a computer for your first grader?  I recently set one up for my daughter, same age, but haven&#x27;t put much thought into the software side yet. She&#x27;s played Minecraft-pi a couple of times, we made the cat meow in Scratch, and we used it to watch a movie the other day, but that&#x27;s it so far.

Pi-Hole, RetroPie, and for my 1st-grade son I installed Kano OS for his first computer. I see a couple of Pi 4s as upgrades in my future.Also looking to get my SDR rig up and running on one of the other Pis i have waiting to be used.

Media center &amp; TV PC. I have a 4 TB external hard drive connected to it (and swap on it). Using a custom compiled kernel with zswap support, browsing the web isn&#x27;t that bad with the 1GB of RAM on the 3B.I&#x27;ve also hooked up an RTL-SDR to it and ran rtl-tcp instead of needing to run a long USB cord.

I&#x27;m actually more concerned about lightning strikes hitting the antenna, frying the Pi, traveling down the Ethernet cable and frying my router. I&#x27;m still a ham in training but I&#x27;ve been told that it&#x27;s best practice to disconnect the antenna and isolate it from your setup. Some hams as far as placing their connectors in glass jars.I don&#x27;t want to use a relay on the antenna cable because 1) it&#x27;ll pick up RF interference, and 2) if a direct strike hits it, there&#x27;ll be enough energy to jump the gap in the relay anyways.I might figure out a more permanent solid-state solution in the future though. Like I said, still learning :)

You could probably automate cutting the power with a relay switch also connected to the pi. Just scrape weather data, and if you expect the storm, trigger the switch.

I used it to monitor ADSL device status[0], also created a DIY timecapsule for MacOS[1] — these were all in the past, though.Currently the Pi is on my roof, connected to an SDR. I sometimes run rtl_server on it, and listen around. Although it&#x27;s been a hassle, since I have to run upstairs and disconnect it everytime there&#x27;s a storm. Also, listening to the device over WiFi means I get really laggy control over my SDR. I&#x27;m planning on replacing the Pi with something better powered.[0]: <a href="https:&#x2F;&#x2F;github.com&#x2F;amingilani&#x2F;scruffy" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;amingilani&#x2F;scruffy</a>[1]: <a href="https:&#x2F;&#x2F;github.com&#x2F;amingilani&#x2F;chronopill" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;amingilani&#x2F;chronopill</a>

Nice! Thanks for the link. Our goal was to hit a cool shot a mile away on a target in the middle of a giant concert for a &quot;I was there!&quot; memento shot. Good to see it in practice somewhere.Unfortunately the sales team didn&#x27;t understand it, and what sales team doesn&#x27;t understand sales team doesn&#x27;t sell....I&#x27;m very happily in another company that gets tech - but man I wish we could have sold that project. The effect was really cool when we had it working fine.

Disney now have exactly what you described in your first project as a photo opportunity at the Magic Kingdom.<a href="https:&#x2F;&#x2F;disneyparks.disney.go.com&#x2F;blog&#x2F;2019&#x2F;05&#x2F;enjoy-new-disney-photopass-experiences-at-walt-disney-world-resort&#x2F;" rel="nofollow">https:&#x2F;&#x2F;disneyparks.disney.go.com&#x2F;blog&#x2F;2019&#x2F;05&#x2F;enjoy-new-dis...</a>

The infinite zoom project is really interesting. I&#x27;m shocked that it never got picked up! The use cases you describe sound incredibly obvious for big events.

Great projects. I tried clicking the link for 1. Looks like some of the URL is truncated. You may want to update the link :-)This worked for me : <a href="https:&#x2F;&#x2F;medium.com&#x2F;@thekeithchester&#x2F;gigasnap-a-prototyping-story-efed72099d32" rel="nofollow">https:&#x2F;&#x2F;medium.com&#x2F;@thekeithchester&#x2F;gigasnap-a-prototyping-s...</a>

I&#x27;ve made some interesting projects over the years - only a writeup on a few of these, and some are in pieces and in various states of disrepair after moving so much.Some write ups on larger projects:1. I used a raspberry pi to coordinate the firing of multiple cameras, and then had the pi upload to a cloud service that would stitch them together to an &quot;infinite zoom&quot; super selfie. <a href="https:&#x2F;&#x2F;medium.com&#x2F;@thekeithchester&#x2F;gigasnap-" rel="nofollow">https:&#x2F;&#x2F;medium.com&#x2F;@thekeithchester&#x2F;gigasnap-</a>
a-prototyping-story-efed72099d322. I created a library that made it dead simple for a raspberry pi to communicate to arduinos, and used that to control a lot of hardware projects, like little robots. <a href="https:&#x2F;&#x2F;medium.com&#x2F;@thekeithchester&#x2F;serial-synapse-94a114aa271e" rel="nofollow">https:&#x2F;&#x2F;medium.com&#x2F;@thekeithchester&#x2F;serial-synapse-94a114aa2...</a>3. Raspberry Pi&#x27;s controlled the heartbeat detection (controlled lights and music of your booth) and conductive paint controller (I built it and still don&#x27;t understand the meaning) for this art piece. <a href="https:&#x2F;&#x2F;vimeo.com&#x2F;207047769" rel="nofollow">https:&#x2F;&#x2F;vimeo.com&#x2F;207047769</a>4. I had a video &#x2F; text message doorbell a couple of apartments ago. <a href="https:&#x2F;&#x2F;github.com&#x2F;hlfshell&#x2F;doorbell" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;hlfshell&#x2F;doorbell</a>5. Used one as an MQTT hub for numerous IoT projects. I created <a href="https:&#x2F;&#x2F;github.com&#x2F;hlfshell&#x2F;mqtt-scheduler" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;hlfshell&#x2F;mqtt-scheduler</a> to schedule MQTT jobs for things like the arduino powered garden controller (lights + water pumps) I built for my wife. <a href="https:&#x2F;&#x2F;github.com&#x2F;hlfshell&#x2F;garden-relay" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;hlfshell&#x2F;garden-relay</a>6. This never got off the ground, but when Pokemon Go had first launched and was super popular, I wrote a slackbot that would alert everyone in the office when pokemon (outside of the super common Rattatas and Pidgeots) was nearby. I was repurposing that code to make a portable Pokemon radar that would jump a false account around the area around you, thus hunting down pokemon for you. <a href="https:&#x2F;&#x2F;github.com&#x2F;hlfshell&#x2F;pokemon-tracker" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;hlfshell&#x2F;pokemon-tracker</a> It never got far as the game got super stale quick.

Most of the services (FlightAware, Flight Radar 24, ADSB Exchange) get much of their data from volunteer-operated receivers. If you feed your own data to these networks, you get several benefits including multilateration capability (computed location for planes that don&#x27;t send their own GPS location data) and free business accounts on FlightAware and Flight Radar 24.

Perhaps they are in a remote location that doesn’t have data?

FlightAware in particular gives you access to a greater level of data and services on their site if you&#x27;re an active contributor via a PiAware. 
Also, honestly, it&#x27;s just fun fooling around with the antenna and software setup to maximize the number of flights I can see :)

Is there a benefit to personally tracking flights instead of querying 3rd parties?

Running piAware for flight tracking<a href="https:&#x2F;&#x2F;flightaware.com&#x2F;adsb&#x2F;piaware&#x2F;" rel="nofollow">https:&#x2F;&#x2F;flightaware.com&#x2F;adsb&#x2F;piaware&#x2F;</a>

I&#x27;m not OC, but my solution there would be to seek non-Amazon based UI :)

So far I have not found anything broken yet. I think I would go for a whitelist in that case.

How do you deal with it breaking things like Amazon-based UI(Fire, Mobile shopping etc...)?

<a href="https:&#x2F;&#x2F;pi-hole.net" rel="nofollow">https:&#x2F;&#x2F;pi-hole.net</a>. Just installed, very happy so far.

Homeassistant (Hass with mqtt and grafana), Octoprint, MotionEyeOS, pihole, pivpn, Donkey car, Robot operating system (ROS), and a wireless controller for my crazyflie quadcopter

Probably not. Servocity has x-y gimbal controllers. If you can find one small enough, it could control the eye.

Lemme think. A camera that observes the room from the portrait, anyone that walks in is a dot on a plane, and it points the eye at the point on the plane. Should be doable. Yes, the Pi should handle that fairly easily.The part that you&#x27;ll have to figure out is making the eye ball rotate. There are GPIO pins on the Pi, so you can get the commands out, but you&#x27;ll need to build the eyeball component yourself.

If I hadn’t started this startup and had time, I would want to start making this right now

<a href="https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;raspberry_pi&#x2F;comments&#x2F;6y55zw&#x2F;robot_eyes_that_follow_you_around_raspberry_pi_3b&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;raspberry_pi&#x2F;comments&#x2F;6y55zw&#x2F;robot_...</a><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=TLxbPB3CHwQ" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=TLxbPB3CHwQ</a>

Totally possible.
<a href="https:&#x2F;&#x2F;youtu.be&#x2F;0o_9CHYeRvI" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;0o_9CHYeRvI</a>Make it play the Spongebob theme and you’re set.

As a one-eyed individual, I love this idea. I have my old one sitting in a drawer doing nothing and I will be replacing my current this year. Two glass eyes.

I&#x27;m totally naive with Raspberry Pi..can someone comment on the following project: Is it possible to put a glass eye behind a portrait of a one-eyed pirate and make its eye move around&#x2F;follow whoever enters the room? A friend has a glass eye but nothing to do with it.

I&#x27;ve been happy for a year or two (not even sure, now that I think about it...) with two Pi3s running openElec.  Both run over wired ethernet to SMB media server.  I&#x27;m generally stingy with my storage, so I usually opt for the 1080p file sizes.  I don&#x27;t know how well or if it can handle 4K.

Right now: I use it as a Flashrom rig, for flashing BIOS chips.The new Raspberry Pi looks powerful enough to use as a media center PC, I ordered one and want to see if it can do that well enough (read as: I’m curious to see emulation performance.)

Pi-hole, and my home backup target using an external HDD and Samba.

I have a small Internet kiosk for one-off browsing and guests.Currently, mine is running on an ODROID-C2 but the Pi 4 should have more than enough performance for one.My setup is a stripped down install with a minimal window manager. There&#x27;s only one icon for launching Firefox which is configured in an amnesic mode. The DNS is set to my Pi-hole.

We use it as a front end to our Church&#x27;s AV system. It runs a GUI written in Python with PySide that controls our cameras, hyperdeck recorder and vision mixer.It also controls the power switches for the system, and the blinds.

Thanks!A first version of the code is on github:
<a href="https:&#x2F;&#x2F;github.com&#x2F;estiens&#x2F;confessional_booth" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;estiens&#x2F;confessional_booth</a>It was originally part of a confessional booth taken to Burning Man in 2015. Since then it has evolved and become part of my smart home stuff.I was intimidated when I started as it was my first &quot;hardware&quot; project, but the rotary phone part was pretty easy! Just a little switch that turns on and off the number of times of the number dialed basically.It actually has a (new) microphone wired into the mouthpiece and it uses the receiver original speaker ired to the pi sound output.(At the time I knew nothing about Linux so I think getting pulseaudio working correctly took as long as everything else!)Those aren&#x27;t working currently, but eventually I plan to integrate both the rotary dials and voice recognition and &quot;scenes&quot;So like, dial &quot;721&quot; for light control. Voice: &quot;And what are we doing with the lights today...&quot; Me: &quot;Make the outside light purple&quot; and it is done.I have custom voice recongition for things like that working with Mycroft, so it will just be a matter of joining the two projects!

I forgot about Mycroft! Thanks for the reminder!

1) PiHole2) Wired one into a rotary phone to make a weird steampunky smarthouse controller (Dial &#x27;0&#x27; to turn off all downstairs lights and music, etc)3) Various LED controls for fun, and Christmas4) Always experimenting with MycroftAI to stay away from Alexa

I use my Pi2 as a media player (LibreElec), and just ordered a Pi4 4gb which I&#x27;m planning to replace my ageing server and NAS with.

Primarily, an always-on node to run wake-on-lan (via etherwake) on other home network nodes, and to act as an SSH bastion when other entrypoints are failing.

I run minidlna on it to host music. No issues scanning for new files, but IIRC detecting new files was an issue when I ran Plex under docker on it.

I used mine as a dlna server and file server, but I was constantly having to restart it or delete the database to get it to pick up new files I had recently dragged on to it. Has anyone been able to use one successfully for serving media?

I use them as controllers&#x2F;monitors for remotely managing a 3d printer farm. At about $40 total extra per printer for the pi and associated hardware, and an open source utility called &quot;octoprint&quot;, i&#x27;m able to remotely upload, monitor, cancel&#x2F;pause, and have a camera feed to each printer. They also give some additional nice-to-haves by allowing me to upgrade the printer firmware remotely, and get very accurate print completion estimation times.

Using it to run an order scheduling system in store of an automated coffee chain startup we&#x27;re developing.

Mine is running in my attic, hooked up to three antennas on my roof:1. A GPS antenna which provides an accurate “stratum 0” time source. The pi runs ntpd and provides time for all devices on my network.2. A home built ADS-B antenna for receiving position reports from local aircraft and airliners. Interfaces to the pi with a USB SDR. Pi runs dump1090 to provide a web visualization of local air traffic. I also feed FlightAware with this info.3. A home built VHF antenna for listening to airband transmissions. Second SDR. Pi runs scanner software and an IceCast server for clients on my network to connect and listen.The pi also has a temperature sensor that logs once a minute so I can plot my attic’s temperature and I can have it alert me if it gets too hot.

I don&#x27;t use it, I never got around to it because I&#x27;m not actually all that interested in computers, at least not in the sense that I thought I was.

My Raspberry Pi 3 works as a CUPS print server connected to a laser printer, as a pi-hole DNS server to filter ads, and as a ssh entry point (with dynamic DNS). I would use a Pi zero, but Ghostscript is not too happy when printing large documents on a single-core processor with 512 MB of ram. I still have to find the time to set-up a backup server on it (and decide which software to use).

1. I used a Raspberry Pi Zero W to flash Coreboot onto my Lenovo X200.2. I have a 3 B+ running RetroPie.3. I use a model 1 with USB Wi-Fi adapter as a wireless print server for an old LaserJet printer.

I built the RadioInstigator, a mobile SigInt attack platform for around $150.<a href="https:&#x2F;&#x2F;hackaday.com&#x2F;2019&#x2F;06&#x2F;05&#x2F;mobile-sigint-hacking-on-a-civilians-budget&#x2F;" rel="nofollow">https:&#x2F;&#x2F;hackaday.com&#x2F;2019&#x2F;06&#x2F;05&#x2F;mobile-sigint-hacking-on-a-c...</a>If it wasn&#x27;t for F5OEO&#x27;s Rpitx library, I would have been stuck with non-SDR Tx. <a href="https:&#x2F;&#x2F;github.com&#x2F;F5OEO&#x2F;rpitx" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;F5OEO&#x2F;rpitx</a>

Low-cost Aarch64 development machine! I run Aarch64 Fedora on a Pi 3B+ for porting personal projects to Aarch64 and for testing. When mainstream desktop ARM arrives (ARM Macs perhaps?), I’d like to be ready in case I have to make a switch from x86-64.

I&#x27;m building a CarPi. I&#x27;m using a bluetooth OBD-II adapter and Python-OBD to monitor my car&#x27;s diagnostics and record them. I&#x27;m planning on adding a GPS adapter and probably a gyroscope&#x2F;accelerometer so I can track location and motion at the same time.It&#x27;s mostly just for fun.Maybe one day I&#x27;ll add some kind of analysis to it. It might be interesting to track location, motion, and car status in order to predict mileage or if the engine light will turn on.

I used it as a ad hoc game camera last summer (we had something coming through our back yard, so wanted to see what it was, and I won&#x27;t say no to buying more electronics I&#x27;ll use once), but that&#x27;s about it. Been powered off ever since.

Of course. Our system controls electronic latches in the door frame, while the door-bolt is unmodified - so all doors can be opened from inside without any electronics. Additionally there are separate fire-exits from all our rooms.

Please think about failure modes, and don&#x27;t take these guys as an example: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10302686" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10302686</a>

Doorlocks of our hackerspace has been RPi controlled almost since the original RPi came out, maybe 2013. Nowadays we got 4 doors on 3 RPIs (internal and external), with over 200 members that has access. Using MQTT to communicate with our membersystem since 2016 or so.

main pi: pihole and google cloud print 
spare pi: retropie loaded with all the good goodies.

Check out ROckPro64, I just set mine up. Running plex with an internal HDD on a PCIex4, 6 core processor and 4gb ram.  Using Dietpi, I am interested in checking out the Pi 4 as well, but looks like it might be a few months until its available

I used mine as a NAS for a while with an external USB HDD and a samba share. It was also set up to be a VPN and pi-hole. I have a pi zero that I use to flash coreboot on laptops.My PS3 isn&#x27;t doing so hot as a media server client for my NAS&#x27;s movie library - the network connection is poor, the interface is fiddly, and it can&#x27;t load subtitles embedded in files. I was going to buy a pi3 to replace it as a media server client and hook up an external DVD player, but now I&#x27;ll be getting a pi 4!

1. simple server for backup and git repos2. xbmc for videos on main tv3. retropie (I had fun with this for about a week but haven&#x27;t used it lately)4. pihole for blocking ads and time-wasting sites5. various small projects: security camera, motorized window shade, etc.I run Home Assistant on my desktop to communicate with a few of the other devices in the house but I might move that over to a Pi so I don&#x27;t have to worry about restarts and performance. I&#x27;m thinking about consolidating this setup somewhat but I&#x27;m waiting for my next move.

I got a RPi 3B+ to build and test some open-source amateur astronomy tools I contribute to - everything has been working quite nicely so far (I use Fedora on my computers and it also works fine on the Pi). I&#x27;m eyeing the RPi 4 with interest.

I have several Raspberry Pi&#x27;s in use:
- One Zero with AudioQuest Dragonfly for PiMusicBox
- RPI v1 with a camera for motion detection
- RPI v3 for HomeAssistant Hub

Is it HTCPCP-enabled? Inquiring minds want to know!

If you don&#x27;t serve cookies it is okay.

If an EU user tries to make coffee we redirect them to a &quot;this content is unavailable in your region&quot; page so I think we&#x27;re 100% good to go with GDPR compliance.

&gt; gives us a nice record of who is making coffeeIs that allowed by GDPR?

It&#x27;s a Nespresso Lattissima-- the old version where the buttons were physical push-to-press.  We pulled the buttons off and soldered wires to the board inside via a 4-channel relay.

Very similar to what we have in the office as well. The difference is that we are using bluetooth and NFC of the mobile as authentication method.

It doesn&#x27;t write individual orders to the chain.  It could if we funded a wallet to pay the gas to write those records but right now it just does authentication of NFT ownership to grant access, which is conveniently free.  The history logs are stored locally.

Does it record on the blockchain who took the last cup of coffee and didn&#x27;t make more?Everyone in every office would pay good money for that.

The coffee machine in our office is controlled by blockchain NFTs and a Raspberry Pi:Once authenticated, an owner of the NFT can select their coffee type on their phone which then signals the Raspberry Pi to make whatever coffee type was selected by jumping the contacts that used to be pressed by the machine&#x27;s buttons (which have been removed).It&#x27;s a cool gimmick, fun to show off to visitors, gives us a nice record of who is making coffee (since each NFT&#x27;s owner is unique and trackable), limits users to those with the NFT without us having to build usernames&#x2F;passwords, and is also how I make my coffee each afternoon.

Did you do some work to run 100% from ramdisk after boot?  Conventional wisdom says that the SD cards should fail eventually from log writes, etc.

In production since 2016 with 3 x Raspberry Pi 3s. Very reliable - they only need a reboot once a year. These guys are hardcore - processing bursts of thousands of records from a serial interface 24 hours a day 7 days a week and shuffling it off to the cloud.

This makes me sad.Pigeons get a bad time, but they&#x27;re lovely birds of you spend some time observing and maybe even interacting with them. We had an obviously-paired couple visit our balcony most days for a couple of years.Please don&#x27;t be (thoughtlessly?) mean to them.

Would that turret will work for pigeons landing on my balcony?  Or better yet, to protect my air space by squirting them on a fly by?  That&#x27;d be some sweet fun.  :-)

Have you tried laying aluminum foil loosely on the counter? I&#x27;ve heard that one works.I likely won&#x27;t make much progress on it this summer, but in the winter when I pick it back up and make some progress, I&#x27;ll reach out.

I want to follow your turret project :) I&#x27;m trying to teach my cat to stay off the counter and every other method of doing so hasn&#x27;t worked.

I&#x27;ve got 5. I only actively use 3 of them.1. Media player connected to projector running RasPlex - this software is outdated enough and buffers on some high bitrate content that I should buy a replacement device, but it still works well enough. I tried upgrading to a newer raspi and wasted an hour trying to get it to run, then gave up. So, I still use my old one. It still gets used daily and works well enough (only issue is the buffering on occasion).2. RetroPie - I rarely game, but it&#x27;s cool to be able to turn this on and have a library of all the games I played (and those I never had) from childhood.3. I use the third one as a networked LED marquee controller (HUB75 panels) with this software: <a href="https:&#x2F;&#x2F;github.com&#x2F;hzeller&#x2F;rpi-rgb-led-matrix" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;hzeller&#x2F;rpi-rgb-led-matrix</a>The other 2 I just have sitting on my desk and occasionally use for small dev projects or to test out some new project I read about on here, hackaday, etc.An ongoing project that I haven&#x27;t made much progress with is an automated turret that squirts squirrels with water. I made something similar in college (a &quot;paintball gun&quot; turret with openCV blob detection&#x2F;tracking) that had decent performance. Now that openCV on rpi can outperform my old college laptop, I want to setup the pi to detect squirrels, track them, and keep them away from a bird feeder&#x2F;plants in my backyard.

I have three always onOne Pi3B+ connected to anemometer and single solar cell, uploads up to 60 secs of analog data reading every minute by CRON, then has other CROn stuff for emailingOne Pi Zero for home security camera attached to motion sensor&#x2F;rapid shutter mode, uploads to S3 bucketOne Pi zero for reading HN news out loud in the morning by Amazon Polly, tracking solar cells on window, and then more scheduling stuffI have another one powered by USB, I intend to use it as &quot;swappable dev stacks by sd card&quot; through USB SSH

I have a few.1) PiHole. I&#x27;m upgrading this to a RasPi4 and seeing if I can also merge 2) 5) and 6) into it.2) NAS&#x2F;VPN&#x2F;Media Server&#x2F;Hass.io3) RTL-SDR for ADS-B Receiver feeding to numerous data warehouses (Flightaware, ADS-B Exchange, PlaneFinder, etc)4) Connected to RTL-SDR and running rtltcp for generic HF&#x2F;VHF&#x2F;UHF radio receiving which was previously part of a SATNOGS automatic cubesat&#x2F;Amsat&#x2F;ISS receiver build I&#x27;ve not completed yet.5) Debian desktop on my workbench6) A Pi Zero W running a ZNC IRC bouncer7) Experimenting with remote ham radio control but linux-based ham radio software is still a bit too frustrating, so this isn&#x27;t an active project.8) Two extra RasPis and three PiZeroW&#x27;s just lying around because Microcenter always has them for ridiculously low prices.

Using one for a DMR (ham radio) hotspot.Plan on using one for a GPSDO data monitoring.The problem with the RPi is the SD card file system. It’s just not reliable enough. I have had better luck with the Beaglebone Black, which as on-board eMMC.

I use it to control my 3D printer: <a href="https:&#x2F;&#x2F;octoprint.org&#x2F;" rel="nofollow">https:&#x2F;&#x2F;octoprint.org&#x2F;</a>

I am using The Pi for1) video security system using zoneminder2) text and email me alerts3) Automate lights&#x2F;devices using 433MHz RF sockets, crontab and RF433Utils4) A cloud storage for my files using owncloud

I build an RC (with the goal of making it autonomous) car. I got as far as giving it edge detection: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=r-o8Uzi5o1k" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=r-o8Uzi5o1k</a> but haven&#x27;t continued the project. It&#x27;s a great platform for exploring controlling hardware and prototyping ideas!

1. Trello displays in conference rooms.2. Admin terminal that sits on my desk.

I just set up pi-hole on one this weekend. It was my first time trying a Raspberry Pi, and I loved it. With the news about the latest version and the improved specs, I&#x27;m considering setting up a couple to replace my kids&#x27; computers, which are all old and under-powered.

Hi can you share more details on the kids desktop setup? What applications do you use?

1 - Kids&#x27; desktop (Raspi3)
2 - Kodi (Raspi2)
3 - LAN print&#x2F;automated backup server (Raspi1)I&#x27;ve order a 4GB Raspi4 to upgrade the kids&#x27; desktop and 1 GB Raspi4 to upgrade the automated backup server (Gb ethernet + USB3!). Kodi will get the old kids&#x27; desktop.

Tracking aircraft within radio range and feeding data to ADSB Exchange and Flightaware.

I run a Newsreader server. It collects news from many hundreds of places and at any time offers a beautiful timeline view for all my screen devices: <a href="https:&#x2F;&#x2F;www.raspberrypi.org&#x2F;forums&#x2F;viewtopic.php?f=41&amp;t=238133" rel="nofollow">https:&#x2F;&#x2F;www.raspberrypi.org&#x2F;forums&#x2F;viewtopic.php?f=41&amp;t=2381...</a>

I&#x27;ve been using the docker version of pihole for a few years now<a href="https:&#x2F;&#x2F;github.com&#x2F;pi-hole&#x2F;docker-pi-hole" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;pi-hole&#x2F;docker-pi-hole</a>It made the setup process really very simple for me

PiHole service is the only project I run on my raspberry pi. Setup is not as user friendly as we are accustomed to these days, however, with a few hours you will have a robust ad&#x2F;analytics block system in place.

I use one to control a 3D printer with <a href="https:&#x2F;&#x2F;octoprint.org" rel="nofollow">https:&#x2F;&#x2F;octoprint.org</a> and another to integrate some smart home devices that are not homekit compatible with my homekit setup, using <a href="https:&#x2F;&#x2F;homebridge.io" rel="nofollow">https:&#x2F;&#x2F;homebridge.io</a>.

1. pihole and unifi cloud key (not pleased that this is a requirement, but glad i can run it alongside my pihole)2. retropie3. commodore64 disk drive emulator! [1][1] <a href="https:&#x2F;&#x2F;cbm-pi1541.firebaseapp.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;cbm-pi1541.firebaseapp.com&#x2F;</a>

Vanilla. It’s so-so performance wise. A raspberry pi 2 has been good enough for our 6 player games. Newer models I’m sure would perform better.

How does it perform as a Minecraft server? Do you use any mods or just vanilla?

retropie, pi-hole and running misc temporary servers like minecraft

Zabbix Proxy
<a href="https:&#x2F;&#x2F;youtu.be&#x2F;i2b1DfscSqo" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;i2b1DfscSqo</a>

No write up unfortunately, I actually made it a few years ago as I was getting a lot of recruiter spam calls, but ever since the GDPR came in that has stopped. I don&#x27;t receive that many calls these days.I have my (cell) phones voicemail set to my Twilio number. When a voicemail request hits Twilio, it calls an endpoint hosted on my Pi, which then just calls the Twilio APIs to1. tell the caller to leave a message after the beep2. record the message3. use the speech-to-text API to transcribe the message4. send me an SMS message with the transcriptionIt&#x27;s really just an ersatz visual&#x2F;text voicemail service that I think iPhone users get. Also the Twilio speech-to-text transcriptions are hilariously bad, I don&#x27;t think it copes well with UK accents :)

You can actually do voicemail within Twilio for free using their TwiML Bins and Functions, you don’t need any extra hardware to maintain.Just did this for a couple of numbers I set up with SIP. The docs were... confusing and inaccurate but I finally got it to work.

Do you have any more information or a write up on what you&#x27;re doing with Twilio and voicemail? That sounds sort of interesting.

I have 3 running right now1x Raspberry Pi model B (from 2012!) - runs a reverse proxy to things in my local network, and runs a dynamic DNS service. It&#x27;s showing its age as its ARMv6 and I guess at some point updates won&#x27;t be as frequent so will eventually have to retire it, but it works fine for now.1x Pi model 3 - runs various services, inc. GOGS a private git server, ZNC, a service to control my TV, a service to control my &#x27;smart plug&#x27; lamp through a private API, a private docker registry, a voicemail system connected to Twilio1x Pi model 3 - running Pi-Hole and wireguardI love all of them very dearly and looking forward to reading this thread!

Quadcopter pet project <a href="https:&#x2F;&#x2F;github.com&#x2F;castis&#x2F;currant" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;castis&#x2F;currant</a>One for running Retropie <a href="https:&#x2F;&#x2F;emulationstation.org&#x2F;gettingstarted.html#install_rpi_retropie" rel="nofollow">https:&#x2F;&#x2F;emulationstation.org&#x2F;gettingstarted.html#install_rpi...</a>.Next one is for playing with <a href="https:&#x2F;&#x2F;www.zoneminder.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.zoneminder.com&#x2F;</a>

I don&#x27;t see why, its just neat to have a little dedicated device next to your router IMO.

Not at all.  I run the service in a VM on a windows server.

A filtering DNS server is much easier to add into your network - don&#x27;t have to play with proxy autoconfig, and because it&#x27;s not mucking with the http content, very lightweight.

I still don&#x27;t understand how pi-hole became so popular whereas privoxy didn&#x27;t

Energy use, probably. I bet the RPi uses a ton less energy than your linux server. But in this case that&#x27;s not really a tradeoff since you&#x27;d be running your server in addition to the RPi.

A lot of folks have said &quot;pihole&quot;. I have a linux server at home that does my DNS and a bunch of other stuff. I also have a pi3 still in the box.Would there be an advantage to me running pihole on the pi3 instead of on my linux server?

I have 5 or more in my house, some bought, some inherited. One of them runs pi-hole. I&#x27;m in the middle of setting up octopi for a new 3d printer on another one. Two of the others are pi zeros (no wireless), no plan for those any time soon. I also have one of the older models, RCA video output instead of HDMI. I&#x27;m not sure I&#x27;ll ever find a use for that one.

This is a cool project I was completely unaware of.

Doing this as well as we speak! Also using a Pi as a RetroPi.

I&#x27;m using a Raspberry Pi (Gen 1, Model B I think) to run a smart mirror. It pulls up my daily commute, news headlines, weather, and calendar. I take no credit for the software (<a href="https:&#x2F;&#x2F;github.com&#x2F;MichMich&#x2F;MagicMirror" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;MichMich&#x2F;MagicMirror</a>)I also had one connected to my Motorola LapDock back in 2012 to run a portable raspbian laptop. It worked surprisingly well.

Mine drives an LED pixel frame in my living room: <a href="https:&#x2F;&#x2F;www.instagram.com&#x2F;p&#x2F;BIgFP9dhkPZ&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.instagram.com&#x2F;p&#x2F;BIgFP9dhkPZ&#x2F;</a>

I have a script that retrieve photos from an attached camera and then uploads the images to an AWS GPU instance and train an image recognition model there. This is all for controlling my model trains :-)

Have any of you done something with machine learning on rpi? Like face recognition or some fun robot. I&#x27;m looking at rpi4+google coral and it seems impressive enough to run interesting projects.

A bunch:
- Ubiquiti network controller, Pi Hole
- Temperature controller to knit an ancient hydronic in floor heater and a new-ish mini split together to act in unison. Pings local national weather stations to get more accurate data than I care to replicate at my home.
- Octoprint for my 3d printer
- 4x for a hobby project stitching together video from multiple cameras

It was bought with the intention of using it as an emulator for old games, but it just sits unused in a closet.

I use it as a visualization server for my research!

Boo! Might have to reconsider then. I used the Pi Zero W for FullPageOS for a while but performance was absolutely terrible, recently switched it out with the Raspberry Pi 3.The Pi Zero really has an awesome form factor, but many of the projects I come up with either require more performance (i.e. needing a Rasperry Pi 3) or are simply better suited for a microcontroller such an ESP32 or ESP8266.

When I used my Pi 3b+ it was flakey for UniFi. I bought a bunch of their cameras and got a cloud key gen 2 plus.  Haven’t looked back and now I have a Pi for a few other things in my new house.

Seconding this... it&#x27;ll just barely run on the Zero W, but you need 64-bit Java to remotely access your controller through unifi.ubnt.com, and there&#x27;ll be long delays whenever the database needs any maintenance.(I set up a Zero with the Unifi Controller -- connecting to the LAN using a Chromecast Ethernet Adaptor -- about a year ago, and had this problem, so I switched to a 3B, and all is well now.)

FYI - I had to buy a Pi 3B+ to run Unifi Controller, the forum posts said the Zero W didn&#x27;t have enough juice.

I didn&#x27;t know about FullPageOS, very cool. For a full stack web developer, this can give you a wide range of use cases for a Pi. Thanks!

Seconded. Please tell us more.I believe Ford has some open stuff you can connect a laptop to.

I am not the person you asked but some ideas, in order of most complexity&#x2F;cost to least.- Some kind of CAN bus hack. They exist.- He has a ford and hardware that can interact with openXC CAN2-2 see here: <a href="http:&#x2F;&#x2F;openxcplatform.com&#x2F;vehicle-interface&#x2F;hardware.html" rel="nofollow">http:&#x2F;&#x2F;openxcplatform.com&#x2F;vehicle-interface&#x2F;hardware.html</a>- He&#x27;s using bluetooth.

&gt; 1x Raspberry Pi 3 installed in my car within the internal network as a bastion box and to run software that let&#x27;s my interact with the entertainment systemCan you go in more depth about this? How did you integrate it with the entertainment system, and what do specifically do you do with it?

Unifi controller on a pi zero might be a bit painful on the memory front. It wants the controller (java app) and mongo, both of which like to eat up memory.

I found it easier to just buy the cloud key...

It is a nightmare! I just finished fighting with it this weekend.The controller only officially supports ARM 32, and the mongoDB dependency only supports ARM 64.In the end I I used a 64-bit Ubuntu, 64-bit mongoDB from the mongoDB repo, and downloaded the controller deb from the Unify site, which is apparently architect agnostic.

Take a look at Hostifi if you want your own server at a reasonable cost without having to deal with the management.

&gt; Next project: 1x Raspberry Pi Zero W to run Unifi ControllerUgh, have fun with the dependency issues. An easy alternative is to run a Unifi docker image. Currently running it from a Debian VM when needed but looking to move it to an alpine vmm on my OpenBSD APU2. The Linux image is the same as the cloud key so you can roll your own cloud key and use the unifi app.Here is the image I use though there are others: <a href="https:&#x2F;&#x2F;hub.docker.com&#x2F;r&#x2F;jacobalberty&#x2F;unifi&#x2F;" rel="nofollow">https:&#x2F;&#x2F;hub.docker.com&#x2F;r&#x2F;jacobalberty&#x2F;unifi&#x2F;</a>

You’re clearly better at this than me, so this might be unneeded: Docking the UniFi Controller avoids the dependency hell and upgrade pain that sometimes occurs, and makes an afternoons pain into a 5 minute exercise.

1x Raspberry Pi 3 installed in my car within the internal network as a bastion box and to run software that let&#x27;s my interact with the entertainment system1x Raspberry Pi 3 running Home Assistant with a Z-Wave USB Dongle (Home Automation)1x Raspberry Pi 3 running OctoPrint (Host&#x2F;remote-control for 3D Printer)1x Raspberry Pi 3 running FullPageOS (Full-screen Chromium in kiosk mode) displaying a server statusboard in our home officeNext project: 1x Raspberry Pi Zero W to run Unifi ControllerI have a couple of original Model B+ sitting around unused right now - just not powerful enough for any of the above projects.(Update: Formatting)

Mine is running Hypriot OS (<a href="https:&#x2F;&#x2F;blog.hypriot.com" rel="nofollow">https:&#x2F;&#x2F;blog.hypriot.com</a>): Everything on it is dockerized.The coolest application: An Airconnect container (<a href="https:&#x2F;&#x2F;github.com&#x2F;philippe44&#x2F;AirConnect" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;philippe44&#x2F;AirConnect</a>) which upgrades my mediocre Internet radio device with AirPlay.

I use it for a personal project implying scraping some websites. One of these websites was behind Cloudflare (I think), and thus was blocking request from my OVH server. Therefore I used my Raspberry to do the job, on my own connection.
I also put recently a Pi-hole on it.

1. A raspberry pi 3 on which I use git-annex to archive data on a bunch of large USB disks.2. A raspberry pi 2 at a different location which provides off-site backups for the data archived by the first pi3. A raspberry pi zero to run magic mirror on a leftover screen (I cannot be bothered to turn it into an actual smart mirror though)4. And I recently added another raspberry pi 3 to play with RetroPie

1. Retropie
2. Pi-hole
3. Bluetooth presence detection
4. Previously ran a Hassio instance on one
5. Wireguard server
6. (HiFiBerry + Volumio) x 3great for multi room sonos-like system

Thanks for asking! I haven&#x27;t documented it anywhere, and the source code isn&#x27;t suitable for consumption by others. But, I can tell you about the basics.I bought a &quot;12V&quot; LED strip intended for automotive use, and created a simple circuit with a +12V DC supply and an NPN transistor. By hooking the NPN transistor to a PWM output on the Pi&#x27;s I&#x2F;O (via a resistor), I can control the LEDs from nearly full darkness to their maximum brightness. Here&#x27;s a tutorial that covers the same ground: <a href="https:&#x2F;&#x2F;dordnung.de&#x2F;raspberrypi-ledstrip&#x2F;" rel="nofollow">https:&#x2F;&#x2F;dordnung.de&#x2F;raspberrypi-ledstrip&#x2F;</a>There&#x27;s also a switch for &quot;disable alarm no matter what&quot; and &quot;turn light on&#x2F;off right now&quot;. (I also use it as a nighttime reading lamp, with the added bonus that it starts ramping down the brightness after about 25 minutes and turns off after 30: a good reminder to go the f--- to bed)This all hooks to some not very interesting software to listen to the buttons, carry out an alarm schedule, ramp the LED intensity up and down, and so forth. In my case, it&#x27;s written all in Python in a sort of timer-and-event-driven style.Since this pi has wifi, one part of a traditional alarm clock is missing: it sets the time from NTP and applies the standard DST rules to obey summer time; there are no controls to set the time, and even after a midnight power outage it&#x27;ll generally alarm at the right time in the morning, as long as power came on at least a few minutes before the appointed minute.I&#x27;ve had a number of variations on homebrew light alarm over the years, AVRs and arduinos, TRIACs switching standard incandescent lamps, RGB LEDs simulating the sunrise color sequence, etc. It&#x27;s the sort of project you can always do again and explore more of the problem space and find what works best for you.

I&#x27;m interested in learning more about your LED light alarm set up—I had a similar idea a while back but am less familiar with the world of Raspberry Pi.

- LED Light alarm- Living room music player &amp; &quot;radio&quot; streamer -- I need to set this up as an A2DP audio receiver too- octoprint server- Stratum 1 NTP server (GPS referenced)If I didn&#x27;t also have a &quot;big&quot; linux system running 24&#x2F;7, it would be doing things like DHCP, DNS, MQTT server, etc.

I wrote up a Medium post about what I do with mine: <a href="https:&#x2F;&#x2F;medium.com&#x2F;@adamargo&#x2F;how-i-use-raspberry-pis-for-homekit-automation-ed69df8d8be7" rel="nofollow">https:&#x2F;&#x2F;medium.com&#x2F;@adamargo&#x2F;how-i-use-raspberry-pis-for-hom...</a>Mostly home automation.
1x homebridge server, ffmpeg transcoder for security cameras,
1x for controlling an electric fireplace using an IR shield and power monitoring outlet,
1x for controlling model train switches and bridging that into HomeKit

There was a time I was super into a project where I had a streaming server that used my Spotify account and would allow anyone with access to the server to change the song. I was basically trying to replicate what Sonos does with a Pi. It worked, but I abandoned it after a few months of not using it.

I&#x27;m not really using one regularly right now, but here are the few things I&#x27;ve done with my Pis:- Hosted a blog using Rails and a Cron that updated the A record on my Route53 domain to point to my local IP address. I&#x27;m not sure anyone ever read it, but I had it up for about a year.- Attempted to reverse engineer a treadmill controller with the UART pins. I successfully figured out the baud rate and captured bytes, but never figured out how to control the treadmill motor board. I have a feeling the motor board had a problem.- Connected a piezo element to GPIO and made a controllable alarm device.Nothing that cool, really.

I have 3 use cases for my RPi:-PiHole as an ad&#x2F;tracking blocker (adding PiVPN tonight to VPN into my home network)-Plugging sensors to measure temp&#x2F;humidity and controlling AC state (on&#x2F;off) via IR Led (<a href="https:&#x2F;&#x2F;imgur.com&#x2F;a&#x2F;pYugqXz" rel="nofollow">https:&#x2F;&#x2F;imgur.com&#x2F;a&#x2F;pYugqXz</a>)-Unifi Controller

Two things, working on more. VPN router and a doorbell to desktop-notifications box. I like listening to music on noise cancelling headphones sometimes when I work. I wouldn&#x27;t hear the doorbell in that case, so I have a pi with a mic that sits close to the doorbell. If the noise level goes past a certain threshold for a few samples, it sends a command to my workstation where a script sits and triggers a desktop notification. Works pretty well with very few false positives and all &quot;I might miss the package delivery guy&quot; anxiety is gone while I enjoy music.

A PR agency that hacks NASA to boost your product launch, sign me up! ;o)

thats not a coincidence. That&#x27;s a well coordinated product launch with a good PR agency doing it&#x27;s job

Coincidentally there’s another story on the front page about using a Raspberry Pi to hack NASA: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=20264774" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=20264774</a>

This project shows some $8 sensors: 
<a href="http:&#x2F;&#x2F;www.the-diy-life.com&#x2F;simple-arduino-home-energy-meter&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.the-diy-life.com&#x2F;simple-arduino-home-energy-meter...</a>

1x House power monitor
1x Solar power monitor
1x DVBT airplane tracking (flightradar.com)
1x Fridge temperature and humidity graphing for Salami chamber
1x Pi-hole (I also run a second pi-hole on a VM)

Yes - the sensors are a bit expensive at about US$ 90 apiece but as I explained in another comment, I think that it has paid for itself

You can get cheap NDIR based sensors from aliexpress (around $20) such as MH-Z14A, which I&#x27;ve used with a Pi, via the UART interface.  I just hooked it up to the 5V line on the Pi pin header and then used the Pis UART lines for the data, as that runs at 3.3V.

What sensor did you use? All the ones I’ve seen tend to be pretty expensive

This is the sensor that I&#x27;m using: <a href="https:&#x2F;&#x2F;www.co2meter.com&#x2F;collections&#x2F;desktop&#x2F;products&#x2F;co2mini-co2-indoor-air-quality-monitor" rel="nofollow">https:&#x2F;&#x2F;www.co2meter.com&#x2F;collections&#x2F;desktop&#x2F;products&#x2F;co2min...</a>

I am also interested in your CO2 sensor. What kind of CO2 sensor?

I have been using Home Assistant to integrate everything. I have Google flavored, but it also has HomeKit support.<a href="https:&#x2F;&#x2F;www.home-assistant.io&#x2F;components&#x2F;homekit&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.home-assistant.io&#x2F;components&#x2F;homekit&#x2F;</a>

I&#x27;m interested in this too. It would be even cooler to link these CO2 sensors into Apple&#x27;s HomeKit somehow...

I had a suspicion that winter-time headaches we were having might be triggered by high CO2 levels so I simply wanted to record the CO2 levels in different rooms. Thanks to the sensors, I did, in fact, find that CO2 levels were very high in our bedroom. Once I improved ventilation, things seem to have gotten better.

I&#x27;m also interested, although my curiosity is more about what you are doing with the data.Just storage? Some sort of charting? Graphite? Maybe some other data monitoring tool? Maybe something custom?

This would be a good application for a Pi Zero W (with WiFi) - if you want to collect the data in a central location. I&#x27;ve linked the CO2 sensor I used in another comment.

I like this! I&#x27;m already using Pi Zero&#x27;s like this for temperature sensing; adding a CO2 sensor sounds like a good enhancement!

CH4 is also dangerous. It&#x27;s a different problem. CH4 blows up your house and is very rare. CO kills you and is very rare. CO2 buildup causes mild issues (like headaches, sleepiness) but is very common.

I think CO is more dangerous than CO2! Why not CO?

Using several Raspberry Pis to monitor CO2 levels in my house. Each Raspberry Pi has a CO2 sensor - wrote a little Python script to retrieve data from sensor and upload it to a server Which is also a Raspberry Pi.

I run Pi-hole off a RPi Zero W on my local network. Set it up over Ethernet with a bit of cron automation [0] and later expanded Gravity (the blocklist) along with firewall NAT rules to redirect all DNS queries to go through the Pi-hole [1].[0]: <a href="https:&#x2F;&#x2F;paul.af&#x2F;adding-pi-hole-to-my-local-network" rel="nofollow">https:&#x2F;&#x2F;paul.af&#x2F;adding-pi-hole-to-my-local-network</a>[1]: <a href="https:&#x2F;&#x2F;paul.af&#x2F;pi-hole-revisited" rel="nofollow">https:&#x2F;&#x2F;paul.af&#x2F;pi-hole-revisited</a>

It&#x27;s basically a Pi, a buck regulator, a tiny COB USB audio interface and an SSD1306-based 128x32 display. Removed all connectors and replaced them with soldered wires so it packs neatly into a tiny box.The software is all custom and written in C, using Jack for low latency audio and my own driver for the display (Adafruit makes a Python driver but it eats half of your CPU and is not optimized for i2c bandwidth or high framerates).

I have been thinking about doing something similar -- would love to hear more about this if possible!

I built a guitar stomp box using a Raspberry Pi Zero to trigger samples with a foot switch. Runs on 9 volts and has a very bright OLED display so I can still see what it&#x27;s doing when I&#x27;m playing in a dark venue.

- WiFi garage door controller
 - OSMC x 2
 - StratuxI had PiHole, but moved it to a tiny VM in an effort to minimize cables.

I use one as a hub&#x2F;gateway for untrusted IoT devices.It hosts a separate, isolated wifi network via hostaod&#x2F;dnsmasq. Clients aren&#x27;t given routes to the primary network or the broader internet - they should only see the Pi and other clients (I&#x27;d eventually like to restrict access to other clients as well, but haven&#x27;t played with that yet).Access to the devices is via a web server running on the Pi that relays commands and responses. Right now it&#x27;s a page full of hard-coded buttons and indicators, but I eventually want to turn it into a flexible firewall-like system to make it easier to add&#x2F;configure&#x2F;remove clients and rules.

I use mine to run and monitor my 3D printer remotely. I use octopi and the little webcam extension.Since I have a permanent use for it now, I&#x27;ll probably be buying a second to play around with.

Meat curing fridge, plant watering system, LiDAR controllers on my truck

I have one hooked up to my TV on an HDMI port to display all my home surveillance cameras in a grid. Works with any cameras that support RTSP.<a href="https:&#x2F;&#x2F;selfhostedhome.com&#x2F;raspberry-pi-video-surveillance-monitor&#x2F;" rel="nofollow">https:&#x2F;&#x2F;selfhostedhome.com&#x2F;raspberry-pi-video-surveillance-m...</a>

Fortigate is pretty configurable. I’d be really surprised if it couldn’t do site to site or site to client with a little configuration.

I&#x27;d be more interested if wireguard is an option, and how it performs. Since they&#x27;re already on linux&#x2F;oss.

You can absolutely configure IPSec tunnels on Fortinet.Can I ask, do you perform updates and maintenance on these boxes? How do they perform in terms of throughput with openvpn?

A client that I&#x27;m consulting was being ripped off by a local IT provider with pricing for on-premises servers &amp; MS software.
I proceeded to rent cheaper equivalent machines off-site.
The IT provider claimed the hardware firewall (Fortigate) was not configurable for site-to-site to the new machines directly (could be, not an expert on those).
Therefore, I ended up purchasing several Raspberries and configuring them as OpenVPN routers that opened up the office LAN to said machines. 
Quite satisfying, as it allowed to break the client out of the proprietry software&#x2F;hardware&#x2F;vendor chain at a rather small expense.

You got a &#x27;&gt;&#x27; as part of the URL, which goes 404! Just removing it should do.

Thanks!&gt; Is there any way to test it without rpi&#x2F;camera?Without a Raspberry Pi, yes. It should run on any Unix-like OS. I&#x27;ve tested Linux&#x2F;arm32, Linux&#x2F;x86-64, and macOS&#x2F;x86-64. (For the last, install ffmpeg via homebrew first.)Without an IP camera...hmm, there are probably some public RTSP live streams somewhere. Not sure offhand.&gt; If I understand the readme correctly, you store frames individually (as jpegs?) on disk and construct flexible mp4 streams on the fly. Naturally I would have assumed that this would be inefficient so I’m wondering if I got this right, not very familiar with stream&#x2F;video&#x2F;codec techNo, I store the video stream in the compressed form the camera gave it to me. Currently that&#x27;s H.264; it wouldn&#x27;t be hard to add H.265 support as well. I break it apart into roughly one-minute segments at convenient locations. The schema design doc talks about that here: <a href="https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr&#x2F;blob&#x2F;master&#x2F;design&#x2F;schema.md" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr&#x2F;blob&#x2F;master&#x2F;design...</a>.mp4 serving will aggregate those together (maybe clipping the start and end segment) to give you a .mp4 segment for any time range of interest. It comes up with a mp4::File struct which knows what video segments to serve and maps byte locations to parts of the .mp4 container format. I don&#x27;t have a good doc about how this works other than the source code right now. <a href="https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr&#x2F;blob&#x2F;master&#x2F;src&#x2F;mp4.rs" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr&#x2F;blob&#x2F;master&#x2F;src&#x2F;mp...</a> [edit: and you probably won&#x27;t be successful in understanding it without having a pdf of the ISO&#x2F;IEC 14496-12 specification open next to it.] Here&#x27;s some debug output for generating a five-minute video segment: <a href="https:&#x2F;&#x2F;pastebin.com&#x2F;Wzfz7BF7" rel="nofollow">https:&#x2F;&#x2F;pastebin.com&#x2F;Wzfz7BF7</a>Storing individual frames as jpegs would be inefficient I agree in all sorts of ways: recording CPU (you have to decode the H.264 and re-encode it as JPEGs), disk space, disk seeks, playback bandwidth, browser CPU, etc. My understanding is this is how Zoneminder currently works. I imagine it worked better with the cameras Zoneminder was originally designed for: low-resolution, low-qps webcams that didn&#x27;t do their own H.264 encoding.

Moonfire NVR looks like an amazing project that I can learn a lot from for an entirely different project with streams and stuff that I’m interested in and have zero experience with!Also great that it’s written in rustIs there any way to test it without rpi&#x2F;camera?If I understand the readme correctly, you store frames individually (as jpegs?) on disk and construct flexible mp4 streams on the fly. Naturally I would have assumed that this would be inefficient so I’m wondering if I got this right, not very familiar with stream&#x2F;video&#x2F;codec tech

I have a Dahua IPC-HDW5231R-Z that&#x27;s worked quite well for me. But I haven&#x27;t tried a lot of cameras, and your needs and budget may vary, so look at the ipcamtalk cliff notes: <a href="https:&#x2F;&#x2F;ipcamtalk.com&#x2F;wiki&#x2F;ip-cam-talk-cliff-notes&#x2F;" rel="nofollow">https:&#x2F;&#x2F;ipcamtalk.com&#x2F;wiki&#x2F;ip-cam-talk-cliff-notes&#x2F;</a>

I&#x27;ve been looking for something like Moonfire!  Do you have any recommendations for an outdoor camera, I was looking at Lorex but don&#x27;t have much experience?  Thanks!

It doesn&#x27;t do enough work today to require that, given that it&#x27;s meant for home use and doesn&#x27;t decode&#x2F;re-encode the video. One Raspberry Pi 4 with a couple 6 TB drives in an external USB3 SATA enclosure should be sufficient for 16+ cameras in terms of CPU, USB3 bandwidth, Ethernet bandwidth, spindle time, storage capacity, etc. If for some reason you need more security cameras than that in your home, you can probably afford a single machine beefy enough to handle it.The only thing I anticipate being a significant performance challenge is on-NVR motion detection. Most likely that will end up being separate processes that download the video and annotate it via the HTTP API. Those workers could then run on separate machines if needed. The primary machine would have sufficient bandwidth to support this.

I need to dig into this later, but one suggestion is to put your video chunker in a separate process, this way you can scale across multiple nodes.

My plan is to extend the HTTP API [1] with an event stream [2] that can be accessed via https-with-a-session-cookie or http-over-Unix-domain-socket. It could be used by browser-based Javascript, mobile clients, and automated event subscribers. One could write a subscriber that launches a subprocess or runs scripts in-process. I think there are a few advantages over doing this directly from the main process:* it keeps the main process logic minimal. This API is needed anyway to make a good web interface.* it&#x27;s the easiest way to have nothing else run as the same Unix user as the main process. My design is similar to a DBMS in that that you should only ever be accessing Moonfire NVR&#x27;s data through its interfaces (except for development or emergency maintenance purposes). Having a dedicated user helps enforce that.* your script can run on a separate machine if desiredAlso a couple disadvantages:* two services to set up (main process + subscriber) instead of one.* there&#x27;s the possibility that an event happens while the main process is running but your subscriber is disconnected, so the event gets committed to the database but you never see it. The easiest thing to do is to accept skipping these (as would happen anyway if the main process is down). Or the main process could buffer events for a while. Or the watcher could have logic to &quot;catch up&quot; (which unfortunately means not only more complex logic but also keeping state somehow).If you&#x27;d prefer another approach or want it sooner than I&#x27;m likely to implement it, please contribute! I have my priorities &amp; design ideas, but if you chip in, you get a say in both. And I go pretty slowly on my own anyway, so if you&#x27;re able, it&#x27;s worth chipping in even if you agree with me about everything.[1] <a href="https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr&#x2F;blob&#x2F;master&#x2F;design&#x2F;api.md" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr&#x2F;blob&#x2F;master&#x2F;design...</a>
[2] <a href="https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr&#x2F;issues&#x2F;40" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr&#x2F;issues&#x2F;40</a>

I&#x27;ve wanted some security cam software to run on a Pi for ages because the stuff shipped on my IP cameras is awful. Do you have any plans to offer a callback system, e.g. so when some customisable event happens (change detection, perhaps between certain hours of the day&#x2F;night) it could then callback to a custom script for further processing?

A security camera NVR. (Help wanted! I&#x27;m developing it here: <a href="https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;scottlamb&#x2F;moonfire-nvr</a> I&#x27;m proud of the design but it&#x27;s still far from a polished system that does everything a reasonable person would expect. Lots of opportunities to extend it if you&#x27;re looking for a fun Rust + Javascript project.) A Raspberry Pi 2 will run a working setup; the new Raspberry Pi 4 should be a lot more pleasant in terms of being able to recompile it in a reasonable time, transfer video segments quickly, etc. I think the biggest missing piece is a real-time clock. Faster flash, builtin SATA, and a builtin NPU would also be great of course but not realistic for $35.A home theater control system. The Pi uses HDMI-CEC, my Samsung TV&#x27;s EXLINK (their protocol over RS-232), Roku&#x27;s HTTP interface, etc. and an Android app is the frontend. I wanted to make this into a nice polished thing other people could use but have given up on the idea for now. The thing is that media components are super finicky, many things need special support written just for them, and you really have to extensively tweak them to see how they function as a whole. (eg does your TV turn off your stereo receiver when it turns off itself. The answer varies based on the model and settings of both components.) HDMI-CEC doesn&#x27;t live up to its potential in this regard.[edit: fixed hyperlink]

I have Raspberry Pi and I mainly use it for VPN and piHole. I’m curious if you have one, have you found it useful? What do you do with your Raspberry Pi?

Ask HN: What do you do with your Raspberry Pi?