I have one setup in a Raspberry Pi 400 for when I travel - it's configured as a wireguard peer back to inside my home network so any devices I connect to it are being routed securely to there before out to the internet (and I can also access my network from the road, including backups and media).

udptunnel did the job, although I had to tether off my phone to get the server up and running.

https://imgur.com/a/AVxuR0d

Im honestly considering deploying these at work to replace some aging (and expensive) dell, java based ipkvms. I like it enough i made a second one to attach to a small headless desktop. Mainly just as a cheap quasi-OOB management.

Mine use h.264/webrtc or html5/mjpeg and on one i even hooked it up to a smaller kvm to give me a 4 port switcher via the webUI. Pretty slick and all told was under $400 for a 4-port model. A single pikvm, including the case and everything was about 100 bucks.

With some systems (ie: supermicro) and a ribbon cable, you could rig up ATX controls as well.

The main issue I see with it is that it would need to connect to multiple host USBs and only one client.

1 - I actually don't miss it anymore because I'm not in a situation to use it, but I used to miss it.

In this case. Its basically a single USB cable and a HDMI/Video cable.

All the Mouse/Keyboard etc is emulated through USB. Which is pretty nice. That was the best part for me. And with modern standards the lag was noticeable, but minimal. That said, in my cases, im just using SSH or something anyway. This was more for outage situations, or in a situation where i need to make a BIOS change remotely etc.

It should be able to build a device where you use an extra USB for each server plus one network cable for each 4, 8, whatever (if you push it, your entire hack).

To use it, you would SSH into the pi, and use a command to get a server.

The serial interface is quite old, everything tends to be accessible there. But now that you mentioned, I'm not sure you can update the BIOS with it.

https://docs.pikvm.org/usb_serial/

Or in the case of how I did it, i setup a multi-port KVM, that allowed me to manage x number of devices (with video) from a single unit. In this instance, a serial connection was used from the pi to the actual KVM which allowed me to switch inputs etc, from the gui.

https://docs.pikvm.org/multiport/

https://docs.pikvm.org/ezcoo/

https://docs.pikvm.org/multiport/

https://github.com/merbanan/rtl_433

Out of curiosity: why did you decide to purchase ready solutions instead of rolling your own using ESP32 for a fraction of the price?

Not that there isn't value to rolling your own, just I wouldn't assume it's as cheap and easy as you might originally.

Along with that using 433MHz means that there's a much longer range, and they generally also have much lower power usage compared to doing wifi, which makes the batteries last a lot longer.

Most of the things inside my house are ESP32 or zigbee things I put together myself. Things that go outdoors, though, I'm much more likely to purchase an off-the-shelf solution for longevity's sake. Especially if the whole point of the item is to be rained/snowed on, be left in direct sunlight, and so forth.

Running on an Adafruit ESP32 Feather board, it wakes up, sends its current readings over Wi-Fi to an MQTT service (that is on a Raspberry Pi), and goes back to sleep for 10 minutes. A little daemon running saves to Sqlite database, and another ESP32 unit inside has its own sensor, as well as displaying both (outside pulled from MQTT).

I've got some pictures and such, though haven't quite gotten to the much-belated blog post yet.

Thanks for the preview. Looking forward to it.

I already had the sensors long before I had the SDR; they're paired with display units as well.

  - https://birdnetpi.com — Bird call logging
  - https://flightaware.com/adsb/piaware/ — ADS-B Tracking
  - https://pi-hole.net — Network wide ad blocking
  - https://homebridge.io — HomeKit bridge for many devices/services

I love this idea. I've just started getting into birds, and I wish I had steady enough hands to build a solar+battery version of this I could stash in the woods for a week.

https://www.openacousticdevices.info/audiomoth

Oh, checking out the AudioMoth linked elsewhere, looks like that works for recording birds and bats. Down the rabbit hole I go.

Didn't have the time to put a fancy algorithm to detect movement so it's rough, but it has been working perfectly for the past 4 years with no false positive/negative.

https://github.com/jebeaudet/time-to-fold-alerter

RPI400 is available pretty much everywhere, but rpi3, 4 or zeroW like they never existed.

I decided to check on my phone on a whim. They showed 8 in stock. By the time I got there, 30 minutes later, they had 3 left.

That PiLocator site does show the last time they've been in stock, and from my non-scientific assessment, it looks like availability is slightly getting better.

I assume it's some agreement not to list all the variants to try to allow hobbyists to still get some.

I don't need any video output, and I'm happy to pay double. What are my options?

https://www.ebay.com/sch/i.html?_nkw=wyse+3040

Many listings will not include the power supply, but if you have a drawer full of wall warts, you can probably find something that works.

>Some have workarounds, but some are fatally flawed and none are fully free.

https://wiki.gentoo.org/wiki/PINE64_ROCKPro64

[0] https://www.lobe.ai/

I did subscribe to a monitored alarm service specifically for the smoke detectors, on the theory that while I have little need for a burglar alarm here, I would really want the fire department sent if something started while I was out. I'm on my local department, and usually home, but the neighbours wouldn't know quickly if something happened while we're away.

I guess ideally I'd spend as little time as possible on tinkering with low-level rendering code.

Any rpi just fits with the gpio pins like a typically HAT. I'm using an rpi zero 2 w. Setup was less than 5 minutes.

I'm now hooking up a system that will take screenshots from a home assistant dashboard and push that to the display every 5 minutes.

[0] https://shop.pimoroni.com/products/inky-impression-5-7?varia...

https://e-radionica.com/en/catalogsearch/result/?q=inkplate

https://esphome.io/components/display/inkplate6.html