Live data from Hacker News

DIY IP-KVM Based on Raspberry Pi

github.com

61–70 of 91 posts

Re: DIY IP-KVM Based on Raspberry Pi

#61

I am curious if there are any decent and very affordable regular KVMs (to use locally, not over IP). The cheapest one I found for a three monitor DP setup was ~$500 (Star Tech).

https://www.store.level1techs.com/products/p/14-kvm-switch-t...

Not the cheapest, but very good.

Re: DIY IP-KVM Based on Raspberry Pi

#63
post #23
post #9

I like this project but the hardware seems quite overpriced at $300+. Similar for tinypilotkvm.com. In the past I've considered making and selling a cheaper version. Aside from lack of time (or motivation), one thing which discouraged me is that I would feel bad "undercutting" someone selling open hardware.

TinyPilot founder here. I understand the feedback about the price. When I created the original TinyPilot,[0] I wanted a low-priced alternative to the $600 KVM over IP options I was seeing, and now I sell my devices for $400-500/unit. The thing that's tough about selling hardware is that it seems easy to produce a few units cheaply, but creating a sustainable business for it, the costs add up. You have to fulfill orde…

Hey, thanks for commenting. I'm a big fan of your transparency and don't get me wrong, I like the product and the price is certainly better than the "enterprise" gear.

But I personally don't care about support, the enclosure can be 3d printed or some cheap plastic box, if sold as DIY kit it would save assembly costs and avoid need for certification and so on. I think there is a small market for homelabers like myself who would pay maybe $100-150 for a simpler product.

And congrats on being profitable.

Re: DIY IP-KVM Based on Raspberry Pi

#64
post #9

I like this project but the hardware seems quite overpriced at $300+. Similar for tinypilotkvm.com. In the past I've considered making and selling a cheaper version. Aside from lack of time (or motivation), one thing which discouraged me is that I would feel bad "undercutting" someone selling open hardware.

You’d be surprised at how expensive it can be to manufacture, program, test, package, warehouse, sell, ship, and support small hardware projects like this. It may seem overpriced when compared to collecting all of the pieces and putting them together for yourself, but the person trying to do this as a business has to make a big investment in up front purchasing as well as labor to get them all together and shipped ou…

It helps to remember that your own time has a cost associated with it. Standing one up from pieces is probably a couple of days of indecision over component selection and loss to misc software refusing to behave itself.

An arm soc is probably $100. So break even is maybe $200 per day getting the thing working. Thus should buy the thing, unless you particularly enjoy the construction process more than whatever else you could spend the weekend doing.

The posted profit over time figures suggests the above back of envelope is rather optimistic, so there's a non-zero risk that after the weekend the thing wouldn't work.

(and thus I've learned that the UK distributor is in Germany with possible brexit/VAT hazards, but hopefully it'll turn up at some point)

Re: DIY IP-KVM Based on Raspberry Pi

#65

On the re-sellers page the Swedish/Norwegian re-seller Direktronik [1] are selling the unit for 6300 SEK (534 Euro). 1. https://www.direktronik.se/direktronik/natverk/kvm-switchare...

Saw that too. Insane, predatory almost. The Swiss or Netherlands based shops seemed to be the most reasonable way if you wanted to buy the HAT.

Re: DIY IP-KVM Based on Raspberry Pi

#66
post #23
post #9

I like this project but the hardware seems quite overpriced at $300+. Similar for tinypilotkvm.com. In the past I've considered making and selling a cheaper version. Aside from lack of time (or motivation), one thing which discouraged me is that I would feel bad "undercutting" someone selling open hardware.

TinyPilot founder here. I understand the feedback about the price. When I created the original TinyPilot,[0] I wanted a low-priced alternative to the $600 KVM over IP options I was seeing, and now I sell my devices for $400-500/unit. The thing that's tough about selling hardware is that it seems easy to produce a few units cheaply, but creating a sustainable business for it, the costs add up. You have to fulfill orde…

I'm very impressed with your write up and transparency. I hope the manufacturing issues are sorted out! I don't manufacture anything but I've read a 3x rule of sale price to raw input cost.

Re: DIY IP-KVM Based on Raspberry Pi

#67
post #49

Earlier quoted context omitted.

I wonder if the cost can be cut by replacing computer part with ESP32 at the cost of losing .iso mount and video input quality, and at the same time take out SD card anxiety. The only problem is difficulty of getting framebuffer cheaply, I think.

Raspberry Pi cost is few bucks. You won't save significant money here, but will lose very significant computing power and software ecosystem.

But it's also bloat on a rescue device. KVM has to and only has to work when a remote computer is unable to come back online, no need for computing power or app marketplace to fix that.

Re: DIY IP-KVM Based on Raspberry Pi

#68
post #26
post #9

I like this project but the hardware seems quite overpriced at $300+. Similar for tinypilotkvm.com. In the past I've considered making and selling a cheaper version. Aside from lack of time (or motivation), one thing which discouraged me is that I would feel bad "undercutting" someone selling open hardware.

basic functionality with generic hardware looks doable and one-clickable for a pi4: usb splitter $9 - https://www.amazon.com/dp/B08C5FWQND usb power blocker $7 - https://www.amazon.com/dp/B094FYL9QT hdmi-csi2 adapter $32 - https://www.amazon.com/dp/B09GY9M9BX atx power control looks less off-the-shelf

You can save even more by making the splitter/power blocker yourself. It's simple enough that you can even do it by twisting instead of proper soldering, as long as you have a couple of cables you can sacrifice. On top of that you can get a cheaper hdmi-usb converter instead of using MIPI. They don't recommend it because the latency is bad and it's awkward, but it's still serviceable, especially if you only use the KVM for quick tasks. Doing it this way you could make the thing for only about ten euro cost on top of the pi.

Re: DIY IP-KVM Based on Raspberry Pi

#69

Earlier quoted context omitted.

>I would feel bad "undercutting" someone selling open hardware As a potential customer, I feel bad you feel that way.

Roll your own. I've got one running PiKVM software on a Pi Zero 2W with an AliExpress HDMI-CSI board connected, and the whole thing bundled together with kapton tape and hanging off the USB port on a headless system. I had to mask off one pin on one of the two microUSB cables. I think I'm into it for about €50 including the Pi0. The instructions are/were on their website.

Do you have a link?

Re: DIY IP-KVM Based on Raspberry Pi

#70
post #13

Would love a bluetooth muxer via rpi. Have a few devices that keep conflicting with one another and acquiring the connection to my bluetooth headset. I have to go through the hassle of navigating to the offending device's bluetooth settings, disconnect it, go to my desired device's settings (which, although it reports it is connected, doesn't actually produce any sound), disconnect it, then reconnect it. Each time. I…

I had plans to do such project for exactly same reasons since, like, 2011..

Wanted to have pulseaudio/alsa dmix handling multiple streams/mixing them out with a help of dedicated hardware BT/DAC-ADC-BT path, with a goal to have smart handling of voice calls over music on the go, fake 5.1 in the room, and a voice enhancer / fast rewind for call streams..

Then, Volumio took enough of the raspberry-based hifi market (despite having no bluetooth support, lol) that I've declared these plans no-go as investing in this solely for fun wasn't that enticing, compared to just getting a spare set of equipment to separate work/home audio.

Post reply on HN