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Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

jeffgeerling.com

41–50 of 70 posts

Re: Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

#41
I wanted to implement a KVM on my pi (a while back). I had the usb hdmi capture dongle. What prevented my from finishing the project was getting power in and usb out on the pi connector.

It required a custom cable that I didn't want to build myself. Are cables of this type more readily available now?

Re: Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

#42

I want one of these with an LTE modem on it so that I can drop it in the rack (non-datacenter) and remote-in regardless of the WAN condition.

It's a Raspberry Pi, so there's no reason you can't plug a USB LTE Modem into it. You'd have to figure out how to get inbound connections - perhaps something like tailscale would do the trick.

Tor would work too

Re: Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

#43
post #41

I wanted to implement a KVM on my pi (a while back). I had the usb hdmi capture dongle. What prevented my from finishing the project was getting power in and usb out on the pi connector. It required a custom cable that I didn't want to build myself. Are cables of this type more readily available now?

There are a couple of vendors (including me[0]) that offer a circuit board that splits the Pi's USB-C port into separate data and power ports with reverse current protection.

There are cables that do the same thing, but they don't provide reverse current protection. If there's a voltage difference between the USB port on your target system and the PSU feeding your Raspberry Pi, you can mess up the system's USB port or damage your Pi.[1]

[0] https://tinypilotkvm.com/product/tinypilot-power-connector

[1] https://github.com/tiny-pilot/tinypilot/wiki/Powering-your-T...

Re: Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

#45
post #7

PiKVM v3 HAT on Kickstarter right now. https://www.kickstarter.com/projects/mdevaev/pikvm-v3-hat // I'm the author ;)

Thanks for sending me the prototype to test; besides the labeling issue, and the fact that I accidentally fried one of the fan power cables (thought I'd burnt up the whole unit!) when I first put it together, it's already a great product. I hope you sell many more thousands, and keep improving the experience!

Same here, I hope you sell a LOT of these, because it's still a bit expensive for my home lab stuff and I want you to benefit from economies of scale so I can buy a hat for around sixty dollars.

Re: Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

#46
post #34
post #14

Earlier quoted context omitted.

So is a VGA digitizer that plugs into a USB port, presumably?

For my design I don't want that, because then we're just making it even more complex. There's a VGA encoder I've been working on, I don't recall the chip ID but I found it in the Lantronix Spiders I have. I've been slowly trying to build a HAT with that that pipes into the Pi for everything else.

How many of these do you expect to manufacture?

Re: Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

#47
post #8

TinyPilot founder here. Happy to answer any questions about TinyPilot or KVM over IPs.

General microcontroller questions if you don't mind. Lets say that I prototype something on dev board like something from Raspberry Pi, or ones from STM. Now I want to do a full product, (like the Tiny Pilot) with the microprocessor on a custom PCB board with just the necessary hardware. I understand that you have to design the schematic and then get the PCB layout done, but in terms of figuring out which pins to con…

> I understand that you have to design the schematic and then get the PCB layout done, but in terms of figuring out which pins to connect, is it just a matter of figuring it out from the microcontroller manual?

yes. if you're using ST parts i suggest using their CubeMX tool, if only to figure out pin assignment. makes it way smoother.

i've seen multiple real projects with real engineers who should get this shit right screw up pin assignment.

also seen them just... not read the data sheet. i don't understand how they expected the board to work, but, it happened.

Re: Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

#48

If there was a rpi hat that had multiple connections I would probably use it, a $300 avocent 24 port KVM w/ html5 interface is much more cost effective than 24 pikvms, etc.

My plan is to connect a single pi-kvm to the aging Avocent in my homelab rack. The Avocent can connect to dozens of devices, but the IP interface for it is old and unreliable. Hopefully the pi-KVM will make that experience painless.

Re: Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

#49

If there was a rpi hat that had multiple connections I would probably use it, a $300 avocent 24 port KVM w/ html5 interface is much more cost effective than 24 pikvms, etc.

What model? It was quite expensive for one w/htlm5 interface. $400ish for a single port one IIRC

Re: Raspberry Pi KVMs Compared: TinyPilot and Pi-KVM v3

#50
post #41

I wanted to implement a KVM on my pi (a while back). I had the usb hdmi capture dongle. What prevented my from finishing the project was getting power in and usb out on the pi connector. It required a custom cable that I didn't want to build myself. Are cables of this type more readily available now?

This is probably all sorts of improper. But I've used a cable like this https://www.amazon.com/gp/product/B08C5FWQND/ref=ppx_yo_dt_b... .

Then 5V USB-C power supply into the USB-C connector and a USB-A to USB-C cable into the motherboard which had a USB-C port. You could probably also find a USB-A male to male cable and use that if your motherboard doesn't have USB-C.

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