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DIY IP-KVM Based on Raspberry Pi

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Re: DIY IP-KVM Based on Raspberry Pi

#51

Post by consp »

adamzegelin wrote: post #46
pizza wrote: 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…

Probably do-able using Pipewire/Pulseaudio. I just tried, and I'm able to pair both my Macbook Pro and iPhone to my Linux desktop PC. The PC has Kensington Bluetooth USB dongle. Both the MBP and iPhone can simultaneously play audio over Bluetooth and I can route the incoming audio to a pair of wired headphones. The volume of each stream is independently adjustable via `pavucontrol`. I also tried pairing a bluetooth h…

> I also tried pairing a bluetooth headset, but the audio was choppy.

Try reconnecting it. I have the same problem with my headset sometimes and reconnecting fixes it. My best guess is the implementation of the two Bluetooth modules don't play nice with each other. I have no troubles connecting to a different pc.

Re: DIY IP-KVM Based on Raspberry Pi

#52

Post by rfoo »

maxlin wrote: post #36

I once wanted to build one like this, but for console devkits. That situation was and went, but I did end up wanting to have the same for all windows machines at work and home (Unity dev, so workstations, test runners even servers are desktop windows machines). My solution was: -BIOS: auto-power on when power is connected -Smart power plugs on important computers -AnyDesk for software on all machines, with unattended…

I have one and indeed my only use of it is to type in BitLocker password when I'm not at home. I really hope one day I can just ssh in and unlock the disk like what I do with LUKS.

Re: DIY IP-KVM Based on Raspberry Pi

#55

Post by numpad0 »

anilakar wrote: post #18
RockRobotRock wrote: post #5

Earlier quoted context omitted.

<$10 adapter

Server VGA output to HDMI capture input? Needs an active converter in that direction, not a passive pinout-changing one.

There are both VGA-HDMI and HDMI-VGA easily powered from a spare USB port, sometimes even HDMI bus power. I’ve heard the data can be converted line-by-line and timings are close enough that such devices never need to hold the complete framebuffer.

Re: DIY IP-KVM Based on Raspberry Pi

#56

Post by themoonisachees »

numpad0 wrote: post #49
progbits wrote: 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.

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.

A kvm without iso mount may as well not be a kvm at al

Re: DIY IP-KVM Based on Raspberry Pi

#57

Post by midasuni »

pizza wrote: 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…

So a normal analog 3.5mm input into a cheap mixer?

20 years on and bluetooth still can’t get the ease and reliability of a 50 cent audio cable.

Re: DIY IP-KVM Based on Raspberry Pi

#58

Post by redserk »

midasuni wrote: post #57
pizza wrote: 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…

So a normal analog 3.5mm input into a cheap mixer? 20 years on and bluetooth still can’t get the ease and reliability of a 50 cent audio cable.

Depends on your devices. My Airpods switch between my iPhone, Macbook, and iPad without issue.

Re: DIY IP-KVM Based on Raspberry Pi

#59

Post by Nextgrid »

adamzegelin wrote: post #46
pizza wrote: 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…

Probably do-able using Pipewire/Pulseaudio. I just tried, and I'm able to pair both my Macbook Pro and iPhone to my Linux desktop PC. The PC has Kensington Bluetooth USB dongle. Both the MBP and iPhone can simultaneously play audio over Bluetooth and I can route the incoming audio to a pair of wired headphones. The volume of each stream is independently adjustable via `pavucontrol`. I also tried pairing a bluetooth h…

Definitely possible, and I've done a similar proof of concept using PipeWire with "Wireplumber" as the GUI to map the required inputs/outputs to a wired headset.

The problem was that I had no clue where to even begin to make this setup persistent so I could eventually put it all on a GUI-less RPi, so I gave up.

Re: DIY IP-KVM Based on Raspberry Pi

#60

Post by vbezhenar »

numpad0 wrote: post #49
progbits wrote: 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.

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.
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