1U Rackmount PiKVM Multi IP KVM

Introduction

Based on the PiKVM project, this is a 1U rack mount PiVKM IP based KVM. Using a Raspberry PI 4 and a 4-channel HDMI switcher with USB for switching inputs, as well as full relay based ATX control.

The HDMI switch I used included a 4-channel remote for selecting specific inputs 1 through 4. I used this to switch inputs from the PiKVM Web UI. The ATX relays can also be controlled from the Web UI.

The enclosure I used was from a stripped-down Sophos firewall which included a fan but any 1U enclosure with good room will work. I will admit the fabrication on the front and rear panels could have been better if I had a laser cutter.

Gallery

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Configuration

This defines the configuration used for the override.yaml for PiKVM. Below defines the pins used for the specific outputs for ATX and input switching. Add this to the /etc/kvmd/override.yaml

kvmd:
    atx:
        type: disabled
    gpio:
        scheme:
            button1: #red
                pin: 26
                mode: output
                switch: false
            button2: #blue
                pin: 13
                mode: output
                switch: false
            button3: #green
                pin: 21
                mode: output
                switch: false
            button4: #yellow
                pin: 27
                mode: output
                switch: false
            button5:
                pin: 19
                mode: output
                switch: false
                inverted: true
            button6:
                pin: 20
                mode: output
                switch: false
                inverted: true
            button7:
                pin: 12
                mode: output
                switch: false
                inverted: true
            button8:
                pin: 22
                mode: output
                switch: false
                inverted: true
            button9:
                pin: 4
                mode: output
                switch: false
                inverted: true
        view:
            header:
                title: Input Select
            table:
                - ["#Inputs"]
                - []
                - ["#Input Toggle:", button9]
                - ["#Input 1:", button1]
                - ["#Input 2:", button2]
                - ["#Input 3:", button3]
                - ["#Input 4:", button4]
                - ["#Remote Reboot"]
                - []
                - ["#Reboot 1:", button5]
                - ["#Reboot 2:", button6]
                - ["#Reboot 3:", button7]
                - ["#Reboot 4:", button8]

Wiring

Below outlines the basic wiring diagram used for my setup.

Configuration Variables

Setting a Static IP. Edit the /etc/systemd/network/eth0.network and set your static IP details.

Modify the

[Match]
Name=eth0

[Network]
Address=192.168.1.100/24
Gateway=192.168.1.1
DNS=<your 192.168.1.1
DNS=8.8.8.8