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PiKVM Handbook
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DIY PiKVM V1 quickstart guide
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Device guides
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Device guides
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<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../v4/" class="md-nav__link">
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PiKVM V4 Mini &amp; Plus
</span>
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PiKVM V3
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PiKVM Switch
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DIY PiKVM V2
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DIY PiKVM V1
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DIY PiKVM V1
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Required parts
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Setting up the hardware
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Wiring
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Power up
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Configure the display
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Access PiKVM
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Change the default passwords
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Access the remote system
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Important next steps
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Further recommendations
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Known issues and limitations
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Basic troubleshooting
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Getting user support
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Getting started
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Getting started
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Cheat Sheet
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Web UI Overview
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Configuring PiKVM
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Authentication &amp; 2FA
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FAQ &amp; Troubleshooting
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Flashing OS
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Networking
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Internet access
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Port forwarding
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</li>
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<span class="md-ellipsis">
Reverse proxy
</span>
</a>
</li>
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<a href="../tailscale/" class="md-nav__link">
<span class="md-ellipsis">
Tailscale VPN
</span>
</a>
</li>
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<a href="../cloudflared/" class="md-nav__link">
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Cloudflare Tunnel
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</li>
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Setting up Wi-Fi
</span>
</a>
</li>
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Setting up 3G/4G/LTE modem
</span>
</a>
</li>
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Let's Encrypt certificates
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</li>
</ul>
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Video
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</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="false">
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Video
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../video/" class="md-nav__link">
<span class="md-ellipsis">
Video modes (WebRTC, Direct)
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../webrtc_config/" class="md-nav__link">
<span class="md-ellipsis">
WebRTC configuration
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../edid/" class="md-nav__link">
<span class="md-ellipsis">
Tuning HDMI EDID
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../pass/" class="md-nav__link">
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HDMI passthrough
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</li>
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Peripheral devices
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<div class="md-content" data-md-component="content">
<article class="md-content__inner md-typeset">
<div><h1 id="diy-pikvm-v1-quickstart-guide">DIY PiKVM V1 quickstart guide<a class="headerlink" href="#diy-pikvm-v1-quickstart-guide" title="Permanent link"></a></h1>
<div class="admonition tip">
<p class="admonition-title">So many choices!</p>
<p>There are many different options with sub-items, so you can choose what will suit you.<br>
However, we marked the recommended way by sign <strong><code>✮ ✮ ✮</code></strong></p>
</div>
<hr>
<h2 id="required-parts">Required parts<a class="headerlink" href="#required-parts" title="Permanent link"></a></h2>
<ol>
<li>
<p><strong>MicroSD card minimum 8Gb class 10.</strong></p>
</li>
<li>
<p><strong><a href="https://www.amazon.com/Capture-Streaming-Broadcasting-Conference-Teaching/dp/B09FLN63B3">Official USB-Micro Power Supply</a></strong>.</p>
</li>
<li>
<p><strong>Raspberry Pi board:</strong></p>
<ul>
<li><strong><a href="https://www.raspberrypi.com/products/raspberry-pi-3-model-b/">✮ ✮ ✮ Raspberry Pi 3</a></strong>.<br></li>
<li>... or <a href="https://www.raspberrypi.com/products/raspberry-pi-3-model-b/">Raspberry Pi 2</a>.<br>
<em>Does not support H.264 even with HDMI-CSI bridge.</em></li>
<li>... or <a href="https://www.raspberrypi.com/products/raspberry-pi-zero-2-w/">Raspberry Pi Zero 2 W</a>.<br>
<em>Compact and cheap, but not so reliable solution because of lack of the wired Ethernet.
Note that the better way to use Pi Zero is making <a href="../v2/">PiKVM V2</a> - it supports more USB features.</em></li>
</ul>
</li>
<li>
<p><strong>Video capture device:</strong></p>
<ul>
<li><strong><a href="https://www.amazon.com/waveshare-HDMI-CSI-Camera-Adapter/dp/B08TR7R6RL/">✮ ✮ ✮ HDMI-CSI bridge based on TC358743 chip</a></strong>.<br>
<em>Supports H.264 video encoding on Raspberry Pi 3, automatic resolution selection and the lowest possible latency.</em></li>
<li>... or <a href="https://www.amazon.com/Capture-Streaming-Broadcasting-Conference-Teaching/dp/B09FLN63B3">HDMI-USB dongle</a>.<br>
<em>Only heavy MJPEG video, no resolution detection, big latency compared to HDMI-CSI.
Some users report hardware problems: the dongle may not work in the BIOS or simply stop working after a while.
It's a black box, and no one knows what's inside it. If you have problems with it, it will not be possible to fix them.</em></li>
</ul>
</li>
<li>
<p><strong>The Pico HID Keyboard &amp; mouse emulator:</strong></p>
<ul>
<li>
<p><em>x1</em> <a href="https://www.raspberrypi.com/products/raspberry-pi-pico/">Raspberry Pi Pico board</a> with soldered pins. Pico 2 is not supported right now.</p>
</li>
<li>
<p><em>x1</em> USB-A to Micro-USB cable.</p>
</li>
<li>
<p><em>x10</em> dupont wires female-female.</p>
</li>
<li>
<p><em>x1</em> 1N5819 diode. It's optional but strongly recommended. Any similar one will do.</p>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>The diode is needed to provide power to the Pico HID regardless of the target host state,
which prevents the backpowering problem. It will allow you to keep the keyboard buttons pressed
during the target host power cycle, which is, for example, important for MacOS to get into the boot menu.</p>
<p>Do not connect the red wire (the <code>VSYS (Pico) -&gt; 5V (Pi)</code> line) without a diode.
If you can't find a diode, don't connect this wire at all.</p>
</div>
</li>
</ul>
</li>
<li>
<p><strong>Board-specific parts:</strong></p>
<div class="admonition success">
<p class="admonition-title">✮ ✮ ✮ "Nothing special for Raspberry Pi 2 or 3</p>
</div>
<details class="note">
<summary>Raspberry Pi Zero 2 W</summary>
<details class="note">
<summary>✮ ✮ ✮ HDMI-CSI bridge</summary>
<ul>
<li><em>x1</em> <a href="https://www.amazon.com/Arducam-Raspberry-Camera-Ribbon-Extension/dp/B085RW9K13">Raspberry Pi Zero Camera Cable</a>. <em>Not compatible with Auvidea B101</em>.</li>
</ul>
</details>
<details class="note">
<summary>... or HDMI-USB dongle</summary>
<ul>
<li><em>x1</em> USB-A socket to USB-Micro adapter (female-male).</li>
</ul>
</details>
</details>
</li>
<li>
<p><strong>Optional features:</strong></p>
<details class="success">
<summary>✮ ✮ ✮ ATX controller to manage the target host's power</summary>
<p>With this part, you will be able to remotely turn on, turn off and restart your computer!</p>
<ul>
<li><em>x4</em> optocouplers
<a href="https://eu.mouser.com/ProductDetail/Toshiba/TLP241BFF?qs=CiayqK2gdcK1m25Yj88BfQ%3D%3D">TLP241BF(F</a>
or <a href="https://eu.mouser.com/ProductDetail/Sharp-Microelectronics/PC817X2NSZ9F?qs=rrS6PyfT74ehABo1g8zXHw%3D%3D">PC817X2NSZ9F</a> (the input polarity must be observed)
or <a href="https://www.digikey.com/products/en?keywords=G3VM-61A1">OMRON G3VM-61A1</a>
or <a href="https://www.digikey.com/products/en?keywords=G3VM-61AY1">OMRON G3VM-61AY1</a><br>
<em>Don't use random relay modules or random optocouplers! Some of these may not be sensitive enough
for the Raspberry Pi, some others may be low-level controlled. Either use relays that are activated by a high logic level,
or follow the design provided. See details <a href="https://github.com/pikvm/pikvm/issues/13">here</a>.</em></li>
<li><em>x4</em> 390 Ohm resistors (see <a href="https://github.com/pikvm/pikvm/issues/46">here</a> for alternatives).</li>
<li><em>2x</em> 4.7 kOhm resistors.</li>
<li><em>x10+</em> dupont wires male-male.</li>
<li><em>x1</em> a breadboard.</li>
<li><em>various</em> wires for the breadboard.</li>
</ul>
<p>This can be partially replaced by using <a href="../wol/">Wake-on-LAN</a> in the software, but it will not allow
to reboot a hung system, and it is not as reliable as an ATX controller. Sometimes the Wake-on-LAN
on the host just stops working, for its own or network reasons.</p>
</details>
<details class="note">
<summary>PS/2 Keyboard &amp; mouse</summary>
<p>The use of PS/2 is intended for advanced users. Check out the additional list of details in advance
in the <a href="../pico_hid/#ps2-keyboard-mouse">corresponding paragraph</a> of the Pico HID manual.</p>
</details>
<details class="note">
<summary>VGA video capture</summary>
<p>If you want to capture VGA from your server instead of HDMI,
buy the <a href="https://aliexpress.com/item/3256801728005613.html">VGA-to-HDMI converter</a>.
Some converters have issues with not supporting all resolutions and refresh rates.</p>
</details>
</li>
</ol>
<hr>
<h2 id="setting-up-the-hardware">Setting up the hardware<a class="headerlink" href="#setting-up-the-hardware" title="Permanent link"></a></h2>
<ol>
<li>
<p><strong>Video capture device:</strong></p>
<details class="success">
<summary>✮ ✮ ✮ HDMI-CSI bridge</summary>
<p>Insert the flexible flat cable of the HDMI-CSI bridge into the narrow white connector on the Raspberry Pi
(the closest one to big USB sockets). It is labeled <code>CAMERA</code>. To insert you need to open the connector first.
On the Raspberry Pi side you can gently lift the black part up and a little bit sideways:</p>
<table>
<thead>
<tr>
<th>Opening the MIPI CSI slot on the Raspberry Pi</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../_diy/open_mipi_csi.jpg" data-desc-position="bottom"><img src="../_diy/open_mipi_csi.jpg" width="500"></a></td>
</tr>
</tbody>
</table>
<p>For the HDMI-CSI bridge this operation depends on the version you bought.
Either pull it gently up as on the Raspberry or push it sideways.
Make sure that the cable is inserted on the correct side and until it stops, and then push the black latch back.
Avoid using force when pushing the cable in, as the slots bond to the PCB is quite fragile.
Never connect or disconnect the flat cable from a powered device. This is not Plug-and-Play, and you can damage it.
Also use only the cable that was included with the device package, or make sure that the third-party cable has the correct pinout.</p>
<table>
<thead>
<tr>
<th>HDMI-CSI bridge connected to Raspberry Pi 4</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../_diy/rpi4_csi_connection.jpg" data-desc-position="bottom"><img src="../_diy/rpi4_csi_connection.jpg" width="500"></a></td>
</tr>
</tbody>
</table>
<table>
<thead>
<tr>
<th>HDMI-CSI bridge connected to Raspberry Pi 2 W (using the adapter cable)</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../_diy/rpi2w_csi_connection.jpg" data-desc-position="bottom"><img src="../_diy/rpi2w_csi_connection.jpg" width="500"></a></td>
</tr>
</tbody>
</table>
</details>
<details class="note">
<summary>... or HDMI-USB dongle</summary>
<details class="note">
<summary>Raspberry Pi 2 &amp; 3</summary>
<p>Connect USB dongle to exactly this port. It is bound in the software so the OS does not confuse the video device with something else.</p>
<table>
<thead>
<tr>
<th>Raspberry Pi 2 and 3</th>
<th>Raspberry Pi 4</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../_diy/usbcap_rpi2.jpg" data-desc-position="bottom"><img src="../_diy/usbcap_rpi2.jpg" width="200"></a></td>
<td><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../_diy/usbcap_rpi4.jpg" data-desc-position="bottom"><img src="../_diy/usbcap_rpi4.jpg" width="200"></a></td>
</tr>
</tbody>
</table>
<p>There are many revisions of the Raspberry Pi boards and you may come across one that we haven't tested.
If the binding fails, the device will be available for all ports.
Everything will work, but if you use a webcam and Linux mistakes it for a dongle,
<a href="https://pikvm.org/support/">write to us</a> and we will fix it.</p>
</details>
<details class="note">
<summary>Raspberry Pi Zero 2 W</summary>
<p>Connect the USB dongle to USB-to-Micro adapter, and connect it to the USB port marked as <code>USB</code> (not <code>PWR</code>)
on the Pi Zero board:</p>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../_diy/usbcap_zero2w.jpg" data-desc-position="bottom"><img src="../_diy/usbcap_zero2w.jpg" width="400"></a></p>
</details>
</details>
</li>
<li>
<p><strong>The Pico HID and ATX controller:</strong></p>
<p>Connect all the parts according to this scheme:</p>
<details class="success">
<summary>✮ ✮ ✮ With ATX controller</summary>
<details class="example">
<summary>Simple wiring diagram</summary>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../v1/v1_breadboard.png" data-desc-position="bottom"><img src="../v1/v1_breadboard.png"></a></p>
</details>
<details class="example">
<summary>Electrical schematic diagram for advanced users</summary>
<p><a target="_blank" href="../v1/v1_scheme.png"><img src="../v1/v1_scheme.png"></a></p>
</details>
</details>
<details class="note">
<summary>... or without ATX controller</summary>
<details class="example">
<summary>Simple wiring diagram</summary>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../pico_hid/basic_breadboard.png" data-desc-position="bottom"><img src="../pico_hid/basic_breadboard.png"></a></p>
</details>
<details class="example">
<summary>Electrical schematic diagram for advanced users</summary>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../pico_hid/basic_scheme.png" data-desc-position="bottom"><img src="../pico_hid/basic_scheme.png"></a></p>
</details>
</details>
</li>
<li>
<p><strong><a href="../pico_hid/" target="_blank">Flash firmware to the Pico HID.</a></strong></p>
</li>
<li>
<p><strong><a href="https://docs.pikvm.org/flashing_os" target="_blank">Flash the memory card with PiKVM OS</a></strong> and insert it to Raspberry Pi.</p>
</li>
</ol>
<hr>
<h2 id="wiring">Wiring<a class="headerlink" href="#wiring" title="Permanent link"></a></h2>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Double check that the circuit is assembled correctly to avoid any damage of the hardware.</p>
</div>
<p>PiKVM V1 requires several items available separately:</p>
<ul>
<li>
<p>Ethernet cable <strong>(Raspberry Pi 2 and 3 only)</strong></p>
</li>
<li>
<p>HDMI cable</p>
</li>
</ul>
<p>Let's connect all the wires before you power up the device.</p>
<ol>
<li>
<p>Connect the HDMI video capture device to the video output port on the target host.</p>
</li>
<li>
<p>Connect the Pico HID to the USB port on the target host.</p>
</li>
<li>
<p><strong>Raspberry Pi 2/3</strong>: connect <strong>Ethernet</strong> to the network, e.g., to the Wi-Fi router.</p>
</li>
<li>
<details class="example">
<summary>Connect the ATX controller if you built it</summary>
<p>To control the power, two display LEDs (power and HDD activity) and two buttons (power and reset) are provided
on the front panel of the computer case. They are connected by wires to pins on the motherboard.</p>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../atx_board/atx_board_5.jpg" data-desc-position="bottom"><img src="../atx_board/atx_board_5.jpg" width="500"></a></p>
<p>All you have to do is connect the PiKVM ATX controller to their wires by making a parallel connection.
Please note that the pinout differs on different motherboards, so before you continue,
check the documentation on your motherboard for correct pinout.</p>
<p>The following illustration shows how the connection between the power LED and the power button should be performed:</p>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../_diy/atx_connection.png" data-desc-position="bottom"><img src="../_diy/atx_connection.png" width="500"></a></p>
<p>On the left are the wires from the PiKVM ATX controller, the pad in the middle indicates the pins on the motherboard,
and on the right are the LED and button of the target host. The implementation of this scheme is left to your discretion
and can be performed, for example, by cutting wires and performing twisting, followed by insulation with duct tape.</p>
<p>Be careful and respect the polarity of the LEDs. The polarity of the button does not matter (they have no polarity at all).
The connection of HDD LED and reset switch is performed in the same way.</p>
</details>
</li>
</ol>
<hr>
<h2 id="power-up">Power up<a class="headerlink" href="#power-up" title="Permanent link"></a></h2>
<p>If everything is assembled correctly, attach the power supply to the Raspberry Pi.</p>
<p>After turning on the power, PiKVM OS generates unique SSH keys and certificates and performs all necessary operations on the memory card. It takes a few minutes.</p>
<p><strong>Do not turn off the device until it's fully booted for the first time.</strong></p>
<hr>
<h2 id="configure-the-display">Configure the display<a class="headerlink" href="#configure-the-display" title="Permanent link"></a></h2>
<p>The operating system on your remote computer will treat PiKVM as an additional display and use it in the Extend mode by default. That's why you will see an empty desktop when you first connect.</p>
<p>To avoid that, go to the display settings in your remote computer's operating system and enable the mirror mode for the external screen that you operating system identifies as PiKVM. Refer to your operating system's documentation on that.</p>
<hr>
<h2 id="access-pikvm">Access PiKVM<a class="headerlink" href="#access-pikvm" title="Permanent link"></a></h2>
<p>You need to know PiKVM's IP address in the network to be able to access it. Unlike <a href="../v3/">PiKVM V3</a> and <a href="../v4/">V4</a>, PiKVM V1 doesn't have an OLED to display the IP address it receives automatically. You need to discover it manually. There are several ways to do that.</p>
<ul>
<li><strong>Common way:</strong> Open the web interface of your router and find the list of issued IP addresses there.</li>
<li><strong>Linux-only:</strong> Use the <code>arp-scan --localnet</code> command.</li>
<li><strong>Linux, MacOS, Windows:</strong> Download and run <a href="https://angryip.org">Angry IP Scanner</a>.</li>
<li><strong>Windows PowerShell:</strong> Use the <code>arp -a</code> command.</li>
</ul>
<p>Let's assume that PiKVM has received the address <code>192.168.0.26</code> and has also been assigned a hostname <code>pikvm</code>.</p>
<p>Type the URL in the browser's address bar and press <strong>Enter</strong>: <a href="https://192.168.0.26/">https://192.168.0.26/</a> or <a href="https://pikvm/">https://pikvm/</a>.</p>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../v4/login-prompt.png" data-desc-position="bottom"><img alt="Login screen" src="../v4/login-prompt.png" width="450"></a></p>
<p>Submit the default credentials and click <strong>Login</strong>:</p>
<ul>
<li>Username: <code>admin</code></li>
<li>Password: <code>admin</code></li>
<li>2FA Code: disabled by default, skip this field</li>
</ul>
<p>You will see the initial dashboard screen of the PiKVM where you can access the remote host, connect to the PiKVM command line, or log out:</p>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../v4/initial-ui.png" data-desc-position="bottom"><img alt="Initial UI" src="../v4/initial-ui.png" width="450"></a></p>
<h3 id="change-the-default-passwords">Change the default passwords<a class="headerlink" href="#change-the-default-passwords" title="Permanent link"></a></h3>
<p>For security's sake, it's best to change the default passwords immediately after running PiKVM for the first time.</p>
<div class="admonition danger">
<p class="admonition-title">Passwords are important!</p>
<p>Please ensure that you change <strong>both</strong> passwords: for Web UI access and for the Linux superuser (root).</p>
</div>
<p>To do that:</p>
<ol>
<li>
<p>On the initial dashboard screen, click the <strong>Terminal</strong> button to open the web terminal. You will see this command line interface:</p>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../v4/pikvm-web-terminal-start.png" data-desc-position="bottom"><img alt="PiKVM WebTerm" src="../v4/pikvm-web-terminal-start.png" width="450"></a></p>
</li>
<li>
<p>Gain Linux superuser privileges:</p>
<div class="highlight"><pre><span></span><code><span class="gp">$ </span>su<span class="w"> </span>-
</code></pre></div>
<p>When prompted for password, use <code>root</code>.</p>
</li>
<li>
<p>Run <code>rw</code> to change the access to the SD card to the write mode:</p>
<div class="highlight"><pre><span></span><code><span class="gp">[root@pikvm ~]# </span>rw
</code></pre></div>
</li>
<li>
<p>Change the password for the Linux superuser:</p>
<div class="highlight"><pre><span></span><code><span class="gp">[root@pikvm ~]# </span>passwd<span class="w"> </span>root
</code></pre></div>
<p>Submit the new password, retype it the second time to confirm, press <strong>Enter</strong>, and you should see this:</p>
<div class="highlight"><pre><span></span><code><span class="go">passwd: password updated successfully</span>
</code></pre></div>
</li>
<li>
<p>Change the password for web access:</p>
<div class="highlight"><pre><span></span><code><span class="gp">[root@pikvm ~]# </span>kvmd-htpasswd<span class="w"> </span><span class="nb">set</span><span class="w"> </span>admin
</code></pre></div>
<p>Submit the new password, retype it the second time to confirm, and press <strong>Enter</strong>.</p>
</li>
<li>
<p>Run <code>ro</code> to change the access to the SD card back to the read-only mode:</p>
<div class="highlight"><pre><span></span><code><span class="gp">[root@pikvm ~]# </span>ro
</code></pre></div>
</li>
<li>
<p>Press <strong>Ctrl+D</strong> or type "exit" and press <strong>Enter</strong> to drop the root privileges.</p>
</li>
<li>
<p>Go back one page in the browser. You should be back to the initial dashboard screen.</p>
</li>
</ol>
<h3 id="access-the-remote-system">Access the remote system<a class="headerlink" href="#access-the-remote-system" title="Permanent link"></a></h3>
<ol>
<li>
<p>On the initial dashboard screen, click the <strong>KVM</strong> button to access the remote host.</p>
</li>
<li>
<p>You should now see the host system's display and interact with it remotely using a keyboard and a mouse.</p>
<p><a class="glightbox" data-type="image" data-width="95%" data-height="auto" href="../v4/remote-screen.png" data-desc-position="bottom"><img alt="Work remotely" src="../v4/remote-screen.png" width="450"></a></p>
</li>
</ol>
<hr>
<h2 id="important-next-steps">Important next steps<a class="headerlink" href="#important-next-steps" title="Permanent link"></a></h2>
<ul>
<li>
<p><strong>We strongly recommend to update the PiKVM OS</strong> after the first launch:</p>
<details class="note">
<summary>Updating PiKVM OS</summary>
<p>To update, run following commands under the <code>root</code> user:</p>
<div class="highlight"><pre><span></span><code><span class="gp">[root@pikvm ~]# </span>pikvm-update
</code></pre></div>
<p>If you encounter an error like:</p>
<div class="highlight"><pre><span></span><code><span class="gp">[root@pikvm ~]# </span>pikvm-update
<span class="go">bash: pikvm-update: command not found</span>
</code></pre></div>
<p>It's most likely you have an old OS release. You can update the OS as follows:</p>
<div class="highlight"><pre><span></span><code><span class="gp">[root@pikvm ~]# </span>rw
<span class="gp">[root@pikvm ~]# </span>pacman<span class="w"> </span>-Syy
<span class="gp">[root@pikvm ~]# </span>pacman<span class="w"> </span>-S<span class="w"> </span>pikvm-os-updater
<span class="gp">[root@pikvm ~]# </span>pikvm-update
</code></pre></div>
<p>Next time you will be able to use the usual method with <code>pikvm-update</code>.</p>
</details>
</li>
<li>
<p>Learn about basics of <strong>PiKVM OS Configuration</strong>: where to find configs, how to edit the, etc.</p>
<details class="note">
<summary>Configuring PiKVM OS</summary>
<div class="admonition tip">
<p class="admonition-title">Need more info? We have it!</p>
<p>The following is a brief guide to configuring PiKVM.
For more information (including the basics of YAML syntax and how to use a text editor in the Linux console),
please refer to <a href="../config/">this page</a>.</p>
</div>
<p>Most of the PiKVM configuration files are located in the <code>/etc/kvmd</code> directory.</p>
<p>The <code>/usr/lib/kvmd/main.yaml</code> file defines the platform configuration, and <strong>you should never edit it</strong>.
To redefine system parameters use the file <code>/etc/kvmd/override.yaml</code>.
All other files that are also not recommended for editing have read-only permissions.</p>
<p>You can also create several files with the <code>.*yaml</code> suffix and put then into <code>/etc/kvmd/override.d</code> directory
to split your customization into logical parts.
The <code>override.yaml</code> file definitions takes precedence over the <code>override.d</code> directory.</p>
<p>A complete list of all parameters can be viewed using the <code>kvmd -m</code> command.</p>
<p>Files with the <code>*.yaml</code> suffix uses the <a href="https://docs.ansible.com/ansible/latest/reference_appendices/YAMLSyntax.html">YAML syntax</a>
and describes a parameter tree with key-value pairs of different types.
To define the parameters within one section, an indent of 4 spaces is used.
Comments starts with the <code>#</code> symbol.</p>
<div class="admonition warning">
<p class="admonition-title">Only 4 spaces should be used for indentation</p>
<p>Be careful when editing YAML and follow this rule.
Invalid indentation or tabs instead of spaces will cause an error when starting the services.</p>
</div>
<p>Sections under the same keys <strong>should be merged</strong>:</p>
<ul>
<li>
<p><strong>Wrong:</strong></p>
<div class="highlight"><pre><span></span><code><span class="nt">kvmd</span><span class="p">:</span>
<span class="w"> </span><span class="nt">gpio</span><span class="p">:</span>
<span class="w"> </span><span class="nt">drivers</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">...</span>
<span class="nt">kvmd</span><span class="p">:</span>
<span class="w"> </span><span class="nt">gpio</span><span class="p">:</span>
<span class="w"> </span><span class="nt">scheme</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">...</span>
</code></pre></div>
</li>
<li>
<p><strong>Correct:</strong></p>
<div class="highlight"><pre><span></span><code><span class="nt">kvmd</span><span class="p">:</span>
<span class="w"> </span><span class="nt">gpio</span><span class="p">:</span>
<span class="w"> </span><span class="nt">drivers</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">...</span>
<span class="w"> </span><span class="nt">scheme</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">...</span>
</code></pre></div>
</li>
</ul>
<p>In the <code>/etc/kvmd/meta.yaml</code> file you can specify some information regarding this PiKVM installation in an almost free YAML format.</p>
</details>
</li>
<li>
<p><strong>Get to know PiKVM Web UI</strong>: read <a href="../webui/">this help section</a> to better understand all the possibilities of the web user interface.</p>
</li>
<li>
<p>Tune the HDMI dongle capture device if you're using it:</p>
<details class="note">
<summary>Persistent HDMI cable connection with USB dongle</summary>
<p>Many USB video capture devices tell the server's video card that the HDMI cable is supposedly disconnected.
This may lead to the fact that if you boot the server without an active stream, the server will not detect
your capture card. This is easy to fix:</p>
<ul>
<li>
<p>Switch filesystem to RW-mode:
</p><div class="highlight"><pre><span></span><code><span class="gp">[root@pikvm ~]# </span>rw
</code></pre></div>
</li>
<li>
<p>Edit file <code>/etc/kvmd/override.yaml</code> and add these lines:
</p><div class="highlight"><pre><span></span><code><span class="nt">kvmd</span><span class="p">:</span>
<span class="w"> </span><span class="nt">streamer</span><span class="p">:</span>
<span class="w"> </span><span class="nt">forever</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">true</span>
<span class="w"> </span><span class="nt">cmd_append</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="nv">--slowdown</span><span class="p p-Indicator">]</span>
</code></pre></div>
</li>
<li>
<p>Finish:
</p><div class="highlight"><pre><span></span><code><span class="gp">[root@pikvm ~]# </span>ro
<span class="gp">[root@pikvm ~]# </span>systemctl<span class="w"> </span>restart<span class="w"> </span>kvmd
</code></pre></div>
</li>
<li>
<p>Check that everything is working.</p>
</li>
</ul>
</details>
</li>
</ul>
<hr>
<h2 id="further-recommendations">Further recommendations<a class="headerlink" href="#further-recommendations" title="Permanent link"></a></h2>
<ul>
<li><a href="../auth/">Harden the remote access</a> by enabling 2FA and setting session expiration time.</li>
<li>Configure access to PiKVM from the Internet using <a href="../port_forwarding/">port forwarding</a> or <a href="../tailscale/">Tailscale VPN</a>.</li>
<li><a href="../config/">Learn</a> how configuration files are structured.</li>
<li>Read how PiKVM is <a href="../id/">identified</a> on the target host.</li>
</ul>
<hr>
<h2 id="known-issues-and-limitations">Known issues and limitations<a class="headerlink" href="#known-issues-and-limitations" title="Permanent link"></a></h2>
<ul>
<li><strong>Max resolution</strong>.<br>PiKVM V1 with CSI bridge can only handle the maximum resolution 1920x1080@50Hz, 60Hz is not supported due hardware limitation. You can use any other resolution less than the specified one, for example 1280x720@60Hz. If you have any problems with video on CSI bridge, follow <a href="../edid/">this guide</a>.</li>
</ul>
<hr>
<h2 id="basic-troubleshooting">Basic troubleshooting<a class="headerlink" href="#basic-troubleshooting" title="Permanent link"></a></h2>
<ul>
<li>
<p>Ensure that you are using the right <a href="../flashing_os/">OS image</a> for your platform
by running the following command: <code>pacman -Q | grep kvmd-platform</code>.</p>
</li>
<li>
<p>If you are not getting a display, run the two following commands:</p>
<ul>
<li><code>dmesg | egrep 'tc35|1-1.4|uvc'</code></li>
<li><code>systemctl status kvmd-tc358743</code></li>
</ul>
<p>If you see a failed message on that output, be sure verify the orientation of the CSI cable or try reseating it.</p>
<p>Note that this is not a hotplug device, and you must first turn off the power.</p>
</li>
</ul>
<hr>
<h2 id="getting-user-support">Getting user support<a class="headerlink" href="#getting-user-support" title="Permanent link"></a></h2>
<p>If something doesn't work, check out our <a href="../faq/">FAQ</a>. Otherwise, head straight to our <a href="https://pikvm.org/support/">Support</a>.</p></div>
</article>
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