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Bluetooth HID
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Using Bluetooth HID
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Mass Storage Drive
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Using VNC
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Multiport KVM-over-IP
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Wake-on-LAN the server
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IPMI & Redfish integration
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Persistent storage
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Configuring the OS
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Using Bluetooth HID
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<div><h1 id="bluetooth-hid">Bluetooth HID<a class="headerlink" href="#bluetooth-hid" title="Permanent link"></a></h1>
<p>PiKVM is able to emulate a Bluetooth keyboard &amp; mouse.
This is not the main case of using PiKVM since you still need it to pair with a remote host, but can be used for something like mobile KVM.</p>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Using Bluetooth HID requires additional configuration of the operating system. For v2+, this means losing the UART port, since it will be used by Bluetooth. Also, Bluetooth operation was tested only on RPi4 and v2+ platform. Other boards may require different system service settings. Making the required changes for BT to work will also disable normal KB/MOUSE functionality therefor this will need to be disabled before normal operation can occur.</p>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Bluetooth mouse can work only in <a href="../mouse/">relative mode</a>. The reason is that many Bluetooth host drivers do not correctly implement HID descriptors. Horizontal scrolling is not supported for the same reason.</p>
</div>
<h2 id="configuring-the-os">Configuring the OS<a class="headerlink" href="#configuring-the-os" title="Permanent link"></a></h2>
<ol>
<li>
<p>Switch filesystem to RW-mode and install some packages:</p>
<div class="highlight"><pre><span></span><code># rw
# pacman -Syy
# pacman -Su bluez bluez-utils raspberrypi-bluetooth
</code></pre></div>
</li>
<li>
<p>Edit <code>/boot/config.txt</code> and comment these lines:</p>
<div class="highlight"><pre><span></span><code>#enable_uart=1
#dtoverlay=disable-bt
</code></pre></div>
</li>
<li>
<p>Create an empty directory <code>/var/lib/bluetooth</code> and add mountpoint to <code>/etc/fstab</code>:</p>
<div class="highlight"><pre><span></span><code># mkdir /var/lib/bluetooth
# echo 'tmpfs /var/lib/bluetooth tmpfs nodev,nosuid,mode=0755 0 0' &gt;&gt; /etc/fstab
</code></pre></div>
</li>
<li>
<p>Override and enable the services:</p>
<div class="highlight"><pre><span></span><code># mkdir /etc/systemd/system/bluetooth.service.d
# cat &lt;&lt; EOF &gt; /etc/systemd/system/bluetooth.service.d/override.conf
[Service]
ExecStart=
ExecStart=/usr/lib/bluetooth/bluetoothd --noplugin=*
EOF
# systemctl enable bluetooth
# systemctl enable raspberrypi-btuart
</code></pre></div>
</li>
<li>
<p>Override <code>kvmd</code> service:</p>
<div class="highlight"><pre><span></span><code># mkdir /etc/systemd/system/kvmd.service.d
# cat &lt;&lt; EOF &gt; /etc/systemd/system/kvmd.service.d/override.conf
[Service]
AmbientCapabilities=CAP_NET_RAW CAP_NET_BIND_SERVICE CAP_SYS_ADMIN CAP_SETUID CAP_SETGID CAP_CHOWN
CapabilityBoundingSet=CAP_NET_RAW CAP_NET_BIND_SERVICE CAP_SYS_ADMIN CAP_SETUID CAP_SETGID CAP_CHOWN
EOF
</code></pre></div>
</li>
<li>
<p>Add following lines to <code>/etc/kvmd/override.yaml</code>:</p>
<div class="highlight"><pre><span></span><code><span class="nt">kvmd</span><span class="p">:</span>
<span class="w"> </span><span class="nt">hid</span><span class="p">:</span>
<span class="w"> </span><span class="nt">type</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">bt</span>
</code></pre></div>
</li>
<li>
<p>Perform <code>reboot</code>.</p>
</li>
<li>
<p>To reverse, uncomment lines from Step 2 and remove lines in Step 6, and <code>reboot</code>.</p>
</li>
</ol>
<h2 id="using-bluetooth-hid">Using Bluetooth HID<a class="headerlink" href="#using-bluetooth-hid" title="Permanent link"></a></h2>
<ul>
<li>
<p>After a reboot, the PiKVM will be ready for detection and pairing with no auth. You will see the <code>PiKVM HID</code> device.</p>
</li>
<li>
<p>Once the server is connected, PiKVM will no longer be discoverable and pairable to other clients until you unpair the server.</p>
</li>
<li>
<p>If something went wrong, use the web menu <code>System -&gt; Reset keyboard &amp; mouse</code>. This will cause unpair the device and switch the PiKVM to public mode before the first client is connected.</p>
</li>
</ul></div>
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