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<title>JMRI: OpenLCB Hub Control</title>
<meta name="author" content="Bob Jacobsen">
<meta name="author" content="Steve Young">
<meta name="keywords" content="JMRI Openlcb hub gridconnect can frame server">
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<h1>OpenLCB Hub Control</h1>
<a href="OpenLCB_Hub_Control_464x245.png"><img src="OpenLCB_Hub_Control_523x232.png" width="523" height="232"
alt="OpenLCB Hub Control" class="floatRight"></a><br>
<p>The "OpenLCB Hub Control" tool enables a physical OpenLCB connection to be shared on a
Network Connection.</p>
<p>The window displays the IP address and port of the Hub, along with client connection and disconnections.</p>
<p>If IP addresses are flagged as Loopback or LinkLocal, this is indicated.</p>
<p>The OpenLCB Hub can be opened by adding as a system startup action.</p>
<p>This page can be opened from the Hub Control via Help > Window Help .</p>
<h3 id="lineTermination">Line Terminations</h3>
<p>You should not normally need to change these settings, however if you do so, you are advised to restart JMRI.</p>
<h4>Send Line Termination</h4>
<p>Hub sends CAN Frames in the GridConnect Serial format, and when Send Line Termination is enabled ( OpenLCB default ),
is followed by a line termination character ( CR/LF ).</p>
<h4>Require Line Termination</h4>
<p>When unchecked ( default ), Hub reads the GridConnect content between the start of the Serial Format
&quot; <code>:</code> &quot;, and end of format &quot; <code>;</code> &quot; characters.
<br>Any other characters, including line termination characters are silently ignored.</p>
<p>When enabled, Hub receives CAN Frames whenever a line termination is received in the network stream.</p>
<h4>Also see</h4>
<p>The Grid Connect Serial specification is the documentation for their CANUSB Interface,
see section 2.7.1 Message String Syntax in the pdf at
<a href="https://www.gridconnect.com/collections/can-pc-interfaces/products/canusb-com-fd-converter-usb-can-fd-interface#documents-and-drivers"
>gridconnect.com</a>.
<br>Line terminations can be enabled / disabled in this USB devices output via a device setting.</p>
<p>The <a href="../../../can/cbus/swing/hubpane/CbusHubPane.shtml">CBUS&reg; Hub Control</a> borrows code extensively from OpenLCB Hub Control.</p>
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