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<p class="MsoNormal">Thank you, David. This looks good! Do you think you could add in a time series line plot of the Bx, By, and Bz coordinates? I think this would be useful to have right away, even for diagnostics.<o:p></o:p></p>
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<p class="MsoNormal">73 de Nathaniel W2NAF<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">TangerineSDR <tangerinesdr-bounces@lists.tapr.org> on behalf of TangerineSDR Listserv <tangerinesdr@lists.tapr.org><br>
<b>Reply-To: </b>TangerineSDR Listserv <tangerinesdr@lists.tapr.org><br>
<b>Date: </b>Tuesday, December 3, 2019 at 1:49 PM<br>
<b>To: </b>TangerineSDR Listserv <tangerinesdr@lists.tapr.org><br>
<b>Cc: </b>David Witten <wittend@wwrinc.com><br>
<b>Subject: </b>[TangerineSDR] Web presentation of magnetometer data to multiple clients<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">All,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">This is a work in progress, for my own use right now. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">It shows presentation of magnetometer data in a web browser. Ignore the actual data shown, it properly signed quantities.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">The page is served by HTTP, but the sensor data is sent via Websockets. This is done using a golang server (minimal) that launches a program written in C that interrogates the I2C channel. When the golang
program detects a browser connection, it serves the web page. The web page opens a Websockets connection and streams the magnetometer data encapsulated in JSON to the browser client.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">No web server, as such, is used. Only one HTTP/HTTPs request is used. There are other possible ways to do this, but this one works well for my purposes. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">The intent is to have each local host send its lat/long and ip address on startup. The locations would be indicated on the map. Clicking on the marker would open a connection to that particular SBC.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Data logging locally and remotely could both be controlled.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Again this is just eye candy, showing what can be done. No frameworks, user's language of choice for the service.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Dave Witten<o:p></o:p></span></p>
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