node-red-contrib-adxl-vibration-fft/dist/locales/en-US/adxl-fft.html

Node-RED nodes for Analog Devices' ADXL series FFT(Fast Fourier Transform) stream data parser

<script type="text/x-red" data-help-name="ADXL100x FFT in"> <p>
This node emits the vibration measurement values applied Fast Fourier Transform (FFT).
FFT is performed on the edge node (microcontroller) rather than in this node.
</p>
<h3>Outputs</h3>
<p>
  There are 4 output formats.
  You can specify the format type by choosing <code>FFT Value Format</code>.
</p>
<h4>Peak value array</h4>
<pre>
[
  {
    "frequency": 6.425000000000001,
    "amplitude": -86.24041575741913
  },
  {
    "frequency": 6.425000000000001,
    "amplitude": -84.36345586590383
  },
  ... (length: # of Peak Values)
]</pre>
<h4>Dashboard Charts(FFT values and peaks)</h4>
<p>
  The following output can be found when <code># of Peak Values</code> is 1.
  This format is <code>chart</code> node friednly so you can direcly
  provide this output to the node as the input values to draw a chart on
  the dashboard.
</p>
<pre>
[
  {
    "series": [
      "FFT", "Peak1"
    ],
    "data": [
      [-33.13674703428713, -39.12668181549303, ... (length:800) ],
      [0, 0, 0, ... , -32.13674703428713, ... (length:800) ]
    ],
    "labels": [
      ["0kHz", "0kHz", "0kHz", ..., "1kHz", ... (length:800) ]
    ]
  }
]</pre>
<h4>Dashboard Charts(FFT values)</h4>
<p>
  The format contains only FFT values.
  This format is <code>chart</code> node friednly so you can direcly
  provide this output to the node as the input values to draw a chart on
  the dashboard.
</p>
<pre>
[
  {
    "series": [
      "FFT"
    ],
    "data": [
      [-33.13674703428713, -39.12668181549303, ... (length:800) ],
    ],
    "labels": [
      ["0kHz", "0kHz", "0kHz", ..., "1kHz", ... (length:800) ]
    ]
  }
]</pre>
<h4>Peak values with all FFT values</h4>
<pre>
{
  "peaks": [
    {
      "frequency": 6.425000000000001,
      "amplitude": -86.24041575741913
    },
    ... (length: # of Peak Values)
  ],
  "fft": [
    [-33.13674703428713, -39.12668181549303, ... (length:800) ],
  ]
}
</pre>

<h4>Notice</h4>
<p>
  Node icon was designed by <a href="https://icons8.com">icons8</a>.
</p> </script> <script type="text/x-red" data-help-name="ADXL100x FFT"> <p>
Configure a FFT data source for the edge node (microcontroller) to communicate.
</p>
<ul>
  <dt>Enable this config</dt>
  <dd>Turn of to disable this serial port as a FFT source.</dd>
  <dt>Topic</dt>
  <dd>You can set <code>msg.topic</code> value if enter here (optional).</dd>
  <dt>Data I/O Port</dt>
  <dd>Choose USB serial port.</dd>
  <dt>Emit all FFT values</dt>
  <dd>Turn off if you would like to suppress the bulk data emission from this source.</dd>
</ul> </script>