The “About” button 
can be clicked to obtain a summary of this application.
4.1.1.Configuration
Click on the “Configuration” button 
and the settings dialog will appear.
Temperature unit
Celsius or Fahrenheit can be selected.
Time interval
The timestamp of each node will be checked regularly to see if any message has been received within the given time interval. If the elapsed time is longer than specified, the Node will be removed from the screen.
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