The dashboard can be viewed by admin users and invited users. The dashboard includes various charts to display live sensor data values. An example dashboard is shown below.
Image: UrsaLeo Cloud Dashboard (top 3 sensors view)
For this tutorial, we will use the temperature sensor as an example.
Use of sensors to measure temperature is very common. The temperature chart is shown in the first position in the dashboard (for UrsaLeo gateway users). You can customize how data appears on this chart by clicking the Sensor Preferences cog in the upper right corner of the chart.
Only admins have access to these preferences. Invited users can only view the data, using the setting specified by the admin of the engine. When a conversion or calibration is set, the Sensor Preferences cog will turn blue, as noted in the top image.
Image: A modified sensor preferences panel for a temperature sensor
Sensor Preferences Overview
The Conversion Type dropdown menu allows you to change from Celsius (default) to Fahrenheit quickly.
Unit of Measurement
Use this text field to specify a custom unit of measurement label. This field defaults to 'C' for Celsius and will automatically be set to 'F' for Fahrenheit when the conversion type is selected as CelsiusToFahrenheit.
Minimum and Maximum
These text fields allow the user to specify the scale range displayed within the temperature chart. You can alter the min and max values of all sensors by clicking the preference cog in the upper right corner of the chart. Click SAVE to retain values. To return to the default settings, click RESET TO DEFAULTS.
Careful consideration should be given to measuring the temperature of an object or its ambient environment. Calibration allows the user to adjust the reported sensor value to address issues such as the sensor being located next to a heat or cooling source or poor accuracy of the individual temperature sensor.
To learn more about accurately measuring temperature, please refer to this white paper from Silicon Labs: Measuring Temperature Accurately with Semiconductor Sensors
To adjust the calibration, simply enter in the operator (+ or -) and the value you would like to adjust up or down. For example, to add two degrees to the raw temperature reading, type +2.