Setup the Ambient humidity sensor Tibbit in visual LTPS Web Configurator or as described in Configuring TPS Agent:
After writing settings and reboot LTPS Tibbits tab with subtab Sensors will appear:
The temperature in Celsius degrees, the humidity percents RH.
To increase the accuracy of measurements, remove tibbit case.
The value are updated during AggreGate Client synchronization (3 minutes by default). You can reduce synchronization period or force synchronize to get actual values.