Hi,
I have a greenhouse with 30 moisture sensors. I want to show only the average soil moisture readings from the 30 sensors at any given time, so I need only one dashboard chart that shows the average reading from 30 sensors over time. [ I will also create a blueprint dashboard to see battery level, moisture, temperature, conductivity values for each sensor].

Need to set the alert level for low soil moisture based on the average soil moisture value for the 30 sensors.

How do I do this? Thanks in advance for all the suggestions.