See the image at the top of the features page for an example.
Irrigation cycles automatically adjust to the changing needs of the plants or trees being monitored.
The images below illustrate an irrigation cycle that includes a prescribed dry period before irrigation begins for plants, such as succulents, that require one.
The red LED, seen inside the controller, indicates that the controller is counting-down, the prescribed dry period, before irrigation begins.
Once both the lower and upper moisture sensors report that the soil surrounding them is sufficiently dry and that any dry period countdown has expired irrigation begins and is represented by the lit blue LED.
Once moisture reaches the upper moisture sensor, located half-way between the bottom sensor and the surface, the yellow LED lights.
This is only significant if a sufficient amount of moisture reaches the upper sensor during a dry period countdown, perhaps due to rain, at which time the dry period countdown is canceled and the controller goes back into sensor monitoring mode.
Once moisture reaches the lower moisture sensor, located at the base of the plant's root ball, the green LED lights and irrigation terminates.
During a normal irrigation cycle, once moisture reaches the bottom sensor both the yellow and green LEDs will be lit.
Should a sufficient amount of moisture reaches the lower sensor during a dry period countdown, perhaps due to a broken pipe, the dry period countdown is the canceled and the controller goes back into sensor monitoring mode.
As shown here, in this configuration a standard garden hose, on the left, supplies irrigation water to the valve that connects to a soaker hose on the right.
The network is electrically and physically separate from the irrigation controllers and is disconnected from the Internet. It features all of the services and servers usually associated with the Internet including: two Domain Name Servers (one for the top level domain, the other for the IoT domain), a Web Server, a Collaboration Server, a Network Attached Storage server, three Application Servers, two Database Servers (one Document Orientated and the other Relational).
At least one application server collects sensor data and provides it to at least one web server, and optionally to at least one database server, as shown below.
At a minimum, only one web server and one sensor data controller are necessary for sensor monitoring.