# Basic usage

OpenHydroponics is designed to be modular and flexible, allowing you to extend its functionality as needed.

All OpenHydroponics setups creates a network with one or several nodes. Normally a node is a device connected to each other with a cable. The nodes may have one or several endpoints extending the functionality of the node. The endpoints may be sensors, actuators or other devices.


```{graphviz}
digraph OverviewDiagram {
    rankdir=LR;

    RootMaster [
        shape=record,
        label="{ { <root>RootMaster } | { <e1> endpoint 1 | <e2> endpoint 2 | <e3> endpoint 3 | <e4> endpoint 4 } }"
    ];

    RootSense [
        shape=record,
        label="{ { <root>RootSense } | { <e1> endpoint 1 | <e2> endpoint 2 | <e3> endpoint 3 } }"
    ];

    node [shape=ellipse];

    RootSense:e1 -> pH;
    RootSense:e2 -> "Dissolved Oxygen";
    RootSense:e3 -> ORP;


    RootMaster:e1 -> Temperature;
    RootMaster:e2 -> Humidity;
    RootMaster:e3 -> Pump;
    RootMaster:e4 -> EC;


    RootMaster -> RootSense:root [
        label="Network";
        minlen=2;
    ];
}
```