B. &Cube
The &Cube is a device software platform (i.e., a middleware),
which can be installed into IoT gateways. As in
the Mobius, the &Cube is also designed to comply with the
oneM2M standards, and thus send the collected data from
physical devices to the Mobius via standardized REST APIs.
The &Cube has been implemented as a Java program so that
it could be easily ported on any type of embedded machines
installed with the Java virtual machine (JVM). In addition, the
&Cube supports various protocol bindings including HTTP,
MQTT, and CoAP. For our connected farm, we have installed
the &Cube in a Raspberry-Pi, which is a single-board Linuxinstalled
computer.