RFXCOM RFXtrx433 Especificaciones descargar pdf (Pagina 38)

Chapter 3. Concept 31

gateway_driver

wlan

usb

database

devicemanager

protocol

data

devicelist

visualization &

namespace

n/devicelist

Hardware Protocol Device Namespace

IT 000AA8 Protocol: IT

Code: 000AA8

name: table_light

type: light

state: on

last seen: today, 12:20:48

location: myroom

name: myroom/table_light

state: on

database

requests

n/requests

Figure 3.4.: The information chain in more detail: Each node abstracts the data a bit further

allowing to convert the initial binary data into human readable information.

the data output, because only the most important information, like the namespace (location),

the device name and its state, are displayed. The full device information can still be accessed via

device manager.

Figure 3.5 on the following page takes the previous example to a deeper level. The device manager

distinguishes between receivers and transmitters; therefore its database is divided in two parts: a

database for the receiver and a database for the transmitter. The separation sympathizes with IT

and HE, where devices can be either transmitter or receiver and facilitates device management as

the software abstraction can better represent the reality.

In some respects, the data structure of transmitters and receivers share some common information,

but they also contain special details. The common information is:

• Name: A string representing a device. Each name is unique, so that each entry can be

addressed individually and there are no ambiguities.

• ID: The unique id of a device. Can be used instead of the name for addressing database

entries. Mainly used for speeding up the internal lookup functions.

• Description: An optional string describing the device.

• Protocol: The used HA system. Currently HE or IT.

• Type: A string representing the type of a device.

Receivers have some additional information:

• State: Current state of the receiver. Can be on, oﬀ or unknown.

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