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Chapter 2. Related Work/Fundamentals 21

data between its interfaces, for example USB to SPI. Due to the integrated WLAN module,

it can be accessed and controlled via internet without the need of an external computer. It

has a low power consumption, an average of 0.5 W.

Figure 2.13.: The WiﬁControl 433.

2.3.2. Comparison

There are still much more devices on the market than the ones presented, but these give a

good overview of available possibilities. Whatever system you choose, depends on the individual

requirements and the type of HA system available. It is not possible to generalize. Basic protocol

translation can be performed by almost every gateway. Selection is consequently much less critical

than the selection of a HA system. For most users, the available software is most important,

whereas it is essential for developers to be able to change and use the gateways without the

supplied software. Table 2.2 summarizes the presented systems.

RFXtrx433 TellStick CUL WiﬁControl433

supported number of HA systems high medium low low

HE support yes no yes no

IT support yes yes yes yes

standalone no no no yes

open-source ﬁrmware no no yes yes

prize medium low medium low

Table 2.2.: The diﬀerences between the presented gateways.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 94 95

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RFXCOM RFXtrx433 Especificaciones Pagina 28