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KNX ADVANCED COURSE

Temperature is transmitted using a 2 byte Group Object with encoding 9.001,
DPT_Value_Temp or 9.002, DPT_Value_Tempd. These have a resolution of 0,01 °C or
0,01 K respectively.

Figure 54: Group Object in ETS for reading the current value of the temperature

Figure 55: Setting the deviation of the temperature sensor in ETS

6.2.2 Brightness sensor
A brightness sensor is also a widely used device, which senses the current brightness
value of an area and transmits it to the bus. This type of devices is mostly used for
switching or dimming lighting circuits in order to create an ambient living environment, but
also to save energy costs. There is a large variety of brightness sensors. They can be
classified according to their use, i.e. external or internal. Moreover, there are brightness
sensors that not only detect the brightness value, but also the position of the sun. This
function might be very useful when controlling the blinds of the facades of a building or the
angle of solar trackers, resulting in either proper shading and heating control or higher
energy production of solar panels.

Figure 56: Brightness sensor for external use and internal use

The brightness value is measured and expressed in lux and is transmitted using a 2 byte
Group Object with encoding 9.004, DPT_Value_Lux, which has a resolution of 0,01 Lux.

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