Art. No. 11134
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ESERA GmbH, ESERA-Automation 2020
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11134 V2.0 R1.0 Manual
Page 3 of 6
8
Integration in IP-Symcon
On our website, we provide ESERA IP-Symcon software modules for easy integration of the sensor into IP-
Symcon via 1-Wire Controller / 1-Wire Gateway. This means that no scripts are required any more.
Details can be found on the ESERA website under "Compatible controllers / Centralized IP-Symcon integration".
https://www.esera.de/kompatible-steuerungen-zentralen/ip-symcon-integration/
A script for the conventional connection via 1-Wire Bus Coupler can be found in the article download area. Details
can be found in the example script.
9
Integration in Loxone
Via the shop we provide a sample project for reading of temperature, humidity, dew point, brightness and
operating voltage via 1-Wire Controller / 1-Wire Gateway.
Details see here:
https://www.esera.de/service-support/kompatible-steuerungen-zentralen/loxone-integration/
10
Integration in FHEM
For the integration into the open source automation software FHEM we provide a software module for easy
integration of the sensor into FHEM via 1-Wire Controller / 1-Wire Gateway. Thus no more evaluation scripts are
necessary.
Details can be found on the ESERA website at
„Kompatible Steuerungen / Zentralen/FHEM-Integration“
https://www.esera.de/service-support/kompatible-steuerungen-zentralen/fhem-integration/
11
Manual calculation of sensor values
The following formula can be used to evaluate the humidity sensor.
VDD = operating voltage (5V), VAD = humidity sensor, analog value of DS2438, Xsense = light sensor, analog
value of DS2438.
Humidity calculation
Offset = 0.847847 (Zero Offset V), slope = 29.404604 (Slope: mV/ %RH)
Srh = (VAD_new - offset) / (slope / 1000)
rFH = (Srh + 2)/ ((1.0305 + (0.000044 * temperature) - (0.0000011 * temperature x 10²)))
For Loxone control:
I1 = VAD-value, I3 = Temperature
((((5/I2*I1)-0,847847)/(29,404604/1000))+2)/((1,0305+(0,000044*I3)-(0,0000011*I3^2)))
Brightness calculation
Xsense in Volt, Factor = 25600
Correction for operating voltage fluctuations: Xsense = (5 / VDD) * Xsense
Brightness (LUX) = (0,223V - Xsense) * Factor
Note on brightness measurement:
It should be noted that the placement of light sources in relation to the angle of incidence of the Multisensor may
cause considerable deviations in the brightness readings of hand-held brightness meters.
Brightness control:
In the case of illumination with fluorescent or LED lamps, the value may additionally fluctuate. A living room
brightness control is usually impaired by strongly changing lighting conditions, e.g. shadows cast by people in the
room and the resulting fluctuations in sensor light values, and a well-functioning control function is often difficult to
implement. This is largely due to the unfavourable positioning in the light switch area for measuring the brightness
of the Multisensor.
