USER MANUAL
EMDCB
–
BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR
© 2019 EnOcean | www.enocean.com
EMDCB User Manual | v1.3 | August 2019 | Page 16/67
2.6
Illumination measurement
EMDCB integrates a dedicated light level sensor used to accurately measure and report the
light level directly underneath (e.g. on the desk surface).
In addition to the light sensor, EMDCB provides the option to use the calibrated solar cell
response to report wide area illumination. This can be used both as input for lighting con-
trol systems (e.g. to report ambient light for daylighting applications) and to verify the
available light level is sufficient for self-powered operation of EMDCB.
2.6.1
Light level sensor
EMDCB contains a dedicated humidity sensor with narrow aperture and a spectral response
optimized to mimic the human eye’s perception of ambient light
. This light sensor reports
the light level directly underneath the sensor (spot measurement).
Figure 6 shows the spectrum response of the EMDCB illumination sensor compared to that
of the human eye.
Figure 6
–
Spectrum response of EMDCB illumination sensor
2.6.2
Solar cell
EMDCB can report the light level by measuring the energy generated by the solar cell. This
can be used both to ensure that a sufficient ambient light is available to power the device
and to measure incoming light if the solar cell is oriented towards the window. Reporting of
the solar cell light level can be enabled and disabled via the NFC interface as described in
chapter 7.6.8.1.
