USER MANUAL
STM 550 / EMSI
–
ENOCEAN MULTISENSOR FOR IOT APPLICATIONS
© 2020 EnOcean | www.enocean.com F-710-017, V1.0
STM 550 / EMSI User Manual | v1.3 | September 2020 | Page 13/97
2.2.5
Illumination test mode
During installation, STM 550 can measure and report the amount of ambient light available
at its solar cell in order to determine a suitable installation location as discussed in chapter
11.5.
Upon activation of light test mode, STM 550 will first wait for 15 seconds so that the installer
can leave the area to ensure a relevant measurement result.
After that, STM 550 will take measurements of the ambient light level using its solar cell
every 5 seconds for a period of one minute and compute the average illumination based on
those measurements.
The computed average illumination is then available in the NFC register ILLUMINA-
TION_TEST_RESULT as described in chapter 9.5.28.
Illumination test mode can be selected using the MODE field of the FUNCTIONAL_MODE NFC
register as described in chapter 9.5.11.
2.2.6
Acceleration test mode
During installation, STM 550 can visually indicate if detected acceleration exceeds the con-
figured threshold. This provides quick visual feedback about the correct installation as dis-
cussed in chapter 11.3.
Upon activation of acceleration test mode, STM 550 will periodically (approximately every 3
seconds) measure acceleration vector changes and blink the LED whenever this change ex-
ceeds the threshold configured using the ACCELERATION_THRESHOLD register as described
in chapter 9.5.21.
Acceleration test mode can be selected using the MODE field of the FUNCTIONAL_MODE NFC
register as described in chapter 9.5.11 or using the LRN button as described in chapter 4.2.
2.2.7
Factory reset mode
STM 550 can be reset to its standard settings using factory reset mode. Upon entering this
mode, STM 550 will reset all configuration registers to their default settings and then restart
operation in standard operation mode.
Factory reset mode can be selected using the LRN button as described in chapter 4.1 or using
the MODE field of the FUNCTIONAL_MODE NFC register as described in chapter 9.5.11.