User's Manual
Table Of Contents
- 1 General description
- 2 Functional overview
- 2.1 Product description
- 2.2 Functional modes
- 2.3 Reporting interval
- 2.3.1 Energy considerations
- 2.3.2 Standard reporting interval
- 2.3.3 Illumination-controlled reporting interval
- 2.3.4 Temperature-controlled reporting interval
- 2.3.5 Humidity-controlled reporting interval
- 2.3.6 Acceleration-controlled reporting interval
- 2.3.7 Magnet contact sensor-controlled reporting interval
- 2.3.8 Arbitration between reporting intervals
- 3 Sensor functionality
- 4 Product interface
- 5 Radio communication
- 6 Security
- 7 Commissioning
- 8 NFC interface
- 9 NFC registers
- 9.1 NFC memory areas
- 9.2 Device identification NDEF
- 9.3 User information NDEF
- 9.4 NFC HEADER
- 9.5 CONFIGURATION
- 9.5.1 Using the NFC configuration functionality
- 9.5.2 CONFIGURATION area structure
- 9.5.3 NFC_PIN_CODE
- 9.5.4 PRODUCT_ID
- 9.5.5 USER_KEY
- 9.5.6 SECURITY_KEY_MODE
- 9.5.7 SECURITY_MODE
- 9.5.8 EEP
- 9.5.9 SIGNAL
- 9.5.10 LED_MODE
- 9.5.11 FUNCTIONAL_MODE
- 9.5.12 STANDARD_TX_INTERVAL
- 9.5.13 THRESHOLD_CFG1
- 9.5.14 THRESHOLD_CFG2
- 9.5.15 LIGHT_SENSOR_CFG
- 9.5.16 ACC_SENSOR_CFG
- 9.5.17 SOLAR_THRESHOLD
- 9.5.18 SOLAR_TX_INTERVAL
- 9.5.19 LIGHT_THRESHOLD
- 9.5.20 LIGHT_TX_INTERVAL
- 9.5.21 ACCELERATION_THRESHOLD
- 9.5.22 ACCELERATION_TX_INTERVAL
- 9.5.23 TEMPERATURE_THRESHOLD
- 9.5.24 TEMPERATURE_TX_INTERVAL
- 9.5.25 HUMIDITY_THRESHOLD
- 9.5.26 HUMIDITY_TX_INTERVAL
- 9.5.27 MAGNET_CONTACT_TX_INTERVAL
- 9.5.28 ILLUMINATION_TEST_RESULT
- 9.6 USER DATA
- 10 Mechanical interface
- 11 Installation recommendations
- 12 Regulatory notes
- 13 Product history
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 | v1.4 | November 2020 | Page 39/97
6.3 STM 550 security implementation
STM 550 supports both standard and high security modes as defined by EnOcean Alliance.
The security mode can be selected both via the LRN button and via the NFC interface.
For high security mode, the default security level format (SLF) is set to use a 4 byte sequence
counter to generate a 4 byte signature.
For backwards compatibility with legacy systems, it is possible to select via NFC a legacy
mode using a 3 byte sequence counter to generate a 3 byte signature.
STM 550 will use secure chained telegrams (SEC_CDM) if high security mode is used and the
telegram payload (including rolling code and CMAC) exceeds 14 byte.