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User Manual May 2019 | Page 12/28
USER MANUAL
Energy Harvesting Magnet Contact Transmitter Module
STM 320 / STM 329 / STM 320U
(Stepcode DE and later)
Between the wake-up phases, the device is in sleep mode for minimum power consump-
tion.
3.3
Radio telegram
3.3.1
Default configuration and standard mode
STM 32x transmits a radio telegram according to EnOcean Equipment Profile
EEP D5-00-01 as defined in the EnOcean Equipment Profiles (EEP) specification.
http://www.enocean-alliance.org/eep/
By pressing the LRN button in standard mode a 1BS Teach-in telegram is transmitted.
By pressing the LRN button 1 s in standard mode a 4BS teach-in telegram is transmitted.
After pressing the LRN button for 5 seconds a signal telegram (data: 0x0E) will be sent and
the module enters the transport mode. For details see EnOcean Alliance EEP specifica-
tion(Stepcode >=DE). In this mode the module does not send telegrams.
For details please refer to the EnOcean Equipment Profiles specification.
http://www.enocean-alliance.org/eep/
3.3.2
Secure mode and secure telegram
In secure mode the payload content of the telegram is always protected with advanced se-
curity features. Normal operation telegram payload and also Teach-in telegram payload are
protected in the same way.
The security features used are defined by the Security Level format - SLF. This parameter
is set by default to following values (Stepcode >=DE):
24-bit RLC which starts from 0 at production
RLC sent explicitly
3-byte CMAC
VAES encryption
The security features are added to the communication by encapsulating the payload and
Teach-in telegram payload into a secured telegram. The payload itself is not changed and
corresponds to the standard mode payload like defined in chapter 3.3. EEP D5-00-01.
Please refer to the EnOcean Security Specification for details
http://www.enocean.com/en/security-specification/
Before changing the operating mode please make sure to clear the device from all
receivers which have been taught to work with this device before. Otherwise the
receiver will ignore the telegrams and the application will not work.
The flag for actual mode itself is stored in non-volatile memory. After power down
reset the previous selected mode is active. Therefore mode change is limited to 50
times. In normal application scenario only very few are required.
