USER MANUAL
EMDCB
–
BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR
© 2019 EnOcean | www.enocean.com
EMDCB User Manual | v1.3 | August 2019 | Page 63/67
B.3
Intermediate parameters
The RFC3610 implementation used in EnOcean BLE products derives four internal parame-
ters
–
Nonce, A0, B0, B1 and B2
–
based on the telegram specific input data and the con-
stant internal parameters.
These variable internal parameters are described in Table 29 below. The values of these
parameters are calculated based on the input data given in chapter B.1.
Parameter
Comment / Description
Value in the example
Nonce
13 byte initialization vector based on
concatenation of 6 byte source address, 4
byte sequence counter and 3 byte 0x00
padding
C400000000E557E20100000000
A0
A0_Flag
followed by
Nonce
followed by 2
byte
0x00
01C400000000E557E201000000000000
B0
B0_Flag
followed by
Nonce
followed by 2
byte
0x00
(no message to encode)
49C400000000E557E201000000000000
B1
Input Length
followed by first 14 byte of
Input Data
001515FFDA0357E2010002AA44D60045
B2
Remaining
Input Data
(up to 16 byte) with
0x00
padding to reach 16 byte in total
35002002000000000000000000000000
Table 29
–
Intermediate parameters
