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EnOcean Radio-Protocol?


Facts:

  • 868.3 MHz ASK
  • unidirectional
  • 3 identical telegrams each event

Environment:


A Switch PTM200DA gets pressed and received by a Transceiver TCM120.

Decoded data out of the Transceiver:


a55a 0b05 3000 0000 0011 3168 301a

This is documented in manual (2.4.3) and resolves as follows:

SYNC_BYTE1 (A5 Hex)
SYNC_BYTE0 (5A Hex)
H_SEQ LENGTH
ORG
DATA_BYTE3
DATA_BYTE2
DATA_BYTE1
DATA_BYTE0
ID_BYTE3
ID_BYTE2
ID_BYTE1
ID_BYTE0
STATUS
CHECKSUM

Raw air data for the decoded telegram above

High-Low-High-Low-?... micro seconds

21 7 4 8 4 8 4 11 8 8 4 15 28 23 5 7 20 8 19 8 19 8 20 8 20 8 4 7 4 8 20 15 12 23 5 7 20 15 4 8 4 7 12 15 12 7 4 15 12 16 4 - 586
18 7 4 8 4 8 4 11 8 8 4 7 4 16 12 8 20 8 19 8 19 8 20 8 20 8 20 8 4 7 4 8 20 15 12 23 5 7 20 16 4 8 4 7 12 15 12 8 4 8 4 7 4 16 4 - 576
18 7 4 8 4 8 4 11 8 8 4 15 28 23 5 7 20 8 19 8 19 8 19 8 20 8 4 8 4 7 20 16 12 23 5 7 20 16 4 8 4 7 12 15 12 8 4 15 12 16 4 - 583
18 7 4 8 4 8 4 11 8 8 4 7 4 16 12 8 20 8 20 8 20 8 20 8 20 8 20 8 4 7 4 8 19 16 12 23 5 7 20 16 4 8 4 7 12 15 12 8 4 8 4 7 4 17 4 - 577
18 7 4 8 4 8 4 12 8 8 4 15 28 23 5 7 20 8 20 8 20 8 19 8 20 8 4 7 4 8 20 15 12 23 4 8 20 16 4 8 4 7 12 15 12 8 4 15 12 16 4 - 583
19 8 4 8 4 8 4 11 8 8 4 7 4 16 12 8 20 8 20 8 19 8 20 8 19 8 19 8 4 8 4 7 20 16 12 23 5 7 20 16 4 8 4 7 12 15 12 8 4 8 4 7 4 16 4 - 577
18 7 4 8 4 8 4 11 8 8 4 15 28 23 5 7 20 8 19 8 19 8 19 8 19 8 4 7 4 8 20 15 12 23 5 7 20 16 4 8 4 7 12 15 12 8 4 15 12 16 4 - 584
17 7 4 8 4 8 4 12 8 8 4 8 4 16 12 8 20 8 20 8 19 8 20 8 20 8 20 8 4 8 4 8 20 15 12 23 5 7 20 16 4 8 4 7 12 15 12 8 4 8 4 8 4 16 4 - 575
18 7 4 8 4 8 4 12 8 8 4 15 28 23 4 8 20 8 20 8 20 8 19 8 19 8 4 8 4 8 20 16 12 23 5 7 20 16 4 8 4 7 12 15 12 8 4 15 12 17 4 - 584
18 7 4 8 4 8 4 11 8 8 4 7 4 16 12 8 20 8 20 8 19 8 20 8 20 8 19 8 4 7 4 8 19 16 12 23 5 7 20 16 4 8 4 7 12 15 12 8 4 8 4 7 4 17 4 - 576

(Press button / release button aso.)

Bit telegram 8,33us period


11110010010010001100100001111111000000100111110011111001111100111110011111001001001111100001110000001001111100001001001110000111001000011100001
111100100100100011001001000011100111110011111001111100111110011111001111100100100111110000111000000100111110000100100111000011100100100100001
11110010010010001100100001111111000000100111110011111001111100111110011111001001001111100001110000001001111100001001001110000111001000011100001
111100100100100011001001000011100111110011111001111100111110011111001111100100100111110000111000000100111110000100100111000011100100100100001
11110010010010001100100001111111000000100111110011111001111100111110011111001001001111100001110000001001111100001001001110000111001000011100001
111100100100100011001001000011100111110011111001111100111110011111001111100100100111110000111000000100111110000100100111000011100100100100001

(Press button / release button aso.)

Findings:
  • message length 600 usec
  • first and second pause 3.3ms
  • nearly identical messages => no rolling code

Created by: avrfreak last modification: Thursday 12 of March, 2009 [22:56:47 UTC] by avrfreak


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