User's Manual
USER MANUAL
© 2013 EnOcean | www.enocean.com TCM 300x / TCM 320x User Manual | Page 45/53
TCM 300 / TCM 300C / TCM 300U
TCM 320 / TCM 320C / TCM 320U
There are 4 types of ESP2 telegrams:
RRT - Receive Radio telegrams (from AIR to Serial)
TRT - Transmit Radio telegrams (from serial to air)
RCT – Receive Command Telegram (between module and host only serial)
TCT – Transmit Command Telegram (between module and host only serial)
A.1.3 Description of serial data structure
Bit 7 Bit 0
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
SYNC_BYTE 0..1 (8 bit each) Synchronization Bytes
H_SEQ (3 bit) Header identification (see table below)
LENGTH (5 bit) Number of octets following the header octet (11 dec)
ORG (8 bit) Type of telegram (see detailed description below)
DATA_BYTE 0..3 (8 bit each) Data bytes 0..3 (see detailed description below)
ID_BYTE 0..3 (8 bit each) 32-bit transmitter ID
4
For transmission of unique ID enter 0x0000_0000
STATUS (8 bit) Status field (see detailed description below)
CHECKSUM (8 bit) Checksum (Last LSB from addition of all octets except
sync bytes and checksum)
H_SEQ
Meaning
Mode
0b000
Unknown transmitter ID received
(serial telegram only if no ID has been learned so far!)
For RPS also:
o Known transmitter ID and unknown rocker
o U-message from known transmitter ID received
For HRC also:
o Known transmitter ID and unknown rocker
o Scene switch command (last three bits of ID 0b111) from
known transmitter ID (only first 29 bits are compared!)
Operating
Mode
0b001
For 1BS and 4BS: Known transmitter ID received
For RPS: Known transmitter ID and at least 1 known rocker (1
or 2 rockers operated)
For HRC: Known transmitter ID and known rocker
Operating
Mode
0b010
New transmitter learned (If a switch telegram is received (RPS or HRC),
the rocker code (RID) is stored together with the ID.)
Learn Mode
4
This module allows using a unique ID or one of 128 IDs starting from BaseID. See A.3.1.