EnOcean GmbH STM300C Manual De Usuario
USER MANUAL V0.82
© 2010 EnOcean | www.enocean.com
TCM 300 / 300C / 320 / 320C User Manual V0.82 | Page 35/43
TCM 300 / 300C / 320 / 320C
A
APPENDIX
A.1 EnOcean serial protocol
When the receiver is in “Serial Interface” mode, it transfers out data blocks of information
from the received RF telegrams. As long as no transmitter has been learned, all received
from the received RF telegrams. As long as no transmitter has been learned, all received
EnOcean telegrams are transferred. As soon as at least one transmitter has been learned
only telegrams of transmitters learned by the receiver are transmitted via the serial inter-
only telegrams of transmitters learned by the receiver are transmitted via the serial inter-
face. The data block format is explained later in this document; it depends on the type of
sensor from which the telegram has been received.
sensor from which the telegram has been received.
A.1.1 Message format
The following figure shows the message format. A block is composed of 2 synchronization
The following figure shows the message format. A block is composed of 2 synchronization
bytes, 1 byte for the header and N bytes for the message data.
Message format for asynchronous serial communication
A.1.2 Byte signals and bit order
9600 bps; 8 data bits, no parity bit, one start bit, one stop bit
Line idle is binary 1 (standard)
Each character has one start bit (binary 0), 8 information bits (least significant bit first)
and one stop bit (binary 1)
Signals and bit order sending a byte
TxD
Sync
Header
Byte0
ByteN-1
...
Sync
D0
STA
D1 D2 D3 D4 D5 D6 D7 STOP
TxD
5V
0V
Bit
Time
Bit
Time
Bit
Time
Byte