32 List of Figures
WAGO I/O System 750
750-940 EnOcean RS-485 Gateway; 868 MHz
Manual
Version 1.3.0, valid from FW/HW Version 01/01
Specific FEEEED mode parameters:
•
Activation telegram: [0xFE, 0xEE, 0xED]
•
Timeout for deactivation: 350 milliseconds
•
Buffer size for ESP3 telegrams: 6 ESP3 telegrams
4.1.2
ESP3 Protocol
ESP3 is a peer-to-peer protocol that uses a data packet structure, consisting of
three groups:
•
Header:
The header group contains all information needed to analyze the ESP3
packet, including the data length, optional length and packet type (e.g.,
command, event, radio or report).
•
Data:
The data group contains the data of an ESP3 packet. To ensure upward
compatibility, the format for this field is always the same for a specific ESP3
packet type (e.g., a specific ESP3 command).
•
Optional data:
An existing ESP3 packet can lengthened with the optional data group.
The sync byte indicates the start of an ESP3 packet. CRC8 checksums for the
header (CRC8H) and data (CRC8D) are used to determine the validity of the
telegrams.
Figure 13: EPS3 Packet Structure
