No
. 96-1886-01E
Rev
.
1.1
GTECH Aircon Radio (Model GWT154)
PAGE
32
OF
72
6.0
WIRELESS INTER-COMMUNICATION
Configuration parameters for the End Device radios must be exchanged with the Coordinator radio, but
not conflict with the encapsulated GTECH485 protocol packets. A reserved protocol character in the
range between 0x0F and 0x1B could be used to indicate the start of a dedicated radio command packet.
This protocol character would need to be reserved for radio configuration packets in all future versions
of the GTECH485 protocol.
A more transparent method is to exploit the zero-length fragment shown in
Table 12 - Fragmentation
Codes
above. By definition, all radio configuration packets include a byte length as part of the header.
A radio configuration packet’s checksum may be calculated and verified without knowing the received
802.14.5 packet’s absolute payload length.
