No
. 96-1886-01E
Rev
.
1.1
GTECH Aircon Radio (Model GWT154)
PAGE
38
OF
72
Persistent Configuration Parameters
Command
Code
Description
Mode
Coordinator / End Device
PAN ID
Short and Extended PAN ID
Address
Short & Extended (EUI-64)
Set Channels - Default
Coordinator only
Set Channels - Mask
Channels End Device scans
Set RF - Tx Power
Default Transmit Power
Set RF - Antenna
Chip / External
Set RF - Failsafe
End Device only
Peripheral Address Firewall
Address filtering mask
Table 14 - Persistent Settings
7.2.1.2
Configuration Packet Structure Format
The radio configuration packet consists of a Command Code and Length, followed by variable number
of Parameter bytes. The packet is terminated with a Checksum that the sum of the Command Code,
Length and Parameter fields.
Bytes 1
1 0-255 1
Field Command Length Parameters Check
sum
Structure 7: Coordinator Command Packet
The Host CPU to Radio interface employs a query/response protocol where the Host CPU must always
poll for parameters from the Radio; the Radio never spontaneously transmits a packet over the Host
serial interface. The Radio should reply to all Host CPU data packets when it is the addressed
peripheral.
By definition, all Host CPU configuration packets requesting Parameters from the Radio are assigned
even Command Code values (the Least Significant Bit (LSB) is cleared). Host CPU configuration
packets writing Parameters to the Radio all have odd values (the LSB is set).
Host CPU write configuration packets should receive a reply packet from the Radio with the same
Command Code, zero Length and the Acknowledge bit set to one(1) if the Parameters were set as
instructed, or zero(0) if something failed.
Host CPU’s read configuration packets are sent to the Radio with zero Length. The Radio is to reply
with the same Command Code, the correct Parameter Length and the Acknowledge bit set to one(1) if
the requested parameters are in the Parameter field. If the requested parameters are not available, the
Radio should reply with the same Command Code with the Acknowledge bit set to zero(0) and zero
Length.
Command packets with failed checksums, unknown Command codes, or of incorrect Length, will be
ignored. The radio will not respond to failed command packets.
