User's Manual

Spread Spectrum Wireless Data Transceiver User Manual
LUM0002AF Rev D Version 6.3 21
SCRIPT FILE OR AT COMMANDS
The following list includes the commands available to use in Point-to-Point Slave/Master Switchable
operation mode and the functions the command controls.
Script File or AT Command Function Controlled
ATXF Frequency Key
ATXT Max Packet Size
ATXD Min Packet Size
ATXX Transmit Rate
ATXR RF Data Rate
ATXP RF Transmit Power
ATDT Position in Call Book to Call
ATD Allows a specific FreeWave Serial Number to be entered to call
ATXC
Used in conjunction with the ATD command, instructs
transceiver which Repeater path to follow
ATXS Instructs transceiver to go into Setup Mode
In general, the AT-commands supported by the transceiver can be divided into two types:
SETTING commands result in changes on the local transceiver.
ATXF_, ATXT_, ATXD_, ATXX_, ATXR_, ATXP_, or ATXS
C
OMMUNICATION – LINK commands result in the transceiver trying to establish the communication links
with other transceivers.
ATDT_, ATD_ or ATXC_ in conjunction with the ATD_
Transceivers react differently to the two types of the AT-commands. After receiving a Setting AT-
command, the transceiver will process the command and, when finished, it will remain in the Point-to-
Point Slave/Master Switchable mode.
Conversely, if the Communication - Link command is sent to a transceiver, it will process the command
and, when finished, will change its mode of operation, which in simple terms can be best described as a
Point-to-Point Master-like mode. In this mode the transceiver will not react to incoming AT-commands;
however, it will transmit them across the RF link as user’s data. The transceiver will stay in this mode until
its DTR line is de-asserted.
In order for a transceiver to accept any AT-commands, its DTR line must be asserted. However, the DTR
line has to be held asserted for different time durations depending on which type of command is given.
Follow the steps below to assure the proper functionality of a transceiver in Mode 6 operation.
For Setting AT-commands:
1. Ensure the Baud Rate in Radio matches Baud Rate of AT-commands. (Menu 1)
2. Assert the DTR line on transceiver’s data port.
3. Send the AT-command(s) to the transceiver on the Data Receive Line.
4. De-assert the DTR line after the transceiver responds to all of the AT-commands sent to it.
5. Repeat from Step 1, if needed.
For Communication - Link AT-commands: