XE924M Просмотр технического описания (PDF) - Xecom
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XE924M Datasheet PDF : 20 Pages
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AT COMMANDS FOR 900 MHZ TRANSCEIVER
Interface
When a communications are initiated from the remote
modem, the XE924M switches to its wireless AT
commands after the modem connection is established.
These AT commands control the configuration of the
wireless link.
Command Line Format
Wireless Command lines issued to the XE924M follow
the same format as those of the modem AT commands
Each command begins with the prefix AT and ends with a
carriage return. All AT commands are issued to the
communications controller at the modem data rate; there
is no autobaud function. The modem uses the AT
command prefix to automatically determine the parity of
the incoming characters.
Command Prefix - Each command, except the A/
command, begins with the AT prefix. The "A" and "T"
may be either both upper case or both lower case but
cannot be of different cases. The prefix identifies parity of
the commands by comparing the parity bits of the "A"
and the "T" characters.
Command Line - Commands may be strung together in a
single command line of up to 36 characters. Commands in
the command string are executed in the sequence they
appear.
Omitted Parameters - Most commands include a
parameter which determines the function setting. When
the command parameter is omitted from the command
string, it is assumed to be a 0.
Result Codes - The modem normally issues a result code
after each action. Result codes may be provided as full
words, one or two digit numeric codes, or may be
disabled all together. Each result code ends with a
carriage return when numeric result codes are chosen.
When full word result codes are chosen, a Line Feed and
Carriage Return precede and follow each result code.
Disconnect Sequence - A three character sequence ini-
tiates a disconnect of the wireless link. The sequence
“~~~” is assigned to disconnect the link.
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XE924M
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