AT Command Sets
INSYS GSM 4.2
INSYS GSM 4.2 compact
84
Sep-06
7
AT Command Sets
You can configure and control the INSYS GSM with two AT command sets:
¾
Standard AT commands
The standard AT commands control the GSM engine to establish data connections
using the GSM network.
¾
Extended INSYS AT** commands
The extended INSYS AT** commands control the extensions implemented by IN-
SYS for the digital inputs and outputs, alarm functions, security functions and
timer-controlled functions.
The following options are available to enter the standard commands:
¾
Locally via the serial interface in offline command mode (see Chap. 4.2)
¾
Locally via the serial interface in online command mode (see Chap. 0)
The following options are available to enter the extended INSYS AT** commands:
¾
Locally via the serial interface in offline command mode (see Chap. 4.2)
¾
Locally via the serial interface in online command mode (see Chap. 0)
¾
Remote in command mode - remote configuration (see Chap. 4.2.3)
¾
Via SMS (see Chapters 0 and 6.2.4)
In most cases, it is possible to enter the command as SMS. The configuration via
SMS is restricted to commands with responses of up to 140 characters.
The most important standard AT commands and all extended AT commands are listed in
the document "AT Command Set for INSYS GSM 4.2", which is available from IN-
SYS MICROELECTRONICS (e-mail to [email protected]) and at the website
http://www.insys-tec.de . The complete command reference for the standard AT com-
mands is also available on request.
Regarding the time sequence of the interface commands, please apply the modem
guideline V.25 ter.
The AT standard is a line-oriented command language. The input is not context-sensitive.
All commands are completed using the carriage return character which is set with the
registry ATS3 (Default = <CR> = 0x0Dh).
Note
Lining up several commands per input line is not possible for the
extended INSYS AT** commands. Further commands can be sent
only after the processing of the previous command is completed,
i.e. the response has been output.
For lining up standard AT commands, please refer to the detailed command set of the
GSM engine.
The IT commands implemented in INSYS GSM 2.x are replaced by the extended INSYS
AT** commands with the Format
AT**name
. Switching to configuration mode is no
longer required. Chap.
7.2
shows a comparison between IT commands and INSYS AT**
commands.
