Siemens Brodersen MC55 AT - Manual (Page 239)

MC55_ATC_V04.00 Page 239 of 475 3/17/06
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10.5 AT^SISO Internet Service Open
The
AT^SISO
write command starts the Internet session configured by the service profile. All further steps
needed to control the session depend on whether you are using URC mode or polling mode. The
AT^SISO
read
command returns the current status of all services.
URC mode:
If the service opens successfully, the URCs "
^SISW
" and "
^SISR
" will trigger the action to follow, either writing
data with
AT^SISW
or reading data with
AT^SISR
. To terminate an upload data stream set the
within the last
AT^SISW
command. If the URCs notify that a data transfer has been successful ("
^SISR
: x, 2" or
"
^SISW
: x, 2"), the service can be closed with
AT^SISC
. If a special event occurs, e.g. an error or a warning,
after opening or while using a service then the URC type "
^SIS
" will be delivered.
Polling mode:
After opening the service, all progress information needed to control the session shall be explicitly requested by
the host application. The particular sequence of AT commands varies depending on the service used. The fol-
lowing list summarizes, by way of an example, the steps normally involved in managing an upload or download
job.
• Upload (Socket, FTP, HTTP, SMTP):
- Enter the
AT^SISO
command, e.g. AT^SISO=9.
- Enter
AT^SISW
, specify , e.g. AT^SISW=9,20. Check resulting response for
WriteLength>
. Optionally, check error with
AT^SISE
, e.g. AT^SISE=9. If necessary, repeat the
sequence several times.
- Enter last
AT^SISW
command and enable , e.g. AT^SISW=9,0,1. 1)
If Socket service: Query available data with
AT^SISR
, e.g. AT^SISR=9,1430.
- Check service state with
AT^SISI
, e.g. AT^SISI=9, if necessary several times until =6
("Down").
- Check error with
AT^SISE
, e.g. AT^SISE=9.
- Close service with
AT^SISC
, e.g. AT^SISC=9.
• Download (Socket, FTP, HTTP, POP3):
- Enter the
AT^SISO
command, e.g. AT^SISO=9.
- Enter
AT^SISR
, specify , e.g. AT^SISR=9,1000. Check resulting response for
. If necessary, repeat the sequence several times until = -2 (end
of data) or ERROR.
- Check error with
AT^SISE
, e.g. AT^SISE=9.
- Close service with
AT^SISC
, e.g. AT^SISC=9.
• Socket service (upload and download possible in one session):
- Recommended: Set
AT+CMEE
=2 to enable extended error text.
- Enter the
AT^SISO
command, e.g. AT^SISO=9.
- Enter
AT^SISR
or
AT^SISW
, specifying or , e.g.
AT^SISR=9,20 or AT^SISW=9,20. Check resulting response for or
Length>
. If necessary, repeat the sequence several times.
- Check error with
AT^SISE
, e.g. AT^SISE=9.
- If write action: Enter last
AT^SISW
command and enable , e.g. AT^SISW=9,0,1. 1)
If Socket service: Query available data with
AT^SISR
, e.g. AT^SISR=9,1430.
- Close service with
AT^SISC
, e.g. AT^SISC=9.
1) Please note that in MC55 04.00 the does not work properly for the Socket service. Therefore, if
the Socket service is configured for TCP, check with that the transmission buffer is empty, before
activating the . See Release Notes related to MC55 04.00.