Siemens MC55 - page 326

MC55 AT Command Set

12.8 AT+CMGW s

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MC55_ATC_V01.05 Page 326 of 469 2/10/04

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Command Description

The execute and write commands transmit SMS (either SMS-DELIVER or SMS-SUBMIT) from TE to memory

storage <mem2>. Memory location <index> of the stored message is returned. Me ssage status will be set to

'stored unsent' unless otherwise given in parameter <stat>.

After invoking the execute or write command wait for the prompt ">" and then start to write the message. To save

the message simply enter <CTRL-Z>. After the prompt a timer will be started to observe the input .

To abort writing use <ESC>. Abortion is acknowledged with "OK", though the messa ge will not be saved.

Notes

• If writing fails, for example, if a message is too long, the resul t code depends on the current setting of the

AT^SM20 command:

If the AT^SM20 <CmgwMode>=1 (factory default) any failure to send a message is responded with "OK" . Users

should be aware, that despite the "OK" response, the message wi ll not be written to the selected SMS stor-

age.

If the AT^SM20 <CmgwMode> equals 0 any failure to write a message is responded with "ERROR".

• If writing fails due to timeout, then

AT^SM20 <CmgwMode>=1 causes "+CMS ERROR: Unknown error" to be returned;

AT^SM20 <CmgwMode>=0 causes "+CMS ERROR: timer expired" to be returned.

• Note that some providers do not recognize an @ symbol used in a short m essage. A widely used alternative

is typing "*" as defined in GSM 03.40 (GPP TS 23.40).

• For baudrates lower than 19200 it is recommended to use the line terminatio n character only (refer to ATS3=

<n>, default <CR>) before entering the text or PDU. Use of the line termination character followed by the

response formating character (see ATS4= <n>, default <LF>) may cause problems.

• SMS-COMMANDs and SMS-STATUS-REPORTs cannot be stored in text mode.

• All characters entered behind the ">" prompt will be recognized as G SM characters. For example, "Back-

space" (ASCII character 8) does not delete a character, but will be inserted into the short message as an addi-

tional physical character. As a result, the character you wanted to delete still appears in the text, plus the GSM

code equivalent of the Backspace key.

• In text mode, the maximum length of an SMS depends on the used coding scheme: It is 160 ch aracters if the

7 bit GSM coding scheme is used, and 140 characters according to the 8 bi t GSM coding scheme.

• The length of 8-bit data coded short messages has to be greater than 0.