Siemens MC55 manual Command Description

MC55 AT Command Set

12.8 AT+CMGW

Command Description

s

mobile

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. Message 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 message will not be saved.

Notes

•If writing fails, for example, if a message is too long, the result 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 will 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 message. 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 termination 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 GSM 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 characters if the 7 bit GSM coding scheme is used, and 140 characters according to the 8 bit GSM coding scheme.

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

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