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TC63 AT Command Set

13.7 AT+CMGS

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13.7 AT+CMGS Send SMS message

Syntax

Command Description

The write command transmits a short message from TE to network (SMS-SUBMIT).

After invoking the write command wait for the prompt ">" and then start to write the message. To send the mes-

sage simply enter

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

To abort sending use

<ESC>. Abortion is acknowledged with "OK", though the message will not be sent.

The message reference <mr> is returned to the TE on successful message delivery. The value can be used to

identify the message in a delivery status report provided as an unsolicited result code.

Notes

• If sending 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> equals 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 sent to the subscriber.

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

• If sending 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).

• 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.

Test Command

AT+CMGS=?

Response(s)

Write Command

If text mode (see AT+CMGF=1)

AT+CMGS=<da>[, <toda>]

<CR> Text can be entered. <CTRL-Z>/<ESC>

Response(s)

+CMGS: <mr>[, <scts>]

If sending fails see notes below.

Write Command

If PDU mode (see AT+CMGF=0)

AT+CMGS=<length>

<CR> PDU can be entered. <CTRL-Z>/<ESC>

Response(s)

+CMGS: <mr>[, <ackpdu>]

If sending fails see notes below.

Reference(s) PIN ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge 4 Last

GSM 07.05 % % % % % % % ! ! !

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Siemens TC63 User Manual Page 331

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