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Chapter 12 – Short Message Service (SMS) Commands

Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 217

12.2 AT+CMGC Send an SMS Command

Syntax: Test Command: AT+CMGC=?

Response: OK

Write Command: If text mode (see AT+CMGF=1)

AT+CMGC=<fo>, <ct>[, <pid>[, <mn>[, <da>[, <toda>]]]]<CR> Text can be

entered <CTRL-Z>/<ESC>

Response: +CMGC: <mr>[, <scts>]

If sending fails

ERROR

+CMS ERROR: <err>

Write Command: If PDU mode (see AT+CMGF=0)

AT+CMGC=<length><CR> PDU can be entered <CTRL-Z>/<ESC>

Response: +CMGC: <mr>[, <ackpdu>]

If sending fails

ERROR

+CMS ERROR: <err>

Notes:

• After invoking the commands AT+CMGW, AT+CMGS or AT+CMGC it is necessary to wait for the prompt “>”

before entering text or PDU. After the prompt a timer will be started to observe the input.

• At baud rates below 19200 it is recommended to use the line termination character only (refer to ATS3,

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

response formatting character (refer to ATS4, default <LF> can cause problems.

• This command is PIN protected.

• This command is not supported in airplane mode.

12.3 AT+CMGD Delete Short Message

Description: Write command deletes a short message from preferred message storage <mem1> location

<index>.

Syntax: Test Command: AT+CMGD=?

Response: OK

Write Command: AT+CMGD=<index>

Response: OK

ERROR

+CMS ERROR: <err>

Notes:

• If there is no short message stored at the selected index, the response is OK too.

• Users should be aware that when using this AT command quickly after SIM PIN authentication, the SIM data

may not yet be accessible, resulting in a short delay before the requested AT command response is

returned. See Section 21.1 Restricted Access to SIM Data after SIM PIN Authentication.

• This command is PIN protected.

• This command is supported in airplane mode.

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