Specifications

Chapter 13 – Short Message Service (SMS) Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 174
13.2 AT+CMGC Send an SMS Command
Test Command Syntax: AT+CMGC=?
Response: OK
Write Command Syntax: 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
Write Command Syntax: If PDU mode (see AT+CMGF=0)
AT+CMGC=<length><CR> PDU can be entered <CTRL-Z>/<ESC>
Response: +CMGC: <mr>[, <ackpdu>]
OK
If sending fails
ERROR
+CMS ERROR
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 baudrates 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.
13.3 AT+CMGD Delete SMS Message
Description: Write command deletes a short message from preferred message storage <mem1>
location <index>.
Test Command Syntax: AT+CMGD=?
Response: OK
Write Command Syntax: AT+CMGD=<index>
Response: OK
ERROR
+CMS ERROR
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 20.1 Restricted Access to SIM Data after SIM PIN Authentication.
13.4 AT+CMGF Select SMS Message Format
Description: The write command specifies the input and output format of the short messages.
Test Command Syntax: AT+CMGF=?
Response: +CMGF: (list of supported<mode>s)
OK
Read Command Syntax: AT+CMGF?
Response: +CMGF: <mode>
OK
Write Command Syntax: AT+CMGF=<mode>
Response: OK
Parameter Description:
<mode>
0 PDU mode. Default.
1 Text mode