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HUAWEI MG323 GSM M2M Module
AT Command Interface Specification Commands for Short Messages
Issue 02 (2010-11-23)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
164
11.5 AT+CMGS - Command for Sending Short Messages
The AT+CMGS command sends short messages in two steps:
In PDU mode (AT+CMGF=0):
First, send +CMGS=<length> that ends with (CR).
Then, upon receiving > that is returned by the MT, the TE sends a PDU data packet
that ends with <ctrl-Z>(IRA 26).
11.5.1 Testing Whether the Command for Sending Short
Messages Exists
Test
command
AT+CMGS=?
Function
Tests whether the command for sending short messages exists.
Response
z
In case of successful execution: <CR><LF>OK<CR><LF>
z
In case of an error during command execution:
<CR><LF>ERROR<CR><LF>
z
In case of an error related to the MS: <CR><LF>+CMS ERROR:
<err><CR><LF>
11.5.2 Sending Short Messages
This command sends short messages in PDU mode (+CMGF=0).
Write command
AT+CMGS=<length><CR>PDU is given <Ctrl-Z/Esc>
Function
Sends short messages.
Response
z
In case of successful execution:
<CR><LF>+CMGS: <mr>[,<ackpdu>] <CR><LF>
<CR><LF>OK<CR><LF>
z
In case of an error during command execution:
<CR><LF>ERROR<CR><LF>
z
In case of an error related to the MS: <CR><LF>+CMS
ERROR: <err><CR><LF>
Parameter description
<mr>: identifier of short messages, which is a decimal number consisting of digits 0–
9. Value range: 0–65535. For details, see 3GPP TS 23.040[3]
TP-Message-Reference integer format.
<length>: number of characters of the actually sent TPDU / 2; a decimal number
consisting of digits 0–9; GSM 7-bit coding; the maximum length is 160 characters; for
Chinese characters in UCS2 coding, the maximum length is 70 characters; otherwise,
ERROR is returned.