User Guide

AT Command Set
MC35_ATC_01_V05.00 Page 146 of 256 15.07.2002
0 “REC UNREAD” Received unread messages (default)
1 “REC READ” Received read messages
2 “STO UNSENT” Stored unsent messages
3 “STO SENT” Stored sent messages
<pdu> In the case of SMS: GSM 04.11 SC address followed by
GSM 03.40 TPDU in hexadecimal format: ME/TA converts
each octet of TP data unit into hexadecimal numbers con-
taining two IRA characters (e.g. octet with integer value 42
is presented to TE as two characters 2A (IRA 50 and 65)).
In the case of CBS: GSM 03.41 TPDU in hexadecimal for-
mat.
<index> Index of message in selected storage <mem2>
Reference
GSM 07.05
Note
· After invoking the commands CMGW, CMGS, CMGC wait for the
prompt ">" and then start to send text to the module.
· To store the message simply enter <CTRL-Z>. See Execute com-
mand for possible responses.
· Writing can be aborted by entering <ESC>. Of course, the mes-
sage will not be stored, though the operation is acknowledged with
OK.
· When sending e-mails via SMS the @ character may be replaced
with “*” as defined in GSM 03.40 (3GPP TS 23.040).
· At baudrates lower than 19200 it is recommended to use the line
termination character only (refer to +ATS3, default <CR>, pg. 32)
before entering the text/pdu. Use of the line termination character
followed by the response formating character (refer to +ATS4, de-
fault <LF>, pg. 32) can cause problems.
· All characters entered behind the “>” prompt will be recognized as
GSM characters. For example, “Backspace” (ASCII character 8)
does not delete a character, but will be inserted into the SMS as
an additional 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. See Chapter 9.5 which provides
the supported alphabet tables. Also refer to Chapter 1.5 for gen-
eral remarks on character sets.
· 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.