Quectel M35 Command Manual page 87

+CSCS in TS 07.07):ME/TA converts GSM alphabet into current TE character set
according to rules of Annex A
− if TE character set is "HEX": ME/TA converts each 7-bit character of GSM alphabet into
two IRA character long hexadecimal number (e.g. character P (GSM 23) is presented
as 17 (IRA 49 and 55))
− if <dcs> indicates that 8-bit or UCS2 data coding scheme is used, or <fo> indicates
that GSM 03.40 TP-User-Data-Header-Indication is set: ME/TA converts each 8-bit
octet into two IRA character long hexadecimal number (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 CBM Content of Message in text mode responses; format:
− if <dcs> indicates that GSM 03.38 default alphabet is used
− if TE character set other than "HEX" (refer to Command +CSCS in GSM 07.07): ME/TA
converts GSM alphabet into current TE character set according to rules of Annex A
− if TE character set is "HEX": ME/TA converts each 7-bit character of GSM alphabet
into two IRA character long hexadecimal number
− if <dcs> indicates that 8-bit or UCS2 data coding scheme is used: ME/TA converts
each 8-bit octet into two IRA character long hexadecimal number
<length> Integer type value indicating in the text mode (+CMGF=1) the length of the message body
<data> (or <cdata>) in characters; or in PDU mode (+CMGF=0), the length of the actual
TP data unit in octets (i.e. the RP layer SMSC address octets are not counted in the length)
<index> Integer type; value in the range of location numbers supported by the associated memory
<oa> GSM 03.40 TP-Originating-Address Address-Value field in string format; BCD numbers (or
GSM default alphabet characters) are converted to characters of the currently selected TE
character set (refer to command +CSCS in TS 07.07); type of address given by <tooa>
<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 two IRA character long hexadecimal
number (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 format
<scts> GSM 03.40 TP-Service-Center-Time-Stamp in time-string format (refer to <dt>)
<toda> GSM 04.11 TP-Destination-Address Type-of-Address octet in integer format (when first
character of <da> is + (IRA 43) default value is 145, otherwise default value is 129)
<tooa> GSM 04.11 TP-Originating-Address Type-of-Address octet in integer format (refer to
<toda>)
NOTE
If parameter is omitted the command returns the list of SMS with "REC UNREAD" status.
Example
AT+CMGF=1
OK
AT+CMGL="ALL"
M35_AT_Commands_Manual
// Set SMS message format as text mode
// List all messages from message storage
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M35 AT Commands Manual
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