Specifications
SIM900 AT Commands Set
SIM900_ATC_V1.01 105 23.06.2010
character long hexadecimal number
<dcs> depending on the Command or result code: GSM 03.38 SMS
Data Coding Scheme (default 0), or Cell Broadcast
Data Coding Scheme in integer format
<fo> depending on the Command or result code: first octet of GSM
03.40 SMS-DELIVER, SMS-SUBMIT (default 17),
SMS-STATUS-REPORT, or SMS-COMMAND
(default 2) in integer format
<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)
<mid> GSM 03.41 CBM Message Identifier in integer format
<oa> GSM 03.40 TP-Originating-Address Address-Value field in
string format; BCD numbers (or GSM default alphabet
characters) are converted characters of the currently
selected TE character set (specified by +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.
<pid> GSM 03.40 TP-Protocol-Identifier in integer format (default
0)
<sca> GSM 04.11 RP SC 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 (specified by +CSCS in TS
07.07); type of address given by <tosca>
<scts> GSM 03.40 TP-Service-Centre-Time-Stamp in time-string
format (refer <dt>)
<stat> 0 "REC UNREAD" Received unread messages
1 "REC READ" Received read messages
2 "STO UNSENT" Stored unsent messages
3 "STO SENT" Stored sent messages
<toda> GSM 04.11 TP-Destination-Address Type-of-Address octet
in integer format (when first character of <da> is +
(IRA 43) default is 145, otherwise default is 129)
<tooa> GSM 04.11 TP-Originating-Address Type-of-Address octet