Iridium 9601 Product Developer Manual page 41

Iridium Satellite LLC
9601 SBD Transceiver Preliminary Product Developers Guide Appendix A –AT Command Reference
V1.24 120505
2.29 +SBDWB –Short Burst Data: Write Binary Data to the Module
Exec Command:
+SBDWB=<SBD message length>
This command is used to transfer a binary SBD message from the DTE to the single
mobile originated buffer in the 9601. The mobile originated buffer can contain only one
message at any one time.
 Once the command is entered, and the message length is acceptable, the 9601 will
indicate to the DTE that it is prepared to receive the message by sending the ASCII
e n c o d e d s t r i n g "
 The
<SBD message length>
message not including the mandatory two-byte checksum.
 The maximum mobile originated SBD message length is specified at 205 bytes (and
may be increased following actual performance testing). The minimum mobile
originated SBD message length is 1 byte. If the
out of range, the 9601 issues response 3 (see below).
 Once the DTE receives the
be sent from the DTE formatted as follows:
{binary SBD message} + {2-byte checksum}
 The checksum is the least significant 2-bytes of the summation of the entire SBD
message. The high order byte must be sent first. For example if the DTE were to
s e n d t h e w o r d "
hex 68 65 6c 6c 6f 02 14.
 The mobile originated buffer will be empty upon power-up.
 If any data is currently in the mobile originated buffer, it will be overwritten.
Command Response:
SBD message successfully written to the 9601.
0
SBD message write timeout. An insufficient number of bytes were
1
transferred to 9601 during the transfer period of 60 seconds.
SBD message checksum sent from DTE does not match the checksum
2
calculated at the 9601.
SBD message size is not correct. The maximum mobile originated SBD
3
message length is 205 bytes. The minimum mobile originated SBD
message length is 1 byte.
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Information contained herein is subject to change without further notice
" ( h e x 5 2 4 5 4 1 4 4 5 9 0 D 0 A ) t o t h e D T E .
READY<CR><LF>
parameter represents the length, in bytes, of the SBD
indication from the 9601, the SBD message must
READY
" e n c o d e d i n A S C I I t o t h e 9601 the binary stream would be
hello
<SBD message length>
parameter is
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