Write a Text Message to the ISU
+SBDWT=[<text message>]
This command is used to transfer a text SBD message from the FA to the single mobile originated buffer in the ISU.
The text message may be entered on the command line:
- For example,
AT+SBDWT=hello
- The length of
<text message>
is limited to 120 bytes. This is due to the length limit on the AT command line interface. - The message is terminated when a carriage return is entered.
Alternatively, the text message may be entered separately:
- Upon entering the command
AT+SBDWT
, the ISU will indicate to the FA that it is prepared to receive the message by sending the stringREADY<CR><LF>
to the FA. - Once the FA receives the READY indication, the text message must be sent, terminated by a carriage return,
- The length of the text message entered in this way is limited only by the maximum mobile- originated message length of 340 bytes.
- 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
For the AT+SBDWT
form:
Value | Result |
---|---|
0 | SBD message successfully stored in mobile originated buffer. |
1 | SBD message write timeout. No terminating carriage return was sent within the transfer period of 60 seconds. |
For the AT+SBDWT=<text message>
form:
Value | Result |
---|---|
OK | SBD message successfully stored in mobile originated buffer. |
ERROR | An error occurred storing SBD message in mobile originated buffer. |