ME310G1/ME910G1/ML865G1 AT Commands Reference Guide
80617ST10991A Rev. 11 Page 430 of 1039 2021-09-23
If message is successfully sent to the network then the result is
sent in the format:
+CMSS: <mr>
where:
<mr> - message reference number.
If message sending fails for some reason, an error code is reported:
+CMS ERROR:<err>
To store a message in the <memw> storage see command +CMGW.
Care must be taken to ensure that during the command execution,
which may take several seconds, no other SIM interacting
commands are issued.
AT+CMSS=?
Test command returns the OK result code.
To avoid malfunctions is suggested to wait for the +CMSS: <mr> or
+CMS ERROR: <err> response before issuing further commands.