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if PDU mode (+CMGF=0) and sending successful:
+CMSS:<mr>[,<ackpdu>]
Send the SMS messages stored in memory
2.
No SMS message is stored in memory 2 or
the SMS message number in memory 2 is
incorrect.
AT+CMSS=6,"15889758495"
+CMSS: 6
OK
Forward stored SMS message to
15889758495. 6 is the ID of the message
stored successfully. Only message in text
mode support this function.
5.10 Delete SMS messages: +CMGD
To delete SMS messages from the current memory.
AT+CMGD=<index> [,<delflag>]<CR>
AT+CMGD=?<CR>
<index>:The recording number of the stored SMS messages
<delflag>: Integer
0: Delete the SMS messages with the specified recording numbers.
1: Delete all read SMS messages.
2: Delete all read and sent SMS messages.
3: Delete all read, sent, and unsent SMS messages.
4: Delete all messages.
Delete all read, sent, and unsent SMS messages.
Delete successfully
AT+CMGD=?
+CMGD: (1-50), (0-4)
OK
Query the value ranges of parameters.
No message number 5 is to be deleted in storage.