The set command registers or unregisters an SMS client. Only one AT client can be
registered as an SMS client. An existing registration must be released before registering a new
client.
Syntax:
+CNMI=[<mode>[,<mt>[,<bm>[,<ds>]]]]
- +CMS ERROR code
- 301 – SMS service of ME reserved.
- 302 – Not allowed.
The set command parameters and their defined values are the following:
- <mode>
- 0 – Unsubscribe unsolicited result codes.
- 3 – Subscribe unsolicited result codes.
- <mt>
- 0 – No received message notifications, the modem acts as an SMS client. Forces also
<ds> to 0.
- 2 – SMS-DELIVERs (except class 2 and message waiting indication group) are routed
directly to the TE using unsolicited result code
+CMT:
[<alpha>],<length><CR><LF><pdu>. TE needs to ACK with +CNMA.
- <bm>
- Ignored
- <ds>
- 0 – No SMS-STATUS-REPORTs are routed to the TE. The only option if
<mt> is set to 0.
- 1 – SMS-STATUS-REPORTs are routed to the TE using unsolicited result code:
+CDS: <length><CR><LF><pdu>. TE needs to ACK with
+CNMA.
The TE needs to handle both SMS-DELIVER and SMS-STATUS-REPORT or neither of them,
<mt> and <ds> shall both be set to 0 at
the same time, equals to <mode> 0.
The following command example registers as a client for mobile-terminated SMS and status
reports:
AT+CNMI=3,2,0,1
OK