UMTS/HSPA  Module  Series 
  WCDMA  UGxx  AT  Commands  Manual 
 
WCDMA_UGxx_AT_Commands_Manual                   Confidential / Released             131 / 247 
 
 
 
 
Parameter 
<n>   Parameter required only for PDU mode           
            0          Command operates similarly as in text mode 
            1          Send positive (RP-ACK) acknowledgement to the network. Accepted only in PDU mode     
            2          Send  negative  (RP-ERROR)  acknowledgement  to  the  network.  Accepted  only  in  PDU 
mode                                                               
 
 
Execute and write command shall only be used when AT+CSMS parameter <service> equals to 1 (phase 
2+) and an appropriate URC has been issued by the module, i.e.: 
+CMT for <mt>=2 incoming message classes 0,1,3 and none  
+CMT for <mt>=3 incoming message classes 0 and 3  
+CDS for <ds>=1. 
Example 
AT+CSMS=1 
OK 
AT+CNMI=1,2,0,0,0 
OK 
 
+CMT: "+8615021012496",,"13/12/03,17:07:21+32",145,4,0,0,"+8613800551500",145,28 
This is a test from Quectel.                          //Short message is outputted directly when SMS is incoming 
Execution Command 
AT+CNMA 
Response 
OK   
ERROR   
 
If error is related to ME functionality: 
+CMS ERROR: <err> 
Write Command 
AT+CNMA=<n> 
Response 
OK   
ERROR   
 
If error is related to ME functionality: 
+CMS ERROR: <err>