Microsoft Word sim800c-ds application Note V


+CGREG: Always return GPRS registration status of SIM1



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SIM800C-DS Application Note V1.00

+CGREG: Always return GPRS registration status of SIM1. 

+CGREGDS: Always return GPRS registration status of SIM2. 

2.6.  AT+CGATTDS Query the GPRS attachment status of both SIM cards 

AT+CGATTDS    Query the GPRS attachment status of both SIM cards

 

Response 



+CGATT:  

+CGATTDS:  

 

OK 

 

Read Command 



AT+CGATTDS?

 

Parameter 



              Indicates the state of GPRS attachment 

                          0    Detached 

                          1    Attached 

Other values are reserved   

Reference 

 

Note 


This AT command is not controlled by AT+CDSDS. 

+CGATT: Always return the GPRS attachment status of SIM1. 

+CGATTDS: Always return the GPRS attachment status of SIM2. 

 



                                                                                                                Smart Machine Smart Decision                                       

SIM800-DS_Application Note_V1.00                                                                                             2015-07-30 

12

 



3.  URC Rule 

In SIM800C-DS, Some URCs related to the second SIM card (inserted to SIM slot 2) will be 

appended with “DS”. For example: 

Incoming call notification from SIM 1: RING 

Incoming call notification from SIM 2: RINGDS 

 

But there is no “DS” appended if the URC is reported by AT read command or AT test command. 



For example: 

AT+CDSDS=1 

OK 

AT+CDSDS? 



+CDSDS: SIM1,1,1 

 

OK 



AT+CPIN? 

+CPIN: READY 

 

OK 


AT+CDSDS=2 

OK 


AT+CDSDS? 

+CDSDS: SIM2,1,1 

 

OK 


AT+CPIN? 

+CPIN: READY 

 

OK 


 


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