I have been trying to interface with a GSM SIM card to pull data requested by a phone. I am basically going into the call setup process with a phone and I need to "activate" the SIM card "deeactivate" the SIM card. (This is not the same as calling Verizon/ATT for network access, this is device to SIM card level communication).
I also need to request other information from the SIM card. I
have interface spec documents for the sim card and reader, but I am having difficulties actually connecting to the SIM card reader and requesting the data.
I have searched for APDU interface information on the site and find a Very old post with very little information. I have some code from Mathan(http://forums.ni.com/t5/user/viewprofilepage/user-id/103044) but it is crashing LabVIEW. This is winscard.dll interface type activity which seems to partially apply.
Does anyone have any experience interfacing directly with a GSM SIM card to make calls? I am NOT trying to send SMS messages or connect with a serial port to pull out the CNUM.
APDU Ref: http://www.devshed.com/c/a/Practices/Smart-Cards-An-Introduction/
The APDU is an application level protocol as specified in the ISO 7816-4, which takes place between a smart card and a host application for the communication purpose.
APDU consist of two structures, as defined below:
Command APDU (C-APDU: this command is used by the host application to send command to the card. Header: it consist of 4 bytes:-
- Class of instruction (CLA)
- Instruction code (INS)
- Parameters: P1 and 2
I am new to the boards here and expect to be admonished for not provided enough information, so I am trying to give as much as possible.
Thanks in advance for ANY help or direction.
