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10. GSM Library

This library contains some functions for GSM SIM cards.

10.1. Using the Library

The library already loads the Scam Library, so it suffices to say:

use GSM;

Be sure that you first initialize the SCAM program with Scam::init before calling any of the functions in this library.

10.2. Variables

This library has no variables.

10.3. Functions

select_file fileid

selects a file. fileid is an integer representation of the two byte file ID. Will return the response to the SELECT_FILE command that is sent to the card.

get_response length

gets length bytes of the response data of the last command. Returns the response.

read_binary offset_high, offset_low, length

reads length bytes of the currently selected file starting at the byte pointed to by offset_high offset_low. Returns the response.

status length

returns length bytes of information on the SIM status, using the STATUS command.

10.4. Example

#!/usr/bin/perl

use GSM;

Scam::init();
Scam::reader("dumbmouse(wait_etu=100,conv=inverse,parity=odd)");

# Flush the serial port & the named pipe
Scam::send("dump");
Scam::recv();

Scam::reset();
($out, $err) = Scam::recv();
chomp $out; chomp $err;
print "ATR = $out\n";

# MORE TO COME

10.5. Bugs

It's the wrong season for bugs now. They will come later.

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