Communication: Humans Talk. Computers Talk - Smart Home Automation with Linux and Raspberry Pi - page 178

The receiving of messages is no more involved, depending on what you want to do. To simply retrieve all of your
messages, you can execute the following:
gnokii --getsms ME 1 end
This writes every SMS from your internal phone memory to the screen, where it could also be redirected into
a file or parsed. There is a built-in parser, which will format text messages into that of an e-mail and append it in
your inbox.
gnokii --getsms ME 1 end -a /var/mail/steev
Because this is an issued command, using received messages to control home devices takes a little work but
is feasible, as you need to poll the phone periodically. An implementation would first require you need to keep a
count of the messages you have in the inbox. This is not directly available, as the command reports all messages
from every inbox:
$ gnokii --showsmsfolderstatus
GNOKII Version 0.6.26
No. Name Id #Msg
============================================
0 Internal memory ME 92
1 SIM card SM 0
However, because we'd be parsing each message anyway, it isn't any more difficult and doesn't matter that you
might also download the same message you sent out previously. So, you get the number of total messages, like this:
#!/usr/bin/perl
my $status = `gnokii --showsmsfolderstatus 2>/dev/null`;
$status=~/ME\s+(\d+)/;
my $count=$1;
After retrieving the last total (held in whatever temporary or log file you decide to use), you can recall only the
new messages and then process them accordingly:
for(my $msg=$lastCount;$msg<=$count;++$msg) {
my $txt = `gnokii --getsms ME $msg $msg 2>/dev/null`;
if ($txt=~/Inbox Message/) {
$txt=~/Date\/time\:(.*?)\n.*?Sender\:(.*?)Msg.*?\n.*?Text\:\n(.*)/;
my $date = $1;
my $sender = $2;
my $message = $3;
# process here...
}
}