I've been using this for years. My home router/firewall system sends an email to my email/SMS gateway when its public-facing IP address changes so I can always connect to my home network by IP.

This service is usually pretty cheap. Your plan includes this if you're a U.S. Cellular customer, for example. Take a look at a list of SMTP to SMS gateways for different carriers and try yours out. You might have to call your customer service office to activate the service with certain carriers, even if it's free.

There is a smscmd1 sample can be called by using PERL system system("./smscmd1", "$ARGV[0]","$ARGV1","$account","$pwd") Refer http://www.sms4mail.com/smsmail/smscmd.htm for detail

There are SMS modules if you search CPAN, but with so many SMS servers already on the web, I would probably find one that doesn't mind you using it as a gateway, and interface with it via WWW::Mechanize.

Unfortunately for most "programmers", they resort to relying on modules for everything: Here's what I did to get this working in the past... but I must warn you.. that if US Cellular changes their page... it could break the script.

If you view the HTML of US Cellular's SMS Gateway page (found on their website), you'll notice a random session number. You'll need this when you actually submit the request to broadcast the SMS.

Second, you'll simply perform 2 "GET" or "POST" requests, but do whatever the form on their site does.

Third, ensure you will pass the proper variables... such as the check box saying you have read the terms

Fourth, be sure to set a referrer and user agent string in your script for the request to match typical behavior of any normal web surfer... such as a Browser user agent string found for IE, Firefox, et cetra.

Fourth, don't ruin this for everyone. If they detect a tonne of traffic or abuse, they might decide to redesign their SMS interface to require a captcha... preventing you from developing a script and using it.

Fifth, if you do abuse the system, I WILL HUNT YOU DOWN AND REPROGRAM YOU AND YOUR COMPUTER.

If everyone is wondering why I didn't provide a script, it's because I see these things abused all the time... and if you are serious about using for personal use (instant notification of a successful telnet session... for example)... then you are definately smart enough to learn to use the LWP::Simple methods.. which are all you really need for this small task.

You asked for SMS, and I'll give you the SMS answer, and then explain why those that gave you non SMS answers have better solutions. If you were on say, TMobile you could use something like SMS::Send::US::TMobile and there are some other phone carriers under the Net::SMS branch.

Having said that, MOST carriers do not have public SMS gateways. They have private ones for pay. Why is that? Mostly we have the spammers to thank. When SMS gateways were public, phone customers started receiving 'stock tips' and what not. That's annoying enough, but getting charged for it was too much. Once the phone carriers started getting a deluge of phone calls they decided that public SMS gateways were the problem and just shut them down. SMS, by default, has less traceability than say email. This is why SMTP gateways are still public and that's why so many people use them to get to their phone. If your phone has email support, I'd recommend going that route.

Also some cell phone providers provide a gateway for email messages so that you can send to NPA-NXX-XXXX@yourprovider.net (or some variation thereof) and the email will be forwarded to your phone. Check with your provider's web site for details what the exact address format is, and then you could use any of the various email modules.

The short answer is that you NEED to know the carrier to send an SMS (or email) message from the computer.

Phone carriers exchange gateway and list information with each other, so sending a text message from one carrier to another is handled internally using dedicated gateways from one carrier to another. But if you were say, making a paging system and want to text cell phones when a job is complete. (or a file system fills up), then both the email and SMS gateways will require you to know the carrier. I know that where I work, they ask for the phone number and carrier and then that determines the message delivery. Sometimes it's SMS, sometimes email. It all depends on who has a public gateway and what it is.

--
I used to drive a Heisenbergmobile, but every time I looked at the speedometer, I got lost.

So, if I understand correctly, there is no gateway which will say, test all carriers for you or something. You'll need to know there carrier so it knows how to send it, etc. Ok, the of course my next question, are there any free gateway providers??

Ok, thanks for all the good feedback. I ended up just doing what KurtSchwind recommended. I was able to get my script to work using the MIME::Lite module. I have sprint so was able to send email to mynumber@sprintpaging.com. I had trouble sending to a cingular number. It seems like they keep changing their email addy to send it to though. Thanks again for the feedback from everyone

I personally believe -given that you ask here how to do that in Perl- that you're not the guy from a famous WTF, who insisted asking how to do the same thing in Java. Or else... are you that famous Java guy, who turned to Perl? ;)

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