While it is possible to hook up to older cell-phones via serial, the easiest way is probably using a service like Twilio.
You should be able to interact with their API using the built in HTTP functions or the client that is part of ofxHTTP.
While it is possible to hook up to older cell-phones via serial, the easiest way is probably using a service like Twilio.
You should be able to interact with their API using the built in HTTP functions or the client that is part of ofxHTTP.