Hello. I am interested in buying a GSM shield for the Arduino Uno so i can make calls directly from my computer. From what i saw on the sketches i found on the internet, it's actually easy to make or end a call. But what happens if you call a service with an answering machine which may say "Press 1 for the technical service, 2 for sales etc.". Is it possible to simulate the keyboard of a real phone in the arduino code?
Thank you in advace