One of the essential elements of building IoT project is the ability to connect devices. Wi-Fi and Bluetooth are good low cost choices, but they work only at close ranges, or in hotspot areas. When the device needs to be at a remote location GSM is a good and easy to setup option.
In this Tutorial, I will show you how easy it is to send and receive SMS messages over GSM with Arduino.
In the following Tutorials, I will also show you how you can connect over GSM to Internet and access servers, and how you can handle voice calls.