but this is the first one we’ve seen that turns your Arduino into a proper cell phone. The shield is based around the SIM900 GSM/GPRS radio module, and is compatible with the SIM908 GSM/GPRS ...

The phone uses an app that talks to the Arduino via Bluetooth, which means the Arduino needs a Bluetooth module. The Arduino controls what amounts to an upside-down 3D printer. Instead of a hot ...