Block Diagram The security system comprises of an Arduino Uno microcontroller and a standard SIM900A ... (3,4); // RX and TX pins to communicate with GSM module #define msg_key 7 #define call_key 8 ...

The Spark Electron was released a few days ago, giving anyone with the Arduino IDE the ability to send data out over a GSM network. Of course, the Electron is just a GSM module tied to a ...

This will allow the development platform to connect to the internet via GSM mobile phone networks. The module, or shield ... through the BlueVia website where users can login with their Arduino ...