For that price, lots of people have had the opportunity to explore the module itself, and [marcrbarker] shows some of the extra, unadvertised, features it has. Acting as a GSM module that can send ...

The shield is based around the SIM900 GSM/GPRS radio module, and is compatible with the SIM908 GSM/GPRS module that adds a GPS receiver. Also on board this shield are a pair of 1/8″ audio ...

The IP/GSM Receiver receives TCP/IP events and alarms generated by the ACM or GSM/GPRS. When the encrypted data is transmitted to the IP/GSM Receiver, the encryption is opened and, in turn, forwarded ...

Professional installers around the globe choose LightSYS™ for their mass-market installations. LightSYS™ Hybrid Security System offers ultimate flexibility, with advanced IP and GSM/GPRS communication ...