This tasty proof-of-concept cellular sandwich is made by adding a Sim900 GSM/GPRS module, which communicates via UART, to the Pi/TFT hardware while using a piece of foam core board in the middle ...

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 ...

The system is modular and expandable, making it possible to install a basic intruder system and add modules and functionality - be it dual-path IP and GSM/GPRS communication, Access Control, Voice ...