He decided to go with the low-cost SIM800L GSM modem, but as it only works on 2G networks, provisions have been made in the board design to swap it out for a more modern module should you desire.

Want to remotely monitor visitors at your door? Why by an off-the-shelf door monitoring solution when building your own is ...

The Open Electronics GSM/GPRS/GPS modem includes a header for an FTDI USB serial chip and a GSM module. Plug one into your computer and after a few short commands into a terminal, you’ve got a ...

The SPCN310.000 GSM module can be assigned to any mobile network by the insertion of a standard SIM card. The modem is compatible with the complete range of SPC panels and plugs directly on the main ...

In addition to the standard PSTN connection, the SD3 also has an integral, full-function GSM module enabling it to use any of the standard mobile phone networks. The SD3 accepts all standard SIM cards ...