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.

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 ...

This is the second part of designing the world’s smallest phone - Indus Phone, where the UI is integrated with the basic ...

The PIMA GSM-100™ is a tri-band GSM module, which integrates fully with PIMA’s control panels - a full-data transmitter that supports most popular Central Monitoring Stations (CMS) protocols. The unit ...

This sewer drain shield system, combining ultrasonic sensors, GSM modules, nets, and PVC pipes, reduces debris entering ...

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 ...