How does it work? Many GSM modems, WiFi and radio modules can be controlled by sending AT commands over Serial. TinyGSM knows which commands to send, and how to handle AT responses, and wraps that ...

SIM800L Module Pinout The SIM800L module is a GSM/GPRS module that offers a wide range of functionalities. It resembles a small chip with an antenna connector and various pins. The below image shows ...

Arduino will then use a GSM module to first send an SMS to the owner and then make a call on the specified number. How to Make A Security Alarm Using GSM Module? Enough security from burglars, smoke, ...

In this video, the author is building an Arduino project, where if the connected switch is turned on, it would be sending an SMS on the user's smartphone.

A GSM home security system that can dial up two phone numbers or send text message to one of the numbers to alert you when it detects movement of a burglar.

An Arduino is equipped with a piezo sensor to detect impact, and a GSM shield takes care of the texting. It’s an interesting concept, similar to requiring police officers to wear body cameras.

[Daniel] found other small Arduino boards like the Olimexino-85s and the Nanite are not as small as his design. The module has a QFN CPU and castellated holes around the perimeter for mounting.