GSM-Based-Voltage-Alert-System-using-Arduino-SIM800L This project monitors voltage using a potentiometer connected to an Arduino. When the voltage reaches 4.8V or higher, the system automatically ...

Simplifies the initialization and configuration of the SIM800L module Provides a set of easy-to-use functions for sending and receiving SMS messages Supports making and receiving phone calls Includes ...

The GSM Shield also includes a Telefonica SIM card that includes a worldwide data tariff which can be used anywhere there is a cellular signal. Features include the ability to have the Arduino ...