This project monitors voltage using a potentiometer connected to an Arduino. When the voltage reaches 4.8V or higher, the system automatically sends an SMS and makes a phone call using the SIM800L GSM ...

Arduino unveils GSM Shield that includes SIM card and global data tariff. New GSM Shield from Arduino includes global data tariff. Charles Gantt. TweakTown. Published Mar 11, 2013 11:30 AM CDT ...

It is built around an Arduino Uno board (MOD1), GSM module SIM800L (MOD2), an ultrasonic sensor module (S1), and a few other components. Fig. 1: Circuit Diagram for Arduino based Sewer Drain Shield.

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.

arduino gsm security alarm. ... // RX and TX pins to communicate with GSM module #define msg_key 7 #define call_key 8 #define end_key 9 String number ="0000000000"; // Add the 10-Digit Mobile Number ...

A Wearable Alert System for Underground Mining Workers based on Arduino with GSM ... The proposed system consists of temperature sensor, heartbeat sensor, gas sensor, display unit and GSM module. The ...

A GSM module or a GPRS module is a chip or circuit used to establish communication between a mobile device and a GSM/GPRS system ...