The security system comprises of an Arduino Uno microcontroller and a standard SIM900A based GSM/GPRS modem. The whole system can be powered from any 12VDC/2A power supply unit/battery. Advertisement ...

Hardware Setup: Connect the DHT22 sensor to the Arduino's digital pin 2. Connect the gas sensor to the Arduino's analog pin A0. Connect the relays to digital pins 9 and 7. Connect the SIM900A GSM ...

This project enables remote control of a motor (such as a borewell pump motor) via GSM network using an Arduino Uno and SIM900A GSM module. The motor can be turned ON or OFF by sending SMS commands or ...

Abstract: This paper represents a design and implementation of a Wireless Heart rate monitor system using ARDUINO Lilypad which is enabled with the feature of sending SOS messages or calls through GSM ...

An I2C display has been selected due to its ease of use, requiring only two wires for connection (SDA and SCL). This simplifies both the circuit design and the code implementation. The system consists ...