SIM800L GSM Module Connections (Requires Level Shifting) The SIM800L module needs special attention because it operates at 3.3V logic levels while Arduino uses 5V. We need a voltage divider circuit to ...

The SIM800L Arduino Library is a simple and easy-to-use library for the SIM800L module, allowing for quick and efficient communication with the module using the Arduino platform. - vittorioexp/Sim8 ...

Sim800L module RX/TX are connected to 8/7 Arduino pins. Relays are negative - it means that they are swithching on by Arduino LOW digital signal. They are connected to 6/9 Arduino pins. First relay is ...

The SIM800L module ensures the encrypted transmission of data between the door lock system and users' mobile devices, providing secure and dependable communication. By integrating Arduino, fingerprint ...