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 protect the SIM800L from damage. If you are new to the ...

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 ...

Hi. I tried to make a simple gadget for watering my remote garden on SMS. I have bought Arduino Uno Rev.3, Sim800L module and couple of relays. Sim800L module RX/TX are connected to 8/7 Arduino pins.

The Fingerprint Door Lock (FPDL) using Arduino with SIM800L research is designed to improve the security and convenience of door access control by integrating fingerprint recognition with Arduino and ...