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SIM800L & Arduino Uno . Advertisement. Hardware. To start, set up the hardware as shown below. Naturally, you’re going to need a valid SIM card to fully use the SIM800L module. For compactness, my ...

The code (Arduino sketch) is a basic one without any dedicated SIM800L libraries. In the code, the RX and TX pins are assigned as software serial pins. This is done deliberately so that the Arduino’s ...

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 ...