Solenoid lock

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• Published Subscription Review Article 1 Jun 2026

  GSM Based OTP Security Locker Using Arduino

  By K Siva Ranjini, J. Keerthi, I. Anushka, B. Syam

  Abstract: This work presents a microcontroller-driven secure locker system that leverages GSM-based communication for dynamic user authentication. Unlike conventional locking mechanisms that depend on static credentials or physical keys, the proposed system utilizes a time-sensitive one-time password (OTP) transmitted to a pre- authorized mobile number. The authentication workflow is managed using an Arduino-based embedded platform integrated with a SIM A7670C GSM module. The system coordinates OTP generation, transmission, and validation in …

  Published in Journal of Microcontroller Engineering and Applications · Vol. 13, Issue 2, 2026 Read article →