Abstract: The rapid rise of e-commerce has increased doorstep deliveries, but challenges such as missed deliveries, parcel theft, and dependency on customer availability still persist. This paper presents a Dual Door Smart Locker System that enables secure parcel drop-offs without requiring the owner’s physical presence. The system features independent access points for delivery personnel and the owner, where the delivery door is remotely unlocked by the user, and the retrieval door requires secure authentication using a PIN or facial recognition. Additionally, the system includes an integrated smart letter box, where an IR sensor detects newly dropped mail and updates the cloud dashboard with real-time notifications. The architecture uses ESP32 microcontrollers, Firebase cloud services, a Python-based recognition engine, and a web dashboard to enable remote monitoring, access logging, and seamless communication between modules. Experimental results demonstrate reliable authentication, accurate mail detection, and efficient dual-door operation, making the proposed solution a practical and scalable approach for modern home-delivery ecosystems.

Keywords: Smart Locker, IoT, Dual Door Access, Facial Recognition, ESP32, Secure Parcel Delivery, Cloud Integration.

Downloads: | DOI: 10.17148/IARJSET.2025.1211045