Arduino Fingerprint Access Logger with RTC & OLED

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Create a secure biometric access logger that stores up to five fingerprints, identifies each user, and records entry timestamps. The R307 sensor scans a finger, the Arduino matches it against enrolled templates, and the OLED instantly shows the person’s name while the DS3231 RTC logs the exact time—ideal for an attendance register, lab entry system, or door access log that doesn’t need a PC.

What You'll Build

A compact module on a breadboard that enrolls fingerprints, stores up to five unique IDs, and when a stored print is scanned, displays the matched name on a 0.96‑inch OLED. Each successful scan triggers a buzzer beep, and the timestamped event remains visible on the screen. You’ll have a fully functional access logger that runs on a 9V battery, perfect for the school security project or college access control demonstration.

What You'll Learn

• How to interface the R307 optical fingerprint sensor with Arduino and store fingerprint templates in onboard memory
• Reading and setting real‑time clock data from the DS3231 module, including date and time formatting
• Displaying custom text, user names, and event logs on a 0.96‑inch OLED via I2C
• Integrating a buzzer for auditory feedback and managing power delivery on a breadboard with decoupling capacitors

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is aimed at CBSE Class 11–12 students building functional attendance or security projects for internal assessments, and first‑year B.Tech ECE/EEE learners tackling access control prototypes. It’s also a practical choice for Smart India Hackathon teams needing a reliable biometric logger, and for ATL Tinkering Labs introducing embedded authentication with real‑time logging. Even hobbyists from IIT/NIT/VIT/BITS maker clubs will find it a focused, ready‑to‑assemble biometric system.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.