Fingerprint Sensor RAKwireless RAK12001 (GROW R307, UART)

RAKwireless RAK12001 adds local fingerprint identification to WisBlock systems—useful when you want on-device authentication without relying on cloud services. The integrated GROW R307 optical fingerprint module supports both fingerprint enrollment and fingerprint matching. During enrollment, the user places the same finger twice; the module processes the captured images, generates a template, and stores it in its internal memory. During matching, it checks whether the finger on the sensor matches a stored template.

For developers, this is convenient because you don’t need to implement image processing from scratch. You interact with the module over UART using clear enroll/verify workflows, making it straightforward to integrate into firmware and build functional prototypes quickly.

Typical real-world applications include:

Access control for cabinets, enclosures, rooms, and equipment.

Operator authorization in industrial environments (only approved users can enable a function).

Smart lock and IoT access prototypes (doors, hatches, lockers, secure boxes).

Asset and inventory systems with local user identification at the device.

Performance specs list scan speed < 0.3 s and verification speed < 0.2 s, supporting fast user interaction. The sensor window is 19 × 21 mm. Power is 3.3 V with an onboard 5 V boost converter, and typical current consumption is 50 mA.

Security note: overall system security depends on implementation details (protecting the UART path, handling templates, lockout rules, and enclosure design).