R307 FINGER PRINT SENSOR
The R307 is a compact, self-contained optical fingerprint identification module that integrates an image sensor, on-board processing and flash storage so fingerprint capture, template generation and matching are handled inside the module. On power up the module initializes its sensor and firmware (≈200 ms) and then waits for commands over its serial or USB interface; when a finger is presented the unit acquires a greyscale image and stores it in the image buffer for processing.
Enrollment and verification workflows are implemented in the module: the host commands the R307 to capture images, convert them to character files, combine files into templates and store templates in the internal fingerprint library. The module supports both 1:1 verification and 1:N search modes and performs template matching internally, returning match results and scores to the host.
Despite its small physical footprint, the R307 exposes a rich instruction set (enroll, search, upload/download image/template, configure parameters, etc.), configurable system parameters (baud, security level, packet length) and a persistent flash library for templates — making it well suited for embedded access control, attendance and biometric projects where the host can be a microcontroller or a PC.
Features:
- Built-in optical sensor plus on-board image processing and template generation.
- Supports enrollment and matching: 1:1 (verify) and 1:N (search) modes.
- Internal fingerprint library with persistent flash storage (template storage by PageID).
- UART (TTL) and USB communication supported; semiduplex asynchronous serial protocol.
- Configurable system parameters (baud rate factor N, security level, data packet length).
- Image buffer and two character-file buffers for processing; supports upload/download of images and templates.
- Hardware RNG available (GetRandomCode instruction).
Specifications:
| Parameter | Value / Detail |
|---|---|
| Sensor type: | Optical |
| Power / Supply: | DC 4.2 V – 6.0 V |
| Typical working current: | 50 mA |
| Interface / Communication: | UART (TTL logical level) and USB 2.0 |
| Default baud / Baud control: | Default 57600 bps (PDF: baud = 9600 * N, N=1–12, default N=6) |
| Matching modes: | 1:1 (verify) and 1:N (search) |
| Image acquiring time: | < 0.5 s |
| Template size: | 512 bytes |
| Character file size: | 256 bytes |
| Storage capacity (finger library): | Up to 1000 templates (library size recognized from flash) |
| Average searching time (1:1000): | < 1 s. |
| Security level: | 5 levels (1..5); level affects FAR/FRR tradeoff |
| FAR / FRR: | FAR < 0.001% ; FRR < 0.1% |
| Image buffer format: | 256×288 pixels BMP (transferred as 16-grey over UART, 8-bit over USB) |
| Working environment: | Temp: −10 °C to +40 °C; RH 20%–85% (non-condensing) |
| Storage environment: | Temp: −40 °C to +85 °C; RH < 85% |
| Window dimension / Module outline: | Window ≈ 19 mm × 21 mm; Module outline (split type) 44.1 × 20 × 23.5 mm |
Dimensions:
Applications:
- Access control and secure entry systems.
- Attendance tracking systems.
- Biometric authentication for embedded / IoT devices.
- Smart locks and safe-locking mechanisms.
- Personalized device unlocking / user verification.
Package Contents:
- 1x R307 FINGER PRINT SENSOR
Datasheet