Description :
The GROW-R307S is an optical fingerprint sensor module commonly used in access control systems, biometric locks, attendance systems, and embedded electronics projects such as Arduino, ESP32, and Raspberry Pi.
It integrates fingerprint image capture, feature extraction, and fingerprint matching inside a single all-in-one module.
???? Technical Specifications
Sensor
Type: Optical
Resolution: 500 DPI
Capture window: approx. 14 × 18 mm
Power
Supply voltage: 4.2 V to 6 V DC (typically 5 V)
Typical operating current: ≤ 75 mA
Communication
UART (TTL level)
Default baud rate: 57,600 bps
Adjustable baud rate: 9,600 – 115,200 bps
USB version available on some models
Storage
Capacity: Up to 1000 fingerprints
Data sizes:
Feature file: 256 bytes
Template (model): 512 bytes
Performance
Image acquisition time: < 0.3 s
Matching time: < 0.2 s
Matching modes:
1:1 (verify against a known ID)
1:N (search entire database)
Error rates:
FRR (False Reject): ≤ 0.1 %
FAR (False Accept): ≤ 0.0001 %
Durability
Lifetime: Up to 100 million touches
Static protection: Up to 15 kV
Environment
Operating temperature: –20 °C to +50 °C
Dimensions: approx. 52 × 20 × 22 mm
???? Pinout (6-pin UART version)
Pin
Name
Description
1
VCC
Power supply 5V
2
GND
Ground
3
TXD
Data output (to microcontroller RX)
4
RXD
Data input (from microcontroller TX)
5
TCH
Touch detection signal
6
3.3V
Optional low-power output
????️ How It Works
1) Fingerprint Enrollment
User places finger twice.
The module:
Captures images
Extracts fingerprint features
Generates a template
Stores it in internal flash memory
2) Fingerprint Recognition
When a finger is placed:
The sensor captures and processes the image
Matches it against:
A specific ID (1:1), or
All stored fingerprints (1:N)
Returns:
Match success
Match failure
ID number (if matched)
???? Common Applications
Biometric door locks
Access control systems
Time attendance systems
Secure boxes and safes
Arduino / ESP32 / Raspberry Pi projects
Smart home and IoT systems
✔️ Tips for Use
Always use a stable 5V power supply.
Connect UART properly: TX → RX, RX → TX.
Keep the sensor surface clean.
If no response: check baud rate settings.
Protect the module from voltage spikes.
Description :
The GROW-R307S is an optical fingerprint sensor module commonly used in access control systems, biometric locks, attendance systems, and embedded electronics projects such as Arduino, ESP32, and Raspberry Pi.
It integrates fingerprint image capture, feature extraction, and fingerprint matching inside a single all-in-one module.
???? Technical Specifications
Sensor
Type: Optical
Resolution: 500 DPI
Capture window: approx. 14 × 18 mm
Power
Supply voltage: 4.2 V to 6 V DC (typically 5 V)
Typical operating current: ≤ 75 mA
Communication
UART (TTL level)
Default baud rate: 57,600 bps
Adjustable baud rate: 9,600 – 115,200 bps
USB version available on some models
Storage
Capacity: Up to 1000 fingerprints
Data sizes:
Feature file: 256 bytes
Template (model): 512 bytes
Performance
Image acquisition time: < 0.3 s
Matching time: < 0.2 s
Matching modes:
1:1 (verify against a known ID)
1:N (search entire database)
Error rates:
FRR (False Reject): ≤ 0.1 %
FAR (False Accept): ≤ 0.0001 %
Durability
Lifetime: Up to 100 million touches
Static protection: Up to 15 kV
Environment
Operating temperature: –20 °C to +50 °C
Dimensions: approx. 52 × 20 × 22 mm
???? Pinout (6-pin UART version)
Pin
Name
Description
1
VCC
Power supply 5V
2
GND
Ground
3
TXD
Data output (to microcontroller RX)
4
RXD
Data input (from microcontroller TX)
5
TCH
Touch detection signal
6
3.3V
Optional low-power output
????️ How It Works
1) Fingerprint Enrollment
User places finger twice.
The module:
Captures images
Extracts fingerprint features
Generates a template
Stores it in internal flash memory
2) Fingerprint Recognition
When a finger is placed:
The sensor captures and processes the image
Matches it against:
A specific ID (1:1), or
All stored fingerprints (1:N)
Returns:
Match success
Match failure
ID number (if matched)
???? Common Applications
Biometric door locks
Access control systems
Time attendance systems
Secure boxes and safes
Arduino / ESP32 / Raspberry Pi projects
Smart home and IoT systems
✔️ Tips for Use
Always use a stable 5V power supply.
Connect UART properly: TX → RX, RX → TX.
Keep the sensor surface clean.
If no response: check baud rate settings.
Protect the module from voltage spikes.
لماذا تتسوق معنا
تسوق بثقة
شحن سريع
إرجاع مجاني
دفع آمن
ضمان 30 يوماً
الدعم
الأسئلة الشائعة
المراجعات
مراجعات العملاء
كن أول من يشارك تجربته
ماذا يقول العملاء
لا توجد مراجعات بعد. اشتريت هذا المنتج؟ شارك رأيك أدناه.
