Fingerprint Scanner Sensor – TTL (GT-511C3)

Wiring Connections

• TX (Transmit): Connect to the RX pin on the microcontroller.
• RX (Receive): Connect to the TX pin on the microcontroller.
• VCC (Power): Connect to a power source within 3.6V to 6V DC.
• GND (Ground): Connect to the ground of the power supply.
• RESET (Optional): Connect to a digital pin on the microcontroller if remote reset functionality is needed.

• • Step 1: Connect the VCC pin to your power source (3.6V to 6V DC).
  • Step 2: Connect the GND pin to the ground of the power supply.
  • Step 3: Connect the TX pin of the sensor to the RX pin of your microcontroller.
  • Step 4: Connect the RX pin of the sensor to the TX pin of your microcontroller.
  • Step 5: Optionally, connect the RESET pin to a digital output pin on your microcontroller for remote reset functionality.

Power

• Voltage Range: 3.6V to 6V DC
• Current Consumption:  80mA, with a peak of up to 150mA
• Power Source: Can be powered using regulated power supplies or batteries within the specified voltage range

Input and Output

• Input:
  • Power Supply: Requires a DC voltage between 3.6V and 6V.
  • Fingerprint Data: Receives fingerprint data from the user’s finger.
• Output:
  • Serial Data: Outputs processed fingerprint data and recognition results via TTL serial communication.
  • Status Signals: Provides feedback on the fingerprint processing and recognition status.

Physical Characteristics

• Dimensions: Approximately 70mm x 50mm x 20mm (size may vary slightly)
• Weight: Light, about 50 grams
• Construction: Plastic housing with built-in fingerprint sensor module

Technical Specifications

• Resolution: Usually around 256×256 pixels for fingerprint images
• Recognition Time:  1 to 2 seconds for fingerprint recognition
• Storage Capacity: Capable of storing multiple fingerprint templates
• Communication Protocol: TTL Serial (standard baud rate is 9600 bps)

Additional Features

• Template Storage: Can store multiple fingerprint templates for access control
• User-Friendly Software: Comes with software for managing fingerprint enrollment and processing
• Flexible Integration: Compatible with many microcontrollers and development boards

How to Use

• Setup:
  • Step 1: Connect the sensor to your microcontroller or serial interface according to the wiring connections.
  • Step 2: Power the sensor with a voltage between 3.6V and 6V DC.
• Configuration:
  • Step 3: Use the included software or firmware to enroll fingerprints into the sensor’s memory.
  • Step 4: Set up the serial communication settings to match the sensor’s specifications (e.g., 9600 bps baud rate).
• Operation:
  • Step 5: Place a finger on the sensor’s scanning area.
  • Step 6: The sensor will process the fingerprint and send data to the microcontroller.
  • Step 7: The microcontroller will compare the fingerprint data with stored templates to determine a match.
  • Step 8: Based on the result, the microcontroller will execute the appropriate action, such as granting or denying access.

The GT-511C3 fingerprint scanner sensor offers a reliable and simple solution for fingerprint recognition. Its TTL serial interface ensures easy integration with various microcontrollers, making it suitable for a wide range of security and access control applications.