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Robu.in | Indian Online Store | RC Hobby | Robotics
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      • Component Kit
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      • Microcontroller ICs
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      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Accessories
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    • Creality 3D Printers
    • Electronics Parts
      • 3D Printer Display and Controllers
      • 3D Printer Extruder Kit
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      • Limit Switch
    • Mechnical Parts
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      • Lead Screw and Nut
      • Linear Guide Rail
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      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Micro LiPo Batteries
    • Lithium-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & Above
    • Orange Premium BMS
    • Other Batteries
      • TX/RX Li-PO Batteries
      • LifePO4 Battery
      • Coin Cell Battery
      • CNC and PLC Machine Battery
    • Battery Accessories
      • Battery Protection Board
      • Battery Pack Accessories & Holders
      • Battery Chargers
      • Battery Connector
      • Battery Harness
      • Power Adapter and Cable
      • Lipo Voltage Checker
      • Parallel Charging Board
      • LiPO Battery Sack, Covers & Mats
  • Motors, Drivers, Actuators
    • Planetary Gear Motor
      • Orange Planetary Gears Motor
      • Orange Planetary BLDC Motors
      • Planetary Gear DC Motors
    • Brushed DC Motor
      • Orange Johnson Geared Motor
      • Johnson Geared Motor (Grade B)
      • DC Geared Motor with Encoder
      • 25 GA Motors
      • Orange OG 555 DC Motor
      • RS 50 Geared Motor
      • Orange RS 775 DC Motor
      • Orange PM33 Motor
      • Orange Square Gear Box Motor
      • Orange Rectangular Gearbox Motor
    • N20 Micro Gear Motor
      • Micro Gear Motor with Encoder
      • Micro Gear Motor without Encoder
    • Stepper Motor
    • Servo Motors
      • Orange RC Servo Motors
      • Emax Servo Motor
      • Other Servo motor
    • Pumps
      • Kamoer High Quality Pumps and Accessories
      • Generic Pumps
      • Pneumatic Connectors and Valves
    • Cooling Fans
    • Linear Motor/Actuator
    • Solenoids & Electromagnets
    • Other DC Motors
      • BO Motors
      • Metal Gear Box Motor
      • Plastic Gear Box Motors
      • Vibration Motor
      • Drone Motor
    • Motor Drivers
      • Brushed DC Motor Driver
      • Servo Motor Driver
      • Stepper Motor Drivers
      • Brushless DC Motor Driver (ESC)
    • Motor Accessories
      • Motor Mounting Brackets
      • Bearings
      • Couplings
      • JR Servo Cable
      • Futaba Servo Cable
      • Push Rod
      • Other Accessories
  • Development Board
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      • Original Arduino Boards
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  • Official Arduino Boards
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    • Seven Segment LED Display
    • LED Dot Matrix Display
  • Sensors
    • Sensor Kits
    • Ultrasonic and Proximity
      • MAXBOTIX Ultrasonic Sonar
      • Ultrasonic Sensor
      • Orange Proximity Sensor
      • Autonics Proximity Sensor
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      • LiDAR Sensor
      • Other Ultrasonic Sensors
    • Temp., Humidity, Gas & Environmental
      • Temperature & Humidity Sensor
      • Environmental Sensors
      • Gas and Dust Sensor
      • Thermoelectric Cooler
    • Motion, Light and Sound
      • PIR / IR and Optical Sensor
      • RFID Card, Tags & Reader
      • Light/Color Sensor
      • Line Sensor
      • Sound Sensor
    • Biometric, Rotation, and Current
      • Biometric/ECG/EMG Sensor
      • Rotary Encoder
      • Current and Voltage
    • Load, Pressure, Flow & Vibration
      • Water TDS, pH, Flow, Level and Pressure Sensor
      • Vibration/Tilt Sensor and Modules
      • Load / Pressure / Force / Flex Sensor
  • Cameras
    • IoT Cameras
    • FPV Cameras
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    • Raspberry Pi Camera
  • IoT and Wireless
    • Ai Thinker ESP Modules and Development Boards
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    • Development Board/Kit
    • xBee Zigbee Module
    • LORA WiFi
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    • Wireless Smart Switches
  • Electronic Modules
    • Programming Module
    • Memory Interfacing
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    • Bluetooth Interfacing
    • Ethernet Module
    • Interface Module
    • LED Module
    • LASER Module
    • Addressable LED and Drivers
    • Breakout Board
    • Relay Switch Modules
    • Electronic Switches/Keypads
    • Solar Panels and Controllers
    • Wearable Electronic
    • Real Time Module (RTC)
    • Audio Module/ Amplifier
    • Mux-DeMux & Logic Converter
    • Voltage Regulator
      • Boost Converter (Step-Up )
      • Buck Converter (Step-Down)
    • Measuring Instruments
      • Digital Multimeter
      • Temperature Meter
      • Digital Voltage, Current and Frequency Meter
      • Oscilloscope & Signal Generator
      • Other Measuring Instrument
    • Power Supply
      • Transformers
      • SMPS
      • Hi-Link Power Supply Module
    • Displays
  • Wires and Cables
    • PVC and Silicone Wires
      • PVC Wire
      • 6 to 10 AWG
      • 12 to 16 AWG
      • 18 to 22 AWG
      • 24 to 30 AWG
    • Cables
      • DuPont / Jumper Cable
      • Interfacing Cables
      • JR Servo cable
      • Futaba servo cable
      • FFC Cable
    • Heat Shrink Tubing / Sleeve
      • Heat Shrink Combos
      • 1 mm to 4 mm
      • 5 mm to 10 mm
      • 11 mm and Above
      • PVC Heat Shrink
    • Tools and Accessories
      • Wire Cutter / Stripper
      • Cable Ties
      • Sleeves and Drag Chain
  • Mechanical Components and Workbench Tools
    • Mechanical Robotic Parts
      • Chassis
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • Lead Screw
      • Linear Guide Rail
      • Couplings
      • Bearings
      • Motor Mounting Brackets
      • Gears
    • Wheels
      • Mecanum Wheels
      • Omni Wheels
      • Heavy Duty Wheel
      • RC Car Wheel
      • Pulley Wheel & Track Belt
      • Caster Wheels
    • Carbon Fiber
      • Carbon Fiber Sheets and Strips
      • Carbon Fiber Tubes and Rods
    • Nuts-Bolts and Spacers
      • Countersunk(CSK) Screws
      • Socket Set Screws (Allen Grub)
      • Socket Head Cap Screw (Allen Bolt)
      • CHHD Screws
      • Nut and Washers
      • Nylon Nuts and Bolts
      • Spacer and Standoff
    • Soldering Tools
    • Workbench Tools
  • Services
    • PCB Manufacturing Service
    • Custom Battery Pack
    • Online SLA 3D Printing Service
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All Categories
  • Shop by Brands
  • New Arrivals
  • Refurbished
  • Partial Working
  • Electronic Components
    • Basic Electronic Components
      • Component Kit
      • Resistor
      • Inductor
      • Capacitor
      • Diode
      • Transistor
      • Crystal Oscillators
    • Semiconductor ICs
      • Microcontroller ICs
      • Interface ICs
      • Clock, Timer and Counter ICs
      • Sensor ICs
      • Optocoupler ICs
      • Converter ICs
      • Comparator ICs
      • Driver ICs
      • Encoder ICs
      • Audio ICs
      • IC Base
    • LEDs and Indicators
      • LEDs Kit
      • Pilot Lamp Indicator
      • LEDs with Holders
      • Through Hole LED
      • SMD LED
    • Miscellaneous Component
      • Potentiometer
      • Fuse
      • Buzzer/Speaker
      • Aluminium Heat Sink
      • Bread Board and Zero PCB
    • Mechanical Switches
    • Power Connectors
    • RF Connectors
    • Interface Connector
    • Berg / FPC / IDC Connector
  • DIY Learning and Robot Kits
    • Orange Premium Learning Kits
      • Orange Kits for Arduinos
      • Orange Kits for Raspberry Pi
      • Orange Electronic Component Kits
      • Orange DIY Mini Project Kits
    • DIY Hobby Project Parts
    • Robot Kits and Parts
    • Drone Kit
    • DIY 3D Printer Kits
    • Ebike Kit
    • Official Raspberry Pi Kits
    • Kits compatible with Arduino
    • Sensor Kits
    • Component Kit
  • Drone Parts
    • Kits
    • Frames and Accessories
    • Flight Controller & Accessories
    • Motors
    • Speed Controllers (ESC)
    • Propellers
      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Accessories
    • Drone Transmitter & Receiver
    • Antennas
    • FPV Cameras
    • FPV Antennas and Trans-Receivers
    • Accessories
    • Camera Gimbal
  • E-Bike Parts
    • Ebike Kit
    • Ebike Motor and Controller
    • Ebike Battery
    • Mechanical Accessories
    • Electronics Accessories
  • 3D Printers and Parts
    • Creality 3D Printers
    • Electronics Parts
      • 3D Printer Display and Controllers
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • Stepper Motors and Accessories
      • 3D Printer Display and Controller
      • Limit Switch
    • Mechnical Parts
      • 3D Printer Heatbed and Accessories
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Linear Guide Rail
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • 3D Printer Couplings
      • Timing Belt and Pulley
      • Sleeves and Drag Chain
    • 3D Printer Filaments
      • ORANGE Premium Filaments
      • ESUN Filaments
      • Resins
  • Batteries, Chargers and Accessories
    • Custom Battery Pack
    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Micro LiPo Batteries
    • Lithium-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & Above
    • Orange Premium BMS
    • Other Batteries
      • TX/RX Li-PO Batteries
      • LifePO4 Battery
      • Coin Cell Battery
      • CNC and PLC Machine Battery
    • Battery Accessories
      • Battery Protection Board
      • Battery Pack Accessories & Holders
      • Battery Chargers
      • Battery Connector
      • Battery Harness
      • Power Adapter and Cable
      • Lipo Voltage Checker
      • Parallel Charging Board
      • LiPO Battery Sack, Covers & Mats
  • Motors, Drivers, Actuators
    • Planetary Gear Motor
      • Orange Planetary Gears Motor
      • Orange Planetary BLDC Motors
      • Planetary Gear DC Motors
    • Brushed DC Motor
      • Orange Johnson Geared Motor
      • Johnson Geared Motor (Grade B)
      • DC Geared Motor with Encoder
      • 25 GA Motors
      • Orange OG 555 DC Motor
      • RS 50 Geared Motor
      • Orange RS 775 DC Motor
      • Orange PM33 Motor
      • Orange Square Gear Box Motor
      • Orange Rectangular Gearbox Motor
    • N20 Micro Gear Motor
      • Micro Gear Motor with Encoder
      • Micro Gear Motor without Encoder
    • Stepper Motor
    • Servo Motors
      • Orange RC Servo Motors
      • Emax Servo Motor
      • Other Servo motor
    • Pumps
      • Kamoer High Quality Pumps and Accessories
      • Generic Pumps
      • Pneumatic Connectors and Valves
    • Cooling Fans
    • Linear Motor/Actuator
    • Solenoids & Electromagnets
    • Other DC Motors
      • BO Motors
      • Metal Gear Box Motor
      • Plastic Gear Box Motors
      • Vibration Motor
      • Drone Motor
    • Motor Drivers
      • Brushed DC Motor Driver
      • Servo Motor Driver
      • Stepper Motor Drivers
      • Brushless DC Motor Driver (ESC)
    • Motor Accessories
      • Motor Mounting Brackets
      • Bearings
      • Couplings
      • JR Servo Cable
      • Futaba Servo Cable
      • Push Rod
      • Other Accessories
  • Development Board
    • Official Arduino Boards
      • Original Arduino Boards
      • Official Arduino Shields
      • Official Arduino Kits
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    • 8051 Board
    • Single Board Computer
    • Teensy Board
    • Udoo Board
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    • PIC Development board
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    • Advance Development Boards
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      • Boards
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    • e-Ink Display
    • Seven Segment LED Display
    • LED Dot Matrix Display
  • Sensors
    • Sensor Kits
    • Ultrasonic and Proximity
      • MAXBOTIX Ultrasonic Sonar
      • Ultrasonic Sensor
      • Orange Proximity Sensor
      • Autonics Proximity Sensor
      • Other Proximity Sensor & Modules
      • LiDAR Sensor
      • Other Ultrasonic Sensors
    • Temp., Humidity, Gas & Environmental
      • Temperature & Humidity Sensor
      • Environmental Sensors
      • Gas and Dust Sensor
      • Thermoelectric Cooler
    • Motion, Light and Sound
      • PIR / IR and Optical Sensor
      • RFID Card, Tags & Reader
      • Light/Color Sensor
      • Line Sensor
      • Sound Sensor
    • Biometric, Rotation, and Current
      • Biometric/ECG/EMG Sensor
      • Rotary Encoder
      • Current and Voltage
    • Load, Pressure, Flow & Vibration
      • Water TDS, pH, Flow, Level and Pressure Sensor
      • Vibration/Tilt Sensor and Modules
      • Load / Pressure / Force / Flex Sensor
  • Cameras
    • IoT Cameras
    • FPV Cameras
    • Smart Vision Camera
    • Thermal Cameras
    • Raspberry Pi Camera
  • IoT and Wireless
    • Ai Thinker ESP Modules and Development Boards
    • ESP WiFi Module
    • Development Board/Kit
    • xBee Zigbee Module
    • LORA WiFi
    • Bluetooth and NRF Modules
    • GSM / GPRS Modules
    • Transmitter and Receivers
    • Advance Controller Board
    • Wireless Smart Switches
  • Electronic Modules
    • Programming Module
    • Memory Interfacing
    • Communication Module
    • Bluetooth Interfacing
    • Ethernet Module
    • Interface Module
    • LED Module
    • LASER Module
    • Addressable LED and Drivers
    • Breakout Board
    • Relay Switch Modules
    • Electronic Switches/Keypads
    • Solar Panels and Controllers
    • Wearable Electronic
    • Real Time Module (RTC)
    • Audio Module/ Amplifier
    • Mux-DeMux & Logic Converter
    • Voltage Regulator
      • Boost Converter (Step-Up )
      • Buck Converter (Step-Down)
    • Measuring Instruments
      • Digital Multimeter
      • Temperature Meter
      • Digital Voltage, Current and Frequency Meter
      • Oscilloscope & Signal Generator
      • Other Measuring Instrument
    • Power Supply
      • Transformers
      • SMPS
      • Hi-Link Power Supply Module
    • Displays
  • Wires and Cables
    • PVC and Silicone Wires
      • PVC Wire
      • 6 to 10 AWG
      • 12 to 16 AWG
      • 18 to 22 AWG
      • 24 to 30 AWG
    • Cables
      • DuPont / Jumper Cable
      • Interfacing Cables
      • JR Servo cable
      • Futaba servo cable
      • FFC Cable
    • Heat Shrink Tubing / Sleeve
      • Heat Shrink Combos
      • 1 mm to 4 mm
      • 5 mm to 10 mm
      • 11 mm and Above
      • PVC Heat Shrink
    • Tools and Accessories
      • Wire Cutter / Stripper
      • Cable Ties
      • Sleeves and Drag Chain
  • Mechanical Components and Workbench Tools
    • Mechanical Robotic Parts
      • Chassis
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • Lead Screw
      • Linear Guide Rail
      • Couplings
      • Bearings
      • Motor Mounting Brackets
      • Gears
    • Wheels
      • Mecanum Wheels
      • Omni Wheels
      • Heavy Duty Wheel
      • RC Car Wheel
      • Pulley Wheel & Track Belt
      • Caster Wheels
    • Carbon Fiber
      • Carbon Fiber Sheets and Strips
      • Carbon Fiber Tubes and Rods
    • Nuts-Bolts and Spacers
      • Countersunk(CSK) Screws
      • Socket Set Screws (Allen Grub)
      • Socket Head Cap Screw (Allen Bolt)
      • CHHD Screws
      • Nut and Washers
      • Nylon Nuts and Bolts
      • Spacer and Standoff
    • Soldering Tools
    • Workbench Tools
  • Services
    • PCB Manufacturing Service
    • Custom Battery Pack
    • Online SLA 3D Printing Service
    • Online FDM 3D Printing Service
    • Metal Laser Cutting Service
    • Non-Metal Laser Cutting Service
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      • Diode
      • Transistor
      • Crystal Oscillators
    • Semiconductor ICs
      • Microcontroller ICs
      • Interface ICs
      • Clock, Timer and Counter ICs
      • Sensor ICs
      • Optocoupler ICs
      • Converter ICs
      • Comparator ICs
      • Driver ICs
      • Encoder ICs
      • Audio ICs
      • IC Base
    • LEDs and Indicators
      • LEDs Kit
      • Pilot Lamp Indicator
      • LEDs with Holders
      • Through Hole LED
      • SMD LED
    • Miscellaneous Component
      • Potentiometer
      • Fuse
      • Buzzer/Speaker
      • Aluminium Heat Sink
      • Bread Board and Zero PCB
    • Mechanical Switches
    • Power Connectors
    • RF Connectors
    • Interface Connector
    • Berg / FPC / IDC Connector
  • DIY Learning and Robot Kits
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      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Accessories
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    • FPV Antennas and Trans-Receivers
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  • E-Bike Parts
    • Ebike Kit
    • Ebike Motor and Controller
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  • 3D Printers and Parts
    • Creality 3D Printers
    • Electronics Parts
      • 3D Printer Display and Controllers
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • Stepper Motors and Accessories
      • 3D Printer Display and Controller
      • Limit Switch
    • Mechnical Parts
      • 3D Printer Heatbed and Accessories
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Linear Guide Rail
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • 3D Printer Couplings
      • Timing Belt and Pulley
      • Sleeves and Drag Chain
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      • ORANGE Premium Filaments
      • ESUN Filaments
      • Resins
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    • Custom Battery Pack
    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Micro LiPo Batteries
    • Lithium-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & Above
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HomeBlogsInterfacing Fingerprint Sensor With Arduino – Complete Guide

Interfacing Fingerprint Sensor With Arduino – Complete Guide

Blogs, Sensors  0  comments  1263 Views  Friday, May 21, 2021











This tutorial will learn how to interface the R307 fingerprint sensor with the Arduino, program it, and identify the fingerprint correctly using the Adafruit library.

Nowadays, fingerprint sensors play a vital role in security systems and at access points. Fingerprint application has existed for the identification purpose. Every person has a unique fingerprint, so it is the best way to identify an accessible person for a system.

The fingerprint is classified into five types whorl, right loop, left loop, tented, and arch. Features of the fingerprint recognition system are faster speed, lower cost. Also, consistency is more significant than other systems.

In this tutorial, we are going to interface this R307 fingerprint sensor with the Arduino. We are going to make an Arduino-based fingerprint scanner system.

How does a Fingerprint Sensor work?

How fingerprint sensor work.

Generally, the fingerprint scanner works by using optical rays. There are two types of fingerprint sensors, the optical one and the capacitive one. The optical fingerprint will flash a bright light to the finger. Also, it captures the image of the finger digitally.

Then it observes the finger pattern, turns this pattern into logic 0 or 1, and creates the source code for that fingerprint. This source code is the identification key of the fingerprint. If it matches, then and then the access will be granted by the sensor to a system.

A capacitive array circuit tracks every detail of the finger in the capacitive type of scanner. It uses the ridges of the fingerprint placed over the conductive plates, which change the charge stored in the capacitor, while the valleys leave the charge on the capacitor unchanged.

Then there is an operational amplifier circuit, which keeps track of every little detail of the fingerprint. This data is then recorded by using an analog to digital converter. Also, it gets analyzed by the ADC converter.

What is R307 Optical Fingerprint Scanner?

Working principle of optical fingerprint scanner

This fingerprint scanner involves two processes one is fingerprint enrollment, and another one is fingerprint matching. For this R307 scanner, each module has to identify the address.

When this module communicates with the system, each data source is transferred in the data package form containing the address item. The scanner responds to only that data package whose value matches the address value of the scanner.

When R307 communicates with the system, its protocol and instruction set apply for USB and UART communication modes. For Personal Computers, the USB mode is strongly recommended to get faster data exchanging speed for the fingerprint scanner.

Features of the fingerprint sensor

  • The R307 fingerprint sensor includes image collection as well as a chip algorithm.
  • Low power consumption, easy to use.
  • Excellent performance, small in size, cost-effective.
  • High-capacity image processing with high resolution.

Pinout of the R307 fingerprint scanner

Pin-out of R307 fingerprint sensor.
Pin numberNameTypeFunction/Description of pin
15VInput Power input
2GND_ Signal ground
3TXDOutput Data output. TTL logical level
4RXDInput Data input. TTL logical level
5TouchOutput Finger detection signal
63.3VInput Finger detection power

Components Required

  • Arduino Uno
  • R307 fingerprint sensor module
  • TFT display
  • Breadboard
  • Dupont cables

Interfacing R307 with Arduino

Interfacing of R307 fingerprint sensor with Arduino.

Now let us connect the sensor and the display with Arduino as given below.

  • Fingerprint Sensor Connections
  • Black Wire > Arduino GND
  • Red Wire > Arduino 5V
  • Green Wire > Digital Pin 2
  • White Wire > Digital Pin 3
  • Display Connections
  • Vcc > 5V pin of the Arduino
  • GND > Arduino GND pin
  • CS > Digital Pin 10
  • RST > Digital Pin 9
  • A0 > Digital Pin 8
  • SDA > Digital Pin 11
  • SCK > Digital Pin 13
  • LED > 3.3V pin of the Arduino

Installing Libraries for the Fingerprint scanner and the display

Now let's install the necessary libraries for the fingerprint scanner and the display as well. Firstly we need to download the Adafruit library for fingerprint scanner, which is the Adafruit GFX library. Secondly, we have to download Sumotoy's library for the display. Following are the links for the libraries. Click on the link and add them to the system.

  • https://github.com/adafruit/Adafruit-Fingerprint-Sensor-Library
  • https://github.com/adafruit/Adafruit-GFX-Library
  • https://github.com/sumotoy/TFT_ILI9163C

After successfully adding libraries to the system, open the Arduino software. We have to upload the code to our Arduino board. For this, we go to the File > Examples > Adafruit Fingerprint Sensor Library > Enrol. Here we will find the example code.

This code will ask us to enrol the fingerprint after uploading it to the Arduino. By doing this, we can add as many fingerprints as we want to add. Every fingerprint will have a separate ID for identification.

Code

After registering the fingerprint to the fingerprint sensor successfully, upload the below code to the Arduino to show this process on display.

   //////////////////////////////////////////////////////////////////
  //         Arduino Fingerprint Sensor Tutorial                  //
 //       Get the latest version of the code here:               //
//                                                              //
/////////////////////////////////////////////////////////////////


#include <SPI.h>
#include <Adafruit_GFX.h>
#include <TFT_ILI9163C.h>
#include <Adafruit_Fingerprint.h>
#include <SoftwareSerial.h>

// Color definitions
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0  
#define WHITE   0xFFFF

#define __CS 10
#define __DC 9
static const uint8_t icon [] PROGMEM = {
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x3f,0xc0,0x0,0x0,0x0,
0x0,0x0,0x3,0xff,0xf8,0x0,0x0,0x0,
0x0,0x0,0x7,0xff,0xfe,0x0,0x0,0x0,
0x0,0x0,0x1f,0xc0,0x7f,0x80,0x0,0x0,
0x0,0x0,0x3e,0x0,0x7,0xc0,0x0,0x0,
0x0,0x0,0x7c,0x0,0x3,0xe0,0x0,0x0,
0x0,0x0,0xfd,0xff,0x81,0xf0,0x0,0x0,
0x0,0x0,0xff,0xff,0xe0,0xf0,0x0,0x0,
0x0,0x1,0xff,0xff,0xf8,0x78,0x0,0x0,
0x0,0x1,0xff,0x80,0x7c,0x38,0x0,0x0,
0x0,0x3,0xfc,0x0,0xe,0x3c,0x0,0x0,
0x0,0x3,0xf0,0x0,0x7,0x1c,0x0,0x0,
0x0,0x7,0xc0,0x7f,0x83,0x8e,0x0,0x0,
0x0,0x7,0x83,0xff,0xe0,0xe,0x0,0x0,
0x0,0x7,0xf,0xff,0xf8,0xf,0x0,0x0,
0x0,0x6,0x1f,0x80,0xfc,0x7,0x0,0x0,
0x0,0x4,0x7e,0x0,0x3f,0x7,0x0,0x0,
0x0,0x0,0xf8,0x0,0xf,0x7,0x0,0x0,
0x0,0x0,0xf0,0x3e,0x7,0x87,0x0,0x0,
0x0,0x1,0xe1,0xff,0x83,0x83,0x80,0x0,
0x0,0x3,0xc3,0xff,0xc3,0xc3,0x80,0x0,
0x0,0x3,0xc7,0xc3,0xe1,0xc3,0x80,0x0,
0x0,0x3,0x8f,0x0,0xf1,0xe3,0x80,0x0,
0x0,0x7,0x1e,0x0,0x78,0xe3,0x80,0x0,
0x0,0x7,0x1e,0x3c,0x38,0xe3,0x80,0x0,
0x0,0x7,0x1c,0x7e,0x38,0xe3,0x80,0x0,
0x0,0xf,0x1c,0x7f,0x38,0xe3,0x80,0x0,
0x0,0xe,0x3c,0xf7,0x38,0x71,0x80,0x0,
0x0,0xe,0x38,0xe7,0x38,0x71,0xc0,0x0,
0x0,0xe,0x38,0xe7,0x38,0x71,0xc0,0x0,
0x0,0xe,0x38,0xe7,0x38,0x73,0xc0,0x0,
0x0,0xe,0x38,0xe3,0x98,0xe3,0xc0,0x0,
0x0,0xe,0x38,0xe3,0xb8,0xe3,0x80,0x0,
0x0,0x0,0x38,0xe3,0xf8,0xe3,0x80,0x0,
0x0,0x0,0x38,0xe3,0xf8,0xe3,0x80,0x0,
0x0,0x0,0x3c,0xf1,0xf1,0xe3,0x80,0x0,
0x0,0x6,0x1c,0x70,0x1,0xc7,0x80,0x0,
0x0,0xe,0x1c,0x78,0x3,0xc7,0x80,0x0,
0x0,0xf,0x1c,0x3e,0x7,0x87,0x0,0x0,
0x0,0xf,0x1e,0x3f,0xff,0x8f,0x0,0x0,
0x0,0xf,0x1e,0x1f,0xff,0x1f,0x0,0x0,
0x0,0xf,0xf,0x7,0xfc,0x3e,0x0,0x0,
0x0,0x7,0x87,0x80,0x0,0x7c,0x0,0x0,
0x0,0x7,0x87,0xe0,0x0,0xfc,0x0,0x0,
0x0,0x3,0xc3,0xf8,0x7,0xf8,0x0,0x0,
0x0,0x3,0xe1,0xff,0xff,0xe1,0x0,0x0,
0x0,0x1,0xe0,0x7f,0xff,0x83,0x0,0x0,
0x0,0x1,0xf8,0xf,0xfe,0x7,0x0,0x0,
0x0,0x0,0xfc,0x0,0x0,0xe,0x0,0x0,
0x0,0x0,0x3f,0x0,0x0,0x3c,0x0,0x0,
0x0,0x0,0x1f,0xe0,0x1,0xf8,0x0,0x0,
0x0,0x0,0x7,0xff,0xff,0xf0,0x0,0x0,
0x0,0x0,0x1,0xff,0xff,0xc0,0x0,0x0,
0x0,0x0,0x0,0x1f,0xfc,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0
};


TFT_ILI9163C display = TFT_ILI9163C(__CS,8, __DC);
SoftwareSerial mySerial(2, 3);
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);
int fingerprintID = 0;

void setup(void) {

  startFingerprintSensor();
  display.begin();
  displayLockScreen(); 
}

void loop() {

  fingerprintID = getFingerprintID();
  delay(50);
  if(fingerprintID == 1)
  {
    display.drawBitmap(30,35,icon,60,60,GREEN);
    delay(2000);
    displayUnlockedScreen();
    displayIoanna();
    delay(5000);
    display.fillScreen(BLACK);
    displayLockScreen();
  }

   if(fingerprintID == 2)
  {
    display.drawBitmap(30,35,icon,60,60,GREEN);
    delay(2000);
    displayUnlockedScreen();
    displayNick();
    delay(5000);
    display.fillScreen(BLACK);
    displayLockScreen();
  }
}


void displayUnlockedScreen()
{
   display.fillScreen(BLACK);
   display.drawRect(0,0,128,128,WHITE);
   
   display.setCursor(18,10);
   display.setTextColor(GREEN); 
   display.setTextSize(2);
   display.print("UNLOCKED");

   display.setCursor(20,50);
   display.setTextColor(WHITE); 
   display.setTextSize(2);
   display.print("WELCOME");
}
void displayNick()
{
  display.setCursor(35,75);
  display.setTextColor(WHITE); 
  display.setTextSize(2);
  display.print("NICK!");
}

void displayIoanna()
{
  display.setCursor(25,75);
  display.setTextColor(WHITE); 
  display.setTextSize(2);
  display.print("IOANNA!");
}

void displayLockScreen()
{
  display.drawRect(0,0,128,128,WHITE);
  display.setCursor(30,10);
  display.setTextColor(RED); 
  display.setTextSize(2);
  display.print("LOCKED");

  display.setCursor(10,100);
  display.setTextColor(WHITE); 
  display.setTextSize(1);
  display.print("Waiting for valid \n    fingerprint.");

  display.drawBitmap(30,35,icon,60,60,WHITE);
}
void startFingerprintSensor()
{
  Serial.begin(9600);
  finger.begin(57600);
  
  if (finger.verifyPassword()) {
    Serial.println("Found fingerprint sensor!");
  } else {
    Serial.println("Did not find fingerprint sensor");
  }
  Serial.println("Waiting for valid finger...");
}

int getFingerprintID() {
  uint8_t p = finger.getImage();
  if (p != FINGERPRINT_OK)  return -1;

  p = finger.image2Tz();
  if (p != FINGERPRINT_OK)  return -1;

  p = finger.fingerFastSearch();
  if (p != FINGERPRINT_OK)  return -1;
  
  // found a match!
  Serial.print("Found ID #"); Serial.print(finger.fingerID); 
  Serial.print(" with confidence of "); Serial.println(finger.confidence);
  return finger.fingerID; 
}

Final Words

Thanks For being here till the end. I hope all your doubts and concepts about the fingerprint scanner got cleared. If you like this article or have any suggestions, please let me know in the comment section.

 

 


Tags : arduino , biometric , fingerprint , fingerprint scanner , R307

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