Fingerprint Sensor R503 – KSH 3,000 at HIMASTORES Mombasa – best electronics in Kenya
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Fingerprint Sensor R503

SKU: HMJ061 Category: Sensors
KSH 3,000.00
Out of Stock

Product Description

R503 Capacitive Fingerprint Sensor Module

Rugged Panel-Mount Biometric Module for Secure Access Systems

The R503 is a rugged, panelmount capacitive fingerprint sensor with an integrated DSP chip and a customizable bicolor LED ring. It simplifies adding biometric authentication to access control systems, smart locks, and attendance tracking projects by handling image processing and fingerprint matching internally.

Builtin DSP Processor Offloads fingerprint rendering, feature finding, and searching from the host microcontroller
200Fingerprint Onboard Storage Stores templates directly on the module's flash memory for autonomous operation
Critical: Power supply is 3.3V DC only. Applying 5V may damage the module.
For 3.3V microcontrollers like ESP32, connect directly; for 5V systems, use a logic level converter.
Use Arduino, CircuitPython, or ESP-IDF libraries for simple enrollment and verification.

Technical Specifications

ParameterValue
Sensor TypeCapacitive
Resolution508 DPI
Sensing Array192x192 pixels
InterfaceUART (TTL), default 57600 baud
Operating VoltageDC 3.3V
Fingerprint Capacity200 templates
Scanning Speed< 0.2 seconds
Verification Speed< 0.3 seconds
Matching Mode1:1 and 1:N
FRR / FAR≤1 / ≤0.001%
Working Current20mA (fingerprint acquisition)
Standby Current2µA (finger detection)
Working Environment-20°C to +60°C
DimensionsOuter: 28mm, Thread: M25

= Key Features =

+AllinOne Design - Combines image collection, algorithm processing, and storage in a compact metal body

+Configurable BiColor LED Ring Programmable red, blue, and purple LED effects for status feedback

+High Recognition Rate - Works reliably with dry, wet, lightly textured, and aged fingerprints

+Robust Construction Metal housing for durability, panelmount design with M25 nut for secure installation

+Low Power - 20mA active / 2µA standby

= Applications =

  1. Access control and electronic door locks
  2. Biometric attendance and time tracking systems
  3. Smart safes and security deposit boxes
  4. Motorcycle and vehicle anti-theft systems
  5. IoT and embedded security projects

Pin Configuration

PinColorNameDescription
1RedVCCDC 3.3V power supply
2BlackGNDSignal ground
3YellowTXDData output (TTL logic)
4Green/Brown/PurpleRXDData input (TTL logic)
5BlueWAKEUPFinger detection signal
6White3.3VTouch induction power supply

> Connecting to ESP32: VCC to 3.3V, GND to GND, TX to RX (e.g., GPIO18), RX to TX (e.g., GPIO17)

For USB testing, connect to a 3.3V USBtoTTL converter; ensure the converter supplies 3.3V, not 5V.
Applying 5V to the VCC pin will damage the module
Ensure TX to RX and RX to TX cross-connection for proper UART communication

Troubleshooting

Module not communicating:

  • Verify 3.3V power supply and GND connections
  • Check TX/RX crossover (sensor TX to host RX, sensor RX to host TX)
  • Ensure baud rate matches default 57600 (or 9600)

No fingerprint detection:

  • Clean sensor surface
  • Check if wakeup pin indicates finger presence
  • For 5V systems, add logic-level converter