{"product_id":"r307-finger-print-sensor-module-optical-biometric-scanner","title":"R307 Finger Print Sensor Module | Optical Biometric Scanner","description":"\u003ch1\u003eR307 Finger Print Sensor Module – Optical Biometric Scanner with UART Interface\u003c\/h1\u003e\n\n\u003cp\u003eThe R307 Finger Print Sensor Module is an optical biometric scanner that captures high-resolution fingerprint images for identity verification. It integrates a powerful DSP and a large-capacity fingerprint library, making it suitable for access control, time attendance, and security projects. With its fast matching speed and low power consumption, it is a reliable choice for embedded applications.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Type\u003c\/td\u003e\n\u003ctd\u003eOptical\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e500 DPI\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFingerprint Capacity\u003c\/td\u003e\n\u003ctd\u003e1000 templates\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUART (TTL, 3.3V\/5V logic)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMatching Speed\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;1 second (1:1 verification)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-servo-door-lock\"\u003eBiometric door lock system using Arduino and solenoid\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eEmployee attendance tracker with real-time clock and LCD\u003c\/li\u003e\n  \u003cli\u003eSecure safe locker that opens only for authorized fingerprints\u003c\/li\u003e\n  \u003cli\u003ePC or device login authenticator to replace passwords\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works seamlessly with any microcontroller that has a UART interface, such as Arduino Uno, Mega, Nano, or Raspberry Pi. It supports both 3.3V and 5V logic levels, so no level shifting is required for most boards. The Adafruit Fingerprint Sensor Library for Arduino provides ready-to-use examples for enrollment and matching.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the module’s TX pin to the microcontroller’s RX, and RX to TX. Supply 3.3V or 5V depending on your board’s logic level. For long cable runs, add a 10K pull-up resistor on the data lines. Avoid touching the sensor window with bare fingers to maintain image clarity.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino UNO?\u003c\/summary\u003e\u003cp\u003eYes, it works perfectly with Arduino UNO using SoftwareSerial on pins 2 and 3. Use the Adafruit Fingerprint library for quick setup.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I enroll new fingerprints?\u003c\/summary\u003e\u003cp\u003eRun the ‘enroll’ example sketch from the library. It will guide you through capturing and storing a fingerprint template in the module’s memory.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it be used outdoors?\u003c\/summary\u003e\u003cp\u003eThe module operates in temperatures from -20°C to 60°C but is not waterproof. Protect it from direct rain and dust with an enclosure.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444958191981,"sku":"CDN-0317","price":990.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_c2f1d8d7-1bbd-46ff-af50-f82eae6ce7e8.jpg?v=1781512441","url":"https:\/\/compoden.com\/products\/r307-finger-print-sensor-module-optical-biometric-scanner","provider":"Compoden","version":"1.0","type":"link"}