{"product_id":"r307-optical-fingerprint-sensor-uart-module","title":"R307 Optical Fingerprint Sensor Module – UART Reader","description":"\u003cp\u003eThe R307 optical fingerprint sensor module captures and compares fingerprint templates for access-control prototypes, attendance projects, and embedded electronics. It includes onboard image processing and template storage and communicates with a host such as an Arduino, ESP32, or STM32 over TTL-level UART.\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e R307 optical fingerprint recognition module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHost interface:\u003c\/strong\u003e TTL UART serial commands for enrolment, search, matching, and template management\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e The R307 manual specifies 4.2–6.0 V DC for its main supply; verify the connector pinout and specific board revision before applying power\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatching modes:\u003c\/strong\u003e 1:1 verification and 1:N library search\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemplate storage:\u003c\/strong\u003e The R307 manual describes up to 1,000 templates; check the capacity reported by the supplied module because revisions can differ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefault UART baud rate:\u003c\/strong\u003e Often 57,600 bps in the R307 manual; module settings can be changed, so query or confirm before troubleshooting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage:\u003c\/strong\u003e One optical sensor module as pictured; confirm connector\/cable inclusion with the current batch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWiring and Use\u003c\/h2\u003e\u003cp\u003eMatch the actual connector pinout to the included product pinout image and the supplied module revision. Connect UART TX to host RX and UART RX to host TX, with a common ground and compatible logic levels. Do not assume a 3.3 V signal pin is the main power input. Enrol each user with repeated scans, then use the module's ID search or verification commands in your application. Treat stored fingerprint templates as sensitive data: restrict access, delete them when no longer needed, and obtain users' consent for enrolment.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eCan it be used with Arduino or ESP32?\u003c\/h3\u003e\u003cp\u003eYes, through a compatible UART connection and R307-compatible command library. Check power and logic levels for your specific controller.\u003c\/p\u003e\n\u003ch3\u003eDoes it store fingerprints by itself?\u003c\/h3\u003e\u003cp\u003eIt stores processed templates internally; the R307 manual lists a capacity up to 1,000, subject to the installed module revision.\u003c\/p\u003e\n\u003ch3\u003eIs it a USB fingerprint reader?\u003c\/h3\u003e\u003cp\u003eThis listing is for the sensor module. Use the exposed interface supported by the actual unit; a plug-and-play PC reader is not included.\u003c\/p\u003e\n\u003ch3\u003eWhat supply voltage should I use?\u003c\/h3\u003e\u003cp\u003eThe R307 manual specifies 4.2–6.0 V for the main power input. Confirm pinout and polarity before connecting.\u003c\/p\u003e\n\u003ch3\u003eWhat is enrolment?\u003c\/h3\u003e\u003cp\u003eThe module processes multiple scans of a finger to create a template and save it under an ID.\u003c\/p\u003e\n\u003ch3\u003eCan it operate a door lock directly?\u003c\/h3\u003e\u003cp\u003eNo. A microcontroller and a correctly rated relay or lock driver are needed for a lock circuit.\u003c\/p\u003e\n\u003ch3\u003eWhat is included?\u003c\/h3\u003e\u003cp\u003eOne R307 optical fingerprint module as pictured. Confirm whether a connection cable is supplied with this batch before ordering if it is essential.\u003c\/p\u003e","brand":"Embeded Studio","offers":[{"title":"Default Title","offer_id":62535490830706,"sku":"ES-R307-FINGERPRINT-UART","price":3000.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/7935\/3202\/files\/R307FINGERPRINTSENSOR.webp?v=1792173746","url":"https:\/\/embededstudio.com\/products\/r307-optical-fingerprint-sensor-uart-module","provider":"Embeded Studio","version":"1.0","type":"link"}