Matrix R305-Compatible Capacitive Fingerprint Sensor Module, UART
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Prices updated: 12 Oct 2026
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About this product
A capacitive fingerprint sensor module compatible with the R305, with an onboard DSP that handles image processing, feature extraction and matching. It stores up to 60 fingerprints in onboard flash and communicates over TTL UART at 57600 baud. Suited to access control, attendance and security projects, and listed as compatible with the Adafruit optical fingerprint sensor library.
Specifications
- Operating voltage
- 3.3 V DC
- Interface
- TTL UART
- Baud rate
- 57600
- Fingerprint capacity
- 60
- Sensor type
- Capacitive
- Connector
- 6-pin, 1 mm pitch on one end; female pins on the other
Frequently asked questions
Can I connect it directly to a 5 V Arduino?
No, not directly. The module operates at 3.3 V logic, so the listing recommends a level-shifter circuit between the module UART and a 5 V controller to protect it.
How do I wire it to a microcontroller?
Power the module at 3.3 V with a common ground, then cross the serial lines: the module TX goes to the controller RX, and the module RX goes to the controller TX, through the level shifter. Check the pin order on the connector against the module documentation before powering it.
