Wireless Modules
Round Capacitive Fingerprint Recognition Modules
Circular capacitive semiconductor fingerprint modules with a round sensing area, designed for smart locks, safes and access control products.
Overview
This product line is specifically the round capacitive semiconductor fingerprint module — a circular sensing area using capacitive (semiconductor) sensing, not a square optical sensor. The distinction matters for product design: capacitive sensing reads the live skin surface, works in a compact opening, and suits the round button geometry used on smart locks, safes and door hardware.
The module handles fingerprint enrolment, template storage and 1:N matching internally, and exposes the result over a serial interface. That lets the lock firmware stay simple: request a match, receive an ID and a score, then drive the bolt or clutch.
We support both the module supply and the integration work around it — mounting geometry, ESD protection on the sensing ring, false-accept and false-reject tuning for the target user group, and the enrolment workflow in the mobile app.
Capabilities
What this covers
Round capacitive sensing area
Circular semiconductor sensing surface suited to round lock buttons, safe handles and access panels.
On-module matching
Enrolment, template storage and 1:N matching handled inside the module, with results returned over UART or USB.
Live-skin detection
Capacitive sensing responds to the live skin surface, which reduces the risk of a lifted print being accepted.
Integration support
Mechanical mounting drawings, ESD protection guidance and matching-threshold tuning for your user population.
Specification
Technical specifications
| Sensor type | Capacitive (semiconductor) sensing, round sensing area |
|---|---|
| Sensing geometry | Circular, dimensions confirmed per model |
| Interfaces | UART (TTL), USB (model dependent) |
| Matching mode | 1:N identification and 1:1 verification |
| Template storage | On-module template database, capacity model dependent |
| Supply voltage | Typically 3.3 V |
| Output | Match result, template ID, score, status codes |
| Operating temperature | −20 °C to +70 °C (model dependent) |
Only round capacitive semiconductor modules are offered under this category. Square optical sensor modules and fingerprint images are not used as substitutes for product photography.
Applications
Where it is used
- Fingerprint smart locks
- Safes and secure cabinets
- Access control panels
- Locker and cabinet locks
- Time and attendance terminals
- Portable secure storage
Questions
Frequently asked
Is this a capacitive or an optical sensor?
Capacitive semiconductor sensing with a round sensing area. We do not offer square optical modules under this category, and we do not use fingerprint images as product photos.
How many fingerprints can be stored?
Template capacity depends on the specific model. Tell us the expected number of users and we will confirm a suitable variant.
Can you tune the false-reject rate for outdoor use?
Yes. Matching thresholds are configurable, and we tune them against the conditions your users will actually encounter — dry skin, cold weather or worn fingertips.
Do you provide the lock firmware as well?
Yes. Fingerprint matching is only one part of a lock. We also develop the lock firmware, motor or clutch drive, keypad logic, Bluetooth app layer and cloud records.
Related
Continue exploring
Looking for round capacitive fingerprint for a specific product?
Send us the requirement, the target market and the volume you have in mind. We will come back with a technical response and an indicative quotation — usually within one business day.