WSAL13694 – Capacitive Fingerprint Reader/en
Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.
Summary
The capacitive fingerprint reader uses an STM32F105R8 processor and a commercial recognition algorithm over UART. The source does not provide complete pin or command details.
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Technical overview
- Onboard processor: STM32F105R8
- Interface: UART
- The source calls the device a capacitive sensor but also mentions “optical sensor” in the title; the exact sensing technology is unclear.
- A WAKE pin signals finger contact by outputting a high-level signal.
- When the finger is released, the WAKE pin returns to low level.
- The wake-up function operates only when the RST pin is held low and the module is in sleep mode.
- No 3D CAD/STEP file is available according to the source; only 2D images are provided.
- Technical support is available on weekdays from 9 AM to 6 PM GMT+8.
Notes and version constraints
- The source provides no specific UART commands, voltage, or current values.
- The combination of “capacitive” and “optical” in the description is contradictory and needs clarification.
- The absence of a 3D CAD file may cause issues during mechanical integration.
- No information on compatibility, certifications, warranty, or safety is present.
Source and revision record
- Capacitive Fingerprint Reader - Waveshare Wiki
- Source revision: 81852
- Captured: 2026-08-30T03:55:31+00:00
- SHA-256:
c4ec5be38c1e50dc980ee0446fe83682c66a144d6407886d1f02df5bdb9d31df