Quelltext der Seite WSAL22059 – UART Fingerprint Sensor (E)/en

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'''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 UART Fingerprint Sensor (E) is a highly integrated capacitive fingerprint module with a Cortex processor and built-in recognition circuitry. It communicates over a serial interface (19200 baud, TTL level) and supports enrolling, feature extraction, and matching against up to 3000 stored templates.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL22059 WSAL22059 – Rectangle-shaped All-in-One Capacitive Fingerprint Sensor (E), Cortex Processor, UART]

== Technical overview ==
* Capacitive sensor type with 508 DPI resolution and a 160 × 160 pixel image at 8-bit grayscale.
* Housing/sensor area approx. 11.2 × 12.2 mm; the entire module chip integrates processor and sensor in a small form factor.
* Operating voltage: 3.3 V; operating current &lt; 50 mA; sleep-mode standby current &lt; 16 µA.
* Serial communication: UART at 19200 baud, TTL signal levels; connectors VIN, GND, RX, TX.
* Sleep/wake-up logic: RST at low level puts the module into sleep; when the sensor is touched while sleeping, WAKE outputs a high level and wakes the unit.
* Template storage capacity: 3000 entries; matching time under 200 ms for 1:N comparisons with N ≤ 100.
* False acceptance rate &lt; 0.001%; false rejection rate &lt; 0.1%.
* Operating environment: temperature −20 °C to 70 °C, relative humidity 40–85% RH (no condensation).
* Storage temperature: −40 °C to 85 °C; storage relative humidity &lt; 85% RH (no condensation).
* ESD tolerance: contact discharge 8 kV, air discharge 15 kV.

== Notes and version constraints ==
* The exact command list and protocol are not provided in the supplied text; consult the official documentation or demo program to obtain the precise syntax.
* Compatibility with specific microcontrollers (e.g., STM32, Raspberry Pi) is only mentioned generically; definitive wiring details must be verified per platform.
* The quoted rates (false acceptance/false rejection) are manufacturer figures under lab conditions; real-world values may vary depending on environmental conditions.
* Version-specific firmware updates or calibration steps are not described in the source; check the latest documentation before commissioning.
* The ESD figures refer to the component itself; system-level may require higher discharge ratings – please have your integration partner confirm.

== Source and revision record ==
* [https://www.waveshare.com/wiki/UART_Fingerprint_Sensor_(E) UART Fingerprint Sensor (E) - Waveshare Wiki]
* Source revision: 76699
* Captured: 2026-09-03T03:37:03+00:00
* SHA-256: <code>258b33974f2e4ecec1139996cb6a52dd0ed052d7d362269ddf3eb0357291b902</code>