LB-M5-U203
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The M5Stack Fingerprint 2 Unit combines an STM32G031G8U6 controller with an A-K323CP all-in-one fingerprint module. The capacitive sensor handles fingerprint acquisition, feature extraction, enrollment, comparison, storage, and search, providing a compact biometric input for embedded access and identity workflows.
The module stores up to 100 fingerprint entries and communicates through UART at 115200bps, 8N1. A multicolor LED ring provides local status feedback for enrollment, matching, errors, or application-defined states.
Fingerprint processing is handled by the module rather than requiring the host to implement the full recognition algorithm. The host can manage enrollment, matching, deletion, and application logic through the serial interface. Define clear administrative procedures for adding and removing templates, especially when devices are deployed in shared environments.
The fingerprint module is specified at 508 dpi with an 80 × 208 image pixel format. The design includes adaptive processing for dry and wet fingers, but real recognition performance still depends on finger placement, sensor cleanliness, skin condition, enrollment quality, and environmental conditions.
A fingerprint match should be only one part of a complete security architecture. Protect template-management commands, define retry and lockout behavior, log administrative changes where appropriate, and provide a secure recovery method. High-value access systems may require additional authentication factors and certified security controls.
UART at 115200bps 8N1 provides a straightforward connection to compatible controllers. Check voltage levels, shared ground, serial routing, startup timing, and command-response handling before enclosure integration. The RGB ring can show state locally without requiring a separate display.
Typical uses include smart locks, attendance terminals, identity verification prototypes, controlled equipment access, and compact security devices. Technical setup details are available in the M5Stack Fingerprint2 documentation.
At LogicBoundless, we believe that technology knows no borders. Our goal is to provide makers, engineers, and DIY enthusiasts worldwide with high-quality components through a reliable and transparent shipping process.
We offer worldwide shipping, with a primary focus on innovation hubs in the United States, Europe, and Asia.
Note: To ensure the safe arrival of sensitive electronic components, we do not ship to P.O. boxes or APO/FPO addresses.
All orders are shipped via YunExpress, our strategic logistics partner, ensuring efficient and trackable delivery from our fulfillment center in Shenzhen, China directly to your lab.
We offer tiered shipping rates based on your order value:
To provide the smoothest experience for your innovation, LogicBoundless covers the customs duties for all personal orders.
| Region | Estimated Delivery (Business Days) |
| United States | 7 - 12 Days |
| Europe | 7 - 14 Days |
| Asia | 5 - 10 Days |
| Rest of World | 10 - 20 Days |
