The **FPM3182H-R010CAP** is a high-performance fingerprint sensor module, typically utilized in biometric security systems, smart locks, and attendance devices. It is an integrated solution that combines an optical/capacitive sensing area with internal processing capabilities. --- ### 1. Component Specifications The following table highlights the key technical parameters for this specific module: | Parameter | Specification | | :--- | :--- | | **Type** | Capacitive Fingerprint Sensor | | **Supply Voltage (VDD)** | 3.3V DC | | **Interface** | UART (TTL) / USB 1.1 | | **Resolution** | 508 DPI | | **Sensing Area** | Approximately 10mm x 10mm | | **Storage Capacity** | Up to 1000 - 3000 templates (model dependent) | | **Operating Current** | < 40mA (Peak < 50mA) | | **Matching Speed** | < 0.5 seconds (1:N) | --- ### 2. Key Electronic Features The module is designed as an "All-in-One" system, meaning it contains several sub-electronic blocks: * **Capacitive Sensing Array:** Unlike optical scanners, this uses electrical current to map the ridges and valleys of a fingerprint, making it harder to spoof with high-resolution photos. * **On-board MCU:** It features an internal microcontroller that handles the complex algorithms for image processing, template generation, and matching (biometric engine). * **Communication Bridge:** It utilizes a standard **UART (Universal Asynchronous Receiver-Transmitter)** interface, allowing it to talk to Arduino, ESP32, or Raspberry Pi using simple `TX/RX` pins. * **Wake-up Pin:** Includes a "Touch Induction" output. When a finger is placed on the sensor, it pulls a pin high/low to wake the host microcontroller from sleep mode, saving power. --- ### 3. Pinout Configuration Most variants of the FPM3182H series use a 6-pin connector (1.0mm or 1.25mm pitch): 1. **VCC:** Power supply (3.3V). 2. **GND:** Ground. 3. **TX:** Data output (connect to MCU RX). 4. **RX:** Data input (connect to MCU TX). 5. **TOUCH:** Finger detection signal (3.3V output when touched). 6. **3.3V (Sense):** Power for the touch induction circuit. --- ### 4. Typical Connection Logic To interface this part with an external system, the logic follows this flow: ```cpp // Pseudocode for communication 1. Initialize Serial(57600 baud rate); 2. Send Command Packet (e.g., 0x01 for Get Image); 3. Wait for Acknowledge Packet (ACK); 4. If (Success) { Send Command (Generate Character File); Send Command (Search Library); } ```