The **FPM3182H-R010DAP** is a high-performance fingerprint sensor module commonly utilized in biometric security systems, smart locks, and attendance terminals. It belongs to the optical fingerprint sensor family, known for durability and high image resolution. --- ### 1. Key Technical Specifications The following table outlines the core electronic and operational parameters of the module: | Parameter | Specification | | :--- | :--- | | **Sensor Type** | Optical CMOS Sensor | | **Interface** | UART (TTL Serial) / USB | | **Supply Voltage (VCC)** | DC 3.3V - 5.0V | | **Operating Current** | < 100mA (Peak) | | **Resolution** | 500 DPI | | **Fingerprint Capacity** | Typically 300 to 1000 templates (model dependent) | | **Matching Mode** | 1:1 (Verification) and 1:N (Identification) | | **Baud Rate** | 9600 - 115200 bps (Default: 57600) | --- ### 2. Functional Electronic Components The module is an "all-in-one" system, meaning it integrates several electronic stages into one package: * **Optical Prism & Lens:** Captures the physical ridges of the finger. * **CMOS Image Sensor:** Converts the reflected light from the prism into a digital grayscale image. * **DSP (Digital Signal Processor):** The "brain" of the module. It runs the extraction algorithms to identify "minutiae" (unique points) and converts them into a mathematical template. * **Onboard Flash Memory:** Stores the biometric templates locally, allowing for offline matching without an external database. --- ### 3. Pinout and Connection Most FPM-series modules use a 6-pin connector (usually a 1.0mm or 1.25mm pitch). | Pin No. | Name | Function | | :--- | :--- | :--- | | 1 | **VCC** | Power Input (3.3V to 5V) | | 2 | **TXD** | Data Output (Connect to MCU RX) | | 3 | **RXD** | Data Input (Connect to MCU TX) | | 4 | **GND** | Ground | | 5 | **Touch/IRQ** | Interrupt pin (High when a finger is detected) | | 6 | **3.3V_Out** | Regulated output (Optional) | --- ### 4. Integration Example (Arduino/MCU) To communicate with this part, you use standard UART commands. Below is a conceptual representation of how to initialize the serial port: ```cpp #include // RX (Pin 2), TX (Pin 3) on Arduino SoftwareSerial mySerial(2, 3); void setup() { Serial.begin(9600); mySerial.begin(57600); // Default baud rate for FPM sensors if (checkSensor()) { Serial.println("Fingerprint sensor detected!"); } else { Serial.println("Sensor not found."); } } ``` --- ### 5. Common Applications * **Access Control:** Door locks and safe boxes. * **ID Verification:** Handheld devices for identity management. * **Time & Attendance:** Employee clock-in systems.