### Overview of FPM3022H-R010BKP The **FPM3022H-R010BKP** is an industrial-grade fingerprint recognition module. It is a highly integrated biometric sensor that combines optical sensing technology with onboard processing capabilities for fingerprint enrollment, matching, and storage. --- ### Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Sensor Type** | Optical CMOS | | **Interface** | UART (TTL) / USB 1.1 | | **Resolution** | 500 DPI | | **Supply Voltage** | DC 3.6V - 6.0V | | **Operating Current** | < 120mA (Peak) | | **Storage Capacity** | Up to 1,000 Fingerprints (Typical) | | **Matching Mode** | 1:1 and 1:N | --- ### Core Electronic Components The module functions as a "System on Module" (SoM). Below are the primary electronic sections: #### 1. Optical Imaging System * **CMOS Image Sensor:** Captures the high-resolution image of the fingerprint ridges. * **LED Illumination:** High-intensity LEDs (usually green or blue) illuminate the finger through a prism to create high contrast for the sensor. * **Prism:** A specialized glass/plastic lens that uses Total Internal Reflection (TIR) to map the physical ridges of the finger into a digital image. #### 2. Digital Signal Processor (DSP) * **Onboard MCU:** The module contains a dedicated high-speed processor that runs the fingerprint algorithm. * **Function:** It performs image enhancement, minutiae extraction (identifying unique points like loops and whorls), and template generation. * **Security:** Stores the mathematical representation of the fingerprint (templates) rather than the actual raw image to enhance security. #### 3. Communication Interface * **UART (Universal Asynchronous Receiver-Transmitter):** The primary method for communicating with external microcontrollers (like Arduino, ESP32, or STM32). * **Baud Rate:** Usually defaults to 57600 bps. --- ### Pin Configuration (Standard 6-Pin Connector) The module typically uses a 6-pin SH1.0 or similar connector: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **VCC** | Power Input (3.6V - 6V) | | 2 | **GND** | Ground | | 3 | **TXD** | Data Output (Connect to MCU RX) | | 4 | **RXD** | Data Input (Connect to MCU TX) | | 5 | **IRQ** | Interrupt Output (Wakes up MCU when finger is detected) | | 6 | **V-Touch** | Touch Sense Power (3.3V) | --- ### Typical Circuit Connection ```c /* Simple UART Connection Diagram */ [ FPM3022H Module ] [ Microcontroller ] VCC (Red) <------> 5V GND (Black) <------> GND TXD (Yellow) ------> RX Pin RXD (White) <------ TX Pin ``` ---