graph LR;
    A[PMS5003 Air Quality Sensor Module] --> B((Power Supply));
    A --> C((Data Interface));
    B --> D(VCC);
    B --> E(GND);
    C --> F(TX);
    C --> G(RX);
    A --> H[Control Interface];
    H --> I{SET};
    H --> J{RST};

    classDef power fill:#f9f,stroke:#333,stroke-width:4px;
    classDef data fill:#bbf,stroke:#333,stroke-width:4px;
    classDef control fill:#bfb,stroke:#333,stroke-width:4px;

    B,D,E class power;
    C,F,G class data;
    H,I,J class control;