Multi-Protocol 2.4 GHz Wireless Analysis Device

src/
├── main.cpp             // setup() + loop() orchestrator
├── config.h             // GPIO pins, I2C, SPI, debounce
├── menu.cpp / menu.h    // Screen enum + input dispatch
├── buttons.cpp          // Debounced GPIO polling (300ms)
├── display.cpp          // SSD1306 OLED I2C wrapper
├── wifi_scanner.cpp     // Async WiFi scan + OLED render
├── wifi_deauth.cpp      // 802.11 deauth + pcap capture
├── evil_twin.cpp        // Rogue AP + captive portal
├── ble_jammer.cpp       // BLE/BT continuous carrier TX
├── scanner.cpp          // NRF24 126-ch spectrum sweep
├── nrf.cpp              // RF24 init, shared SPI config
├── sd_card.cpp          // PCAP/CSV file I/O
├── sd_browser.cpp       // SD card file browser UI
└── led.cpp              // WS2812B NeoPixel control

Screen currentScreen = SCREEN_MAIN_MENU;
const char* menuItems[] = {
    "Scanner", "Analyzer", "Evil Twin",
    "BLE Jammer", "WIFI Deauth",
    "WIFI Scanner", "Settings"
};

void menu_handle_input(int button) {
    switch (currentScreen) {
    case SCREEN_MAIN_MENU:
        if (button == BT_SELECT) {
            currentScreen = static_cast<Screen>(
                selectedIndex + 1);
            if (currentScreen == SCREEN_WIFI_SCANNER)
                start_scan();
            if (currentScreen == SCREEN_SCANNER) {
                scanner_init();
                refresh_scan();
            }
        }
        break;

    case SCREEN_WIFI_DEAUTH:
        switch (deauthstate) { ... }
        break;

    case SCREEN_BLE_JAMMER:
        switch (bleState) { ... }
        break;

    case SCREEN_EVIL_TWIN:
        switch (twinState) { ... }
        break;
    }
}

void loop() {
    int btn = buttons_read();
    if (btn != -1) {
        menu_handle_input(btn);
        menu_draw();
    }

    if (currentScreen == SCREEN_WIFI_DEAUTH
        && deauthstate == DEAUTH_ATTACKING) {
        continuous_deauth();
        PacketBuffer pktBuffer;
        while (xQueueReceive(packetQueue, &pktBuffer, 0))
            pcap_write_packet(pktBuffer.data,
                pktBuffer.length);
    }

    if (currentScreen == SCREEN_BLE_JAMMER
        && bleState == BLE_JAMMING)
        continuous_ble_jamming();

    if (currentScreen == SCREEN_SCANNER) {
        channel_scanning();
        scanner_draw();
    }

    if (currentScreen == SCREEN_EVIL_TWIN
        && twinState == TWIN_ATTACKING)
        evil_twin_loop();
}