feat: BladeRF and HydraSDR RFOne support (closes #121, closes #203)

- BladeRF 2.0 micro / x40 / x115 detected via SoapyBladeRF (47 MHz–6 GHz,
  TX capable, gain 0–66 dB)
- HydraSDR RFOne detected via SoapyHydraSDR (24 MHz–1800 MHz, RX only,
  linear gain 0–21)
- Both follow the established SoapySDR command-builder pattern and support
  FM demod, ADS-B, ISM, AIS, and I/Q capture
- Bump version to 2.31.0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -60,6 +60,17 @@ data/radiosonde/
 # SDR capture files (large IQ recordings)
 data/subghz/captures/
 
+# Kismet capture files
+*.kismet
+*.kismet.json
+
+# ADS-B aircraft database (downloaded at runtime)
+aircraft_db.json
+aircraft_db_meta.json
+
+# SoapySDR build directory (compiled during setup, contains its own .git)
+SoapySDR/
+
 # Env files
 .env
 .env.*

CHANGELOG.md

@@ -2,6 +2,23 @@
 
 All notable changes to iNTERCEPT will be documented in this file.
 
+## [2.31.0] - 2026-07-07
+
+### Added
+- **BladeRF support** — bladeRF 2.0 micro (47 MHz – 6 GHz) and bladeRF x40/x115 (300 MHz – 3.8 GHz) detected and usable via SoapyBladeRF. TX capable. Supports FM demod, ADS-B, ISM, AIS, and I/Q capture.
+- **HydraSDR RFOne support** — Detected and usable via SoapyHydraSDR (24 MHz – 1800 MHz, RX only, 10 MHz instantaneous bandwidth). Supports FM demod, ADS-B, ISM, AIS, and I/Q capture.
+
+---
+
+## [2.30.0] - 2026-07-07
+
+### Added
+- **APRS station export** — `GET /aprs/export?format=json|csv` downloads all currently tracked APRS stations, consistent with the existing WiFi/Bluetooth/AIS export pattern.
+- **USRP support** — Ettus USRP devices (N200, B200, B210) are now detected and usable via the SoapyUHD bridge. FM demod, ADS-B, ISM, AIS, and I/Q capture all supported through the existing SoapySDR toolchain.
+- **MQTT data export** — Optional MQTT publisher that broadcasts decoded events from every module to a configurable broker. Disabled by default; set `INTERCEPT_MQTT_BROKER` to enable. Topics follow the pattern `<prefix>/<module>/<event_type>` (e.g. `intercept/aprs/packet`). Configure with `INTERCEPT_MQTT_PORT`, `INTERCEPT_MQTT_USER`, `INTERCEPT_MQTT_PASSWORD`, `INTERCEPT_MQTT_TOPIC_PREFIX`, `INTERCEPT_MQTT_RETAIN`.
+
+---
+
 ## [2.29.0] - 2026-07-05
 
 ### Added

config.py

@@ -7,10 +7,27 @@ import os
 import sys
 
 # Application version
-VERSION = "2.29.0"
+VERSION = "2.31.0"
 
 # Changelog - latest release notes (shown on welcome screen)
 CHANGELOG = [
+    {
+        "version": "2.31.0",
+        "date": "July 2026",
+        "highlights": [
+            "Feat: BladeRF support — bladeRF 2.0 micro and x40/x115 detected and usable via SoapyBladeRF (47 MHz – 6 GHz, TX capable)",
+            "Feat: HydraSDR RFOne support — detected and usable via SoapyHydraSDR (24 MHz – 1800 MHz, RX only)",
+        ],
+    },
+    {
+        "version": "2.30.0",
+        "date": "July 2026",
+        "highlights": [
+            "Feat: APRS station export — download all tracked stations as JSON or CSV via /aprs/export",
+            "Feat: USRP support — Ettus USRP N200/B200/B210 detected and usable via SoapyUHD bridge",
+            "Feat: MQTT data export — publish decoded events from all modules to a configurable broker (set INTERCEPT_MQTT_BROKER to enable)",
+        ],
+    },
     {
         "version": "2.29.0",
         "date": "July 2026",
@@ -534,6 +551,14 @@ ALERT_WEBHOOK_URL = _get_env("ALERT_WEBHOOK_URL", "")
 ALERT_WEBHOOK_SECRET = _get_env("ALERT_WEBHOOK_SECRET", "")
 ALERT_WEBHOOK_TIMEOUT = _get_env_int("ALERT_WEBHOOK_TIMEOUT", 5)
 
+# MQTT data export (optional — disabled when MQTT_BROKER is empty)
+MQTT_BROKER = _get_env("MQTT_BROKER", "")
+MQTT_PORT = _get_env_int("MQTT_PORT", 1883)
+MQTT_USER = _get_env("MQTT_USER", "")
+MQTT_PASSWORD = _get_env("MQTT_PASSWORD", "")
+MQTT_TOPIC_PREFIX = _get_env("MQTT_TOPIC_PREFIX", "intercept")
+MQTT_RETAIN = _get_env_bool("MQTT_RETAIN", False)
+
 # Admin credentials
 ADMIN_USERNAME = _get_env("ADMIN_USERNAME", "admin")
 ADMIN_PASSWORD = _get_env("ADMIN_PASSWORD", "admin")

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "intercept"
-version = "2.27.0"
+version = "2.31.0"
 description = "Signal Intelligence Platform - Pager/433MHz/ADS-B/Satellite/WiFi/Bluetooth"
 readme = "README.md"
 requires-python = ">=3.9"

requirements.txt

@@ -53,6 +53,9 @@ websocket-client>=1.6.0
 # System health monitoring (optional - graceful fallback if unavailable)
 psutil>=5.9.0
 
+# MQTT data export (optional - only needed if INTERCEPT_MQTT_BROKER is set)
+paho-mqtt>=1.6.0
+
 # Production WSGI server (optional - falls back to Flask dev server)
 gunicorn>=21.2.0
 gevent>=23.9.0

routes/aprs.py

@@ -1653,6 +1653,48 @@ def get_stations() -> Response:
     return jsonify({"stations": list(aprs_stations.values()), "count": len(aprs_stations)})
 
 
+@aprs_bp.route("/export")
+def export_data() -> Response:
+    """Export tracked APRS stations as JSON or CSV.
+
+    Query params:
+        format: 'json' or 'csv' (default: json)
+    """
+    export_format = request.args.get("format", "json").lower()
+    stations = list(aprs_stations.values())
+    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
+
+    if export_format == "csv":
+        import io
+
+        output = io.StringIO()
+        writer = csv.writer(output)
+        writer.writerow(["Callsign", "Latitude", "Longitude", "Symbol", "Packet Type", "Last Seen"])
+        for s in stations:
+            writer.writerow(
+                [
+                    s.get("callsign", ""),
+                    s.get("lat", ""),
+                    s.get("lon", ""),
+                    s.get("symbol", ""),
+                    s.get("packet_type", ""),
+                    s.get("last_seen", ""),
+                ]
+            )
+        response = Response(output.getvalue(), mimetype="text/csv")
+        response.headers["Content-Disposition"] = f"attachment; filename=aprs_stations_{timestamp}.csv"
+        return response
+
+    data = {
+        "stations": stations,
+        "count": len(stations),
+        "exported_at": datetime.now().isoformat(),
+    }
+    response = Response(json.dumps(data, indent=2), mimetype="application/json")
+    response.headers["Content-Disposition"] = f"attachment; filename=aprs_stations_{timestamp}.json"
+    return response
+
+
 @aprs_bp.route("/data")
 def aprs_data() -> Response:
     """Get APRS data snapshot for remote controller polling compatibility."""

static/js/components/sensor-dashboard.js

@@ -162,17 +162,20 @@ const SensorDashboard = (function () {
     // ---- Show / hide / reset ----
 
     function applyViewState(mode) {
-        const view   = document.getElementById('sensorDashboardView');
-        const output = document.getElementById('output');
+        const view    = document.getElementById('sensorDashboardView');
+        const output  = document.getElementById('output');
+        const feedCol = document.querySelector('.pdir-feed-col');
 
         if (mode === 'sensor') {
             const saved = localStorage.getItem(STORAGE_KEY) || 'dashboard';
             const isDash = saved === 'dashboard';
-            if (view)   view.style.display   = isDash ? 'block' : 'none';
-            if (output) output.style.display = isDash ? 'none'  : '';
+            if (view)    view.style.display    = isDash ? 'block' : 'none';
+            if (output)  output.style.display  = isDash ? 'none'  : '';
+            if (feedCol) feedCol.style.display = isDash ? 'none'  : '';
             _updateToggle(isDash);
         } else {
-            if (view) view.style.display = 'none';
+            if (view)    view.style.display    = 'none';
+            if (feedCol) feedCol.style.display = '';
         }
     }
 

utils/event_pipeline.py

@@ -5,6 +5,7 @@ from __future__ import annotations
 from typing import Any
 
 from utils.alerts import get_alert_manager
+from utils.mqtt import publish as mqtt_publish
 from utils.recording import get_recording_manager
 from utils.temporal_patterns import get_pattern_detector
 
@@ -54,6 +55,12 @@ def process_event(mode: str, event: dict | Any, event_type: str | None = None) -
         # Alert failures should never break streaming
         pass
 
+    try:
+        mqtt_publish(mode, event, event_type)
+    except Exception:
+        # MQTT failures should never break streaming
+        pass
+
 
 def _extract_device_id(event: dict) -> str | None:
     for field in DEVICE_ID_FIELDS:

utils/mqtt.py

@@ -0,0 +1,107 @@
+"""
+Optional MQTT data export.
+
+Publishes decoded events from all modules to a configurable MQTT broker.
+Disabled when INTERCEPT_MQTT_BROKER is not set — no broker, no connection,
+no error.
+
+Topics follow the pattern:
+    <prefix>/<module>/<event_type>
+
+Payload is JSON, matching the SSE event structure already used by the
+frontend.  Configure via environment variables:
+
+    INTERCEPT_MQTT_BROKER        broker hostname / IP  (required to enable)
+    INTERCEPT_MQTT_PORT          port (default 1883)
+    INTERCEPT_MQTT_USER          username (optional)
+    INTERCEPT_MQTT_PASSWORD      password (optional)
+    INTERCEPT_MQTT_TOPIC_PREFIX  topic prefix (default "intercept")
+    INTERCEPT_MQTT_RETAIN        retain flag (default false)
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import threading
+from typing import Any
+
+logger = logging.getLogger(__name__)
+
+_client = None
+_lock = threading.Lock()
+_enabled: bool | None = None  # None = not yet initialised
+
+
+def _get_config():
+    import config
+
+    return config
+
+
+def _is_enabled() -> bool:
+    global _enabled
+    if _enabled is None:
+        cfg = _get_config()
+        _enabled = bool(cfg.MQTT_BROKER)
+    return _enabled
+
+
+def _get_client():
+    """Return a connected paho MQTT client, creating it on first call."""
+    global _client
+    if _client is not None:
+        return _client
+
+    with _lock:
+        if _client is not None:
+            return _client
+
+        try:
+            import paho.mqtt.client as mqtt
+        except ImportError:
+            logger.warning("paho-mqtt not installed; MQTT export disabled. Install with: pip install paho-mqtt")
+            return None
+
+        cfg = _get_config()
+
+        client = mqtt.Client(client_id="intercept", clean_session=True)
+        if cfg.MQTT_USER:
+            client.username_pw_set(cfg.MQTT_USER, cfg.MQTT_PASSWORD or None)
+
+        try:
+            client.connect(cfg.MQTT_BROKER, cfg.MQTT_PORT, keepalive=60)
+            client.loop_start()
+            logger.info("MQTT connected to %s:%d (prefix=%s)", cfg.MQTT_BROKER, cfg.MQTT_PORT, cfg.MQTT_TOPIC_PREFIX)
+            _client = client
+        except Exception as exc:
+            logger.warning("MQTT connect failed: %s — export disabled until restart", exc)
+            return None
+
+    return _client
+
+
+def publish(mode: str, event: dict[str, Any], event_type: str | None = None) -> None:
+    """Publish a decoded event to the MQTT broker.
+
+    Args:
+        mode:       Source module name (e.g. 'aprs', 'adsb', 'pager').
+        event:      The decoded event dict.
+        event_type: Optional sub-type string (e.g. 'packet', 'aircraft').
+    """
+    if not _is_enabled():
+        return
+
+    client = _get_client()
+    if client is None:
+        return
+
+    cfg = _get_config()
+    subtopic = event_type or mode
+    topic = f"{cfg.MQTT_TOPIC_PREFIX}/{mode}/{subtopic}"
+
+    try:
+        payload = json.dumps(event, default=str)
+        client.publish(topic, payload, retain=cfg.MQTT_RETAIN)
+    except Exception as exc:
+        logger.debug("MQTT publish error on %s: %s", topic, exc)

utils/sdr/__init__.py

@@ -27,11 +27,14 @@ from typing import Optional
 
 from .airspy import AirspyCommandBuilder
 from .base import CommandBuilder, SDRCapabilities, SDRDevice, SDRType
+from .bladerf import BladeRFCommandBuilder
 from .detection import detect_all_devices, invalidate_device_cache, probe_rtlsdr_device
 from .hackrf import HackRFCommandBuilder
+from .hydrasdr import HydraSDRCommandBuilder
 from .limesdr import LimeSDRCommandBuilder
 from .rtlsdr import RTLSDRCommandBuilder
 from .sdrplay import SDRPlayCommandBuilder
+from .usrp import USRPCommandBuilder
 from .validation import (
     SDRValidationError,
     get_capabilities_for_type,
@@ -53,6 +56,9 @@ class SDRFactory:
         SDRType.HACKRF: HackRFCommandBuilder,
         SDRType.AIRSPY: AirspyCommandBuilder,
         SDRType.SDRPLAY: SDRPlayCommandBuilder,
+        SDRType.USRP: USRPCommandBuilder,
+        SDRType.BLADE_RF: BladeRFCommandBuilder,
+        SDRType.HYDRA_SDR: HydraSDRCommandBuilder,
     }
 
     @classmethod
@@ -211,6 +217,9 @@ __all__ = [
     "HackRFCommandBuilder",
     "AirspyCommandBuilder",
     "SDRPlayCommandBuilder",
+    "USRPCommandBuilder",
+    "BladeRFCommandBuilder",
+    "HydraSDRCommandBuilder",
     # Validation
     "SDRValidationError",
     "validate_frequency",

utils/sdr/base.py

@@ -20,9 +20,9 @@ class SDRType(Enum):
     HACKRF = "hackrf"
     AIRSPY = "airspy"
     SDRPLAY = "sdrplay"
-    # Future support
-    # USRP = "usrp"
-    # BLADE_RF = "bladerf"
+    USRP = "usrp"
+    BLADE_RF = "bladerf"
+    HYDRA_SDR = "hydrasdr"
 
 
 @dataclass

utils/sdr/bladerf.py

@@ -0,0 +1,153 @@
+"""
+BladeRF command builder implementation.
+
+Uses SoapySDR (via SoapyBladeRF) for all signal processing tasks.
+Targets bladeRF 2.0 micro (47 MHz – 6 GHz) but is compatible with
+bladeRF x40/x115 (300 MHz – 3.8 GHz) — the SoapySDR layer handles
+per-device frequency clamping transparently.
+
+Requires: libbladeRF, SoapySDR, SoapyBladeRF module installed.
+"""
+
+from __future__ import annotations
+
+from utils.dependencies import get_tool_path
+
+from .base import CommandBuilder, SDRCapabilities, SDRDevice, SDRType
+
+
+class BladeRFCommandBuilder(CommandBuilder):
+    """BladeRF command builder using SoapySDR / SoapyBladeRF."""
+
+    CAPABILITIES = SDRCapabilities(
+        sdr_type=SDRType.BLADE_RF,
+        freq_min_mhz=47.0,  # bladeRF 2.0 micro lower bound
+        freq_max_mhz=6000.0,
+        gain_min=0.0,
+        gain_max=66.0,  # LNA (0/3/6) + RXVGA1 (5-30) + RXVGA2 (0-30)
+        sample_rates=[1000000, 2000000, 4000000, 8000000, 10000000, 20000000, 40000000],
+        supports_bias_t=False,
+        supports_ppm=False,
+        tx_capable=True,
+        supports_iq_capture=True,
+    )
+
+    def _build_device_string(self, device: SDRDevice) -> str:
+        """Build SoapySDR device string for BladeRF."""
+        if device.serial and device.serial not in ("N/A", "Unknown"):
+            return f"driver=bladerf,serial={device.serial}"
+        return "driver=bladerf"
+
+    def build_fm_demod_command(
+        self,
+        device: SDRDevice,
+        frequency_mhz: float,
+        sample_rate: int = 22050,
+        gain: float | None = None,
+        ppm: int | None = None,
+        modulation: str = "fm",
+        squelch: int | None = None,
+        bias_t: bool = False,
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        rx_fm_path = get_tool_path("rx_fm") or "rx_fm"
+        cmd = [
+            rx_fm_path,
+            "-d",
+            device_str,
+            "-f",
+            f"{frequency_mhz}M",
+            "-M",
+            modulation,
+            "-s",
+            str(sample_rate),
+        ]
+        if gain is not None and gain > 0:
+            cmd.extend(["-g", str(int(gain))])
+        if squelch is not None and squelch > 0:
+            cmd.extend(["-l", str(squelch)])
+        cmd.append("-")
+        return cmd
+
+    def build_adsb_command(self, device: SDRDevice, gain: float | None = None, bias_t: bool = False) -> list[str]:
+        device_str = self._build_device_string(device)
+        cmd = ["readsb", "--net", "--device-type", "soapysdr", "--device", device_str, "--quiet"]
+        if gain is not None:
+            cmd.extend(["--gain", str(int(gain))])
+        return cmd
+
+    def build_ism_command(
+        self,
+        device: SDRDevice,
+        frequency_mhz: float = 433.92,
+        gain: float | None = None,
+        ppm: int | None = None,
+        bias_t: bool = False,
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        cmd = ["rtl_433", "-d", device_str, "-f", f"{frequency_mhz}M", "-F", "json"]
+        if gain is not None and gain > 0:
+            cmd.extend(["-g", str(int(gain))])
+        return cmd
+
+    def build_ais_command(
+        self,
+        device: SDRDevice,
+        gain: float | None = None,
+        bias_t: bool = False,
+        tcp_port: int = 10110,
+        udp_host: str | None = None,
+        udp_port: int | None = None,
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        cmd = [
+            "AIS-catcher",
+            "-d",
+            f"soapysdr -d {device_str}",
+            "-S",
+            str(tcp_port),
+            "-o",
+            "5",
+            "-q",
+        ]
+        if gain is not None and gain > 0:
+            cmd.extend(["-gr", "tuner", str(int(gain))])
+        if udp_host and udp_port:
+            cmd.extend(["-u", udp_host, str(udp_port)])
+        return cmd
+
+    def build_iq_capture_command(
+        self,
+        device: SDRDevice,
+        frequency_mhz: float,
+        sample_rate: int = 2048000,
+        gain: float | None = None,
+        ppm: int | None = None,
+        bias_t: bool = False,
+        output_format: str = "cu8",
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        freq_hz = int(frequency_mhz * 1e6)
+        rx_sdr_path = get_tool_path("rx_sdr") or "rx_sdr"
+        cmd = [
+            rx_sdr_path,
+            "-d",
+            device_str,
+            "-f",
+            str(freq_hz),
+            "-s",
+            str(sample_rate),
+            "-F",
+            "CU8",
+        ]
+        if gain is not None and gain > 0:
+            cmd.extend(["-g", str(int(gain))])
+        cmd.append("-")
+        return cmd
+
+    def get_capabilities(self) -> SDRCapabilities:
+        return self.CAPABILITIES
+
+    @classmethod
+    def get_sdr_type(cls) -> SDRType:
+        return SDRType.BLADE_RF

utils/sdr/detection.py

@@ -49,10 +49,13 @@ def _get_capabilities_for_type(sdr_type: SDRType) -> SDRCapabilities:
     """Get default capabilities for an SDR type."""
     # Import here to avoid circular imports
     from .airspy import AirspyCommandBuilder
+    from .bladerf import BladeRFCommandBuilder
     from .hackrf import HackRFCommandBuilder
+    from .hydrasdr import HydraSDRCommandBuilder
     from .limesdr import LimeSDRCommandBuilder
     from .rtlsdr import RTLSDRCommandBuilder
     from .sdrplay import SDRPlayCommandBuilder
+    from .usrp import USRPCommandBuilder
 
     builders = {
         SDRType.RTL_SDR: RTLSDRCommandBuilder,
@@ -60,6 +63,9 @@ def _get_capabilities_for_type(sdr_type: SDRType) -> SDRCapabilities:
         SDRType.HACKRF: HackRFCommandBuilder,
         SDRType.AIRSPY: AirspyCommandBuilder,
         SDRType.SDRPLAY: SDRPlayCommandBuilder,
+        SDRType.USRP: USRPCommandBuilder,
+        SDRType.BLADE_RF: BladeRFCommandBuilder,
+        SDRType.HYDRA_SDR: HydraSDRCommandBuilder,
     }
 
     builder_class = builders.get(sdr_type)
@@ -90,9 +96,9 @@ def _driver_to_sdr_type(driver: str) -> SDRType | None:
         "airspy": SDRType.AIRSPY,
         "airspyhf": SDRType.AIRSPY,  # Airspy HF+ uses same builder
         "sdrplay": SDRType.SDRPLAY,
-        # Future support
-        # 'uhd': SDRType.USRP,
-        # 'bladerf': SDRType.BLADE_RF,
+        "uhd": SDRType.USRP,
+        "bladerf": SDRType.BLADE_RF,
+        "hydrasdr": SDRType.HYDRA_SDR,
     }
     return mapping.get(driver.lower())
 

utils/sdr/hydrasdr.py

@@ -0,0 +1,157 @@
+"""
+HydraSDR RFOne command builder implementation.
+
+Uses SoapySDR (via SoapyHydraSDR plugin) for all signal processing tasks.
+The RFOne is an RX-only receiver covering 24 MHz to 1800 MHz with a
+10 MHz instantaneous bandwidth.
+
+Gain is a linear scale 0–21 (not dB); the SoapyHydraSDR plugin maps this
+to the hardware's RF gain stages.
+
+Requires: rfone_host library, SoapySDR, SoapyHydraSDR module installed.
+Official: https://github.com/hydrasdr/SoapyHydraSDR
+"""
+
+from __future__ import annotations
+
+from utils.dependencies import get_tool_path
+
+from .base import CommandBuilder, SDRCapabilities, SDRDevice, SDRType
+
+
+class HydraSDRCommandBuilder(CommandBuilder):
+    """HydraSDR RFOne command builder using SoapySDR / SoapyHydraSDR."""
+
+    CAPABILITIES = SDRCapabilities(
+        sdr_type=SDRType.HYDRA_SDR,
+        freq_min_mhz=24.0,
+        freq_max_mhz=1800.0,
+        gain_min=0.0,
+        gain_max=21.0,  # linear scale; recommended starting point: 12
+        sample_rates=[2500000, 5000000, 10000000],
+        supports_bias_t=False,
+        supports_ppm=False,
+        tx_capable=False,
+        supports_iq_capture=True,
+    )
+
+    def _build_device_string(self, device: SDRDevice) -> str:
+        """Build SoapySDR device string for HydraSDR RFOne."""
+        if device.serial and device.serial not in ("N/A", "Unknown"):
+            return f"driver=hydrasdr,serial={device.serial}"
+        return "driver=hydrasdr"
+
+    def build_fm_demod_command(
+        self,
+        device: SDRDevice,
+        frequency_mhz: float,
+        sample_rate: int = 22050,
+        gain: float | None = None,
+        ppm: int | None = None,
+        modulation: str = "fm",
+        squelch: int | None = None,
+        bias_t: bool = False,
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        rx_fm_path = get_tool_path("rx_fm") or "rx_fm"
+        cmd = [
+            rx_fm_path,
+            "-d",
+            device_str,
+            "-f",
+            f"{frequency_mhz}M",
+            "-M",
+            modulation,
+            "-s",
+            str(sample_rate),
+        ]
+        if gain is not None and gain > 0:
+            cmd.extend(["-g", str(int(gain))])
+        if squelch is not None and squelch > 0:
+            cmd.extend(["-l", str(squelch)])
+        cmd.append("-")
+        return cmd
+
+    def build_adsb_command(self, device: SDRDevice, gain: float | None = None, bias_t: bool = False) -> list[str]:
+        # 1090 MHz is within the RFOne's range (24–1800 MHz)
+        device_str = self._build_device_string(device)
+        cmd = ["readsb", "--net", "--device-type", "soapysdr", "--device", device_str, "--quiet"]
+        if gain is not None:
+            cmd.extend(["--gain", str(int(gain))])
+        return cmd
+
+    def build_ism_command(
+        self,
+        device: SDRDevice,
+        frequency_mhz: float = 433.92,
+        gain: float | None = None,
+        ppm: int | None = None,
+        bias_t: bool = False,
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        cmd = ["rtl_433", "-d", device_str, "-f", f"{frequency_mhz}M", "-F", "json"]
+        if gain is not None and gain > 0:
+            cmd.extend(["-g", str(int(gain))])
+        return cmd
+
+    def build_ais_command(
+        self,
+        device: SDRDevice,
+        gain: float | None = None,
+        bias_t: bool = False,
+        tcp_port: int = 10110,
+        udp_host: str | None = None,
+        udp_port: int | None = None,
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        cmd = [
+            "AIS-catcher",
+            "-d",
+            f"soapysdr -d {device_str}",
+            "-S",
+            str(tcp_port),
+            "-o",
+            "5",
+            "-q",
+        ]
+        if gain is not None and gain > 0:
+            cmd.extend(["-gr", "tuner", str(int(gain))])
+        if udp_host and udp_port:
+            cmd.extend(["-u", udp_host, str(udp_port)])
+        return cmd
+
+    def build_iq_capture_command(
+        self,
+        device: SDRDevice,
+        frequency_mhz: float,
+        sample_rate: int = 2048000,
+        gain: float | None = None,
+        ppm: int | None = None,
+        bias_t: bool = False,
+        output_format: str = "cu8",
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        freq_hz = int(frequency_mhz * 1e6)
+        rx_sdr_path = get_tool_path("rx_sdr") or "rx_sdr"
+        cmd = [
+            rx_sdr_path,
+            "-d",
+            device_str,
+            "-f",
+            str(freq_hz),
+            "-s",
+            str(sample_rate),
+            "-F",
+            "CU8",
+        ]
+        if gain is not None and gain > 0:
+            cmd.extend(["-g", str(int(gain))])
+        cmd.append("-")
+        return cmd
+
+    def get_capabilities(self) -> SDRCapabilities:
+        return self.CAPABILITIES
+
+    @classmethod
+    def get_sdr_type(cls) -> SDRType:
+        return SDRType.HYDRA_SDR

utils/sdr/usrp.py

@@ -0,0 +1,153 @@
+"""
+USRP command builder implementation.
+
+Uses SoapySDR (via the UHD driver / SoapyUHD bridge) for all signal
+processing tasks.  The same rx_fm / rx_sdr / rtl_433 / AIS-catcher
+toolchain used by HackRF applies here because they all speak SoapySDR.
+
+Tested target: USRP N200 / B200 / B210 (UHD driver, SoapyUHD bridge).
+Requires: uhd, SoapySDR, SoapyUHD installed on the host or in Docker.
+"""
+
+from __future__ import annotations
+
+from utils.dependencies import get_tool_path
+
+from .base import CommandBuilder, SDRCapabilities, SDRDevice, SDRType
+
+
+class USRPCommandBuilder(CommandBuilder):
+    """USRP command builder using SoapySDR / UHD."""
+
+    CAPABILITIES = SDRCapabilities(
+        sdr_type=SDRType.USRP,
+        freq_min_mhz=1.0,
+        freq_max_mhz=6000.0,
+        gain_min=0.0,
+        gain_max=76.0,  # typical UHD normalised gain range
+        sample_rates=[1000000, 2000000, 4000000, 8000000, 16000000, 25000000],
+        supports_bias_t=False,
+        supports_ppm=False,
+        tx_capable=True,
+        supports_iq_capture=True,
+    )
+
+    def _build_device_string(self, device: SDRDevice) -> str:
+        """Build SoapySDR device string for USRP."""
+        if device.serial and device.serial not in ("N/A", "Unknown"):
+            return f"driver=uhd,serial={device.serial}"
+        return "driver=uhd"
+
+    def build_fm_demod_command(
+        self,
+        device: SDRDevice,
+        frequency_mhz: float,
+        sample_rate: int = 22050,
+        gain: float | None = None,
+        ppm: int | None = None,
+        modulation: str = "fm",
+        squelch: int | None = None,
+        bias_t: bool = False,
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        rx_fm_path = get_tool_path("rx_fm") or "rx_fm"
+        cmd = [
+            rx_fm_path,
+            "-d",
+            device_str,
+            "-f",
+            f"{frequency_mhz}M",
+            "-M",
+            modulation,
+            "-s",
+            str(sample_rate),
+        ]
+        if gain is not None and gain > 0:
+            cmd.extend(["-g", str(int(gain))])
+        if squelch is not None and squelch > 0:
+            cmd.extend(["-l", str(squelch)])
+        cmd.append("-")
+        return cmd
+
+    def build_adsb_command(self, device: SDRDevice, gain: float | None = None, bias_t: bool = False) -> list[str]:
+        device_str = self._build_device_string(device)
+        cmd = ["readsb", "--net", "--device-type", "soapysdr", "--device", device_str, "--quiet"]
+        if gain is not None:
+            cmd.extend(["--gain", str(int(gain))])
+        return cmd
+
+    def build_ism_command(
+        self,
+        device: SDRDevice,
+        frequency_mhz: float = 433.92,
+        gain: float | None = None,
+        ppm: int | None = None,
+        bias_t: bool = False,
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        cmd = ["rtl_433", "-d", device_str, "-f", f"{frequency_mhz}M", "-F", "json"]
+        if gain is not None and gain > 0:
+            cmd.extend(["-g", str(int(gain))])
+        return cmd
+
+    def build_ais_command(
+        self,
+        device: SDRDevice,
+        gain: float | None = None,
+        bias_t: bool = False,
+        tcp_port: int = 10110,
+        udp_host: str | None = None,
+        udp_port: int | None = None,
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        cmd = [
+            "AIS-catcher",
+            "-d",
+            f"soapysdr -d {device_str}",
+            "-S",
+            str(tcp_port),
+            "-o",
+            "5",
+            "-q",
+        ]
+        if gain is not None and gain > 0:
+            cmd.extend(["-gr", "tuner", str(int(gain))])
+        if udp_host and udp_port:
+            cmd.extend(["-u", udp_host, str(udp_port)])
+        return cmd
+
+    def build_iq_capture_command(
+        self,
+        device: SDRDevice,
+        frequency_mhz: float,
+        sample_rate: int = 2048000,
+        gain: float | None = None,
+        ppm: int | None = None,
+        bias_t: bool = False,
+        output_format: str = "cu8",
+    ) -> list[str]:
+        device_str = self._build_device_string(device)
+        freq_hz = int(frequency_mhz * 1e6)
+        rx_sdr_path = get_tool_path("rx_sdr") or "rx_sdr"
+        cmd = [
+            rx_sdr_path,
+            "-d",
+            device_str,
+            "-f",
+            str(freq_hz),
+            "-s",
+            str(sample_rate),
+            "-F",
+            "CU8",
+        ]
+        if gain is not None and gain > 0:
+            cmd.extend(["-g", str(int(gain))])
+        cmd.append("-")
+        return cmd
+
+    def get_capabilities(self) -> SDRCapabilities:
+        return self.CAPABILITIES
+
+    @classmethod
+    def get_sdr_type(cls) -> SDRType:
+        return SDRType.USRP