mirror of
https://github.com/smittix/intercept.git
synced 2026-04-25 07:10:00 -07:00
e01c651bb4
- Add GPS dongle support with NMEA parsing (utils/gps.py, routes/gps.py) - Add GPS device selector to ADS-B and Satellite observer location sections - Add GPS dongle option to ADS-B dashboard - Fix Python 3.7/3.8 compatibility by adding 'from __future__ import annotations' to all SDR module files (fixes TypeError: 'type' object is not subscriptable) - Add pyserial to requirements.txt - Update README with GPS dongle documentation and troubleshooting 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
124 lines
3.2 KiB
Python
124 lines
3.2 KiB
Python
"""
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RTL-SDR command builder implementation.
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Uses native rtl_* tools (rtl_fm, rtl_433) and dump1090 for maximum compatibility
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with existing RTL-SDR installations. No SoapySDR dependency required.
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"""
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from __future__ import annotations
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from typing import Optional
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from .base import CommandBuilder, SDRCapabilities, SDRDevice, SDRType
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class RTLSDRCommandBuilder(CommandBuilder):
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"""RTL-SDR command builder using native rtl_* tools."""
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CAPABILITIES = SDRCapabilities(
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sdr_type=SDRType.RTL_SDR,
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freq_min_mhz=24.0,
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freq_max_mhz=1766.0,
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gain_min=0.0,
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gain_max=49.6,
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sample_rates=[250000, 1024000, 1800000, 2048000, 2400000],
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supports_bias_t=True,
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supports_ppm=True,
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tx_capable=False
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)
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def build_fm_demod_command(
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self,
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device: SDRDevice,
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frequency_mhz: float,
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sample_rate: int = 22050,
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gain: Optional[float] = None,
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ppm: Optional[int] = None,
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modulation: str = "fm",
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squelch: Optional[int] = None
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) -> list[str]:
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"""
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Build rtl_fm command for FM demodulation.
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Used for pager decoding and iridium capture.
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"""
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cmd = [
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'rtl_fm',
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'-d', str(device.index),
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'-f', f'{frequency_mhz}M',
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'-M', modulation,
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'-s', str(sample_rate),
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]
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if gain is not None and gain > 0:
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cmd.extend(['-g', str(gain)])
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if ppm is not None and ppm != 0:
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cmd.extend(['-p', str(ppm)])
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if squelch is not None and squelch > 0:
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cmd.extend(['-l', str(squelch)])
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# Output to stdout for piping
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cmd.append('-')
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return cmd
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def build_adsb_command(
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self,
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device: SDRDevice,
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gain: Optional[float] = None
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) -> list[str]:
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"""
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Build dump1090 command for ADS-B decoding.
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Uses dump1090 with network output for SBS data streaming.
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"""
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cmd = [
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'dump1090',
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'--net',
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'--device-index', str(device.index),
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'--quiet'
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]
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if gain is not None:
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cmd.extend(['--gain', str(int(gain))])
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return cmd
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def build_ism_command(
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self,
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device: SDRDevice,
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frequency_mhz: float = 433.92,
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gain: Optional[float] = None,
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ppm: Optional[int] = None
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) -> list[str]:
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"""
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Build rtl_433 command for ISM band sensor decoding.
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Outputs JSON for easy parsing.
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"""
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cmd = [
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'rtl_433',
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'-d', str(device.index),
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'-f', f'{frequency_mhz}M',
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'-F', 'json'
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]
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if gain is not None and gain > 0:
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cmd.extend(['-g', str(int(gain))])
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if ppm is not None and ppm != 0:
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cmd.extend(['-p', str(ppm)])
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return cmd
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def get_capabilities(self) -> SDRCapabilities:
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"""Return RTL-SDR capabilities."""
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return self.CAPABILITIES
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@classmethod
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def get_sdr_type(cls) -> SDRType:
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"""Return SDR type."""
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return SDRType.RTL_SDR
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