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fix: ADS-B probe incorrectly treats "No devices found" as success

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The success check ('Found' in line and 'device' in line) matched
"No supported devices found" since both keywords appear. Add a
pre-check for negative device messages, a return code fallback,
and a clearer error message.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Smittix
2026-02-27 14:35:28 +00:00
parent 7683a925df
commit 54987e4c8d
1 changed files with 10 additions and 4 deletions
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14
utils/sdr/detection.py
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@@ -441,6 +441,11 @@ def probe_rtlsdr_device(device_index: int) -> str | None:
line = proc.stderr.readline()
if not line:
break # EOF — process closed stderr
# Check for no-device messages first (before success check,
# since "No supported devices found" also contains "Found" + "device")
if 'no supported devices' in line.lower() or 'no matching devices' in line.lower():
error_found = True
break
if 'usb_claim_interface' in line or 'Failed to open' in line:
error_found = True
break
@@ -449,6 +454,9 @@ def probe_rtlsdr_device(device_index: int) -> str | None:
break
if proc.poll() is not None:
break # Process exited
if proc.poll() is not None and proc.returncode != 0 and not error_found:
# rtl_test exited with error but we didn't match a specific keyword
error_found = True
finally:
try:
proc.kill()
@@ -462,10 +470,8 @@ def probe_rtlsdr_device(device_index: int) -> str | None:
f"device busy or unavailable"
)
return (
f'SDR device {device_index} is busy at the USB level — '
f'another process outside INTERCEPT may be using it. '
f'Check for stale rtl_fm/rtl_433/dump1090 processes, '
f'or try a different device.'
f'SDR device {device_index} is not available — '
f'check that the RTL-SDR is connected and not in use by another process.'
)
except Exception as e: