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Fix RF scanning and add status feedback

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- Remove requirement for sdr_device to be set before RF scanning
- Add RTL-SDR device detection check with rtl_test before scanning
- Lower signal detection threshold from -50dBm to -70dBm
- Lower noise floor threshold from 15dB to 10dB above noise
- Add rf_status event for frontend feedback when RF unavailable
- Show status message in RF panel explaining why scanning isn't working
- Add CSS styling for status messages
- Reset RF status message when sweep starts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Smittix
2026-01-14 15:35:47 +00:00
parent 236fbf061c
commit ff7c768287
2 changed files with 86 additions and 5 deletions
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43
routes/tscm.py
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@@ -1022,10 +1022,36 @@ def _scan_rf_signals(sdr_device: int | None, duration: int = 30) -> list[dict]:
rtl_power_path = shutil.which('rtl_power')
if not rtl_power_path:
logger.warning("rtl_power not found in PATH, RF scanning unavailable")
_emit_event('rf_status', {
'status': 'error',
'message': 'rtl_power not installed. Install rtl-sdr package for RF scanning.',
})
return signals
logger.info(f"Found rtl_power at: {rtl_power_path}")
# Test if RTL-SDR device is accessible
rtl_test_path = shutil.which('rtl_test')
if rtl_test_path:
try:
test_result = subprocess.run(
[rtl_test_path, '-t'],
capture_output=True,
text=True,
timeout=5
)
if 'No supported devices found' in test_result.stderr or test_result.returncode != 0:
logger.warning("No RTL-SDR device found")
_emit_event('rf_status', {
'status': 'error',
'message': 'No RTL-SDR device connected. Connect an RTL-SDR dongle for RF scanning.',
})
return signals
except subprocess.TimeoutExpired:
pass # Device might be busy, continue anyway
except Exception as e:
logger.debug(f"rtl_test check failed: {e}")
# Define frequency bands to scan (in Hz) - focus on common bug frequencies
# Format: (start_freq, end_freq, bin_size, description)
scan_bands = [
@@ -1089,12 +1115,12 @@ def _scan_rf_signals(sdr_device: int | None, duration: int = 30) -> list[dict]:
hz_step = float(parts[4])
db_values = [float(x) for x in parts[6:] if x.strip()]
# Find peaks above noise floor (typically -60 dBm is strong)
# Find peaks above noise floor
noise_floor = sum(db_values) / len(db_values) if db_values else -100
threshold = noise_floor + 15 # Signal must be 15dB above noise
threshold = noise_floor + 10 # Signal must be 10dB above noise
for idx, db in enumerate(db_values):
if db > threshold and db > -50: # Strong signal
if db > threshold and db > -70: # Detect signals above -70dBm
freq_hz = hz_low + (idx * hz_step)
freq_mhz = freq_hz / 1000000
@@ -1282,7 +1308,7 @@ def _run_sweep(
logger.error(f"Bluetooth scan error: {e}")
# Perform RF scan using SDR
if rf_enabled and sdr_device is not None and (current_time - last_rf_scan) >= rf_scan_interval:
if rf_enabled and (current_time - last_rf_scan) >= rf_scan_interval:
try:
_emit_event('sweep_progress', {
'progress': min(100, int(((current_time - start_time) / duration) * 100)),
@@ -1291,7 +1317,16 @@ def _run_sweep(
'bt_count': len(all_bt),
'rf_count': len(all_rf),
})
# Try RF scan even if sdr_device is None (will use device 0)
rf_signals = _scan_rf_signals(sdr_device)
# If no signals and this is first RF scan, send info event
if not rf_signals and last_rf_scan == 0:
_emit_event('rf_status', {
'status': 'no_signals',
'message': 'RF scan completed but no signals detected. Check RTL-SDR connection.',
})
for signal in rf_signals:
freq_key = f"{signal['frequency']:.3f}"
if freq_key not in [f"{s['frequency']:.3f}" for s in all_rf]: