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morse: fix stop restart loop and lower SNR threshold for decoding

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Guard checkStatus() against in-flight stop to prevent status poller
from overriding stopping state and reconnecting SSE. Lower SNR floor
from 1.3 to 1.15 to accommodate weaker CW signals. Add SNR/noise_ref
to scope events and metrics for real-time threshold debugging.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Smittix
2026-02-26 21:57:08 +00:00
parent 97b10b3ac9
commit c0fb22124b
2 changed files with 31 additions and 3 deletions
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16
utils/morse.py
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@@ -236,6 +236,9 @@ class MorseDecoder:
def get_metrics(self) -> dict[str, float | bool]:
"""Return latest decoder metrics for UI/status messages."""
snr_mult = max(1.15, self.threshold_multiplier * 0.5)
snr_on = snr_mult * (1.0 + self._hysteresis)
snr_off = snr_mult * (1.0 - self._hysteresis)
return {
'wpm': float(self._estimated_wpm),
'tone_freq': float(self._active_tone_freq),
@@ -244,6 +247,10 @@ class MorseDecoder:
'threshold': float(self._threshold),
'tone_on': bool(self._tone_on),
'dit_ms': float((self._effective_dit_blocks() * self._block_duration) * 1000.0),
'snr': float(self._last_level / max(self._noise_floor, 1e-6)),
'noise_ref': float(self._noise_floor),
'snr_on': float(snr_on),
'snr_off': float(snr_off),
}
def _rebuild_detectors(self) -> None:
@@ -457,7 +464,7 @@ class MorseDecoder:
# gain-invariant — fixes stuck-ON tone when AGC amplifies
# inter-element silence above the raw magnitude threshold.
snr = level / max(noise_ref, 1e-6)
snr_mult = max(1.3, self.threshold_multiplier * 0.55)
snr_mult = max(1.15, self.threshold_multiplier * 0.5)
snr_on = snr_mult * (1.0 + self._hysteresis)
snr_off = snr_mult * (1.0 - self._hysteresis)
@@ -541,6 +548,9 @@ class MorseDecoder:
self._silence_blocks += 1.0
if amplitudes:
snr_mult = max(1.15, self.threshold_multiplier * 0.5)
snr_on = snr_mult * (1.0 + self._hysteresis)
snr_off = snr_mult * (1.0 - self._hysteresis)
events.append({
'type': 'scope',
'amplitudes': amplitudes,
@@ -551,6 +561,10 @@ class MorseDecoder:
'noise_floor': self._noise_floor,
'wpm': round(self._estimated_wpm, 1),
'dit_ms': round(self._effective_dit_blocks() * self._block_duration * 1000.0, 1),
'snr': round(self._last_level / max(self._noise_floor, 1e-6), 2),
'noise_ref': round(self._noise_floor, 4),
'snr_on': round(snr_on, 2),
'snr_off': round(snr_off, 2),
})
return events