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v1.3.2: Fix HR variation jumping instead of smooth transitions

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Remove hard clamp that instantly snapped HR to ±3 of target, causing
jumps when target changed. Now uses rate-limited transitions (1 BPM
per tick at 0.5s intervals) for smooth ramping.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Matt Hills
2026-01-19 17:28:24 -05:00
parent 0d34cae441
commit 0a48a2928e
1 changed files with 11 additions and 9 deletions
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20
src/api/hr_variation.py
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@@ -113,14 +113,16 @@ class HRVariationManager:
# Calculate ideal HR
ideal_hr = state.target + sine_variation + random_walk
# Smooth transition (30% toward ideal each tick)
state.float_hr += (ideal_hr - state.float_hr) * 0.3
# Clamp to ±3 of target
state.float_hr = max(
state.target - 3,
min(state.target + 3, state.float_hr)
)
# Smooth transition toward ideal
# Use rate-limited step when far from target for smooth ramp
distance = abs(ideal_hr - state.float_hr)
if distance > 3:
# Far from target: move max 1 BPM per tick (2 BPM/sec at 0.5s ticks)
step = 1.0 if ideal_hr > state.float_hr else -1.0
state.float_hr += step
else:
# Close to target: use proportional smoothing
state.float_hr += (ideal_hr - state.float_hr) * 0.2
# Round for transmission
current_hr = round(max(30, min(220, state.float_hr)))
@@ -130,7 +132,7 @@ class HRVariationManager:
last_sent = current_hr
await self._send_hr(device_id, current_hr)
await asyncio.sleep(1)
await asyncio.sleep(0.5)
except asyncio.CancelledError:
pass