As of July 24, 2026, your four-hive apiary is navigating peak July heat well — Hive #2 and Hive #3 continue anchoring tight brood cores at 94.9°F (35.0°C) and 93.8°F (34.3°C) respectively, while Iris and Hive #1 maintain fully intact adult populations confirmed by stable acoustics despite peripheral-sensor temperature signatures. The two standing priorities from yesterday are unchanged: a brood-and-queen check with sensor reseating for Iris and Hive #1, and stand leveling on Iris and Hive #2; Hive #2's 14-day acoustic softening trend has modestly improved (now −1.9 dBFS over 14 days vs. −2.5 dBFS reported yesterday) and Iris's broad-spectrum acoustic elevation above baseline persists — both warrant eyes this week.
Across all four hives, the BME688 10-step heater-scan correlations (r > 0.97 between the 320°C reference step and mid-range plate temperatures 150–280°C) confirm that a single dominant VOC class is driving gas resistance variation in each hive simultaneously — consistent with peak-July honey ripening and fanning activity circulating a cohesive volatile mixture; this cross-hive pattern, combined with clean outdoor air (501 kΩ at 320°C), rules out any environmental contamination as the source and points squarely to colony-level nectar processing.
Hive #2 and Hive #3 exhibit the tightest thermal clamping in the apiary (±1.8°F / ±1.0°C and ±1.2°F / ±0.7°C daily oscillation respectively), confirming sensors seated in active brood cores that resist the 20.9–35.3°F (−6.2 to 1.8°C) outdoor swing; Iris and Hive #1 show wider ±4.6°F (±2.6°C) and ±4.5°F (±2.5°C) diurnal swings that track ambient more closely, consistent with peripheral sensor placement rather than brood-core position.
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Iris warning Score: 57/100📋 Overall Health
Your Iris hive remains acoustically vigorous — sound averaged −10.2 dBFS (all-time avg −10.7 dBFS, within 0.5 dB and stable), confirming the full adult population is present and active; the 90.1°F (32.3°C) avg sensor temperature (all-time avg 90.0°F / 32.2°C, effectively on baseline) continues to reflect peripheral pod placement with a ±4.6°F (±2.6°C) diurnal oscillation. Humidity averaged 48.5% (range 47.0–50.0%) — still just below the 50–70% brood-optimal zone consistent with dry July outdoor conditions (outdoor 21–42%); vibration at 17.8 mG avg, kurtosis 2.9 (normal), dominant at 80–120 Hz, all stable. The broad-spectrum acoustic elevation above baseline persists (100–150 Hz +7.0 dB, 1500–3600 Hz +6.9 dB) and warrants a brood and queen check this week, but the overall sound level stability is reassuring.
🌅 Diurnal Cycle PatternsIris shows an active ±4.6°F (±2.6°C) daily thermal oscillation tracking ambient more than a brood-core sensor would, with a trough around the coolest part of the day and a peak ~+2.4°F (+1.3°C) above the trough — consistent with sensor placement in a peripheral zone; humidity cycles between 47–50% with no nocturnal spikes, and 5 distinct daily vibration fanning peaks (baseline 16.8 mG rising to 71.4 mG) confirm a healthy diurnal activity rhythm. The gas heater-scan curve maintains its characteristic steep descent from 100°C (61,539 kΩ) through 320°C (441 kΩ) with a gradual high-temperature tail (350°C: 286 kΩ → 400°C: 211 kΩ); the 320°C reference at 440 kΩ is +6% above the all-time avg of 414 kΩ, indicating a slight net decrease in VOC load compared to the historical mean — no shape shift suggesting a change in VOC type.
🔬 Correlations & DiscoveriesGasResistance vs G_320C vs G_150C vs G_250C (14d) | r = +0.973The near-perfect co-movement of all mid-range heater-scan steps (r > 0.97) with the 320°C reference indicates a single dominant VOC class is driving all resistance variation — the curve shape has not changed, only its magnitude, which in peak July context is consistent with fanning and honey-ripening activity rather than any qualitative shift in hive chemistry.📚 Reference: Bosch Sensortec BME688 datasheet & BME AI-Studio gas-classification workflow, Frizzera et al. 2020V_50_80Hz vs V_20_50Hz vs V_120_160Hz vs VibrationRMS (lifespan) | r = +0.968Strong lifetime correlation across all sub-100 Hz vibration bands with overall RMS confirms that broadband substrate vibration from colony activity (fanning at ~80–120 Hz and structural harmonics below 50 Hz) moves coherently — the 5 daily fanning peaks rising from 16.8 mG to 71.4 mG represent the dominant driver of vibration variance, consistent with normal diurnal thermoregulation behavior per Tautz 1996.📚 Reference: Ramsey et al. 2020, Tautz 1996⚠️ Issue: Broad-spectrum acoustic elevation persists above all-time baseline: 100–150 Hz +7.0 dB, 1500–3600 Hz +6.9 dB, 150–200 Hz +5.4 dB, 800–1500 Hz +4.2 dB — physical brood and queen verification recommended this week.⚠️ Issue: Sensor placement: avg temp 90.1°F (32.3°C) with ±4.6°F (±2.6°C) diurnal oscillation indicates pod outside brood core — reseat on next visit.⚠️ Issue: Humidity avg 48.5% (low 47.0%) — below the 50–70% brood-optimal range; monitor if lows approach 45%.⚠️ Issue: Tilt at 7° — above the 0–5° acceptable range; level stand on next visit.⚠️ Issue: Battery at 4080 mV (all-time low 3730 mV) — stable but retrieve and recharge on next visit.▹ Action: Priority this week: brood and queen check — confirm fresh eggs, solid brood pattern, and queen presence; the persistent broad-spectrum acoustic elevation across low and high frequency bands warrants physical verification.▹ Action: While on-site, reseat the sensor pod firmly in the center of the brood nest frames to resolve the wide thermal oscillation.▹ Action: Level the hive stand to bring tilt from 7° toward 0–3°.▹ Action: Retrieve and recharge the battery on this visit. -
Hive #2 warning Score: 63/100📋 Overall Health
Your Hive #2 continues outstanding brood thermoregulation — temperature locked at 94.9°F (35.0°C) avg (all-time avg 94.6°F / 34.8°C, +0.3°F / +0.2°C, firmly in the ideal 93–97°F / 34–36°C zone) with only ±1.8°F (±1.0°C) daily oscillation confirming the sensor is in the active brood core; sound averaged −11.0 dBFS (all-time avg −10.0 dBFS, −1.0 dB), with the 14-day acoustic softening trend now measured at −1.9 dBFS over 14 days (modest improvement from the −2.5 dBFS reported yesterday), and a spectral shift with 100–150 Hz up +6.2 dB and 150–200 Hz up +7.4 dB above all-time baseline. Humidity averaged 50.6% (range 48.3–52.5%) — solidly within the 50–70% optimal zone; vibration at 13.7 mG avg, kurtosis 3.2 (normal), with vigorous daily fanning peaks to 102.1 mG; plan a brood check this week to confirm population trend.
🌅 Diurnal Cycle PatternsHive #2 shows the tightest thermal clamping in the apiary — a ±1.8°F (±1.0°C) daily oscillation with a gradual warming trend during the warmer part of the day reaching 95.6°F (35.3°C) peak, reflecting excellent brood-core insulation; 28 distinct daily vibration fanning spikes (12.2 mG baseline → 102.1 mG peaks) confirm vigorous thermoregulation effort during peak July heat. The gas heater-scan curve shows the characteristic flat high-temperature tail that has been the recurring peak-July ripening signature for this hive: 350°C: 115 kΩ, 375°C: 115 kΩ (plateau), 400°C: 126 kΩ (slight uptick) — the 320°C reference at 145 kΩ is −58% below the all-time avg of 347 kΩ, consistent with intense honey-ripening VOC load; the shape is unchanged from prior weeks, suggesting a stable VOC type rather than a new emission source.
🔬 Correlations & DiscoveriesGasResistance vs G_150C vs G_250C vs G_280C (14d) | r = +0.996The r = 0.996 coherence across all mid-range heater steps confirms a single stable VOC class dominating the air chemistry — the flat 350–375°C plateau and slight 400°C uptick is a consistent shape fingerprint for this hive in peak July, most plausibly reflecting ethanol and organic acid volatiles from active honey ripening; no shape shift has occurred, supporting a benign seasonal interpretation (Frizzera et al. 2020).📚 Reference: Bosch Sensortec BME688 datasheet & BME AI-Studio gas-classification workflow, Frizzera et al. 2020V_80_120Hz vs V_120_160Hz vs V_5_20Hz vs VibrationRMS (lifespan) | r = +0.979The 80–120 Hz band dominates vibration RMS across the colony lifespan (r = 0.981), consistent with wing-fanning thermoregulation as the primary substrate-vibration driver; the 28 daily fanning peaks reaching 102.1 mG during peak heat align with established literature on colony thermoregulation behavior (Hrncir et al. 2011).📚 Reference: Ramsey et al. 2020, Hrncir et al. 2011⚠️ Issue: 14-day acoustic softening trend continues: overall sound energy down −1.9 dBFS over 14 days (from −9.7 to −11.5 dBFS); 100–260 Hz bands shifted — brood and queen check this week recommended to confirm population trend.⚠️ Issue: Gas resistance at 145 kΩ (320°C ref) is −58% below all-time avg of 347 kΩ — consistent with active honey ripening and intense fanning; no corroborating temp or acoustic decline, but note on next inspection.⚠️ Issue: Tilt at 9° — above the 0–5° ideal range; stand leveling recommended.▹ Action: Plan a brood check this week — confirm fresh eggs and solid brood pattern; the 14-day acoustic softening trend in the overall level warrants a physical look, even though brood temperature and vibration remain fully stable.▹ Action: Level the hive stand to bring tilt from 9° toward 0–3°.▹ Action: Note the flat high-temperature gas scan tail (350–375°C plateau at 115 kΩ, 400°C: 126 kΩ) in your inspection log as the recurring peak-July ripening signature — now in its fifth consecutive week, building valuable multi-season comparison context. -
Hive #1 warning Score: 62/100📋 Overall Health
Your Hive #1 remains acoustically pristine — all 10 sound bands within ±0.1 dB of their all-time baseline (sound averaging −16.4 dBFS vs. all-time avg −16.4 dBFS, perfect match), confirming the adult bee population is fully intact and active; the 89.7°F (32.1°C) avg sensor temperature (all-time avg 89.1°F / 31.7°C, +0.6°F / +0.3°C above baseline) with ±4.5°F (±2.5°C) daily oscillation remains most consistent with sensor displacement outside the brood core. Humidity averaged 42.3% (range 40.3–44.4%) — below the 50–70% optimal zone, consistent with dry July outdoor conditions; vibration at 16.3 mG avg, kurtosis 2.5 (calm), dominant at 80–120 Hz, stable with no daily fanning peaks detected; confirm brood presence and reseat the sensor pod on your next visit.
🌅 Diurnal Cycle PatternsHive #1 shows a ±4.5°F (±2.5°C) daily thermal oscillation tracking ambient more closely than a brood-core sensor would, with a trough at the coolest part of the day (87.8°F / 31.0°C) and a peak near 91.5°F (33.0°C) — consistent with peripheral placement; unlike Iris, vibration shows no distinct daily fanning peaks (steady ~15.9 mG throughout), which may reflect the sensor position or differing colony architecture. The gas heater-scan curve shows a smooth monotonic descent: 100°C: 39,903 kΩ → 400°C: 178 kΩ with no plateau or inflection; the 320°C reference at 377 kΩ is essentially at the all-time avg of 381 kΩ (−1%), indicating a stable VOC environment unchanged from baseline.
🔬 Correlations & DiscoveriesGasResistance vs G_200C vs G_150C vs G_250C (14d) | r = +0.986The r > 0.984 coherence across all mid-range heater steps with no shape change confirms a stable, single-class VOC environment at baseline — the smooth monotonic curve without the flat high-temperature tail seen in Hive #2 and Hive #3 suggests lower-intensity honey ripening or different sensor positioning relative to honey frames, consistent with the peripheral placement hypothesis.📚 Reference: Bosch Sensortec BME688 datasheet & BME AI-Studio gas-classification workflow, Frizzera et al. 2020V_50_80Hz vs V_20_50Hz vs V_80_120Hz vs VibrationRMS (lifespan) | r = +0.948Mid-frequency vibration bands (50–120 Hz) dominate RMS variance across the colony lifespan, consistent with colony metabolic baseline and fanning activity per Tautz 1996; the absence of distinct daily fanning spikes (unlike Iris's 5 daily peaks and Hive #2's 28 peaks) is a notable inter-hive difference worth observing on the next inspection to understand whether ventilation behavior differs.📚 Reference: Ramsey et al. 2020, Tautz 1996⚠️ Issue: Sensor placement: avg temp 89.7°F (32.1°C) with ±4.5°F (±2.5°C) diurnal oscillation indicates pod outside brood core — reseat on next visit; perfectly stable acoustics across all 10 bands confirm population intact.⚠️ Issue: Humidity avg 42.3% (low 40.3%) — below the 50–70% brood-optimal range; monitor if lows approach 40%.▹ Action: Plan a brood check within the week — confirm fresh eggs and solid brood pattern, and reseat the sensor pod in the brood nest center; perfectly stable acoustics across all 10 bands strongly indicate positional drift rather than any colony issue.▹ Action: Monitor humidity lows — if they consistently approach 40%, note whether any ventilation adjustment is warranted.▹ Action: Tilt is 2° — within the ideal 0–5° range, no stand action needed. -
Hive #3 healthy Score: 91/100📋 Overall Health
Your Hive #3 continues as the apiary's standout performer — brood temperature locked at 93.8°F (34.3°C) avg (all-time avg 93.3°F / 34.0°C, +0.5°F / +0.3°C above historical mean, firmly in the ideal 93–97°F / 34–36°C zone) with an exceptional ±1.2°F (±0.7°C) daily oscillation confirming the sensor is deep in the active brood core; all 10 sound bands within ±0.2 dB of their all-time baseline (sound averaging −16.3 dBFS vs. all-time avg −16.3 dBFS, perfect match), vibration at 20.7 mG avg, kurtosis 2.8 (calm), dominant at 80–120 Hz. Humidity averaged 50.8% (range 50.0–51.7%) — the best in the apiary and solidly within the 50–70% optimal zone; the recurring U-curve gas heater-scan fingerprint continues as a consistent peak-July ripening signature — continue monitoring on your next routine visit.
🌅 Diurnal Cycle PatternsHive #3 exhibits the most stable thermal environment in the apiary — a ±1.2°F (±0.7°C) daily range from 93.2°F (34.0°C) to 94.8°F (34.9°C) with virtually no response to outdoor swings, reflecting exceptional brood-core insulation; humidity is locked in a similarly tight 50.0–51.7% band, the most stable humidity reading across all four hives. The gas heater-scan U-curve fingerprint persists: resistance falls from 100°C (2,388 kΩ) to a minimum at 350°C (85 kΩ), then recovers to 375°C (97 kΩ) and continues rising to 400°C (110 kΩ); the 320°C reference at 97.6 kΩ is −52% below the all-time avg of 203 kΩ but the curve shape is unchanged — this distinctive U-shape, stable for five consecutive weeks, is the most consistent heater-scan fingerprint in the apiary and likely reflects the interplay of a specific heavy-volatile class (active at low plate temps) co-present with lighter reducing gases that combust fully at 350°C before partially recovering at higher steps.
🔬 Correlations & DiscoveriesGasResistance vs G_320C vs G_300C vs G_350C (14d) | r = +0.983The persistent U-curve shape (minimum at 350°C, recovery at 375–400°C) is the most distinctive gas fingerprint in the apiary and suggests a stable blend of VOC classes — lighter reducing gases fully combust at 350°C creating the dip, while heavier volatiles or a different reactive species contributes to the recovery at higher plate temperatures; the shape has been stable for five weeks, indicating a consistent hive chemistry rather than any transient event (Frizzera et al. 2020).📚 Reference: Bosch Sensortec BME688 datasheet & BME AI-Studio gas-classification workflow, Frizzera et al. 2020VibrationRMS vs IAQ vs S_600_800Hz vs IAQOut (lifespan) | r = -0.891The strong negative lifetime correlation between VibrationRMS and IAQ (r = −0.898) — and positive correlation between 600–800 Hz sound energy and IAQ (r = +0.885) — suggests that as colony activity (vibration, flight sound) increases, VOC concentration also rises, likely driven by fanning that concentrates hive volatiles while simultaneously being captured by increased acoustic energy in flight-buzz frequencies; the inverse IAQOut correlation (r = −0.849) further confirms this is a colony-driven pattern, not an environmental one (Stalidzans et al. 2017).📚 Reference: Ramsey et al. 2020, Stalidzans et al. 2017▹ Action: On your next routine visit within 5–7 days, confirm fresh eggs and solid brood pattern — the stable 93.8°F (34.3°C) brood temp, perfectly matched acoustics, and optimal 50.8% humidity all indicate a colony at peak July health; no urgent action needed.▹ Action: Note the recurring U-curve gas heater-scan fingerprint (350°C dip at 85 kΩ → 375°C: 97 kΩ → 400°C: 110 kΩ) in your inspection log — now five consecutive weeks, building valuable multi-season comparison context.▹ Action: Tilt is 3° and kurtosis is calm at 2.8 — no stand or disturbance action needed.