As of July 20, 2026, your four-hive apiary is holding steady through peak July heat — Hive #2 and Hive #3 continue anchoring confirmed brood cores at 94.8°F (34.9°C) and 94.0°F (34.4°C) respectively, while Iris and Hive #1 maintain fully intact acoustics confirming complete adult populations despite their peripheral-sensor temperature signatures. The outstanding priority this week remains the same: a physical brood-and-queen check for all four hives, sensor reseating in Iris and Hive #1, and stand leveling on Iris and Hive #2.
A striking gas-environment contrast is visible across the apiary today: the outdoor hub reads a very clean 394 kΩ at 320°C (excellent air quality), while Hive #3's gas scan sits at just 93 kΩ — roughly 4× lower — confirming the VOC load is colony-internal (honey ripening, fanning, brood pheromones) rather than environmental, per Bosch BME688 datasheet and Frizzera et al. 2020. Hive #2's broad-spectrum acoustic elevation (+6 to +8.4 dB above baseline across low and high bands) co-occurring with its tight 94.8°F (34.9°C) brood-core lock and vigorous fanning peaks to 102 mG is a textbook multi-sensor signature of a large, highly active mid-summer colony (Ramsey et al. 2020).
Outdoor conditions deliver a robust 30.8°F (17.1°C) diurnal swing (64.6–95.4°F / 18.1–35.2°C) with humidity inversely tracking temperature (11–44%) and pressure stable at −1 Pa; Hive #2 and Hive #3 continue exemplary brood-core thermoregulation (≤3.2°F / 1.8°C oscillations) while Iris and Hive #1 show wider 5.4°F (3.0°C) and 5.6°F (3.1°C) daily swings consistent with peripheral pod placement loosely coupled to ambient air.
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Iris warning Score: 55/100📋 Overall Health
Your Iris hive remains acoustically vigorous — sound averaged −11.0 dBFS (all-time avg −10.4 dBFS, within 0.6 dB, stable over 14 days), confirming the full adult population is present and active; the 89.8°F (32.1°C) avg sensor temperature (all-time avg 89.6°F / 32.0°C, essentially on baseline, +0.2°F / +0.1°C) continues to reflect peripheral pod placement, as a true population loss would suppress sound significantly. Humidity averaged 47.7% (range 45.9–49.2%), holding just below the 50–70% brood-optimal zone but outdoor-driven given the dry July conditions; vibration is steady at 17.9 mG avg, kurtosis 2.9 (normal), dominant at 80–120 Hz — the priority remains a brood-and-queen check with sensor reseating and stand leveling this week.
🌅 Diurnal Cycle PatternsIris shows an active 8.1°F (4.5°C) daily temperature oscillation — wider than the <5.4°F (<3°C) seen in confirmed brood-core sensors — with a clear warming arc over the last 12 hours (+3.3°F / +1.8°C), consistent with ambient-coupled peripheral placement; sound tracks a gentle second-half-of-day uptick (−11.4 → −10.5 dBFS) suggesting increased afternoon colony activity. The gas heater-scan at 418 kΩ (320°C ref) is slightly above this hive's all-time avg of 408 kΩ — the curve shape is unremarkable, with a smooth monotonic decline from 100°C to 400°C, indicating a stable VOC environment; vibration daily fanning peaks reach 71.4 mG (4 distinct spikes over 14 days), a normal diurnal activity schedule.
🔬 Correlations & DiscoveriesGasResistance vs G_320C vs G_250C (14d) | r = +0.981The near-perfect co-movement of all mid-range heater-scan steps (r > 0.98) confirms the MOX plate is responding to a single, coherent VOC mixture that shifts uniformly across temperatures — consistent with a stable, colony-generated aromatic environment (propolis, brood pheromones) rather than a sharp intrusion of a single reactive gas. The curve's smooth shape and magnitude near the all-time baseline rules out a significant acute VOC event (Bosch BME AI-Studio gas-classification workflow).📚 Reference: Bosch Sensortec BME688 datasheet, Sensors & Actuators B literature⚠️ Issue: Broad-spectrum acoustic elevation persists: 100–150 Hz +5.8 dB, 1500–3600 Hz +5.6 dB, 800–1500 Hz +3.8 dB, 150–200 Hz +4.4 dB above all-time baseline — physical brood and queen verification recommended this week.⚠️ Issue: Sensor placement: avg temp 89.8°F (32.1°C) with 8.1°F (4.5°C) diurnal oscillation — reseat pod in brood core on next visit.⚠️ Issue: Humidity avg 47.7% — below the 50–70% brood-optimal range; outdoor-driven, monitor for further drops.⚠️ Issue: Tilt at 5° — at the upper edge of the 0–5° acceptable range; level stand on next visit.⚠️ Issue: Battery at 4076 mV (all-time low 3730 mV) — trajectory 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; persistent broad-spectrum acoustic elevation warrants physical verification.▹ Action: While on-site, reseat the sensor pod firmly in the center of the brood nest frames to resolve the temperature oscillation gap.▹ Action: Level the hive stand to bring tilt from 5° toward 0–3°.▹ Action: Retrieve and recharge the battery on this visit. -
Hive #2 warning Score: 62/100📋 Overall Health
Your Hive #2 continues outstanding brood thermoregulation — temperature locked at 94.8°F (34.9°C) avg (all-time avg 94.6°F / 34.8°C, +0.2°F / +0.1°C, exactly on baseline) with only a 1.9°F (1.0°C) daily oscillation confirming the sensor is firmly in the active brood core; sound averaged −10.7 dBFS (all-time avg −9.8 dBFS, within 0.9 dB), vibration at 13.7 mG avg, kurtosis 2.6 (smooth), dominant at 80–120 Hz, with vigorous fanning peaks to 102 mG confirming peak July activity. Humidity averaged 51.4% (range 47.7–56.7%) — solidly within the 50–70% optimal zone; the 14-day acoustic falling trend (−2.7 dBFS) and spectral shift away from low bands (100–260 Hz down −5.2 dB) are worth verifying on a brood check this week, though temperature and vibration remain fully stable.
🌅 Diurnal Cycle PatternsHive #2 shows a tight 3.2°F (1.8°C) daily temperature oscillation — exemplary brood-core thermoregulation against a 30.8°F (17.1°C) outdoor swing; sound is rock-steady first-to-second-half (−10.6 → −10.8 dBFS) with low-band energy (100–200 Hz) trending slightly down in the second half (−1.1 to −1.5 dB), consistent with reduced daytime fanning noise as ambient cools. The gas heater-scan at 238 kΩ (320°C ref) is −40% below the all-time avg of 393 kΩ; the curve is notably flat from 350–400°C (163 kΩ at both steps), a shape consistent with active honey ripening or fanning circulating hive volatiles — no corroborating temperature or acoustic decline so this is benign seasonal context. Daily vibration fanning peaks reach 102 mG over 24 distinct spikes in 14 days, the highest in the apiary.
🔬 Correlations & DiscoveriesV_80_120Hz vs V_120_160Hz vs VibrationRMS (lifespan) | r = +0.98The dominant vibration energy at 80–120 Hz (fanning frequency ~100 Hz) drives the total RMS with r > 0.98, confirming Hive #2's vibration signature is overwhelmingly shaped by active fanning and ventilation behavior rather than disturbance events; kurtosis of 2.6 (normal ~3.0) rules out impulsive impact events and confirms smooth, periodic colony activity consistent with peak summer thermoregulation (Tautz 1996).📚 Reference: Ramsey et al. 2020, Tautz 1996, Hrncir et al. 2011⚠️ Issue: Broad-spectrum acoustic elevation persists: 100–150 Hz +6.0 dB, 150–200 Hz +8.4 dB, 200–260 Hz +5.0 dB, 1500–3600 Hz +7.3 dB above all-time baseline — brood and queen check this week recommended.⚠️ Issue: 14-day acoustic falling trend: overall sound energy down −2.7 dBFS (from −9.0 to −11.7 dBFS) with spectral energy in 100–260 Hz band down −5.2 dB — worth confirming brood pattern and population on next visit.⚠️ Issue: Gas resistance at 238 kΩ is −40% below all-time avg of 393 kΩ — consistent with active honey ripening and fanning; note on next inspection for context (no corroborating temp or acoustic decline).⚠️ Issue: Tilt at 9° — above the 0–5° ideal range; stand leveling recommended.▹ Action: On your next visit this week, confirm fresh eggs and solid brood pattern — the 14-day acoustic softening trend combined with spectral shift away from low bands warrants a physical look, even though temperature and vibration remain fully stable.▹ Action: Level the hive stand to bring tilt from 9° toward 0–3°.▹ Action: Note the gas heater-scan flat high-temperature tail (350–400°C at 163 kΩ each) in your inspection log as a peak-July ripening signature — recording it will build valuable seasonal comparison context. -
Hive #1 warning Score: 60/100📋 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 88.3°F (31.3°C) avg sensor temperature (all-time avg 89.3°F / 31.8°C, −1.0°F / −0.6°C below baseline; weekly trend 90.3→90.0→89.6→86.7°F / 32.4→32.2→32.0→30.4°C showing a continuing gradual drift) is most consistent with sensor displacement outside the brood core since a population loss of any significance would suppress sound. Humidity averaged 43.6% (range 42.4–45.0%), below the 50–70% optimal zone and consistent with dry July outdoor conditions; vibration is steady at 16.5 mG avg, kurtosis 2.6 (smooth), dominant at 80–120 Hz — confirm brood presence and reseat the sensor pod on your next visit.
🌅 Diurnal Cycle PatternsHive #1 shows an 8.4°F (4.7°C) daily temperature oscillation — wider than confirmed brood-core sensors — with a clear warming arc over the last 12 hours (+4.6°F / +2.5°C), reinforcing ambient-coupled peripheral placement; sound is perfectly flat first-to-second-half (−16.3 → −16.4 dBFS) with all 10 spectral bands matching their historical norms to within 0.1 dB. The gas heater-scan at 367 kΩ (320°C ref) is near the all-time avg of 374 kΩ (−2%), with a smooth monotonic curve — no shape anomaly detected; vibration shows no cyclic daily fanning peaks (steady ~15.8 mG), which is a mild contrast to Hive #2's vigorous fanning spikes and worth noting on inspection.
🔬 Correlations & DiscoveriesGasResistance vs G_150C vs G_200C vs G_280C (14d) | r = +0.987Extremely high co-movement (r > 0.986) across low-to-mid heater-scan steps confirms the VOC environment inside Hive #1 is dominated by a single stable mixture that responds uniformly across plate temperatures — consistent with a low-activity but chemically stable hive interior; the near-baseline gas resistance level combined with perfect acoustic stability supports sensor displacement (peripheral position) as the explanation for the temperature drift rather than any change in colony chemistry (Bosch BME AI-Studio).📚 Reference: Bosch Sensortec BME688 datasheet, Sensors & Actuators B literature⚠️ Issue: 14-day temperature cooling drift continues (weekly avg: 90.3→90.0→89.6→86.7°F / 32.4→32.2→32.0→30.4°C; current avg 88.3°F / 31.3°C, −1.0°F / −0.6°C below all-time avg) — acoustics perfectly stable across all 10 bands confirms population intact; sensor displacement remains the most likely explanation; confirm brood presence and reseat pod on next visit.⚠️ Issue: Humidity avg 43.6% (low 42.4%) — below the 50–70% brood-optimal range; monitor if lows approach 42%.⚠️ Issue: No cyclic daily vibration fanning peaks detected (steady ~15.8 mG vs. vigorous peaks in Hive #2) — worth noting on inspection.▹ 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 afternoon humidity lows — if they consistently approach 42%, note whether any ventilation adjustment is warranted.▹ Action: Tilt is at 5° (same as yesterday) — within acceptable range; no urgent stand action needed but check seating while reseating the sensor. -
Hive #3 healthy Score: 88/100📋 Overall Health
Your Hive #3 continues as the apiary's standout performer — brood temperature locked at 94.0°F (34.4°C) avg (all-time avg 92.7°F / 33.7°C, +1.3°F / +0.7°C above historical mean, firmly in the ideal 93–97°F / 34–36°C zone, and the 14-day warming trend of +2.4°F / +1.3°C is a healthy seasonal trajectory) with only a 1.5°F (0.8°C) daily oscillation; all 10 sound bands within ±0.1 dB of their all-time baseline (sound averaging −16.4 dBFS, exactly matching the all-time avg −16.3 dBFS), vibration at 21.1 mG avg, kurtosis 2.8 (calm), dominant at 80–120 Hz. Humidity averaged 51.6% (range 50.1–52.5%) — the best in the apiary and solidly within the 50–70% optimal zone; gas resistance at 93 kΩ remains low and consistent with peak July honey ripening and active fanning — continue monitoring on your next routine visit.
🌅 Diurnal Cycle PatternsHive #3 shows an exemplary 1.5°F (0.8°C) daily temperature oscillation against a 30.8°F (17.1°C) outdoor swing — the tightest thermoregulation in the apiary; sound is perfectly flat first-to-second-half (−16.4 → −16.4 dBFS) with the 14-day acoustic trend stable and all spectral bins matching baseline. The gas heater-scan displays its distinctive U-curve shape: resistance drops to a minimum at 350°C (85 kΩ) then rises at 375°C (93 kΩ) and 400°C (110 kΩ) — the high-temperature steps rising above the 320°C reference is a repeating seasonal signature for this hive consistent with peak July ripening volatiles; vibration shows no large cyclic daily fanning peaks (steady ~19.4 mG), with the 120–160 Hz band at −9.2 dB slightly elevated vs. all-time avg of −9.4 dB — negligible deviation.
🔬 Correlations & DiscoveriesVibrationRMS vs IAQ vs S_600_800Hz (lifespan) | r = -0.898The strong negative correlation between VibrationRMS and IAQ (r = −0.898) — when colony mechanical activity rises, the gas sensor sees lower VOC load — is consistent with increased fanning ventilating the hive interior and diluting accumulated volatiles; the paired positive correlation of 600–800 Hz audio energy with IAQ (r = +0.897) suggests that periods of lower colony acoustic activity (less fanning, less flight noise) allow VOCs to concentrate, a multi-sensor relationship grounded in Seeley 1974's CO2/ventilation work and consistent with Frizzera et al. 2020's VOC dynamics.📚 Reference: Ramsey et al. 2020, Frizzera et al. 2020, Seeley 1974▹ Action: On your next routine visit within 5–7 days, confirm fresh eggs and solid brood pattern — the stable 94.0°F (34.4°C) brood temp, perfectly stable acoustics, and optimal 51.6% humidity all indicate a colony at peak July health; no urgent action needed.▹ Action: Note the distinctive U-curve gas heater-scan fingerprint (350–400°C steps rising above the 320°C reference, 85→93→110 kΩ) in your inspection log as a recurring July seasonal signature — this is the second week it has appeared and recording it builds valuable multi-season comparison context.▹ Action: Tilt is 2° and kurtosis is calm at 2.8 — no stand or disturbance action needed.