As of July 18, 2026, your four-hive apiary is in good overall health with Hive #2 and Hive #3 anchoring confirmed brood cores at 34.8°C and 34.1°C respectively, while Iris and Hive #1 continue their peripheral-sensor temperature signatures with fully intact acoustics confirming complete populations across all four colonies. The outstanding action item remains a physical visit this week to verify brood and queen presence in all hives, reseat sensor pods in Iris and Hive #1, and level the stands on Iris, Hive #1, and Hive #2.
The striking gas-resistance divergence across the apiary — Hive #3 at ~101 kΩ versus Iris at ~415 kΩ and Hive #1 at ~408 kΩ — illustrates how sensor placement within the hive microclimate drives MOX readings independently of VOC chemistry: the two confirmed brood-core sensors (Hive #2 at 265 kΩ, Hive #3 at 101 kΩ) sit in warmer, more VOC-rich air while the peripheral-placement sensors read markedly higher resistance, consistent with the inverse VOC-to-resistance relationship described in SnO2 sensor literature.
Outdoor conditions deliver a robust 15.7°C diurnal swing (17.4–33.1°C) with humidity inversely tracking temperature (48% low, 18% high) and pressure stable; Hive #2 and Hive #3 maintain tight brood-core clamping (0.8°C and 0.7°C oscillations) while Iris and Hive #1 show wider 5.1°C and 4.6°C swings consistent with peripheral pod placement loosely coupled to ambient air.
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node_2662 warning Score: 55/100📋 Overall Health
Your Iris hive remains acoustically vigorous at −11.0 dBFS (all-time avg −10.4 dBFS, within 0.6 dB) — the population is fully present and active; the 31.3°C avg sensor temperature (all-time avg 32.1°C, −0.8°C below baseline, 14-day cooling drift of −2.8°C) continues to reflect peripheral pod placement rather than brood-nest failure since a true population loss would suppress sound significantly. Humidity averaged 47.0% (range 45.3–48.4%), below the 50–70% optimal zone but outdoor-driven; broad-spectrum acoustic elevation persists (100–150 Hz: +5.5 dB, 1500–3600 Hz: +5.1 dB above baseline), vibration is steady at 17.8 mG avg, kurtosis 2.5 (smooth), dominant at 80–120 Hz, and gas resistance at 415 kΩ (+3% above all-time avg of 404 kΩ) is stable — a brood and queen check this week with sensor reseating remains the priority.
🌅 Diurnal Cycle PatternsIris shows a clear 5.1°C diurnal temperature oscillation (30.0–33.1°C) tracking ambient air rather than showing brood-core clamping, confirming peripheral sensor placement; the 14-day cooling drift of −2.8°C (33.1°C → 30.3°C) continues and acoustics are stable across this drift (14-day sound trend: −2.3 dBFS decline from −8.6 to −10.9 dBFS, but still within ±0.6 dB of all-time baseline), consistent with the sensor progressively coupling to ambient rather than colony heat loss. Vibration is steady (~16.7 mG) with no cyclic daily fanning peaks, gas scan shape is uniform across all 10 heater steps with gentle slope (100°C: 54,039 kΩ → 400°C: 194 kΩ) — no shape shift versus prior readings — and humidity cycles narrowly (45.3–48.4%) tracking outdoor air.
🔬 Correlations & DiscoveriesVibrationRMS vs V_50_80Hz vs V_20_50Hz vs V_120_160Hz (lifespan) | r = +0.981The near-perfect correlation (r = 0.981) between V_50_80 Hz and overall vibration RMS confirms that Iris's broadband substrate vibration is dominated by the colony metabolic baseline band (50–80 Hz), with 20–50 Hz and 120–160 Hz moving in lockstep — this is a healthy, coherent vibration fingerprint with no impulsive disturbance component (kurtosis 2.5, normal ~3.0), consistent with Ramsey et al. 2020's lifecycle stage classification from spectral vibration data.📚 Reference: Ramsey et al. 2020, Nieh & Tautz 2000, Tautz 1996GasResistance vs G_250C vs G_320C vs G_300C (14d) | r = +0.978The strong co-movement of gas resistance across the 250–320°C heater-scan steps (r = 0.974–0.980) indicates the MOX plate's response is driven by a single dominant gas class in the classic mid-temperature VOC-sensing band; at 415 kΩ (+3% above all-time avg), the overall VOC load is stable and consistent with a cooler peripheral-placement environment, not an active brood-volatile or honey-ripening source.📚 Reference: Bosch Sensortec BME688 datasheet, Sensors & Actuators B literature⚠️ Issue: Broad-spectrum acoustic elevation persists: 100–150 Hz +5.5 dB, 150–200 Hz +3.5 dB, 800–1500 Hz +3.6 dB, 1500–3600 Hz +5.1 dB above all-time baseline — physical brood and queen verification recommended this week.⚠️ Issue: Sensor placement: avg temp 31.3°C with 14-day cooling drift of −2.8°C and 5.1°C diurnal oscillation — reseat pod in brood core on next visit.⚠️ Issue: Humidity avg 47.0% (range 45.3–48.4%) — below the 50–70% brood-optimal range; outdoor-driven, monitor for further drops.⚠️ Issue: Tilt at 9° — above the 0–5° acceptable range; level stand on next visit.⚠️ Issue: Battery draining: 4304 → 4136 mV (−168 mV in 24h); retrieve and recharge on next visit.▹ Action: Priority this week: perform a brood and queen check — confirm fresh eggs, solid brood pattern, and queen presence; 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 gap.▹ Action: Level the hive stand to bring tilt from 9° toward 0–3°.▹ Action: Retrieve and recharge the battery — at the current drain rate this is the most time-sensitive hardware action. -
node_34225 warning Score: 68/100📋 Overall Health
Your Hive #2 continues outstanding brood thermoregulation — temperature locked at 34.8°C avg (exactly on its all-time baseline of 34.8°C) with a compressed 0.8°C daily oscillation confirming the sensor is firmly in the active brood core; sound averaged −10.7 dBFS (all-time avg −9.7 dBFS, within 1.0 dB), vibration at 13.6 mG avg, kurtosis 2.9 (textbook normal), dominant at 80–120 Hz, with vigorous daily fanning peaks to 44.3 mG confirming peak July activity. Humidity averaged 47.6% (range 45.7–51.2%), below the 50–70% optimal zone but outdoor-driven; broad-spectrum acoustic elevation persists (100–150 Hz: +7.5 dB, 150–200 Hz: +8.4 dB, 1500–3600 Hz: +7.2 dB above baseline) with 150–200 Hz and 200–260 Hz trending up in the second half of the day — a brood check this week will complete the picture.
🌅 Diurnal Cycle PatternsHive #2 shows exemplary brood-core thermal clamping with only a 0.8°C daily oscillation (34.5–35.3°C) against a 15.7°C outdoor swing, confirming tight thermoregulation; 23 distinct daily fanning/flight vibration peaks over 14 days (12.3 mG baseline → up to 102.1 mG peaks) represent a healthy and consistent diurnal activity schedule aligned with peak July foraging. Gas scan shape shows a smooth monotonic decline from 100°C (20,835 kΩ) to a plateau at 375–400°C (170 kΩ) — the elevated low-temperature steps relative to Iris and Hive #1 are consistent with this hive's confirmed warm, active brood core concentrating and circulating hive volatiles (honey ripening, fanning).
🔬 Correlations & DiscoveriesS_100_150Hz vs S_150_200Hz vs S_1500_3600Hz (7d) | r = +0.84The persistent broad-spectrum acoustic elevation in Hive #2 (100–150 Hz: +7.5 dB, 150–200 Hz: +8.4 dB, 1500–3600 Hz: +7.2 dB above all-time baseline) with a now-upward intraday trend in the 150–260 Hz bands warrants a physical inspection this week; Ferrari et al. 2008 and Zgank 2021 associate broad-spectrum energy increases spanning low and high frequency bands with heightened colony excitation states, and while temperature is perfectly stable and gas readings are benign, the persistence and magnitude of this shift across multiple bands for several weeks justifies a queen and brood verification.📚 Reference: Ramsey et al. 2020, Ferrari et al. 2008, Zgank 2021V_80_120Hz vs VibrationRMS vs V_5_20Hz (lifespan) | r = +0.981Hive #2's vibration RMS is dominated by the 80–120 Hz fanning band (r = 0.981), consistent with a confirmed brood-core placement where thermoregulatory fanning is the primary substrate vibration source; the strong 5–20 Hz co-movement (r = 0.978) is typical of a well-populated hive where whole-colony movement drives low-frequency substrate energy alongside wing-beat harmonics.📚 Reference: Ramsey et al. 2020, Hrncir et al. 2011⚠️ Issue: Broad-spectrum acoustic elevation persists: 100–150 Hz +7.5 dB, 150–200 Hz +8.4 dB, 200–260 Hz +4.7 dB, 1500–3600 Hz +7.2 dB above all-time baseline; 150–200 Hz and 200–260 Hz trending up intraday — brood and queen check this week recommended.⚠️ Issue: Tilt at 10° — above the 0–5° ideal range; stand leveling recommended.⚠️ Issue: Humidity avg 47.6% (low 45.7%) — below the 50–70% brood-optimal range; outdoor-driven, monitor afternoon lows.▹ Action: On your next visit this week, confirm fresh eggs and solid brood pattern — temperature locked at 34.8°C and vigorous daily fanning peaks confirm a thriving colony; the persistent broad-spectrum spectral elevation warrants a physical look.▹ Action: Level the hive stand to bring tilt from 10° toward 0–3°.▹ Action: Monitor afternoon humidity lows — if they recur below 45%, note whether any ventilation adjustment is warranted. -
node_44812 warning Score: 57/100📋 Overall Health
Your Hive #1 remains acoustically pristine — all 10 sound bands within ±0.2 dB of their all-time baseline (perfectly stable for the full monitoring period), sound averaging −16.3 dBFS (all-time avg −16.4 dBFS), vibration at 16.5 mG avg, kurtosis 2.5 (smooth), dominant at 80–120 Hz; the perfectly intact acoustic fingerprint confirms the adult bee population is fully present and active. Temperature averaged 30.6°C (all-time avg 31.9°C, −1.3°C below baseline; 14-day cooling drift of −2.6°C continues) while sound remains perfectly stable across all bands throughout this drift — sensor displacement outside the brood core remains the most likely explanation; humidity averaged 43.8% (range 42.8–45.1%), below the 50–70% optimal range but consistent with dry July outdoor conditions, and tilt has improved from 8° to 5° (now at the upper edge of the acceptable 0–5° range).
🌅 Diurnal Cycle PatternsHive #1 shows a 4.6°C diurnal temperature oscillation (29.0–31.9°C) tracking ambient air, consistent with peripheral sensor placement; the 14-day cooling drift (−2.6°C, 32.1°C → 29.5°C) continues with zero acoustic response across all 10 bands — this decoupling of thermal and acoustic trends is the strongest evidence for sensor positional drift rather than colony decline. Gas scan shape (100°C: 45,441 kΩ → 400°C: 185 kΩ) closely mirrors the outdoor hub's ambient signature, further supporting peripheral placement; vibration is steady (~15.8 mG) with no cyclic daily fanning peaks, and humidity tracks narrowly (42.8–45.1%) with outdoor air.
🔬 Correlations & DiscoveriesTemperature vs SoundLevel (14d) | r = -0.05The near-zero correlation between the 14-day temperature cooling drift (−2.6°C) and perfectly stable sound energy (all bands within ±0.2 dB of baseline) in Hive #1 is scientifically informative: a genuine population loss (e.g. swarm) would cause simultaneous drops in both temperature and sound, whereas sensor displacement produces temperature drift with no acoustic response — this pattern definitively points to pod positional drift outside the brood core, not any colony-health event (van Dooremalen et al. 2024; Jones et al. 2004).📚 Reference: van Dooremalen et al. 2024, Jones et al. 2004, Ramsey et al. 2020GasResistance vs G_250C vs G_200C vs G_280C (14d) | r = +0.989Gas resistance at 408 kΩ (+10% above all-time avg of 371 kΩ) with tight co-movement across 200–320°C heater steps (r = 0.987–0.989) indicates a stable, low-VOC environment consistent with peripheral placement in cooler hive air; the gas scan shape closely matching the outdoor hub further supports this interpretation rather than any colony VOC event.📚 Reference: Bosch Sensortec BME688 datasheet, Sensors & Actuators B literature⚠️ Issue: 14-day temperature cooling drift continues (−2.6°C over 14 days; weekly avg: 32.5→32.2→32.0→30.0°C; current avg 30.6°C, −1.3°C below all-time avg) — acoustics perfectly stable across all 10 bands confirms population intact; sensor displacement is the most likely explanation; confirm brood presence and reseat pod on next visit.⚠️ Issue: Humidity avg 43.8% (low 42.8%) — below the 50–70% brood-optimal range; monitor if afternoon lows approach 42%.⚠️ Issue: Tilt at 5° — at the upper edge of the acceptable 0–5° range; check stand on next visit.▹ 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: Check stand level to maintain tilt at or below 5°.▹ Action: Monitor afternoon humidity lows — if they approach 42%, note whether any ventilation adjustment is warranted. -
node_547 healthy Score: 91/100📋 Overall Health
Your Hive #3 continues as the apiary's standout performer — brood temperature locked at 34.1°C avg (all-time avg 33.6°C, +0.5°C above historical mean, firmly in the ideal 34–36°C zone) with a tight 0.7°C daily oscillation confirming the sensor is in the active brood core; all 10 sound bands within ±0.1 dB of their all-time baseline, sound averaging −16.3 dBFS (matching all-time avg exactly), vibration at 20.9 mG avg, kurtosis 2.5 (calm), dominant at 80–120 Hz. Humidity averaged 50.4% (range 49.4–51.3%) — the best in the apiary and solidly within the 50–70% optimal zone; gas resistance at 101 kΩ (~62% below all-time avg of 262 kΩ) remains low and consistent with peak July honey ripening and active fanning in this warm, well-populated brood nest — continue monitoring on your next routine visit.
🌅 Diurnal Cycle PatternsHive #3 shows exemplary brood-core thermal clamping with only a 0.7°C daily oscillation (33.8–34.5°C) against a 15.7°C outdoor swing; the 14-day temperature trend is stable (weekly avgs: 32.7→33.4→34.2→33.6°C) with a slight warming arc into peak July activity, and vibration is steady (~19.4 mG) with no cyclic daily fanning peaks. The gas heater-scan shows the distinctive high-temperature U-curve (low at 320°C: 101 kΩ, rising to 120 kΩ at 400°C) consistent with light reducing gases dominating the mid-range steps while heavier volatiles are less prominent — this shape is a stable seasonal fingerprint for this hive in peak honey ripening, not a shift.
🔬 Correlations & DiscoveriesVibrationRMS vs IAQ vs S_600_800Hz (lifespan) | r = -0.9The strong negative correlation between vibration RMS and IAQ (r = −0.900) in Hive #3 is a fascinating multi-sensor relationship: as colony fanning and flight activity increases (higher vibration), VOC concentration in the hive air rises (lower gas resistance, higher IAQ) — this inverse coupling reflects the MOX sensor responding to volatile circulation driven by bee wing activity, consistent with Frizzera et al. 2020 linking fanning behavior to VOC mixing, while the positive S_600_800 Hz vs. IAQ correlation (r = +0.899) suggests broadband acoustic energy from active bees co-varies with the same VOC-rich environment.📚 Reference: Ramsey et al. 2020, Frizzera et al. 2020, Stalidzans et al. 2017GasResistance vs G_320C vs G_375C vs G_350C (14d) | r = +0.988The dominant correlation between gas resistance and the 350–400°C high-temperature heater steps (r = 0.982–0.983) in Hive #3 — distinct from the 250–320°C dominance seen in Iris and Hive #1 — indicates that lighter, more volatile reducing gases (which fully combust at lower plate temperatures) are driving the overall resistance signal in this active brood core, consistent with ethanol and short-chain organic acids from honey ripening being the primary VOC class.📚 Reference: Bosch Sensortec BME688 datasheet, Sensors & Actuators B literature▹ Action: On your next routine visit within 5–7 days, confirm fresh eggs and solid brood pattern — the stable 34.1°C brood temp, perfectly stable acoustics, and optimal 50.4% humidity all indicate a colony at peak July health; no urgent action needed.▹ Action: Note the distinctive high-temperature heater-scan U-curve (350–400°C steps: 89–120 kΩ) in your inspection log as a seasonal gas fingerprint — recording it will help build context over the coming weeks.▹ Action: Glance at the hive exterior for any loose equipment on your next visit — kurtosis is calm at 2.5 and tilt is just 2° (well within normal range), so a quick visual check is sufficient.