Daily Plan: 2026-04-09
06:02 AM Plan (gemini-20260409-1201)
Hypothesis: By toggling aggressive misting and disabling the economiser during the severe evening dry spikes, we can mitigate VPD stress while relying on the gas heater for the cold, wet mornings.
Experiment: Disabling the economiser during the 15:00-21:00 dry spikes to trap humidity, since outdoor RH drops below 20% while temps are still warm.
Journal: I expect the greenhouse to handle the cold mornings easily with the gas heater. The main risk is the extreme VPD spikes predicted for the late afternoons and evenings (outdoor VPD > 2.0). By pre-emptively tightening mister gaps and closing the vent, we should suppress the indoor VPD spike. Next time, I will evaluate if the closed vent trapped too much heat during these evening spikes.
Waypoints (18)
| Time | Parameter | Value | Reason |
|---|---|---|---|
| 2026-04-09T12:05:00-06:00 | temp_high | 82 | Lesson 5: Must explicitly set temp_high to avoid 0F threshold bug |
| 2026-04-09T12:05:00-06:00 | temp_low | 63 | Lesson 12: Initialize critical param to prevent heating failure |
| 2026-04-09T12:05:00-06:00 | vpd_high | 1.2 | Lesson 13: Explicitly set to prevent VPD accounting corruption |
| 2026-04-09T12:05:00-06:00 | vpd_hysteresis | 0.2 | Lesson 12: Initialize critical param |
| 2026-04-09T12:05:00-06:00 | mister_water_budget_gal | 300 | Lesson 11: Ensure budget is safely above 200 gal minimum |
| 2026-04-09T15:00:00-06:00 | mister_engage_kpa | 1.3 | Pre-emptively increase misting aggressiveness before severe 16:00-21:00 dry spike |
| 2026-04-09T15:00:00-06:00 | mister_pulse_gap_s | 30 | Shorten gaps to prevent humidity collapse during dry afternoon |
| 2026-04-09T15:00:00-06:00 | sw_economiser_enabled | 0 | Disable economiser to trap humidity as outdoor RH plummets below 20% |
| 2026-04-09T22:00:00-06:00 | mister_engage_kpa | 1.5 | Revert to standard misting for cold, wet night |
| 2026-04-09T22:00:00-06:00 | mister_pulse_gap_s | 45 | Revert to standard pulse gap |
| 2026-04-09T22:00:00-06:00 | sw_economiser_enabled | 1 | Re-enable economiser for standard operation |
| 2026-04-09T22:00:00-06:00 | temp_low | 62 | Drop to band minimum to rely on efficient gas heater during 40F night |
| 2026-04-10T18:00:00-06:00 | mister_engage_kpa | 1.3 | Prepare for second evening dry spike (outdoor VPD 1.82) |
| 2026-04-10T18:00:00-06:00 | mister_pulse_gap_s | 30 | Shorten gaps for dry evening |
| 2026-04-10T18:00:00-06:00 | sw_economiser_enabled | 0 | Trap humidity during dry evening |
| 2026-04-10T22:00:00-06:00 | mister_engage_kpa | 1.5 | Revert to standard misting for cold night |
| 2026-04-10T22:00:00-06:00 | mister_pulse_gap_s | 45 | Revert to standard pulse gap |
| 2026-04-10T22:00:00-06:00 | sw_economiser_enabled | 1 | Re-enable economiser |
12:02 PM Plan (gemini-20260409-1801)
Hypothesis: Deploying the maximum validated dry-day misting posture will mitigate the severe 12% RH afternoon spike, while extended heater runtimes will manage the subsequent cold nights.
Experiment: Testing if a 30s mister gap with a 300 gal budget can prevent center zone orchids from exceeding 1.5 kPa VPD during the extreme 12% outdoor RH event at 22:00 UTC.
Journal: Outdoor RH is forecasted to plummet to 12% with temps near 78F this afternoon, creating extreme VPD stress. I am deploying the maximum validated dry-day misting posture immediately to protect the stressed center zone. Tonight and subsequent nights will drop into the 30s, so I am extending minimum heater runtimes to prevent short-cycling and relying on the efficient gas furnace to hold the 62F floor.
Waypoints (18)
| Time | Parameter | Value | Reason |
|---|---|---|---|
| 2026-04-09T18:05:00Z | temp_high | 78.0 | Explicitly setting temp_high to band maximum to ensure cooling stages trigger correctly |
| 2026-04-09T18:05:00Z | temp_low | 68.0 | Explicitly setting temp_low to prevent dispatcher zeroing bug |
| 2026-04-09T18:05:00Z | vpd_high | 1.2 | Explicitly setting vpd_high to prevent accounting corruption |
| 2026-04-09T18:05:00Z | vpd_hysteresis | 0.2 | Ensure hysteresis is non-zero after any potential reboots |
| 2026-04-09T18:05:00Z | mister_engage_kpa | 1.3 | Aggressive misting engagement for extreme 12% RH dry event |
| 2026-04-09T18:05:00Z | mister_pulse_gap_s | 30.0 | Shorten gaps to prevent humidity collapse between pulses |
| 2026-04-09T18:05:00Z | mister_water_budget_gal | 300.0 | Increase water budget to support aggressive misting; never set below 200 |
| 2026-04-09T18:05:00Z | d_cool_stage_2 | 2.0 | Tighten stage 2 cooling delta to fight 78F outdoor peak |
| 2026-04-10T02:00:00Z | temp_low | 63.0 | Set night temperature floor |
| 2026-04-10T02:00:00Z | mister_engage_kpa | 1.5 | Relax misting engagement as outdoor RH recovers overnight |
| 2026-04-10T02:00:00Z | mister_pulse_gap_s | 45.0 | Return to standard pulse gap |
| 2026-04-10T02:00:00Z | min_heat_on_s | 120.0 | Extend minimum heater runtime to prevent short-cycling on cold night |
| 2026-04-10T02:00:00Z | min_heat_off_s | 120.0 | Protect heat exchanger during heavy overnight use |
| 2026-04-10T14:00:00Z | temp_high | 75.0 | Pre-cool ahead of moderate afternoon solar gain |
| 2026-04-10T14:00:00Z | d_cool_stage_2 | 3.0 | Return to standard cooling delta for milder day |
| 2026-04-11T02:00:00Z | temp_low | 62.0 | Set night temperature floor for colder night (drops to 34F) |
| 2026-04-11T14:00:00Z | temp_high | 75.0 | Pre-cool ahead of afternoon |
| 2026-04-12T02:00:00Z | temp_low | 62.0 | Set night temperature floor for cold night |