Evening Routine Engineering: Smart Wellness Room for the 18:00–22:00 Window
Research shows that the 18:00–22:00 period sees emergency incidents among elderly living alone at 2.3 times the rate of other periods. The main causes are accumulated fatigue, changing light levels, blood pressure fluctuations after dinner, and the physical transition from activity to sleep — all occurring simultaneously in a vulnerable population.
Phase 1: Cooking Period (18:00–19:30) — Automated Kitchen Safety
This phase carries the highest risk from gas, heat, and wet-floor slipping. The Smart Home system should operate as follows: when the kitchen mmWave detects the elderly person entering, the Smart Plug on the electric stove activates with a 45-minute timer. If the person leaves the kitchen without switching off the stove, the Smart Speaker issues a warning first; if there is no response within 3 minutes, the system cuts power automatically and notifies family. The Gas Sensor runs 24/7 — if a gas leak is detected, it closes the valve and triggers an emergency alert immediately.
Kitchen lighting should be set to 300–500 lux (2–3 times brighter than the bedroom), and Smart Bulbs adjust automatically as natural light fades.
Phase 2: Relaxation Period (19:30–21:00) — Circadian Lighting and Social Connection
After dinner, the body begins releasing Melatonin and blood pressure drops. This phase calls for reduced stimulation and a gradual transition toward sleep readiness.
Automated actions: Smart Bulbs shift automatically from Cool White (6,500K) to Warm White (2,700K) to promote Melatonin secretion. The Smart Speaker plays ambient music or natural sounds below 60 BPM, which lowers heart rate to support sleep preparation. At 20:00, the Smart Speaker asks briefly: “Have you taken your evening medication?” and records the response. If there is no response within 5 minutes, the system sends a message to family.
If mmWave detects the elderly person has not moved for more than 90 minutes in the living room, the system checks vital signs and alerts family if readings are abnormal.
Phase 3: Pre-Sleep Period (21:00–22:00) — Smart Bed Pre-Sleep Mode
This phase carries the highest bathroom fall risk: the person is drowsy but still needs to walk to the bathroom before bed.
Automated actions: when mmWave detects movement from living room to bedroom, corridor and under-bed lights activate automatically at 30–50 lux (bright enough to navigate without stimulating the brain to wake up). The Smart Bed enters Pre-Sleep Mode, adjusting to Zero-Gravity position (head raised 15°, feet raised 5°), which reduces acid reflux and lowers cardiac load. The bathroom Panic Button enters High-Sensitivity Mode for the night.
When the Smart Bed detects the person has lain down (pressure sensor reading increases), the system switches off all lights, activates Night Monitoring mode, and automatically sends an “all clear” notification to family.
Case Study: Elderly Woman, Age 77, Chatuchak, Bangkok
She lives alone with knee degeneration and hypertension. Before installation, her daughter called every evening to check in — stressful for both. After installing the Evening Routine system (budget: 22,000 THB), the system notifies the daughter when medication is taken and sends an automatic “went to bed at 21:47” report each night. Over 8 months since installation, no emergency events have occurred.
Evening Routine System Budget
Smart Plug and Timer (kitchen): 800–1,500 THB. Gas Sensor: 1,500–3,000 THB. Circadian Smart Bulbs (living room and bedroom): 2,000–4,000 THB. Smart Speaker: 2,000–3,500 THB. mmWave (living room and bedroom): 5,000–10,000 THB. Smart Bed with Pre-Sleep Mode: 25,000–40,000 THB. Total: 36,300–62,000 THB. Starting with kitchen safety and Circadian Lighting alone costs only 4,000–6,000 THB — a practical first step before adding other systems.