Wall kiosk · The Bhangar household
Home Centre
दीवार कैलेंडर, made alive. A silent, always-on wall display for one household — the day's medicines, meals, events, and weather, readable from the sofa, Hindi first. On the wall since July 2026.
Running in the house — an appliance, not a product for sale.
What it shows
Every Indian home has a wall calendar. This one is alive.
The whole day, one glance
Twelve fixed regions: today's medicines person by person, a three-day meal plan, events, chores, the daily help's in-and-out, weather with a 24-hour meteogram, gold and silver rates, and the day's panchang.
Hindi first, sofa-readable
Devanagari carries the meaning; English assists in smaller type. Every element passes the Sofa Test — legible from three metres — and the layout never scrolls: it is measured to fit, with headroom.
More than a dashboard
When the room is empty in daylight, the wall becomes one of twelve Indian folk artworks. At night it dims to a glow. Any family phone can put one of nine aartis on the wall, and a cheerful Hindi clock chimes the hour.
How it works
A Mac that remembers, a Pi that never sleeps.
- 01
The Mac keeps the record
A local PostgreSQL on the household Mac is the system of record. Medical data never leaves the house, and there is no AI anywhere in the medical path.
- 02
The Pi never sleeps
A Raspberry Pi 4 drives a 24-inch portrait display, pulling a fresh snapshot every five minutes over Tailscale and keeping the last good one on disk.
- 03
It sees the room
A mmWave presence sensor in a 3D-printed enclosure tells the wall when the room is empty — that is when the art comes out.
- 04
It fails honest
Bad data is refused at an acceptance gate; a power cut boots back to the wall in about 26 seconds, and nothing paints until the clock is trusted.
House rules
The rules it lives by.
Calm is a feature — no app, no login, no touch. The wall is glanced at like a wall clock and never touched.
The Sofa Test: legible at three metres, often without glasses. If it needs squinting, it grows or it goes.
Hindi first: हिन्दी carries the meaning and takes the larger, darker setting; English assists.
The Gold Silence Rule: gold appears only on SOS medicines. Anywhere else would devalue the alarm.
Fail honest, never wrong — a dimmed dose that reads as taken would be a medical misread, so the wall repaints the last good frame instead of guessing.