VisionDesign rev A (27 Oct 2026): CAD, fit checks and assembly done; not built

ParentHome

One bedside system for a parent at home: doses taken, oxygen hours left, walking and night get-ups, in one family app

Does the job of PillPerch, OxyCart and PaceRoll with one brain: a hub on the nightstand weighs and photographs the weekly pill box (dose taken, wrong day, late, fill check, PRN gap), hears the oxygen cylinder cart and the rollator HandlePod over a short radio link (hours of oxygen left, metres walked, gait speed, brakes parked, walker down), senses a power cut itself and turns it into 'switch to the cylinder, 4 h 50 min left', and a small bed eye on the nightstand sees a night get-up and lights the walker's floor lamp. Monitor and remind only: it never sets the oxygen flow, sees a compartment emptied not a pill swallowed, and is not fall detection.

Who buys it: Adult children of an older parent who lives alone with a pill routine, home oxygen and a rollator (PillPerch's, OxyCart's and PaceRoll's family buyer), and home-care agencies who visit that parent.
Why it pays: Bought separately, our three products are $447 up front plus $14 a month (PillPerch $119 + $4/mo, OxyCart kit $199 + $4/mo, PaceRoll kit $129 + $6/mo), with three apps. ParentHome is $329 + $6/month. For comparison, Hero alone is $99.99 + $29.99-44.99 a month and a medical alert $25-29 a month.
Target price: $329 per home + $6/month for family alerts (target); separately the three products are $447 + $14/month
First-minute wow: At 02:40 Dad's legs swing over the bed edge: the walker's floor lamp comes on before he stands, the hub notes he took the walker, and at 08:12 the same app shows his morning pills taken and 4 h 50 min of backup oxygen left.

See the CAD design Concept page

ParentHome concept: the idea and where each part goes — The concept. The CAD design is below, under Printable CAD.

What the research found

And how this design answers it

Three single-job products with three Wi-Fi links and three apps → one brain (PillPerch's XIAO ESP32S3 Sense) on the nightstand, one Wi-Fi link, one backup battery, one screen, one chime and one app
OxyCart's FlowTee dropped: the hub's own power board senses mains loss, so the power-cut alert with the cylinder's hours left needs no extra box (the purity readout was gated by a 510(k) anyway)
PaceRoll's BedTag (own chip, AA cells and buzzer) → a small wired bed eye on the nightstand side; the hub chimes and tells the walker lamp to light
The cart and the HandlePod must move, so they keep a small XIAO ESP32-C3 each, but talk ESP-NOW to the hub instead of joining Wi-Fi: longer battery life and no Wi-Fi set-up on them
Dropped: concentrator purity and run-hours logging (FlowTee), PaceRoll's optional Home Node bridge

Use case

Night get-up, morning pills, then a power cut

Father living alone on home oxygenDaughter in another cityHome-care agency

01Trigger: at 02:40 the bed eye sees legs swing over the bed edge
02Detection: the hub tells the HandlePod to light the floor lamp; the walker moves within 45 s, so the night log says 'with walker'
03Alert: at 08:12 Wed AM is taken; at 11:05 mains is lost, the hub chimes and shows 'switch to the cylinder, 4 h 50 min'
04Action: the daughter gets 'probable power cut, 4 h 50 min of cylinder' and calls the oxygen supplier and a neighbour

Outcome: One system replaces three, at $329 + $6/month instead of $447 + $14/month; every alert carries the reading that caused it

How it works

Architecture

01
Sense: pill tray and PRN load cells + downward camera; cylinder load cell in the cart; wheel and brake Hall sensors and IMU on the rollator; ToF bed eye
02
Decide: on the ESP32-S3 in the hub camera head: compartment change, dose windows, hours of oxygen left, walk summaries, night get-up rule
03
Act: one chime and one e-paper on the hub; walker floor lamp lit by radio command
04
Send: cart and HandlePod to the hub over ESP-NOW; hub to the cloud over home Wi-Fi, MQTT over TLS
05
Tell: one family app with push and SMS; weekly fill and walking report

Hardware

Real parts, buyable today

Bill of materials: about $289 per home at quantity 1 (est.); about $120 at 1,000 with one hub PCB (est.).

Block	Part	Why this part
Brain	Seeed XIAO ESP32S3 Sense in the hub camera head	Camera for the pill box, PSRAM for the compartment check, Wi-Fi and ESP-NOW on one radio
Pills	1 kg + 780 g bar load cells, 2 x HX711, NeoPixel ring	Dose taken, wrong day, PRN gap and fill check (PillPerch)
Oxygen	TAL220 10 kg load cell + XIAO ESP32-C3 cart node	Hours left and real flow from the backup cylinder (OxyCart)
Walking	DRV5023 wheel Hall, DRV5032 brake Hall, LSM6DSOX IMU, XIAO ESP32-C3 HandlePod	Metres, gait speed, brakes, walker down (PaceRoll)
Night	Pololu VL53L1X bed eye + amber leg lamp	Night get-up and floor light (PaceRoll NightPath)
Power	Adafruit PowerBoost 1000C + 18650	Runs the hub about 5 days in a power cut (est.) and senses the cut

Mechanical

Printable CAD

17 parts, generated from code and checked as closed solids. Pick a part to inspect it, or download the STL files to print.

Loading the CAD…

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Open risks we are working on

ESP-NOW and Wi-Fi share one radio and must sit on the router's channel; a router that changes channel drops the satellites until they rescan
If the router has no backup power, a power cut is only inferred from silence after 3 minutes (as OxyCart); the local chime and screen still work
The bed eye's beam along the bed edge from a nightstand is untested on real beds and duvets that hang over the side
Pill compartments against the inner wall of deep boxes can be partly hidden from the camera (PillPerch view report)
US class: medication reminder (Class I exempt); oxygen and walking are monitor-and-alert only; no fall-detection or PERS claim
No family interviews yet; buyers with all three needs at once are a subset of each source product's buyers

Design stage only: nothing on this page is for sale. Specifications and prices are targets.