PoolOne
IEMI's one product for the home pool: the pool gate itself, made smart, so it checks every close and makes the pool area's calls, a child with no adult first, in one home app
The self-closing, self-latching pool gate the barrier already has, at the same 50 mm posts, leaf, hinges and latch, reads every close with a Hall sensor and a magnet in the leaf, watches the deck and the water with a wide camera and a tracking radar in the latch post and the strip outside the fence with a camera in the hinge post; it calls a gate that bounced, stayed ajar or was propped, weakening hinge springs, a child in the pool area with no adult, someone in after hours and a fence climbed, shows each call on the latch post with a light and a tone, and keeps a signed gate log.
- Who buys it
- Families with a backyard pool (US and Australia first), pool fence installers as the channel, and later holiday-rental owners who must keep a compliant barrier.
- Why it pays
- $699 + $3/month per gate with its posts instead of about $999 for a new pool gate (about $500, est.), a MagnaLatch ALERT (about $150), our PoolDeck kit ($249, which already folded the PoolGuard Fence Kit) and an outdoor camera (about $100, est.), with pods on the gate and fence, a hub box and three apps.
- Target price
- $699 per smart pool gate with its posts (fitting by the fence installer extra) + $3/month family alerts and the signed gate log (target)
- First-minute wow
- A child lets the gate swing shut and it bounces 40 mm open; the latch post turns red with a fast tone, and ten seconds later every family phone says "Pool gate open 40 mm". An hour later a four-year-old is in the pool area with no adult: the gate sounds loudly and all phones ring at once.

What the research found
And how this design answers it
- Rev A (28 Oct 2026): the pool flagship is the pool gate itself. Everything sits inside the 50 x 50 posts and the leaf: Raspberry Pi Zero 2 W brain, Camera Module 3 Wide pool camera, LD2450 radar, DRV5055 Hall sensor, call lights, tone, ATECC608, tamper switch and a backup cell in the latch post; a second Camera Module 3 Wide and Pi Zero 2 W, the 5 V buck and a cell in the hinge post; a magnet in the leaf stile
- Makes the pool area's calls itself: gate bounced, ajar or propped, hinge springs weakening, a child with no adult, someone in after hours, fence climbed; climbable things outside and a child at the gate assist; unsure means unsure; never a drowning call
- Folds PoolGuard (gate LeafPod, PostTag, ClearZone pods) and PoolDeck (DeckHub on the fence): their gate and fence jobs now run in the gate
- Gaps listed: drowning detection (never claimed), the far fence, the pump pad (WaterLeak stays listed), water chemistry, house doors onto the pool, commercial after-hours voice warning
Use case
A family pool on a summer weekend
ParentsChildrenPool inspector or insurer
- 01Trigger: children running in and out all day, the gate swinging shut behind them
- 02Detect: the Hall sensor reads each close; the radar and the pool camera count who is in the pool area and how tall they are
- 03Act: a bounced gate or a child with no adult turns the latch post red with a tone, then every family phone rings
- 04Log: signed gate closes and calls in the app, shareable with an inspector
Outcome: A gate that did not latch is closed in seconds, a child alone by the water is called at once, and the barrier inspection comes with a signed log
How it works
Architecture
- 01
Sense: Hall sensor and leaf magnet, pool camera and radar in the latch post, outside camera in the hinge post
- 02
Decide: the Pi Zero 2 W reads every close, sizes and tracks people, and runs the after-hours and climb rules; unsure below the line
- 03
Show: red or amber call light and tone on the latch post
- 04
Tell: signed calls over Wi-Fi to the family app and a shareable gate log
Hardware
Real parts, buyable today
Bill of materials: about $424 per gate at qty 1 including the leaf and posts (prices checked 28 Oct 2026; leaf and posts est.).
| Block | Part | Why this part |
|---|---|---|
| Brain | Raspberry Pi Zero 2 W | One brain in the latch post with Wi-Fi and a camera port |
| Cameras | 2 x Raspberry Pi Camera Module 3 Wide | The deck and water from the latch post; the strip outside from the hinge post |
| People | HLK-LD2450 radar | Tracks up to 3 people day and night; notices a climb |
| Gate | TI DRV5055 Hall sensor + MCP3021 + N42 magnet | Reads every close to a fraction of a millimetre |
| Calls | 2 x Adafruit NeoPixel Stick 8 + Adafruit 160 piezo | The call on the gate itself |
| Security and power | Adafruit 4314 ATECC608 + 2 x Omron D2F-01 + Pololu D36V28F5 + 3 x 18650 | Signed calls, tamper log, 5 V from the buried 12 V lead, power-cut backup |
Mechanical
Printable CAD
3 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…
Real CAD · drag to rotate · scroll to zoomReal CAD · swipe sideways
Bought hardware fitted inside this part (checked in the CAD: nothing collides with the plastic)
- Smart latch post (brain, pool camera, radar, Hall sensor, call lights, tone, secure element, tamper switch and two cells inside)latch-post.stl · Aluminium 50 x 50 x 2, powder-coated black, printed ASA cap
- Smart hinge post (outside camera, its computer, 5 V buck, cell and tamper switch inside)hinge-post.stl · Aluminium 50 x 50 x 2, powder-coated black, printed ASA cap
- Gate leaf (magnet in the latch stile)gate-leaf.stl · Aluminium frame and pickets, powder-coated black
Open risks we are working on
- Child or adult by height from one camera is untested; crouching adults and tall children will be unsure calls (pool tests P-T1)
- Glare on the water and night light change what the camera sees; the radar carries the night calls
- A 50 mm post runs warm in summer sun; the Pi Zero 2 W and the cells must stay in range (heat test P-T2)
- Pool alarm makers and pool camera makers may add gate sensing; our edge is the gate itself and the signed log
- Not a barrier, a pool alarm or drowning detection: it monitors and alerts; buyers must never read it as supervision
Design stage only: nothing on this page is for sale. Specifications and prices are targets.