PoolOne

How it fits together

PoolOne, part by part

Scroll or tap a part. Press “See the 3D CAD design” to watch the model, built from our CAD, light each part up and show how it connects.

See the 3D CAD designShow the concept

Real-time 3D render · drag to rotate · final design may varySwipe sideways to rotate

1. 01

   The whole PoolOne

   The pool gate is the pool area's own watcher: a camera and radar in the latch post, a camera in the hinge post and a magnet in the leaf feed one brain that reads every close, makes the pool-area calls, lights them on the gate and tells the family.

2. 02Brain

   Raspberry Pi Zero 2 W (in the latch post)

   The brain: it runs the poolone-fw program

3. 03

   Gate close sensor

   A Hall sensor behind the latch post wall reads the magnet in the leaf stile: latched, bounced, ajar or propped, and how long each close took

   Raspberry Pi Zero 2 W (in the latch post) · Analog, through a 12-bit MCP3021 ADC (SOT-23, on the Hall carrier) on I²C · Gap to the magnet, 100 times a second while the gate moves

4. 

   04

   Pool camera

   Looks down at the deck and the water from 1.45 m: child or adult by height, someone in the water after hours, the gate opening

   Raspberry Pi Zero 2 W (in the latch post) · CSI-2 ribbon to the brain · Video, 2 frames a second analysed, never stored

5. 

   05

   Tracking radar

   Tracks up to 3 people in the pool area, day and night, and notices a track that starts inside with no gate opening

   Raspberry Pi Zero 2 W (in the latch post) · UART · x, y and speed of each person, 10 times a second

6. 

   06

   Outside camera (hinge post)

   Looks at the 900 mm strip outside the fence by the gate: chairs, bins and toys left against it, a child at the gate

   Raspberry Pi Zero 2 W (in the latch post) · Its own Pi Zero 2 W, wired Ethernet-over-USB in the buried lead to the brain · Strip change and person events, with a still

7. 07

   Call lights and tone

   Shows each call on the latch post: red on both faces for an open gate or a child alone, amber for a weak spring or a climbable object, with a tone

   Raspberry Pi Zero 2 W (in the latch post) · One data wire + PWM pin · Light colour and tone

8. 08

   Secure element, tamper switches and power

   Signs each call; marks the log if a post cap is opened; 12 V buried lead to 5 V, with two backup cells in the latch post and one in the hinge post (about 10 h, est.)

   Raspberry Pi Zero 2 W (in the latch post) · I²C + GPIO; 5 V in the buried lead · Signatures, tamper flag, power

9. 09

   All connected

   7 key parts, one program, and your phone

Our circuit board · rev A-0

One board of our own inside PoolOne

Every chip on one board we design, shaped to fit: the processor, cameras and sensors, Wi-Fi and Bluetooth, lights, sound and power. No plugs, ribbons or adapters. It is checked in our CAD against every part around it, and it arrives from the maker ready to run our software from a microSD card. Turn the model, or pick a part below to see where it sits.

Demo · 6 real-world moments

See PoolOne work

Short animated scenes of real moments: what happens today, what PoolOne does about it, and what lands on your phone. The same scenes play in the IEMI app.

Demo scenes show how PoolOne and its app are designed to behave. PoolOne is in design; nothing here is recorded from real equipment yet.

The idea

The pool gate itself checks every close, watches the pool area and calls a child with no adult there

How the parts connect

PoolOne, wired up

Every part, what links it to the brain, and how the data reaches your phone. A solid line is a cable; a dashed line is a radio link.

The program

What controls PoolOne

while True:
    tracks = ld2450.read()                  # up to 3 people, x/y/speed
    gap = hall.gap_mm()                      # 0.0 when latched
    if gate.moving(gap):
        calls += gate.close_call(hall.sample(hz=100))
    if tick.half_second():
        people = size(detect(poolcam.frame()), tracks)
        calls += area_step(people, gap, hours, outside.events())
    for c in calls:
        if c.conf < c.line: c.kind = 'unsure'   # never guess
        atecc.sign(c); light_and_tone(c); mqtt.publish(c)
    calls.clear()

To your phone

How the data reaches PoolOne home app

Family phones (Android and iPhone); a read-only gate log link for a pool inspector or insurer if the family shares it

1. Pool gate
2. Home Wi-Fi (WPA3) · MQTT over TLS
3. IEMI cloud
4. Push and SMS
5. Family phones

Key specs

Targets for production units; they may change during development.

Pricing

Target pricing for the gate with its posts; fitting by the fence installer is extra, as for a plain gate. Bought separately, a pool gate (about $500, est.), a MagnaLatch ALERT (about $150), our PoolDeck kit ($249) and an outdoor camera (about $100, est.) add up to about $999. Parts cost about $424 per gate at qty 1 (prices checked 28 Oct 2026; leaf and posts est.).

Indicative launch pricing in USD, excluding taxes and shipping. Final pricing is confirmed before any balance is charged.

1. 4 Nov 2026, 03:05LatestA family buys PoolOne as the self-closing, self-latching pool gate its barrier needs (ISPSC Section 305 and AS 1926.1: a gate at least 1,200 mm high, gaps under 100 mm, the latch release at 1,500 mm or more), so the electronics must be boards an assembly house makes and tests the same way every time, inside the gate's own 50 mm aluminium posts, with nothing plugged together inside, and still seeing the deck, the water and the strip outside the fence from there.

   • What we designed: one rigid-flex board of our own up each gate post, shaped as a narrow spine that stands in the 46 mm bore. The latch-post board, 8 layers, carries the RV1126B with a copper block to the post wall (the aluminium post is the heat sink), memory, Wi-Fi and Bluetooth, the security chip, a 3D Hall chip that reads the leaf magnet through the wall, two soldered cells with their charger, eight call lights on each face and the sounder. A head tilted 20 degrees down holds the 8 MP pool camera chip just inside the pool window; a second head lies flat behind the radar window with the 60 GHz radar chip and the Wi-Fi antenna; a tab under the cap holds the tamper switch and the microSD card with our software. The hinge-post board, 4 layers, carries the ESP32-S3 module, the outside camera chip on a head tilted 35 degrees down, one cell, the 12 V input from the buried lead and the link to the latch post. It replaces two Pi Zero 2 W boards, two camera modules, the radar module and the Adafruit and Pololu boards. See /build/poolone-boards
   • How we checked it: the boards are written as code and opened in KiCad (0 design-rule violations). The code places 56 parts at their sizes and checks each sits on its board inside the post bore with no overlaps; that the lights, sounder, radar and antenna sit on their openings; in 3D, that both camera heads and lenses stay inside the posts and clear of the spines; that every call in the design (the pool corners, someone in the water at the far corner 10.3 m away, the deck inside the gate, the fence line, the strip outside) is inside its sensor's view; and that each lens's widest ray clears the edge of its window. Design review with the shared rules: 18 pass, 1 fixed, 7 to prove, 0 fail. A 3D model shows the boards in see-through posts or laid flat, and the quote pack and design files are on the board page
   • What we learned: the first gate design put the radar behind a 1 mm aluminium skin, and a 60 GHz radar cannot see through metal at all. The slot now goes right through the pool face with a clear 1.5 mm radome bonded in (the rev T post design), and the Wi-Fi antenna shares it, since the post is otherwise a metal tube. The outside lens was chosen from its calls: cropping its rows keeps the view down to the strip inside what the window's edge leaves (the window lesson from DockOne). Black pool fence posts get hot, so the boards call for a heat-reflective black finish and keep the cells low in the post (est. 56 degrees C in full sun, to prove). About $105 a gate in electronics at 1,000 gates (est.)
   • What is next: the rev T post CAD with the boards inside, every part checked in 3D; Wi-Fi range from the radome slot; the Hall field at each gate position; and the next product's board, ClassOne

   See it in 3DFull research and design

2. 29 Oct 2026, 21:46New pool barriers in Australia move to AS 1926.1:2024 as the states adopt NCC 2025 (Victoria and the ACT from 1 May 2026, NSW, Queensland and South Australia from 1 May 2027), with revised gate latch and hinge requirements and guidance on keeping objects and plants out of the non-climbable zones (Standards Australia, SPASA). In the US the 2027 pool code reorganises its gate and door section (ICC).

   • Market and rules check (DESIGN.md): AS 1926.1:2024 through NCC 2025 with each state's adoption date (Western Australia keeps the 2012 edition for private pools), the 500 mm boundary barrier rule, the 2025 supplement, the ISPSC 2027 gate section and three competitors, each with what it changes in PoolOne
   • Gate hardware: the gate's own self-closing hinges and magnetic latch are bought marked to AS 1926.1:2024, and setup asks which edition the state applies; no CAD change, nothing sits in the latch path
   • Assist call widened: the outside camera now also notes plants or branches growing into the 900 mm strip by the gate, with the chairs and bins it already photographs each evening; no new part or camera view
   • Rules: two new rule lines in equipment.json, AS 1926.1:2024 by NCC 2025 and the ISPSC 2027 edition (final gate wording to re-check before US sale)
   • Competitors: the Trident Safe Signal magnetic latch (about $237, alarm after 15 s unlatched) is now the closest alarm latch beside the MagnaLatch ALERT; no app-connected smart gate found for 2026. Price kept at $699
   • Product page https://iemilabs.com/products/poolone/ gains a 2026 pool fence rules FAQ, a latch spec line and the Trident latch in the price FAQ
   • Next: ask pool fence installers in Victoria in the phase 3 buyer review whether the marked hardware and a plants-in-the-strip note help at inspection; close-out C9 (recommend the first product to the owner) from 30 Oct 00:00

   See it in 3DFull research and design

3. 28 Oct 2026, 22:19A family with a backyard pool needs to know at once when the gate did not latch or a child is in the pool area with no adult: CPSC's June 2026 report counts about 376 child pool and spa drownings a year, most under five and most at home, and today a gate alarm ($62) or an alarm latch ($150) only beeps at the gate.

   • Buyer check with sources: what families pay today for a gate, an alarm latch and a gate alarm, the June 2026 CPSC drowning figures, and the three closest products
   • What we learned: the cheapest thing a family buys instead is a $62 battery gate alarm (Poolguard GAPT) with no phone or log; the MagnaLatch ALERT is now about $150 at its maker's store, so the separate total fell from about $1,039 to about $999
   • Price kept at $699 per gate with its posts + $3 a month; the page now says plainly that the fence installer's fitting is extra, as for a plain gate
   • Power recounted: the brain post draws about 2 W, not 1 W, so a second backup cell now sits inside the latch post (CAD fit checked), and both posts keep watching for about 10 hours in a power cut (est.)
   • Parts list prices checked on shop pages today: $424 of parts per gate at qty 1; cost and margin table in the design notes (about 29 % at qty 1 and 47 % at qty 100, est.)
   • Product page: the first three FAQs answer the buyer's top questions (does it stop drowning, why not a gate alarm, do I have to replace my gate), and the power and price lines match the design

   See it in 3DFull research and design

4. 28 Oct 2026, 06:40A family pool needs a gate that is known to be latched and someone told at once when a child is in the pool area with no adult. CPSC finds most child drownings at home happen outside swim time, and the pool code (ISPSC 305, AS 1926.1) relies on a self-closing, self-latching gate that families never check. Today they buy a gate, an alarm latch that only beeps at the gate (MagnaLatch ALERT, about $171-210) and cameras that do not know who is an adult.

   • New flagship PoolOne: the self-closing, self-latching pool gate made smart, at the same 50 mm posts, 1,200 mm leaf, hinges and latch (84 mm picket gaps, 75 mm under the leaf, latch release at about 1,520 mm, all asserted in the CAD)
   • Latch post: Pi Zero 2 W brain, Camera Module 3 Wide over the deck and water, LD2450 radar, DRV5055 Hall sensor, call lights on both faces, tone, ATECC608 secure element, tamper switch and a backup cell; hinge post: outside camera, its computer, 5 V buck, cell and tamper switch; a magnet in the leaf
   • Makes 7 pool-area calls (5 alone, 2 assist) and says unsure below a stated confidence, never a drowning call; equipment.json with ISPSC and AS 1926.1 rules, calls, impact and security; yard plan, 6 integration parts, 5 app screens with No adult there mode
   • Shared from PoolGuard (close states and the hinge-spring model) and PoolDeck (one brain, one app); dropped the LeafPod, PostTag, ClearZone pods, DeckHub and pad pucks; gaps listed: drowning detection (never claimed), the far fence, the pump pad (WaterLeak stays listed), water chemistry, house doors, commercial after-hours voice
   • CAD review: 16/16 parts fit with datasheet sizes, 15 camera and radar views checked, no collisions, no floating parts; page at /products/poolone/, $699 + $3/month vs about $1,039

   See it in 3DFull research and design

5. 28 Oct 2026, 06:40One product for the home pool (owner decision, 27 Oct 2026).

   • Its jobs now run in PoolOne, the smart pool gate: /products/poolone/

   See it in 3DFull research and design

6. 28 Oct 2026, 06:40One product for the home pool (owner decision, 27 Oct 2026).

   • Its jobs now run in PoolOne, the smart pool gate: /products/poolone/

   See it in 3DFull research and design

Smart equipment · legal on the field

PoolOne is the self-closing, made smart

It replaces the pool's existing gate and its two posts (an aluminium pool gate with posts, self-closing hinges and a top-pull magnetic latch, about $400-700 installed, est.); the gate's own hinges and latch are kept, with every part built in. Everything inside the gate: brain, pool camera, radar, Hall sensor, call lights, tone, secure element, tamper switch and two backup cells in the latch post; the outside camera, its computer, the 5 V buck and a backup cell in the hinge post; a magnet in the leaf stile. Same 50 mm posts and leaf; about +0.4 kg (est.); no LeafPod, PostTag, ClearZone pods or DeckHub on the fence.