PoolGuard

How it fits together

PoolGuard, 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 PoolGuard

   A pod on the pool gate measures every close with a motion sensor and magnet gauge, and alerts your phone if it did not latch.

2. 02Brain

   XIAO ESP32-C3 (LeafPod)

   The brain: it runs the leafpod-fw program

3. 03

   LSM6DSOX motion sensor

   Wakes the pod when the gate moves; gives swing angle and speed

   XIAO ESP32-C3 (LeafPod) · I²C (4 wires) · Gyro angle and speed

4. 04

   DRV5055 Hall sensor

   Reads the gap to the latch-post magnet to 0.08 mm

   XIAO ESP32-C3 (LeafPod) · Analog pin and GPIO power · Magnet field level

5. 05

   PostTag magnet

   Marks the latch post so the gap can be measured

   XIAO ESP32-C3 (LeafPod) · Magnetic field only · Field the Hall sensor reads

6. 06

   Piezo chirp

   Chirps at the gate when a close does not latch

   XIAO ESP32-C3 (LeafPod) · GPIO pin · Chirp tone

7. 07

   2 AA lithium cells

   Run the pod for about 2.4 years (estimate)

   XIAO ESP32-C3 (LeafPod) · 3.3 V buck-boost · Power

8. 08

   ClearZone fence camera

   Photos the strip outside the fence; alerts if something stays

   XIAO ESP32S3 Sense · Home Wi-Fi (MQTT) · Alert photos

9. 09

   All connected

   7 key parts, one program, and your phone

How the parts connect

PoolGuard, 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 PoolGuard

for (;;) {
    deep_sleep_until(imu.wake_interrupt());
    hall_power(true);
    while (imu.moving()) track_swing(imu.gyro_104hz());
    delay(3000);                           // SETTLE
    gap = hall_gap_mm();
    result = classify(gap, home_gap, bounced, open_secs);
    if (result != HOME) { piezo_chirp(); }
    mqtt_publish("gate", result, close_s, v_arrive, gap, battery_mv());
    hall_power(false);
}

To your phone

How the data reaches PoolGuard app

Phone

1. LeafPod
2. Home Wi-Fi · MQTT over TLS
3. Cloud
4. Push alert
5. Owner's phone

Key specs

Targets for production units; they may change during development.

Pricing

Target pricing. Installation, cabling and extra wristbands quoted per site.

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

1. 28 Oct 2026, 06:40LatestOne 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

2. 27 Oct 2026, 13:25A family with a backyard pool needs three things checked that they now check by eye: that the self-closing gate really shut, that nothing climbable is left against the fence, and that the pump pad is dry. A dripping pump seal wets the motor bearings and shortens the motor's life, and the leak often drips down unseen (VEVOR pool pump guide); faulty gates and climbable objects are the top pool barrier faults (Royal Life Saving WA). Our own two products for this cost $398 with two apps.

   • Combined into PoolDeck (https://iemilabs.com/products/pooldeck/); PoolGuard itself is unchanged

   See it in 3DFull research and design

3. 26 Oct 2026, 04:50Families with a backyard pool need to know when something a child could climb, such as a chair, pot plant, esky or toy, has been left in the 900 mm strip outside the pool fence. Royal Life Saving WA lists climbable objects as one of the most common reasons pools fail inspection, and Auckland Council found 25% of pools failed their first inspection, with planters and furniture near the fence among the causes.

   • New CAD parts: ClearZone camera case, lid and a 12° post wedge that aims the camera along the fence and out over the strip; 6 of 6 fit checks pass
   • Hardware: XIAO ESP32S3 Sense camera board, buck-boost and 2 AA lithium cells; about $39 per pod at qty 1 (est.)
   • Software: a "clear" reference photo, a marked 900 mm strip, 6 checks a day, people and pets ignored, alert with a photo when a new object stays 20 minutes
   • Design doc: dated section with 7 sources, a view and pixel check, a battery estimate and 5 new tests
   • Product page: renamed PoolGuard, new tagline, summary, problem, highlights, family use cases and 3 new FAQs; prices $69 per pod and $199 Fence Kit

   See it in 3DFull research and design

4. 25 Oct 2026, 13:27Rev B: the camera kit was an attachment next to the barrier → the gate itself now reports every close, on any latch brand, with nothing opened or modified

   • Upgraded design: 13 printed parts in code CAD, bought parts fit-checked
   • Market research, hardware list and use case written up
   • Design page and kit render published
   • Product page added

   See it in 3DFull research and design