PickleQuiet

How it fits together

PickleQuiet, 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 PickleQuiet

   A fence-mounted box measures court noise and counts paddle pops without storing audio, then sends signed hourly records over LTE-M to a dashboard.

2. 02Brain

   ESP32-S3-WROOM-1

   The brain: it runs the picklequiet-fw program

3. 03

   IM69D130 microphone

   Hears the courts through a weatherproof membrane on a stalk

   ESP32-S3-WROOM-1 · PDM, 6-way cable · Digital audio bits

4. 

   04

   LD2450 radar

   Sees where people stand on each court, with no images

   ESP32-S3-WROOM-1 · UART, 256000 baud · Target x, y, speed

5. 05

   nRF9151 LTE-M modem

   Sends records to the cloud over the mobile network

   ESP32-S3-WROOM-1 · UART (AT commands) · MQTT messages

6. 06

   BQ25798 solar charger

   Charges the cells from a solar panel or 12 V supply

   ESP32-S3-WROOM-1 · I²C and power rail · Charge status and power

7. 07

   Two LiFePO4 cells

   Store 38 Wh so the box runs through the night

   ESP32-S3-WROOM-1 · Charger and 3.3 V rail · Power

8. 

   08

   QuietLight net-post unit

   Hears pops at one court and shows a green or amber light

   XIAO ESP32-S3 · ESP-NOW radio · Pop levels per court

9. 09

   All connected

   7 key parts, one program, and your phone

How the parts connect

PickleQuiet, 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 PickleQuiet

void audio_task(void *arg) {
    for (;;) {
        i2s_channel_read(pdm_rx, buf, sizeof buf, &n, portMAX_DELAY);
        meter_update(buf, n);               // A/C weighting, Fast/Slow, LAeq
        if (pop_candidate(buf, n)) {        // 15 dB rise in under 3 ms
            pop_features(buf, &f);          // 1024-pt FFT, 21 ms window
            if (pop_classify(&f) == POP)
                minute.pops++;
        }
        if (second_elapsed()) minute_add(meter_snapshot());
        // samples are never copied out; the buffer is overwritten
    }
}

To your phone

How the data reaches PickleQuiet dashboard

Browser, plus email, SMS and webhooks

1. Fence unit
2. LTE-M · MQTT over TLS
3. Cloud
4. Web dashboard · email · SMS
5. Operator's phone

Key specs

Targets for production units; they may change during development.

Pricing

Target pricing: CourtLight Kit $699 for 4 courts (4 QuietLights with CHECK IN keys + 2 floodlight relays; electrician extra), QuietLight $169 each. Fence noise unit $899 + $39/mo, or $1,200 per 60-day study rental. CourtPulse radar option +$149. Estimated BOM about $155 per fence unit with radar, about $55 per QuietLight and about $45 per court for the relay share (many prices unverified).

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

1. 27 Oct 2026, 23:50LatestOne tennis and pickleball product per court, as the smart net posts themselves.

   • Still part of RacketOne, now redesigned as smart net posts: https://iemilabs.com/products/racketone/

   See it in 3DFull research and design

2. 27 Oct 2026, 17:55Tennis and pickleball clubs and parks need one product per court, not several kits and apps.

   • Folded into RacketOne: see https://iemilabs.com/products/racketone/

   See it in 3DFull research and design

3. 27 Oct 2026, 09:52Parks, HOAs and clubs with courts near homes face several jobs on every court: neighbours complain about paddle noise and cities measure by hand at the fence (Cupertino limited hours in May 2026; Denver measured over 70 dB against a 55 dB limit; a Berwyn YMCA closed courts in a lawsuit), quiet-gear hours are posted on signs nobody checks, booked courts at $10–20 an hour sit empty (Tualatin Hills, Kino, Boulder), and rec play has no referee for score and line arguments. Our own two products for it cost $2,074 and $44 a month per court.

   • Combined into CourtPost (https://iemilabs.com/products/courtpost/); PickleQuiet itself is unchanged

   See it in 3DFull research and design

4. 26 Oct 2026, 13:52Tennis and pickleball clubs and parks lose booked courts to no-shows and pay £4–7.20 an hour to light empty courts. Their rules void a booking if nobody checks in within 10 minutes (City of Edmonton, North Hudson WI) or 10–15 minutes (LTA ClubSpark clubs), but with no staff on site nobody knows who turned up, and lights tied to the booking stay on for the whole hour. Sources: Edmonton and North Hudson court rules, LTA ClubSpark club booking and floodlight pages, Warwick District Council.

   • Changed CAD part quietlight-case: a 16 mm CHECK IN key below the screen inside a raised guard ring so a ball cannot press it (15/15 fit checks, still one solid)
   • New court software: lights on 5 minutes before a booking, release and lights off at 10 minutes with no press and no play, amber warning before any switch-off, curfew honoured; 12/12 booking checks pass
   • New bought parts: a listed DIN-rail relay per two courts on the existing floodlight contactor, fitted by an electrician
   • BOM: about $4.50 per court light for the key and about $45 per court for the relay share (est.); target CourtLight Kit $699 for 4 courts
   • Product page, design page and DESIGN.md updated with the no-show and floodlight use cases, FAQs, sources and a rules note

   See it in 3DFull research and design

5. 26 Oct 2026, 08:51Cities with pickleball courts beside homes now set quiet-gear hours but cannot check them: Laguna Beach requires quiet paddles at Lang Park with rangers enforcing, Cupertino asks for USA Pickleball Quiet Category paddles and balls from dawn to 9 am and 7–9 pm with signs only, and Carmel-by-the-Sea banned play because quiet gear "would have required monitoring" (city notices, Spectrum News, Fox News, USA Pickleball).

   • New CAD part: QuietLight case for each net post, with an e-paper screen facing the court, a microphone port with a waterproof membrane and 12 light holes; 12 of 12 fit checks pass
   • New CAD parts: back cover with a V-shaped clamp seat for 38 mm square to 76 mm round net posts (9 of 9 fit checks), and a clear light pipe that glows green or amber (12 of 12)
   • New court logic: pops judged by pitch, counted only on the court that heard them loudest, amber after 5 minutes of mostly loud pops, one count to the park after 15 minutes; 11 of 11 replayed checks pass
   • BOM: about $50 per court light (est.); product page updated with quiet-gear hours, new FAQs on legality and how it tells paddles apart

   See it in 3DFull research and design