CourtPost

How it fits together

CourtPost, 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 CourtPost

   One unit on the net post keeps the score, replays line calls, measures the noise and the paddle pops, sees whether the court is in use, and sends it all to one app.

2. 02Brain

   ESP32-S3 (base unit board)

   The brain: it runs the courtpost-base firmware program

3. 

   03

   Score screen and keys

   Shows score, server, quiet hours and check-in; three keys score and challenge

   ESP32-S3 (base unit board) · SPI and key lines over the 0.6 m head lead · Screen image and key presses

4. 

   04

   Replay computer and line cameras

   Woken on CHALLENGE: finds the bounce and draws it against the line

   ESP32-S3 (base unit board) · Power switch + RS-485 over the head lead; cameras on CSI · Wake command in, verdict and clip out

5. 05

   Measurement mic

   Noise levels for neighbours and the pitch of each paddle pop

   ESP32-S3 (base unit board) · PDM, 6-way lead up the stalk · Sound levels (no audio kept)

6. 

   06

   Court radar

   Sees players on court: no-show release and lights-off

   ESP32-S3 (base unit board) · UART · Up to 3 targets, 10 times a second

7. 07

   LTE-M radio

   Sends everything to the app with no club Wi-Fi

   ESP32-S3 (base unit board) · UART (AT + MQTT) · Events and summaries

8. 08

   Solar and battery

   A 3.5 W panel on the cap charges one LiFePO4 pack for everything

   ESP32-S3 (base unit board) · I²C to the charger · Charge and battery level

9. 09

   All connected

   7 key parts, one program, and your phone

How the parts connect

CourtPost, 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 CourtPost

for (;;) {
    meter_tick();                                // LAeq, LAFmax, pops
    if (pop_heard()) quiet_judge(pop_pitch());   // loud gear in quiet hours?
    occupied = radar_people() > 0;
    switch (key_event()) {
        case GAME_A: case GAME_B: score_add(key); break;
        case CHALLENGE: pi_power(true); show(pi_wait_verdict(20 s)); pi_power(false); break;
        case HOLD_MID: booking_check_in(); break;
    }
    if (booking_due() && !occupied && mins_since_start() > 10) booking_release();
    if (changed()) epaper_show(score(), server(), quiet_state(), booking());
    lte_flush();                                 // nRF9151, MQTT over TLS
}

To your phone

How the data reaches CourtPost club and park app

Phone browser for players, club and park staff; read-only view for neighbours

1. Pi 5 replay
2. RS-485 head lead
3. Base brain
4. LTE-M · MQTT over TLS
5. IEMI cloud
6. App and push
7. Players, club, park, neighbours

Key specs

Targets for production units; they may change during development.

Pricing

Target pricing. Bought separately, ScorePost with camera pods ($649), a RallyPair ($129) and a LetTap ($79), plus a PickleQuiet fence unit ($899) with the radar ($149) and a QuietLight ($169), add up to $2,074 + $44/month per court. Parts cost about $485 per court unit at qty 1 (est.).

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.

   • New product CourtPost: one unit on the net post does the jobs of ScorePost and PickleQuiet, with one ESP32-S3 brain, one LTE-M radio, one LiFePO4 battery and one app; the Raspberry Pi 5 only wakes for a challenge
   • Reused CAD parts unchanged: ScorePost's score head, back, camera pod and BaseClip; PickleQuiet's base unit body, back plate, gasket, mic stalk, retainer, rain hood, battery cradle and post clamp. New part: a white solar cap with a 3.5 W panel that slides over the head and shades the screen. 14 printed parts, each one solid, every bought part fits
   • 3D view: a tennis net post with the score head and solar cap on top, the base unit and mic under it on the same post, and a BaseClip on the side fence
   • Dropped: ScorePost's power bank and its ESP32 screen board; PickleQuiet's fence-post mount, solar bracket and QuietLight puck (the big screen and a 2-second hold on the middle key replace it). SmartLine AI, a grass-field line painter, did not fit on a net post and was not merged
   • Product page https://iemilabs.com/products/courtpost/: $1,290 + $29/month per court instead of $2,074 + $44/month; parts about $485 at quantity 1 (est.)

   See it in 3DFull research and design

4. 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/); ScorePost itself is unchanged

   See it in 3DFull research and design

5. 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