One kit for a club ground: crease camera, smart stumps, over-rate clock, umpire band and the bowling machine in the nets
Software: $19 per month, optional (League Stream); the local app needs no plan
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How it fits together
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01
The whole Cricket MatchKit
A Pi 5 on a boundary stand films the crease, hears the stumps, runs the over-rate clock and the umpire bands, and tracks the bowling machine in the nets.
02Brain
Raspberry Pi 5 (MatchMast)
The brain: it runs the matchkit-mast program
03
Global shutter camera
Films the crease on match days, the ball in the nets
Raspberry Pi 5 (MatchMast) · CSI-2 ribbon cable · 60 fps video
04
Stump radio dongle
Hears bail-off and stump-hit times from the SmartStump wicket
Raspberry Pi 5 (MatchMast) · USB-A port · Bail and stump events
05
NFC card reader
Coach key card and each junior batter's card in the nets
Raspberry Pi 5 (MatchMast) · I²C (4 wires) · Card IDs
06
Over-rate clock digits
Shows overs behind, the 90 s new-batter count, spell overs
Raspberry Pi 5 (MatchMast) · 6-core lead (3 GPIO) · Digit data and 12 V
07
Umpire band
Counts balls, opens reviews, buzzes foot over and bail clear
XIAO ESP32-C3 · BLE radio · Keys, counts and buzzes
08
DialDrive on the machine
Turns the bowling machine's speed knob to hold the length
XIAO ESP32C3 · Wi-Fi (WebSocket) · Dial angle commands
09
PD bank and 12 V trigger
Powers the Pi and the digits for a full match day
Raspberry Pi 5 (MatchMast) · USB-C power lead · 5 V and 12 V
10
All connected
8 key parts, one program, and your phone
What it is
A cricket kit with one brain per crease that does a club ground's match evidence, counts, over-rate and nets jobs.
What it does
Who it's for
Cricket clubs with a league side and a junior section with nets.
How the parts connect
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
while True:
frame = cam.capture() # Picamera2, 60 fps
ring.push(frame)
if mode == 'match':
if foot.landed(frame) and foot.over_line():
band.buzz('FOOT') # BLE to the umpire band
for ev in stumps.events(): # nRF52840 dongle over USB
if ev.kind == 'bail_clear':
gap = crease.measure(ring, ev.t)
band.show(gap); app.publish('runout', gap)
rate.tick(band.balls()); clock.show(rate.behind())
else: # nets
ball = tracker.update(frame)
if ball.bounced: dial.nudge(target - ball.length)To your phone
Scorer's laptop, iPhone or Android browser
One screen for each job Cricket MatchKit does.
Run-out reviewA batter dives for a second run as the bails come off. The umpire opens the review and sees where the bat was at that exact moment.
Front-foot callsThe mast checks every front foot. When no part is behind the popping crease, the bowler's-end umpire's band buzzes before the next ball.
Over-rate and spellsThe umpire band counts balls and overs. Big digits under the mast show how far behind the rate the side is, and junior spells are tracked.
Nets lengthOn nets night the mast stands behind the bowling machine. It measures each ball's length and turns the machine's knob to hold what the coach set.
App screens with sample data. The interface is in development.
| Run-out gap at bail-off | Bat 40 mm short | Each wicket review |
|---|---|---|
| Front-foot calls | Over 14 ball 3: no part behind | Each ball |
| Over-rate | 1.5 overs behind, 12 min left | Each over |
| Bowler spell | J. U15: 2 overs left in spell | Each over |
| Nets lengths | Good length 7.1 m ±0.3 | Each ball |
Video stays on the kit's Wi-Fi; in League Mode only umpires open reviews. No face recognition.
CAD design · Design rev A, 27 Oct 2026: CAD, fit checks and assembled 3D model done; not built
| AI processor | Raspberry Pi 5 2GB with Active Cooler in each MatchMast |
|---|---|
| Sensors | Raspberry Pi Global Shutter Camera (Sony IMX296) with a 50 mm C-mount or 6 mm CS lens · SmartStump Pro wooden stumps and bails (Hall, accelerometer and mic inside the wood) · Elechouse PN532 NFC reader for coach and batter cards · Umpire band keys: BALL, CHECK, MARK |
| Connectivity | Wi-Fi access point and MQTT to the scorer and phones · BLE to the umpire bands · Nordic nRF52840 dongle for the stumps' timed 2.4 GHz radio · Wi-Fi to the DialDrive |
| Power | 25,000 mAh USB-C PD bank per mast, about 8.7 h with the clock lit (est.); band about 50 h on 400 mAh (est.) |
| Enclosure | White ASA mast case, black ASA clock, orange ASA umpire band with TPU keys, LengthLock DialDrive |
| Dimensions | Mast case 150 x 110 x 67 mm; clock 250 x 43 x 190 mm; band 64 x 60 x 18.5 mm |
| Weight | ~0.9 kg per mast with bank, ~1.2 kg clock (est.) |
| Ingress rating | Outdoor, splash-resistant target (not tested) |
| Crease | Front-foot buzz, run-out and stumping gap, short runs, beamer height, League Mode |
|---|---|
| Wicket | Bail-off and stump-hit time from wooden SmartStump stumps |
| Counts | Balls, overs, junior spells and rest, over-rate and 90 s new batter |
| Nets | Length, line and speed per ball; DialDrive holds the length after a coach card |
| Mast | Any light stand with a 1/4"-20 stud, 2.6 m |
|---|---|
| Run time | About 8.7 h per mast with the clock (est.) |
| Range | Crease 45-75 m from the mast (stump radio range to be tested) |
| Video | Stays on the kit's own Wi-Fi |
Targets for production units; they may change during development.
Hardware: $2,799 per MatchKit (2 masts, clock, 2 umpire bands, DialDrive, SmartStump wicket both ends)
Software: $19 per month, optional (League Stream); the local app needs no plan
Target pricing. Bought separately, CreaseCam Pair ($1,199), SmartStump Match Kit ($1,599), LengthLock Junior Nets Kit ($529), PitchTally OverRate Kit ($279) and SpellCount Pair ($99) add up to $3,705. Parts cost about $1,456 per kit at qty 1 (est.).
$2,799
Both ends of one ground, match days and nets.
$129 per extra DialDrive
More bowling machines.
Custom
Leagues and umpire associations.
Indicative launch pricing in USD, excluding taxes and shipping. Final pricing is confirmed before any balance is charged.
Community
Cricket MatchKit is in development. Rate the idea, tell us what to change about the features, specs or price, and we'll build it with your feedback.
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Questions
Tell us what this would save you, or ask anything. We reply within two business days.
A member of the IEMI Labs team will reply within two business days.
From the product lab · ideation phase
It does the job of CreaseCam (crease camera, front-foot buzz and run-out evidence), SmartStump Pro (wooden stumps that time bail-off), LengthLock (bowling-machine length control in the nets) and PitchTally's OverRate and SpellCount kits (over-rate clock and junior spells). Bought separately those are $3,705; MatchKit is $2,799.
Yes. The kit buzzes, counts and shows evidence; every decision stays with the umpire, and in League Mode only umpires can open a review.
Yes. They are SmartStump Pro ash stumps and bails with the sensors inside the wood. MatchKit only listens to them by radio.
The DialDrive only moves after an adult coach taps a coach card on the mast, and each batter card carries a coach-set speed ceiling. The machine stays under adult control.
No. It is a concept in design. Specifications are targets. We are not taking orders, reservations or deposits, and it has no ship date yet.
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