Fridge-magnet pod that counts cooker whistles and says when to stop
Software: No subscription required
Concept, not for sale yet. Tell us if you want it; that decides what we build.
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How it fits together
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01
The whole CookerCount
A kitchen pod listens for pressure cooker whistles, counts them on LEDs and sounds a buzzer at your target.
02Brain
ESP32-C3-MINI-1
The brain: it runs the CookerCount firmware program
03
I²S microphone
Hears the cooker whistle; powered only during a cook
ESP32-C3-MINI-1 · I²S (3 wires) · 16 kHz digital sound
04
8-LED count bar
Shows whistles counted, 1 LED per whistle
ESP32-C3-MINI-1 · 3 GPIO to shift register · LED on/off bits
05
Magnetic buzzer
Sounds a 2.7 kHz alert at your target count
ESP32-C3-MINI-1 · GPIO PWM pin · Tone signal
06
Set and teach button
Sets the target, teaches your whistle and wakes the pod
ESP32-C3-MINI-1 · GPIO pin · Button presses
07
LiPo cell + USB-C
Runs about 14 days per charge; USB-C charges and flashes
ESP32-C3-MINI-1 · 3.3 V regulator, USB-C · Power, firmware
08
All connected
6 key parts, one program, and your phone
What it is
A small magnetic pod that listens for pressure-cooker whistles and counts them for you.
What it does
Who it's for
Home cooks in India and Indian households abroad who use pressure cookers.
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 (state == LISTEN) {
i2s_read(mic, block, 256); // 16 kHz, hop 256
bands = fft_log_bands(block, 16); // 250 Hz to 8 kHz
hit = whistle_candidate(bands, noise_floor); // onset, 0.6-6 s, falls
if (hit && !is_reject(bands) && matches_template(bands, 0.85)
&& refractory_over()) {
count++;
shift595_write(bar_for(count)); // 3 GPIO to 74HC595
ble_notify_state(count, target); // if a phone is paired
if (count == target) state = ALERT; // buzzer PWM on GPIO 20
}
if (minutes_since_last_whistle() > 45) state = SLEEP;
}To your phone
iPhone or Android, no account needed
One screen for each job CookerCount does.
Whistle countDal is on the gas. The cook presses three times for 3 whistles and leaves the kitchen; the pod lights one LED per whistle.
Cook historyEvery cook is saved with its dish, whistles and minutes, so the family can see how long the usual dal and rice take.
App screens with sample data. The interface is in development.
| Whistle count | 2 of 3 | Each whistle |
|---|---|---|
| Cook time | 11 min | During a cook |
| Target reached | 3 whistles, dal done | At target |
| Pod battery | 82% | During a cook |
| Cook history | Rice, 2 whistles | After each cook |
No audio leaves the pod, and the mic is off outside a cook. Nothing is sent unless paired.
CAD design · Design complete (stages 1–6), not built
| AI processor | ESP32-C3-MINI-1 (on-device sound model) |
|---|---|
| Sensors | InvenSense INMP441 I2S MEMS microphone · Piezo buzzer · Ring of 8 count LEDs (WS2812B class) |
| Connectivity | Wi-Fi · BLE |
| Power | USB-C rechargeable 500 mAh LiPo, about 2 weeks typical use (est.) |
| Enclosure | Lime-accented white square pod with a microphone grille, a ring of 8 count LEDs around a single button, a magnetic back for fridge or wall, and a USB-C port |
| Dimensions | 5 × 5 × 2 cm |
| Weight | ~45 g (est.) |
| Whistle count | 1–8 on the LED ring; higher counts in the app |
|---|---|
| Listening range | Up to ~4 m from the stove (target) |
| Processing | On the device; audio never uploaded |
| Simmer timer | Optional, after the last whistle |
| Pod | Buzzer and flashing LED ring |
|---|---|
| Phone | Push notification over Wi-Fi or BLE |
| Accessibility | Vibration and flash mode via phone or smartwatch |
| Family | Optional alert if nobody acknowledges |
| Battery | 500 mAh LiPo, about 2 weeks typical use (est.) |
|---|---|
| Charging | USB-C |
| Size | 5 × 5 × 2 cm |
| Mounting | Magnetic back for fridge or wall |
Targets for production units; they may change during development.
Hardware: $19 per unit
Software: No subscription required
Target pricing. India pricing in rupees to be confirmed. No subscription planned; the app is free.
$19
One whistle-counting pod for one kitchen.
$29 (target)
For deaf and hard-of-hearing cooks.
3 pods (quote)
For joint families, parents' homes or gifting.
Indicative launch pricing in USD, excluding taxes and shipping. Final pricing is confirmed before any balance is charged.
Community
CookerCount 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
No. Sound is processed on the pod only to detect whistles. Audio is never stored or uploaded. Only whistle counts and times are sent to the app.
No. It is in development and holds no certifications yet. Radio, EMC and battery testing (for example FCC, CE and India radio approval) are planned before sale. CookerCount only counts whistles; it does not control the cooker and does not prevent pressure-cooker faults, so always follow your cooker maker's safety instructions.
Charge it with USB-C, stick it to the fridge or a nearby wall with the magnetic back (or the included metal plate), and pair it with the app. Setup takes about two minutes.
No. Counting and alerts on the pod work without any network. BLE sends alerts to a nearby phone, and Wi-Fi lets you get alerts when you are further away.
No. It is a new concept in development. Specifications are target specifications. It is a concept: we are not taking orders, reservations or deposits, and it has no ship date yet.
We are planning a 2-year limited hardware warranty covering manufacturing defects. Final terms will be published before shipping begins.
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DetailsCookerCount
Concept · target $19