GasLock LPG

How it fits together

GasLock LPG, 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 GasLock LPG

   Four load cells under a cylinder trolley weigh the gas; a wall pod shows kilos left, days left and the day to book a refill.

2. 02Brain

   ESP32-C6-MINI-1 (wall pod)

   The brain: it runs the gaslock-pod program

3. 

   03

   Load cells (x4)

   Flex a hair under the cylinder's weight, one per deck foot

   ESP32-C6-MINI-1 (wall pod) · 3 wires each, to junction · Millivolt weight signal

4. 04

   Cell combinator

   Joins four cells into one bridge for the pod's HX711 amplifier

   ESP32-C6-MINI-1 (wall pod) · 4-core cable to HX711 · One bridge signal

5. 

   05

   E-paper display

   Shows kilos of gas left, days left and booking state

   ESP32-C6-MINI-1 (wall pod) · SPI · 200 x 200 image

6. 06

   BOOKED key

   You tap it once the refill is booked

   ESP32-C6-MINI-1 (wall pod) · GPIO pin · Key press

7. 07

   4 AA cells

   Run the pod for about a year on a 3.3 V converter

   ESP32-C6-MINI-1 (wall pod) · 3.3 V power rail · Battery power

8. 08

   All connected

   6 key parts, one program, and your phone

The idea

The cylinder trolley under the stove weighs the gas: days left, the day to book a refill and a check at the door

How the parts connect

GasLock LPG, 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 GasLock LPG

for (;;) {
    esp_sleep_enable_timer_wakeup(60 * 1000000ULL);
    esp_deep_sleep_start();                    // wakes after 60 s
    gross = hx711_read_kg(avg_samples);        // 10 SPS, averaged
    gas = gross - deck_tare - cyl_tare;
    if (swap_detected(gross)) cyl_tare = ask_tare();
    rate = burn_rate_14d(history, gas);
    days = gas / rate;
    if (key_booked()) booked = now();
    if (twice_a_day()) epaper_draw(gas, days, book_from);
    if (hourly()) mqtt_publish(topic_state, state_json(gross, gas, days, bat_v));
}

To your phone

How the data reaches GasLock family app

iPhone, Android or laptop browser

1. Wall pod
2. Wi-Fi · MQTT/TLS
3. IEMI cloud
4. Web app, push and SMS
5. Phone

Key specs

Targets for production units; they may change during development.

Pricing

Target pricing. India pricing in rupees to be confirmed. Phone alerts are free; an optional family alert relay is planned at about Rs 49 per month.

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

1. 29 Oct 2026, 08:25LatestIndian households guess the gas left in their LPG cylinder, while in 2026 a refill can be booked only 25 days after the last delivery (35 for double-cylinder homes) and can take 15 to 20 days to arrive (Hitavada, 21 Apr 2026, sources in DESIGN.md).

   • Drawn idea plan (idea.json): a home kitchen from above with the counter, the two-burner stove and its hose, the sink, the cylinder on its trolley under the counter and the spare cylinder by the front door; pins for the wall pod, the weighing deck and a new cylinder being checked at the door
   • The product picture is now this drawn plan instead of the plain fallback card; drawn from the design notes, not the CAD
   • What the plan keeps from the market work: it sells knowing when to book and a check at the door, and the odd-hours notice is a usage notice, not a leak detector
   • Next: more drawn plans for catalogue products that still show the fallback card, then close-out C5 (buyer review prep for sports) from 12:00

   See it in 3DFull research and design

2. 27 Oct 2026, 01:58Owner decision (27 Oct 2026): merge our single-job products into multi-job devices.

   • New product page: https://iemilabs.com/products/kitchenguard/

   See it in 3DFull research and design

3. 25 Oct 2026, 01:26A protective clamp-on accessory was hard to sell → the product is now the cylinder trolley families already buy, with a weighing deck; the shut-off is an optional Plus kit

   • Upgraded design: 16 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