MuTech RoboticsLearning Hub
Adults onlyESP32Level 2/3

LPG Gas Level Meter

A load cell weighs the cylinder and your phone shows how much gas is left, with an alert at 20%.

LPG Gas Level Meter
Adults only

Involves an LPG cylinder.

Not for children. Build at your own risk.

Strictly follow the description given with this video.

Video

The video link will be added here soon.

How it works

  1. The cylinder stands on a 50 kg load cell.
  2. The HX711 amplifier turns the tiny load-cell signal into a weight reading.
  3. The ESP32 subtracts the empty-cylinder weight and works out the gas left in %.
  4. Below 20% it sends a phone alert so you can book a refill early.

Parts you need

  • ESP32 dev board× 1Buy
  • 50 kg load cell× 1Buy
  • HX711 load-cell amplifier× 1Buy
Kit for this projectPrice on request
Get the kit

Wiring

Wiring diagram
PowerGroundSignal
#FromConnect to
1 GroundHX711 GNDESP32 GND
2 SignalHX711 DTESP32 D21
3 SignalHX711 SCKESP32 D22
4 PowerHX711 VCCESP32 3V3
5 PowerLoad cell redHX711 E+
6 SignalLoad cell blackHX711 E−
7 SignalLoad cell whiteHX711 A−
8 SignalLoad cell greenHX711 A+

3D print files

This project has no 3D-printed parts.

Code

The tested Arduino / ESP32 code for this project will be posted here, ready to copy.