Intermediate4/7/2026- Author: IoTSpark Maker
ESP32 + Load Cell HX711: Precise Weight Measurement (Quick Test Sample Code)
A load cell is a metal-bar force sensor fitted with strain gauges (deformation resistors) — when a load presses on it, the metal bar deforms by a tiny amount, changing the strain gauges' resistance per a Wheatstone-bridge configuration.
load-cellhx711can-trong-luong
4 steps4 components
A load cell is a metal-bar force sensor fitted with strain gauges (deformation resistors) — when a load presses on it, the metal bar deforms by a tiny amount, changing the strain gauges' resistance in a Wheatstone-bridge configuration. The output signal is very small (mV), so it needs the HX711 — a dedicated amplifier + 24-bit ADC IC — to read accurately. Applications: digital scales, IoT kitchen scales, weight-based inventory monitoring.