#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <HX711.h>
// A digital scale: the load cell bar bends a tiny amount under weight and the
// HX711 amplifier turns that into numbers. Two things make it a real scale:
// tare() (zero with nothing on it) and the calibration factor (counts per gram).
// Slide the "weight" control on the HX711 to put things on the scale.
LiquidCrystal_I2C lcd(0x27, 16, 2);
HX711 scale;
void setup() {
Serial.begin(9600);
lcd.init();
lcd.backlight();
scale.begin(3, 2); // DT -> D3, SCK -> D2
scale.set_scale(420); // calibration: change this for your own load cell
scale.tare(); // zero the scale now
Serial.println("Scale ready (tared)");
}
void loop() {
float g = scale.get_units(3);
lcd.setCursor(0, 0); lcd.print("Weight: ");
lcd.setCursor(0, 1); lcd.print(g, 0); lcd.print(" g ");
Serial.print("Weight: "); Serial.print(g, 1); Serial.println(" g");
delay(400);
}
