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Izabela Grubicka » ajout_lcd.ino

Izabela Grubicka, 17/07/2026 15:46

 

#include <Arduino.h>
#include "HX711.h"
#include "soc/rtc.h"
#include <Wire.h>
#include <LiquidCrystal_I2C.h> //https://github.com/johnrickman/LiquidCrystal_I2C
#include <Pushbutton.h> //Pushbutton by Pololu

// HX711 circuit wiring
const int LOADCELL_DOUT_PIN = 16;
const int LOADCELL_SCK_PIN = 4;

HX711 scale;
int reading;
int lastReading;
#define CALIBRATION_FACTOR 388.9

LiquidCrystal_I2C lcd(0x27, 16, 2);

//Button
#define BUTTON_PIN 19
Pushbutton button(BUTTON_PIN);

void setup() {

Wire.begin(21, 22); // SDA = 21, SCL = 22 (pins par défaut du LCD sur un ESP32)

lcd.init();
lcd.backlight();
lcd.clear();

Serial.begin(115200);
rtc_cpu_freq_config_t config;
rtc_clk_cpu_freq_get_config(&config);
rtc_clk_cpu_freq_mhz_to_config(RTC_XTAL_FREQ_40M, &config);
rtc_clk_cpu_freq_set_config_fast(&config);

delay(2000);
Serial.println("Initializing the scale");
scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);

scale.set_scale(CALIBRATION_FACTOR); // this value is obtained by calibrating the scale with known weights; see the README for details
scale.tare(); // reset the scale to 0
}

void loop() {
if (button.getSingleDebouncedPress()){
Serial.print("tare...");
lcd.setCursor(3, 0);
lcd.print("tare...");
scale.tare();
}
if (scale.wait_ready_timeout(200)) {
reading = round(scale.get_units());
Serial.print("Weight: ");
Serial.println(reading);
lcd.setCursor(3, 0);
lcd.print("Weight: ");
lcd.print(reading);
lastReading = reading;
}
else {
Serial.println("HX711 not found.");
}
}
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