16.重量測量

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

#include "HX711.h"

LiquidCrystal_I2C lcd(0x3F,16,2);   // 若LCD 無法啟用，請將0X3F 改為0X27

  // parameter "gain" is ommited; the default value 128 is used by the library

  // HX711.DOUT - pin #A1

  // HX711.PD_SCK - pin #A0

HX711 scale;

void setup() {

  Serial.begin(38400);

  lcd.init();                     

  lcd.backlight(); 

  lcd.clear();

  Serial.println("HX711 Demo");

  Serial.println("Initializing the scale");

  scale.begin(A1, A0);

  Serial.println("Before setting up the scale:");

  Serial.print("read: \t\t");

  Serial.println(scale.read()); // print a raw reading from the ADC

  Serial.print("read average: \t\t");

  Serial.println(scale.read_average(20));   // print the average of 20 readings from the ADC

  Serial.print("get value: \t\t");

  Serial.println(scale.get_value(5)); // print the average of 5 readings from the ADC minus the tare weight (not set yet)

  Serial.print("get units: \t\t");

  Serial.println(scale.get_units(5), 1); // print the average of 5 readings from the ADC minus tare weight (not set) divided

// by the SCALE parameter (not set yet)

  scale.set_scale(2280.f);           // this value is obtained by calibrating the scale with known weights; see the README for details

  scale.tare();                             // reset the scale to 0

  Serial.println("After setting up the scale:");

  Serial.print("read: \t\t");

  Serial.println(scale.read());                 // print a raw reading from the ADC

  Serial.print("read average: \t\t");

  Serial.println(scale.read_average(20));       // print the average of 20 readings from the ADC

  Serial.print("get value: \t\t");

  Serial.println(scale.get_value(5)); // print the average of 5 readings from the ADC minus the tare weight, set with tare()

  Serial.print("get units: \t\t");

  Serial.println(scale.get_units(5), 1);        // print the average of 5 readings from the ADC minus tare weight, divided

// by the SCALE parameter set with set_scale

  Serial.println("Readings:");

}

void loop() {

  Serial.print("one reading:\t");

  Serial.print(scale.get_units(), 1);

  Serial.print("\t| average:\t");

  Serial.println(scale.get_units(10), 1);

lcd.clear();

lcd.setCursor(0,0);

lcd.print(scale.get_units(), 1);

lcd.print(scale.get_units(10), 1);

  scale.power_down();         // put the ADC in sleep mode

  delay(5000);

  scale.power_up();

}