HX_grocery_scale.ino

//
//    FILE: HX_grocery_scale.ino
//  AUTHOR: Rob Tillaart
// VERSION: 0.1.0
// PURPOSE: HX711 demo
//     URL: https://github.com/RobTillaart/HX711
//
// HISTORY:
// 0.1.0    2020-06-16 initial version
//


#include "HX711.h"

HX711 scale;

uint8_t dataPin = 6;
uint8_t clockPin = 7;


void setup()
{
  Serial.begin(115200);
  Serial.println(__FILE__);
  Serial.print("LIBRARY VERSION: ");
  Serial.println(HX711_LIB_VERSION);
  Serial.println();

  scale.begin(dataPin, clockPin);

  Serial.print("UNITS: ");
  Serial.println(scale.get_units(10));
  
  Serial.println("\nEmpty the scale, press a key to continue");
  while(!Serial.available());
  while(Serial.available()) Serial.read();
  
  scale.tare();
  Serial.print("UNITS: ");
  Serial.println(scale.get_units(10));


  Serial.println("\nPut 1000 gr in the scale, press a key to continue");
  while(!Serial.available());
  while(Serial.available()) Serial.read();

  scale.calibrate_scale(1000, 5);
  Serial.print("UNITS: ");
  Serial.println(scale.get_units(10));

  Serial.println("\nScale is calibrated, press a key to continue");
  while(!Serial.available());
  while(Serial.available()) Serial.read();

  scale.set_unit_price(0.031415);  // we only have one price
}


void loop()
{
  Serial.print("UNITS: ");
  Serial.print(scale.get_units(5));
  Serial.print("\t\tPRICE: ");
  Serial.println(scale.get_price(5));
  delay(250);
}


// -- END OF FILE --