Smart Coffee Table with Nano and HX711 © GPL3+

/**
 *
 * HX711 library for Arduino - example file
 * https://github.com/bogde/HX711
 *
 * MIT License
 * (c) 2018 Bogdan Necula
 *
**/
#include "HX711.h"


// HX711 circuit wiring
const int LOADCELL_DOUT_PIN = 2;
const int LOADCELL_SCK_PIN = 3;


HX711 scale;

void setup() {
  Serial.begin(38400);
  Serial.println("HX711 Demo");
  pinMode(9,OUTPUT);
   pinMode(10,OUTPUT);
    pinMode(11,OUTPUT);

  Serial.println("Initializing the scale");

  // Initialize library with data output pin, clock input pin and gain factor.
  // Channel selection is made by passing the appropriate gain:
  // - With a gain factor of 64 or 128, channel A is selected
  // - With a gain factor of 32, channel B is selected
  // By omitting the gain factor parameter, the library
  // default "128" (Channel A) is used here.
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);

  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(10*scale.get_units(), 1);
  Serial.print("\t| average:\t");
  Serial.println(10*scale.get_units(10), 1);





if(10*scale.get_units()<185)
{
  analogWrite(9,255);
  analogWrite(10,0);
  analogWrite(11,0);
  }
 else if(10*scale.get_units()<220)
  {
    analogWrite(9,255);
    analogWrite(10,0);
    analogWrite(11,100);
   }
    else if(10*scale.get_units()<270)
  {
    analogWrite(9,0);
    analogWrite(10,0);
    analogWrite(11,200);
   }
    else if(10*scale.get_units()<320)
  {
    analogWrite(9,0);
    analogWrite(10,255);
    analogWrite(11,0);
   }
   else{
   analogWrite(9,100);
  analogWrite(10,200);
  analogWrite(11,200);}








  
  scale.power_down();			        
  delay(5);
  scale.power_up();
}