#include <HX711_ADC.h>

#define DOUT 3         // HX711 DOUT pin
#define CLK 2          // HX711 SCK pin

HX711_ADC scale(DOUT, CLK); // Create instance of HX711_ADC

float calibrationFactor = 7050.0; // Initial calibration factor (can be adjusted manually)
float weight;

void setup() {
  Serial.begin(9600);
  Serial.println("Calibration Process for HX711 Load Cell");

  // Initialize the HX711 scale
  scale.begin();
  scale.start(2000); // Stabilize readings over 2 seconds
  scale.setCalFactor(calibrationFactor); // Set the initial calibration factor

  // Tare the scale (zero it out)
 // scale.tare();
  Serial.println("Scale tared. Place a known weight on the scale and adjust the calibration factor.");
}

void loop() {
  // Update scale readings
  scale.update();
  
  // Get the weight value in kilograms
  weight = scale.getData();

  // Print the current weight and calibration factor
  Serial.print("Weight: ");
  Serial.print(weight, 2);  // Print the weight with 2 decimal places
  Serial.print(" kg, Calibration Factor: ");
  Serial.println(calibrationFactor);

  // Allow manual adjustment of calibration factor using Serial Monitor
  if (Serial.available() > 0) {
    char input = Serial.read();
    if (input == '+') {
      calibrationFactor += 10000;  // Increase calibration factor
    } else if (input == '-') {
      calibrationFactor -= 10000;  // Decrease calibration factor
    }
    scale.setCalFactor(calibrationFactor); // Update the calibration factor
  }

  delay(500);  // Delay for readability
}