WeLeMeter

#include <HX711.h>
#include <Servo.h>

Servo my_servo1; //servo for weight sensor
Servo my_servo2; //servo for water sensor

int pos = 0;

const int ini_weight = 100; //100grams weight variable
const int water_level = 100; //100 water level variable

int x = 1; //change according to calibration
int y = 0; //change according to calibration

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

// water level sensor circuit wiring
const int sensorPower = 7;
const int sensorPin = A0;

int val = 0;

HX711 scale;

int calculate_weight();
int calculate_water();

void setup() {
  Serial.begin(57600);

  my_servo1.attach(8);
  my_servo2.attach(9);

  pinMode(sensorPower, OUTPUT);
  digitalWrite(sensorPower, LOW);

  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
}

void loop() {
  int weight = calculate_weight();
  Serial.print("Weight: ");
  Serial.print(weight);
  Serial.println(" g");
  if (weight >= ini_weight) {
    my_servo1.write(90);
  }
  else if (weight < ini_weight) {
    my_servo1.write(pos);
  }

  int level = calculate_water();
  Serial.print("Water level: ");
  Serial.print(level);
  if (level >= water_level) {
    my_servo2.write(90);
  }
  else if (level < water_level) {
    my_servo2.write(pos);
  }
}

int calculate_weight() {
  if (scale.is_ready()) {
    long reading = scale.read() * x;
    float grams = (float)reading / 100000.0;
    grams = grams - y;
    return grams;
  } else {
    Serial.println("HX711 not found.");
  }
  delay(1000);
}

int calculate_water() {
  digitalWrite(sensorPower, HIGH);
  delay(10);
  val = analogRead(sensorPin);
  digitalWrite(sensorPower, LOW);
  return val;
  delay(1000);
}