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

HX711 weight_sensor;
Servo food_hatch;
int LOW_THRESHOLD = 5;
int HIGH_THRESHOLD = 400;
bool SCHEDULED = true;

void setup() {
  Serial.begin(9600); // enable debugging
  Serial.println("Initializing the scale");
  weight_sensor.begin(A1, A0); // initialize the weight sensor
  food_hatch.attach(9);
}

void loop() {
  int curr_weight = weight_sensor.get_units(1) / 0.42;
  Serial.println(curr_weight, 1);
  // opens the food hatch when food weight reaches low threshold or it's time for a scheduled feeding 
  if (curr_weight <= LOW_THRESHOLD || SCHEDULED) {
    food_hatch.write(180);
    Serial.print("Hatch opened");
  }
  //closes the food hatch when food weight reaches high threshold
  if (curr_weight >= HIGH_THRESHOLD) {
    SCHEDULED = false;
    food_hatch.write(0);
    Serial.print("Hatch closed");
  }
}