#include<HX711.h>
const int ld_cell = 2;
const int ld_sck = 4; 
float acceleration_due_to_gravity = 9.81; // Aceleração devido à gravidade em m/s²
HX711 scale;
const int redPin = 23;
const int greenPin = 22;
const int bluePin = 21;

void setup() {
  Serial.begin(115200);
  scale.begin(ld_cell,ld_sck);
  scale.set_scale(419.8);
  scale.tare();
  pinMode(13, INPUT);
  Serial.println("iniciando...");
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  if (digitalRead(13)==HIGH) {
    float weightNewton = measure();
    if (weightNewton >= 40) {
      colorRGB(255, 0, 127);
    }
    else {
      colorRGB(32, 168, 170);
    }
  }
  delay(1000);
}

void colorRGB(int red, int green, int blue) {
  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);
}

float measure() {
  if(scale.is_ready()){
    Serial.println("Removendo o peso da tara...");
    delay(500);
    Serial.println("Tara feita.");
    Serial.println("Agora coloque peso.");
    delay(500);
    long reading = scale.get_units();
    float weight_in_newtons = reading * acceleration_due_to_gravity; // Converte para Newtons
    Serial.print("Peso em Newtons: ");
    Serial.println(weight_in_newtons, 2); 
    return weight_in_newtons;
  }
}