#include "HX711.h"

// HX711 circuit wiring
const int DT1 = 13;
const int SCK1 = 12;
const int DT2 = 14;
const int SCK2 = 27;
const int DT3 = 26;
const int SCK3 = 25;
const int DT4 = 33;
const int SCK4 = 32;
const int DT5 = 23;
const int SCK5 = 22;
const int DT6 = 21;
const int SCK6 = 19;

// Instantiate 6 weight sensors
HX711 s1;
HX711 s2;
HX711 s3;
HX711 s4;
HX711 s5;
HX711 s6;

void setup() {
  Serial.begin(115200);
  Serial.println("Foot forces");

  Serial.println("Initializing the scale");

  // Indicate the GPIOs for each sensor
  s1.begin(DT1, SCK1);
  s2.begin(DT2, SCK2);
  s3.begin(DT3, SCK3);
  s4.begin(DT4, SCK4);
  s5.begin(DT5, SCK5);
  s6.begin(DT6, SCK6);

  s1.set_scale(420.0f);   // Scaling constant for sensor 1
  s1.tare();				      // Reset the scale to 0

  s2.set_scale(420.0f);   // Scaling constant for sensor 2
  s2.tare();				      // Reset the scale to 0

  s3.set_scale(420.0f);   // Scaling constant for sensor 3
  s3.tare();	            // Reset the scale to 0

  s4.set_scale(420.0f);   // Scaling constant for sensor 4
  s4.tare();	            // Reset the scale to 0

  s5.set_scale(420.0f);   // Scaling constant for sensor 5
  s5.tare();	            // Reset the scale to 0

  s6.set_scale(420.0f);   // Scaling constant for sensor 6
  s6.tare();	            // Reset the scale to 0

  Serial.println("Readings:");
}

void loop() {

  // Print the average of 10 readings for each sensor
  Serial.print("S1: ");
  float sen1 = s1.get_units(10);
  Serial.print(sen1, 1);
  Serial.print(" kg | S2: ");
  float sen2 = s2.get_units(10);
  Serial.print(sen2, 1);
  Serial.print(" kg | S3: ");
  float sen3 = s3.get_units(10);
  Serial.print(sen3, 1);
  Serial.print(" kg | S4: ");
  float sen4 = s4.get_units(10);
  Serial.print(sen4, 1);
  Serial.print(" kg | S5: ");
  float sen5 = s5.get_units(10);
  Serial.print(sen5, 1);
  Serial.print(" kg | S6: ");
  float sen6 = s6.get_units(10);
  Serial.print(sen6, 1);
  Serial.print(" kg | Total: ");
  // Print the sum of all the sensors
  Serial.print(sen1+sen2+sen3+sen4+sen5+sen6, 1);
  Serial.println(" kg");

  // Sleep mode in between readings for low power consumption 
  // s1.power_down();
  // s2.power_down();
  // s3.power_down();
  // s4.power_down();
  // s5.power_down();
  // s6.power_down();
  delay(3000);
  // s1.power_up();
  // s2.power_up();
  // s3.power_up();
  // s4.power_up();
  // s5.power_up();
  // s6.power_up();
}